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profilePamela Whitney Schaefer, M.D.

TitleAssociate Professor of Radiology
InstitutionMassachusetts General Hospital
DepartmentRadiology
AddressMassachusetts General Hospital
Dept of Radiology Mz-GRB 285
55 Fruit St
Boston MA 02114
Phone617/726-8320
Fax617/724-3338
vCardDownload vCard (login for email)

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Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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  1. Raymond SB, Schaefer PW. Imaging Brain Collaterals: Quantification, Scoring, and Potential Significance. Top Magn Reson Imaging. 2017 Apr; 26(2):67-75. PMID: 28277461.
    View in: PubMed
  2. Branchi V, Schaefer P, Semaan A, Kania A, Lingohr P, Kalff JC, Schäfer N, Kristiansen G, Dietrich D, Matthaei H. Promoter hypermethylation of SHOX2 and SEPT9 is a potential biomarker for minimally invasive diagnosis in adenocarcinomas of the biliary tract. Clin Epigenetics. 2016; 8:133. PMID: 27999621.
    View in: PubMed
  3. Fenves AZ, Schaefer PW, Luther J, Pierce VM. CASE RECORDS of the MASSACHUSETTS GENERAL HOSPITAL. Case 21-2016. A 32-Year-Old Man in an Unresponsive State. N Engl J Med. 2016 Jul 14; 375(2):163-71. PMID: 27410926.
    View in: PubMed
  4. Prakkamakul S, Witzel T, Huang S, Boulter D, Borja MJ, Schaefer P, Rosen B, Heberlein K, Ratai E, Gonzalez G, Rapalino O. Ultrafast Brain MRI: Clinical Deployment and Comparison to Conventional Brain MRI at 3T. J Neuroimaging. 2016 Sep; 26(5):503-10. PMID: 27273370.
    View in: PubMed
  5. Prakkamakul S, Schaefer P, Gonzalez G, Rapalino O. MRI Patterns of Isolated Lesions in the Medulla Oblongata. J Neuroimaging. 2017 Jan; 27(1):135-143. PMID: 27221582.
    View in: PubMed
  6. Goyal M, Derdeyn CP, Fiorella D, Ross J, Schaefer P, Tarr R, Willson MC, Bartlett E, Wintermark M, Kallmes D. Recent Endovascular Trials: Implications for Radiology Departments, Radiology Residency, and Neuroradiology Fellowship Training at Comprehensive Stroke Centers. Radiology. 2016 Mar; 278(3):642-5. PMID: 26885731.
    View in: PubMed
  7. Leslie-Mazwi TM, Hirsch JA, Falcone GJ, Schaefer PW, Lev MH, Rabinov JD, Rost NS, Schwamm L, González RG. Endovascular Stroke Treatment Outcomes After Patient Selection Based on Magnetic Resonance Imaging and Clinical Criteria. JAMA Neurol. 2016 Jan; 73(1):43-9. PMID: 26524074.
    View in: PubMed
  8. Camargo EC, Schaefer PW, Singhal AB. Other cerebrovascular occlusive disease. Handb Clin Neurol. 2016; 135:317-50. PMID: 27432673.
    View in: PubMed
  9. Hirsch JA, Harvey HB, Barr RM, Donovan WD, Duszak R, Nicola GN, Schaefer PW, Manchikanti L. Sustainable Growth Rate Repealed, MACRA Revealed: Historical Context and Analysis of Recent Changes in Medicare Physician Payment Methodologies. AJNR Am J Neuroradiol. 2016 Feb; 37(2):210-4. PMID: 26585253.
    View in: PubMed
  10. Heit JJ, Gonzalez RG, Sabbag D, Brouwers HB, Ordonez Rubiano EG, Schaefer PW, Hirsch JA, Romero JM. Detection and characterization of intracranial aneurysms: a 10-year multidetector CT angiography experience in a large center. J Neurointerv Surg. 2016 Nov; 8(11):1168-1172. PMID: 26553878.
    View in: PubMed
  11. Harvey HB, Tomov E, Babayan A, Dwyer K, Boland S, Pandharipande PV, Halpern EF, Alkasab TK, Hirsch JA, Schaefer PW, Boland GW, Choy G. Radiology Malpractice Claims in the United States From 2008 to 2012: Characteristics and Implications. J Am Coll Radiol. 2016 Feb; 13(2):124-30. PMID: 26454772.
    View in: PubMed
  12. Rehani B, Hirsch JA, Dillon WP, González RG, Lev MH, Schaefer PW. Multiple Procedure Payment Reduction: Health Policy Update. AJNR Am J Neuroradiol. 2015 Nov; 36(11):2007-9. PMID: 26381559.
    View in: PubMed
  13. Young JY, Schaefer PW. Acute ischemic stroke imaging: a practical approach for diagnosis and triage. Int J Cardiovasc Imaging. 2016 Jan; 32(1):19-33. PMID: 26362874.
    View in: PubMed
  14. Wu O, Cloonan L, Mocking SJ, Bouts MJ, Copen WA, Cougo-Pinto PT, Fitzpatrick K, Kanakis A, Schaefer PW, Rosand J, Furie KL, Rost NS. Role of Acute Lesion Topography in Initial Ischemic Stroke Severity and Long-Term Functional Outcomes. Stroke. 2015 Sep; 46(9):2438-44. PMID: 26199314; PMCID: PMC4550548.
  15. Copen WA, Morais LT, Wu O, Schwamm LH, Schaefer PW, González RG, Yoo AJ. In Acute Stroke, Can CT Perfusion-Derived Cerebral Blood Volume Maps Substitute for Diffusion-Weighted Imaging in Identifying the Ischemic Core? PLoS One. 2015; 10(7):e0133566. PMID: 26193486; PMCID: PMC4508041.
  16. Hirsch JA, Manchikanti L, Albuquerque FC, Leslie-Mazwi TM, Lev MH, Linfante I, Mocco J, Rai AT, Schaefer PW, Tarr RW. The peer review process: a primer for JNIS readers. J Neurointerv Surg. 2015 Apr 17. PMID: 25888447.
    View in: PubMed
  17. Vachha BA, Schaefer PW. Imaging Patterns and Management Algorithms in Acute Stroke: An Update for the Emergency Radiologist. Radiol Clin North Am. 2015 Jul; 53(4):801-26, ix. PMID: 26046512.
    View in: PubMed
  18. Schaefer PW, Souza L, Kamalian S, Hirsch JA, Yoo AJ, Kamalian S, Gonzalez RG, Lev MH. Limited reliability of computed tomographic perfusion acute infarct volume measurements compared with diffusion-weighted imaging in anterior circulation stroke. Stroke. 2015 Feb; 46(2):419-24. PMID: 25550366; PMCID: PMC4308477.
  19. Copen WA, Deipolyi AR, Schaefer PW, Schwamm LH, González RG, Wu O. Exposing hidden truncation-related errors in acute stroke perfusion imaging. AJNR Am J Neuroradiol. 2015 Apr; 36(4):638-45. PMID: 25500309.
    View in: PubMed
  20. Mehan WA, González RG, Buchbinder BR, Chen JW, Copen WA, Gupta R, Hirsch JA, Hunter GJ, Hunter S, Johnson JM, Kelly HR, Larvie M, Lev MH, Pomerantz SR, Rapalino O, Rincon S, Romero JM, Schaefer PW, Shah V. Optimal brain MRI protocol for new neurological complaint. PLoS One. 2014; 9(10):e110803. PMID: 25343371; PMCID: PMC4208779.
  21. Langer C, Both M, Harders H, Lutz M, Eden M, Kühl C, Sattler B, Jansen O, Schaefer P, Frey N. Late enhanced computed tomography in Hypertrophic Cardiomyopathy enables accurate left-ventricular volumetry. Eur Radiol. 2015 Feb; 25(2):575-84. PMID: 25316053.
    View in: PubMed
  22. Schaefer PW, Pulli B, Copen WA, Hirsch JA, Leslie-Mazwi T, Schwamm LH, Wu O, González RG, Yoo AJ. Combining MRI with NIHSS thresholds to predict outcome in acute ischemic stroke: value for patient selection. AJNR Am J Neuroradiol. 2015 Feb; 36(2):259-64. PMID: 25258369; PMCID: PMC4462135.
  23. Timpone VM, Lev MH, Kamalian S, Morais LT, Franceschi AM, Souza L, Schaefer PW. Percentage insula ribbon infarction of >50% identifies patients likely to have poor clinical outcome despite small DWI infarct volume. AJNR Am J Neuroradiol. 2015 Jan; 36(1):40-5. PMID: 25190204.
    View in: PubMed
  24. Hakimelahi R, Vachha BA, Copen WA, Papini GD, He J, Higazi MM, Lev MH, Schaefer PW, Yoo AJ, Schwamm LH, González RG. Time and diffusion lesion size in major anterior circulation ischemic strokes. Stroke. 2014 Oct; 45(10):2936-41. PMID: 25190444.
    View in: PubMed
  25. Cho TA, Chi AS, Schaefer PW. Case 8-2014: A man with headache, vomiting, and diplopia. N Engl J Med. 2014 Jun 26; 370(26):2545. PMID: 24963586.
    View in: PubMed
  26. Hirsch JA, Barr RM, McGinty G, Nicola GN, Schaefer PW, Silva E, Manchikanti L. Affordable care 2014: a tale of two boards. J Neurointerv Surg. 2014 Nov; 6(9):718-20. PMID: 24962452.
    View in: PubMed
  27. Ginat DT, Swearingen B, Curry W, Cahill D, Madsen J, Schaefer PW. 3 Tesla intraoperative MRI for brain tumor surgery. J Magn Reson Imaging. 2014 Jun; 39(6):1357-65. PMID: 24921066.
    View in: PubMed
  28. Hirsch JA, Schaefer PW, Romero JM, Rabinov JD, Sanelli PC, Manchikanti L. Comparative effectiveness research. AJNR Am J Neuroradiol. 2014 Sep; 35(9):1677-80. PMID: 24874531.
    View in: PubMed
  29. Orru' E, Arenson RA, Schaefer PW, Mukherji SK, Yousem DM. Restriction of ACGME fellowships to candidates completing US and Canadian accredited residencies: level of support and expected consequences. J Am Coll Radiol. 2014 Aug; 11(8):796-801.e2. PMID: 24713500.
    View in: PubMed
  30. Cho TA, Chi AS, Schaefer PW, Louis DN. Case records of the Massachusetts General Hospital. Case 8-2014. A 29-year-old man with headache, vomiting, and diplopia. N Engl J Med. 2014 Mar 13; 370(11):1049-59. PMID: 24620869.
    View in: PubMed
  31. Ginat DT, Schaefer PW. Imaging guidelines and findings of extracranial glioblastoma. J Neurooncol. 2014 May; 118(1):9-18. PMID: 24557958.
    View in: PubMed
  32. Ginat DT, Walcott BP, Mordes D, Schaefer PW, Nahed B. Intracranial organizing hematoma with papillary endothelial hyperplasia features after resection and involved field radiotherapy for cerebellar juvenile pilocytic astrocytoma. Clin Imaging. 2014 May-Jun; 38(3):322-5. PMID: 24456989.
    View in: PubMed
  33. Borja MJ, Schaefer PW, Boulter DJ. Case of the season: dural arteriovenous fistula mimicking a bithalamic neoplasm or viral encephalitis. Semin Roentgenol. 2014 Jan; 49(1):4-9. PMID: 24342671.
    View in: PubMed
  34. Mehan WA, Romero JM, Hirsch JA, Sabbag DJ, Gonzalez RG, Heit JJ, Schaefer PW. Unruptured intracranial aneurysms conservatively followed with serial CT angiography: could morphology and growth predict rupture? J Neurointerv Surg. 2014 Dec; 6(10):761-6. PMID: 24275611.
    View in: PubMed
  35. Schaefer PW. Letter from the guest editor: brain imaging. Semin Roentgenol. 2014 Jan; 49(1):3. PMID: 24342670.
    View in: PubMed
  36. Boulter DJ, Schaefer PW. Stroke and stroke mimics: a pattern-based approach. Semin Roentgenol. 2014 Jan; 49(1):22-38. PMID: 24342673.
    View in: PubMed
  37. Hirsch JA, Donovan WD, Barr RM, Nicola GN, Rosman DA, Schaefer PW, Manchikanti L. The Independent Payment Advisory Board. AJNR Am J Neuroradiol. 2014 Jun; 35(6):1066-9. PMID: 24136648.
    View in: PubMed
  38. Wintermark M, Sanelli PC, Albers GW, Bello JA, Derdeyn CP, Hetts SW, Johnson MH, Kidwell CS, Lev MH, Liebeskind DS, Rowley HA, Schaefer PW, Sunshine JL, Zaharchuk G, Meltzer CC. Imaging recommendations for acute stroke and transient ischemic attack patients: a joint statement by the American Society of Neuroradiology, the American College of Radiology and the Society of NeuroInterventional Surgery. J Am Coll Radiol. 2013 Nov; 10(11):828-32. PMID: 23948676; PMCID: PMC4142765.
  39. Wintermark M, Sanelli PC, Albers GW, Bello J, Derdeyn C, Hetts SW, Johnson MH, Kidwell C, Lev MH, Liebeskind DS, Rowley H, Schaefer PW, Sunshine JL, Zaharchuk G, Meltzer CC. Imaging recommendations for acute stroke and transient ischemic attack patients: A joint statement by the American Society of Neuroradiology, the American College of Radiology, and the Society of NeuroInterventional Surgery. AJNR Am J Neuroradiol. 2013 Nov-Dec; 34(11):E117-27. PMID: 23907247; PMCID: PMC4072500.
  40. Wintermark M, Albers GW, Broderick JP, Demchuk AM, Fiebach JB, Fiehler J, Grotta JC, Houser G, Jovin TG, Lees KR, Lev MH, Liebeskind DS, Luby M, Muir KW, Parsons MW, von Kummer R, Wardlaw JM, Wu O, Yoo AJ, Alexandrov AV, Alger JR, Aviv RI, Bammer R, Baron JC, Calamante F, Campbell BC, Carpenter TC, Christensen S, Copen WA, Derdeyn CP, Haley EC, Khatri P, Kudo K, Lansberg MG, Latour LL, Lee TY, Leigh R, Lin W, Lyden P, Mair G, Menon BK, Michel P, Mikulik R, Nogueira RG, Ostergaard L, Pedraza S, Riedel CH, Rowley HA, Sanelli PC, Sasaki M, Saver JL, Schaefer PW, Schellinger PD, Tsivgoulis G, Wechsler LR, White PM, Zaharchuk G, Zaidat OO, Davis SM, Donnan GA, Furlan AJ, Hacke W, Kang DW, Kidwell C, Thijs VN, Thomalla G, Warach SJ. Acute Stroke Imaging Research Roadmap II. Stroke. 2013 Sep; 44(9):2628-39. PMID: 23860298; PMCID: PMC4040226.
  41. Ginat DT, Smith ER, Robertson RL, Scott RM, Schaefer PW. Imaging after direct and indirect extracranial-intracranial bypass surgery. AJR Am J Roentgenol. 2013 Jul; 201(1):W124-32. PMID: 23789684.
    View in: PubMed
  42. Hirsch JA, Donovan WD, Nicola GN, Barr RM, Schaefer PW, Silva E. Alphabet soup: our government "in-action". AJNR Am J Neuroradiol. 2013 Oct; 34(10):1887-9. PMID: 23811971.
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  43. González RG, Copen WA, Schaefer PW, Lev MH, Pomerantz SR, Rapalino O, Chen JW, Hunter GJ, Romero JM, Buchbinder BR, Larvie M, Hirsch JA, Gupta R. The Massachusetts General Hospital acute stroke imaging algorithm: an experience and evidence based approach. J Neurointerv Surg. 2013 May; 5 Suppl 1:i7-12. PMID: 23493340; PMCID: PMC3623036.
  44. Nejad SH, Schaefer PW, Bajwa EK, Smith FA. Case records of the Massachusetts General Hospital. Case 39-2012. A 55-year-old man with alcoholism, recurrent seizures, and agitation. N Engl J Med. 2012 Dec 20; 367(25):2428-34. PMID: 23252529.
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  45. Sheridan RL, Schaefer PW, Whalen M, Fagan S, Stoddard FJ, Schneider JC, McConkey B, Cancio LC. Case records of the Massachusetts General Hospital. Case 36-2012. Recovery of a 16-year-old girl from trauma and burns after a car accident. N Engl J Med. 2012 Nov 22; 367(21):2027-37. PMID: 23171100.
    View in: PubMed
  46. Hakimelahi R, Yoo AJ, He J, Schwamm LH, Lev MH, Schaefer PW, González RG. Rapid identification of a major diffusion/perfusion mismatch in distal internal carotid artery or middle cerebral artery ischemic stroke. BMC Neurol. 2012 Nov 05; 12:132. PMID: 23121836; PMCID: PMC3519648.
  47. Deipolyi AR, Wu O, Macklin EA, Schaefer PW, Schwamm LH, Gilberto Gonzalez R, Copen WA. Reliability of cerebral blood volume maps as a substitute for diffusion-weighted imaging in acute ischemic stroke. J Magn Reson Imaging. 2012 Nov; 36(5):1083-7. PMID: 22761110; PMCID: PMC4110961.
  48. Ginat DT, Kelly HR, Schaefer PW, Davidson CJ, Curry W. Recurrent scalp metastasis from glioblastoma following resection. Clin Neurol Neurosurg. 2013 Apr; 115(4):461-3. PMID: 22727368.
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  49. Ginat DT, Mangla R, Yeaney G, Schaefer PW, Wang H. Correlation between dynamic contrast-enhanced perfusion MRI relative cerebral blood volume and vascular endothelial growth factor expression in meningiomas. Acad Radiol. 2012 Aug; 19(8):986-90. PMID: 22591719.
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  50. Payabvash S, Souza LC, Kamalian S, Wang Y, Passanese J, Kamalian S, Fung SH, Halpern EF, Schaefer PW, Gonzalez RG, Furie KL, Lev MH. Location-weighted CTP analysis predicts early motor improvement in stroke: a preliminary study. Neurology. 2012 Jun 05; 78(23):1853-9. PMID: 22573641; PMCID: PMC3369521.
  51. Yoo AJ, Chaudhry ZA, Nogueira RG, Lev MH, Schaefer PW, Schwamm LH, Hirsch JA, González RG. Infarct volume is a pivotal biomarker after intra-arterial stroke therapy. Stroke. 2012 May; 43(5):1323-30. PMID: 22426317.
    View in: PubMed
  52. Wu O, Benner T, Roccatagliata L, Zhu M, Schaefer PW, Sorensen AG, Singhal AB. Evaluating effects of normobaric oxygen therapy in acute stroke with MRI-based predictive models. Med Gas Res. 2012 Mar 09; 2(1):5. PMID: 22404875; PMCID: PMC3388462.
  53. Souza LC, Yoo AJ, Chaudhry ZA, Payabvash S, Kemmling A, Schaefer PW, Hirsch JA, Furie KL, González RG, Nogueira RG, Lev MH. Malignant CTA collateral profile is highly specific for large admission DWI infarct core and poor outcome in acute stroke. AJNR Am J Neuroradiol. 2012 Aug; 33(7):1331-6. PMID: 22383238; PMCID: PMC3888794.
  54. Gupta AC, Schaefer PW, Chaudhry ZA, Leslie-Mazwi TM, Chandra RV, González RG, Hirsch JA, Yoo AJ. Interobserver reliability of baseline noncontrast CT Alberta Stroke Program Early CT Score for intra-arterial stroke treatment selection. AJNR Am J Neuroradiol. 2012 Jun; 33(6):1046-9. PMID: 22322602.
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  55. Tritos NA, Schaefer PW, Stein TD. Case records of the Massachusetts General Hospital. Case 40-2011. A 52-year-old man with weakness, infections, and enlarged adrenal glands. N Engl J Med. 2011 Dec 29; 365(26):2520-30. PMID: 22204728.
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  56. Kamalian S, Kamalian S, Konstas AA, Maas MB, Payabvash S, Pomerantz SR, Schaefer PW, Furie KL, González RG, Lev MH. CT perfusion mean transit time maps optimally distinguish benign oligemia from true "at-risk" ischemic penumbra, but thresholds vary by postprocessing technique. AJNR Am J Neuroradiol. 2012 Mar; 33(3):545-9. PMID: 22194372; PMCID: PMC3746025.
  57. Pulli B, Schaefer PW, Hakimelahi R, Chaudhry ZA, Lev MH, Hirsch JA, González RG, Yoo AJ. Acute ischemic stroke: infarct core estimation on CT angiography source images depends on CT angiography protocol. Radiology. 2012 Feb; 262(2):593-604. PMID: 22187626; PMCID: PMC3267077.
  58. Souza LC, Payabvash S, Wang Y, Kamalian S, Schaefer P, Gonzalez RG, Furie KL, Lev MH. Admission CT perfusion is an independent predictor of hemorrhagic transformation in acute stroke with similar accuracy to DWI. Cerebrovasc Dis. 2012; 33(1):8-15. PMID: 22143195; PMCID: PMC3250646.
  59. Delgado Almandoz JE, Kelly HR, Schaefer PW, Brouwers HB, Yoo AJ, Stone MJ, Goldstein JN, Rosand J, Lev MH, Gonzalez RG, Romero JM. CT angiography spot sign predicts in-hospital mortality in patients with secondary intracerebral hemorrhage. J Neurointerv Surg. 2012 Nov; 4(6):442-7. PMID: 22003048; PMCID: PMC3684202.
  60. Yoo AJ, Hu R, Hakimelahi R, Lev MH, Nogueira RG, Hirsch JA, González RG, Schaefer PW. CT angiography source images acquired with a fast-acquisition protocol overestimate infarct core on diffusion weighted images in acute ischemic stroke. J Neuroimaging. 2012 Oct; 22(4):329-35. PMID: 21848682; PMCID: PMC3248622.
  61. Kamalian S, Kamalian S, Maas MB, Goldmacher GV, Payabvash S, Akbar A, Schaefer PW, Furie KL, Gonzalez RG, Lev MH. CT cerebral blood flow maps optimally correlate with admission diffusion-weighted imaging in acute stroke but thresholds vary by postprocessing platform. Stroke. 2011 Jul; 42(7):1923-8. PMID: 21546490; PMCID: PMC3125441.
  62. Copen WA, Schaefer PW, Wu O. MR perfusion imaging in acute ischemic stroke. Neuroimaging Clin N Am. 2011 May; 21(2):259-83, x. PMID: 21640299; PMCID: PMC3135980.
  63. Fung SH, Roccatagliata L, Gonzalez RG, Schaefer PW. MR diffusion imaging in ischemic stroke. Neuroimaging Clin N Am. 2011 May; 21(2):345-77, xi. PMID: 21640304.
    View in: PubMed
  64. Schaefer PW. Imaging acute stroke is rapidly evolving. Neuroimaging Clin N Am. 2011 May; 21(2):xv. PMID: 21640294.
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  65. Payabvash S, Souza LC, Wang Y, Schaefer PW, Furie KL, Halpern EF, Gonzalez RG, Lev MH. Regional ischemic vulnerability of the brain to hypoperfusion: the need for location specific computed tomography perfusion thresholds in acute stroke patients. Stroke. 2011 May; 42(5):1255-60. PMID: 21493917; PMCID: PMC3090217.
  66. Mui K, Yoo AJ, Verduzco L, Copen WA, Hirsch JA, González RG, Schaefer PW. Cerebral blood flow thresholds for tissue infarction in patients with acute ischemic stroke treated with intra-arterial revascularization therapy depend on timing of reperfusion. AJNR Am J Neuroradiol. 2011 May; 32(5):846-51. PMID: 21474633.
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  67. Delgado Almandoz JE, Su HS, Schaefer PW, Goldstein JN, Pomerantz SR, Lev MH, González RG, Romero JM. Frequency of adequate contrast opacification of the major intracranial venous structures with CT angiography in the setting of intracerebral hemorrhage: comparison of 16- and 64-section CT angiography techniques. AJNR Am J Neuroradiol. 2011 May; 32(5):839-45. PMID: 21349959; PMCID: PMC3691005.
  68. Ly KI, Fintelmann F, Forghani R, Schaefer PW, Hochberg EP, Hochberg FH. Novel diagnostic approaches in Bing-Neel syndrome. Clin Lymphoma Myeloma Leuk. 2011 Feb; 11(1):180-3. PMID: 21856555.
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  69. Kunst MM, Schaefer PW. Ischemic stroke. Radiol Clin North Am. 2011 Jan; 49(1):1-26. PMID: 21111127.
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  70. Utz AL, Schaefer PW, Snuderl M. Case records of the Massachusetts General Hospital. Case 20-2010. A 32-year-old woman with oligomenorrhea and infertility. N Engl J Med. 2010 Jul 08; 363(2):178-86. PMID: 20647214.
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  71. Yoo AJ, Barak ER, Copen WA, Kamalian S, Gharai LR, Pervez MA, Schwamm LH, González RG, Schaefer PW. Combining acute diffusion-weighted imaging and mean transmit time lesion volumes with National Institutes of Health Stroke Scale Score improves the prediction of acute stroke outcome. Stroke. 2010 Aug; 41(8):1728-35. PMID: 20595665.
    View in: PubMed
  72. Delgado Almandoz JE, Schaefer PW, Goldstein JN, Rosand J, Lev MH, González RG, Romero JM. Practical scoring system for the identification of patients with intracerebral hemorrhage at highest risk of harboring an underlying vascular etiology: the Secondary Intracerebral Hemorrhage Score. AJNR Am J Neuroradiol. 2010 Oct; 31(9):1653-60. PMID: 20581068; PMCID: PMC3682824.
  73. Yoo AJ, Hakimelahi R, Rost NS, Schaefer PW, Hirsch JA, González RG, Rabinov JD. Diffusion weighted imaging reversibility in the brainstem following successful recanalization of acute basilar artery occlusion. J Neurointerv Surg. 2010 Sep; 2(3):195-7. PMID: 21990621.
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  74. Turkbey B, Akpinar E. CT angiography in head and neck trauma. Radiology. 2010 Jun; 255(3):1008-9; author reply 1009. PMID: 20501738.
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  75. Ferreira RM, Lev MH, Goldmakher GV, Kamalian S, Schaefer PW, Furie KL, Gonzalez RG, Sanelli PC. Arterial input function placement for accurate CT perfusion map construction in acute stroke. AJR Am J Roentgenol. 2010 May; 194(5):1330-6. PMID: 20410422; PMCID: PMC3744327.
  76. Delgado Almandoz JE, Kelly HR, Schaefer PW, Lev MH, Gonzalez RG, Romero JM. Prevalence of traumatic dural venous sinus thrombosis in high-risk acute blunt head trauma patients evaluated with multidetector CT venography. Radiology. 2010 May; 255(2):570-7. PMID: 20413766.
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  77. Yoo AJ, Romero J, Hakimelahi R, Nogueira RG, Rabinov JD, Pryor JC, González RG, Hirsch JA, Schaefer PW. Predictors of functional outcome vary by the hemisphere of involvement in major ischemic stroke treated with intra-arterial therapy: a retrospective cohort study. BMC Neurol. 2010 Apr 23; 10:25. PMID: 20416087; PMCID: PMC2873321.
  78. González RG, Hakimelahi R, Schaefer PW, Roccatagliata L, Sorensen AG, Singhal AB. Stability of large diffusion/perfusion mismatch in anterior circulation strokes for 4 or more hours. BMC Neurol. 2010 Feb 10; 10:13. PMID: 20146800; PMCID: PMC2830931.
  79. Ozsunar Y, Mullins ME, Kwong K, Hochberg FH, Ament C, Schaefer PW, Gonzalez RG, Lev MH. Glioma recurrence versus radiation necrosis? A pilot comparison of arterial spin-labeled, dynamic susceptibility contrast enhanced MRI, and FDG-PET imaging. Acad Radiol. 2010 Mar; 17(3):282-90. PMID: 20060750.
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  80. Delgado Almandoz JE, Schaefer PW, Kelly HR, Lev MH, Gonzalez RG, Romero JM. Multidetector CT angiography in the evaluation of acute blunt head and neck trauma: a proposed acute craniocervical trauma scoring system. Radiology. 2010 Jan; 254(1):236-44. PMID: 20019135.
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  81. Abujudeh HH, Rolls H, Kaewlai R, Agarwal S, Gebreananya ZA, Saini S, Schaefer PW, Kay J. Retrospective assessment of prevalence of nephrogenic systemic fibrosis (NSF) after implementation of a new guideline for the use of gadobenate dimeglumine as a sole contrast agent for magnetic resonance examination in renally impaired patients. J Magn Reson Imaging. 2009 Dec; 30(6):1335-40. PMID: 19937927.
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  82. Delgado Almandoz JE, Yoo AJ, Stone MJ, Schaefer PW, Oleinik A, Brouwers HB, Goldstein JN, Rosand J, Lev MH, Gonzalez RG, Romero JM. The spot sign score in primary intracerebral hemorrhage identifies patients at highest risk of in-hospital mortality and poor outcome among survivors. Stroke. 2010 Jan; 41(1):54-60. PMID: 19910545; PMCID: PMC4181338.
  83. Smith WS, Lev MH, English JD, Camargo EC, Chou M, Johnston SC, Gonzalez G, Schaefer PW, Dillon WP, Koroshetz WJ, Furie KL. Significance of large vessel intracranial occlusion causing acute ischemic stroke and TIA. Stroke. 2009 Dec; 40(12):3834-40. PMID: 19834014; PMCID: PMC2796543.
  84. Delgado Almandoz JE, Yoo AJ, Stone MJ, Schaefer PW, Goldstein JN, Rosand J, Oleinik A, Lev MH, Gonzalez RG, Romero JM. Systematic characterization of the computed tomography angiography spot sign in primary intracerebral hemorrhage identifies patients at highest risk for hematoma expansion: the spot sign score. Stroke. 2009 Sep; 40(9):2994-3000. PMID: 19574553; PMCID: PMC3498504.
  85. Sims JR, Gharai LR, Schaefer PW, Vangel M, Rosenthal ES, Lev MH, Schwamm LH. ABC/2 for rapid clinical estimate of infarct, perfusion, and mismatch volumes. Neurology. 2009 Jun 16; 72(24):2104-10. PMID: 19528517; PMCID: PMC2697964.
  86. Schaefer PW, Mui K, Kamalian S, Nogueira RG, Gonzalez RG, Lev MH. Avoiding "pseudo-reversibility" of CT-CBV infarct core lesions in acute stroke patients after thrombolytic therapy: the need for algorithmically "delay-corrected" CT perfusion map postprocessing software. Stroke. 2009 Aug; 40(8):2875-8. PMID: 19520995.
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  87. Yoo AJ, Verduzco LA, Schaefer PW, Hirsch JA, Rabinov JD, González RG. MRI-based selection for intra-arterial stroke therapy: value of pretreatment diffusion-weighted imaging lesion volume in selecting patients with acute stroke who will benefit from early recanalization. Stroke. 2009 Jun; 40(6):2046-54. PMID: 19359641; PMCID: PMC2709767.
  88. Delgado Almandoz JE, Schaefer PW, Forero NP, Falla JR, Gonzalez RG, Romero JM. Diagnostic accuracy and yield of multidetector CT angiography in the evaluation of spontaneous intraparenchymal cerebral hemorrhage. AJNR Am J Neuroradiol. 2009 Jun; 30(6):1213-21. PMID: 19342546.
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  89. Singhal AB, Kimberly WT, Schaefer PW, Hedley-Whyte ET. Case records of the Massachusetts General Hospital. Case 8-2009. A 36-year-old woman with headache, hypertension, and seizure 2 weeks post partum. N Engl J Med. 2009 Mar 12; 360(11):1126-37. PMID: 19279345.
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  90. Fintelmann F, Forghani R, Schaefer PW, Hochberg EP, Hochberg FH. Bing-Neel Syndrome revisited. Clin Lymphoma Myeloma. 2009 Mar; 9(1):104-6. PMID: 19362988.
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  91. Romero JM, Babiarz LS, Forero NP, Murphy EK, Schaefer PW, Gonzalez RG, Lev MH. Arterial wall enhancement overlying carotid plaque on CT angiography correlates with symptoms in patients with high grade stenosis. Stroke. 2009 May; 40(5):1894-6. PMID: 19182087.
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  92. Babiarz LS, Romero JM, Murphy EK, Brobeck B, Schaefer PW, González RG, Lev MH. Contrast-enhanced MR angiography is not more accurate than unenhanced 2D time-of-flight MR angiography for determining > or = 70% internal carotid artery stenosis. AJNR Am J Neuroradiol. 2009 Apr; 30(4):761-8. PMID: 19164440.
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  93. Copen WA, Rezai Gharai L, Barak ER, Schwamm LH, Wu O, Kamalian S, Gonzalez RG, Schaefer PW. Existence of the diffusion-perfusion mismatch within 24 hours after onset of acute stroke: dependence on proximal arterial occlusion. Radiology. 2009 Mar; 250(3):878-86. PMID: 19164120.
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  94. Romero JM, Artunduaga M, Forero NP, Delgado J, Sarfaraz K, Goldstein JN, Gonzalez RG, Schaefer PW. Accuracy of CT angiography for the diagnosis of vascular abnormalities causing intraparenchymal hemorrhage in young patients. Emerg Radiol. 2009 May; 16(3):195-201. PMID: 19132425.
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  95. Schaefer PW, Barak ER, Kamalian S, Gharai LR, Schwamm L, Gonzalez RG, Lev MH. Quantitative assessment of core/penumbra mismatch in acute stroke: CT and MR perfusion imaging are strongly correlated when sufficient brain volume is imaged. Stroke. 2008 Nov; 39(11):2986-92. PMID: 18723425.
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  96. Schaefer PW, Yoo AJ, Bell D, Barak ER, Romero JM, Nogueira RG, Lev MH, Schwamm LH, Gonzalez RG, Hirsch JA. CT angiography-source image hypoattenuation predicts clinical outcome in posterior circulation strokes treated with intra-arterial therapy. Stroke. 2008 Nov; 39(11):3107-9. PMID: 18703807.
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  97. Hirsch MS, DeMaria A, Schaefer PW, Branda JA. Case records of the Massachusetts General Hospital. Case 22-2008. A 52-year-old woman with fever and confusion. N Engl J Med. 2008 Jul 17; 359(3):294-303. PMID: 18635435.
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  98. Rosenthal ES, Schwamm LH, Roccatagliata L, Coutts SB, Demchuk AM, Schaefer PW, Gonzalez RG, Hill MD, Halpern EF, Lev MH. Role of recanalization in acute stroke outcome: rationale for a CT angiogram-based "benefit of recanalization" model. AJNR Am J Neuroradiol. 2008 Sep; 29(8):1471-5. PMID: 18599577.
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  99. Torres-Mozqueda F, He J, Yeh IB, Schwamm LH, Lev MH, Schaefer PW, González RG. An acute ischemic stroke classification instrument that includes CT or MR angiography: the Boston Acute Stroke Imaging Scale. AJNR Am J Neuroradiol. 2008 Jun; 29(6):1111-7. PMID: 18467521.
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  100. Ay H, Arsava EM, Rosand J, Furie KL, Singhal AB, Schaefer PW, Wu O, Gonzalez RG, Koroshetz WJ, Sorensen AG. Severity of leukoaraiosis and susceptibility to infarct growth in acute stroke. Stroke. 2008 May; 39(5):1409-13. PMID: 18340093.
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  101. Mamourian A, Bird R, Schaefer PW, Atlas SW, Dillon WP, Provenzale JM, Truwit CL, Chakeres DW. Aneurysm clip. J Neurosurg. 2007 Dec; 107(6):1278-9. PMID: 18080362.
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  102. Singhal AB, Ratai E, Benner T, Vangel M, Lee V, Koroshetz WJ, Schaefer PW, Sorensen AG, Gonzalez RG. Magnetic resonance spectroscopy study of oxygen therapy in ischemic stroke. Stroke. 2007 Oct; 38(10):2851-4. PMID: 17761914.
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  103. Schaefer PW, Miller JC, Singhal AB, Thrall JH, Lee SI. Headache: when is neurologic imaging indicated? J Am Coll Radiol. 2007 Aug; 4(8):566-9. PMID: 17660123.
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  104. Nemeth AJ, Henson JW, Mullins ME, Gonzalez RG, Schaefer PW. Improved detection of skull metastasis with diffusion-weighted MR imaging. AJNR Am J Neuroradiol. 2007 Jun-Jul; 28(6):1088-92. PMID: 17569964.
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  105. Bouchardy C, Fioretta G, Verkooijen HM, Vlastos G, Schaefer P, Delaloye JF, Neyroud-Caspar I, Balmer Majno S, Wespi Y, Forni M, Chappuis P, Sappino AP, Rapiti E. Recent increase of breast cancer incidence among women under the age of forty. Br J Cancer. 2007 Jun 04; 96(11):1743-6. PMID: 17533391; PMCID: PMC2359920.
  106. Greer DM, Schaefer PW, Plotkin SR, Hasserjian RP, Steere AC. Case records of the Massachusetts General Hospital. Case 11-2007. A 59-year-old man with neck pain, weakness in the arms, and cranial-nerve palsies. N Engl J Med. 2007 Apr 12; 356(15):1561-70. PMID: 17429088.
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  107. Lev MH, Gonzalez RG, Schaefer PW, Koroshetz WJ, Dillon WP, Wintermark M. Cerebral blood flow thresholds in acute stroke triage. Stroke. 2006 Sep; 37(9):2202; author reply 2203. PMID: 16888254.
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  108. Buckner JC, Ballman K, Schaefer P, Furth AF, Giannini C, Scheithauer BW, Galanis E, Jaeckle KA. NCCTG 96-94-53: Clinical variables associated with overall survival (OS), progression-free survival (PFS), 6 month progression-free survival (PFS6), immediate progression (ImmProg), and response in patients enrolled in recurrent glioma clinical trials. J Clin Oncol. 2006 Jun 20; 24(18_suppl):1520. PMID: 27952275.
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  109. Schaefer PW, Copen WA, Lev MH, Gonzalez RG. Diffusion-weighted imaging in acute stroke. Magn Reson Imaging Clin N Am. 2006 May; 14(2):141-68. PMID: 16873008.
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  110. Schaefer PW, Roccatagliata L, Ledezma C, Hoh B, Schwamm LH, Koroshetz W, Gonzalez RG, Lev MH. First-pass quantitative CT perfusion identifies thresholds for salvageable penumbra in acute stroke patients treated with intra-arterial therapy. AJNR Am J Neuroradiol. 2006 Jan; 27(1):20-5. PMID: 16418350.
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  111. Mullins ME, Lev MH, Schellingerhout D, Gonzalez RG, Schaefer PW. Intracranial hemorrhage complicating acute stroke: how common is hemorrhagic stroke on initial head CT scan and how often is initial clinical diagnosis of acute stroke eventually confirmed? AJNR Am J Neuroradiol. 2005 Oct; 26(9):2207-12. PMID: 16219823.
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  112. Mullins ME, Barest GD, Schaefer PW, Hochberg FH, Gonzalez RG, Lev MH. Radiation necrosis versus glioma recurrence: conventional MR imaging clues to diagnosis. AJNR Am J Neuroradiol. 2005 Sep; 26(8):1967-72. PMID: 16155144.
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  113. Alberts SR, Foster NR, Morton RF, Kugler J, Schaefer P, Wiesenfeld M, Fitch TR, Steen P, Kim GP, Gill S. PS-341 and gemcitabine in patients with metastatic pancreatic adenocarcinoma: a North Central Cancer Treatment Group (NCCTG) randomized phase II study. Ann Oncol. 2005 Oct; 16(10):1654-61. PMID: 16085692.
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  114. Schaefer PW, Copen WA, Lev MH, Gonzalez RG. Diffusion-weighted imaging in acute stroke. Neuroimaging Clin N Am. 2005 Aug; 15(3):503-30, ix-x. PMID: 16360586.
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  115. Hammoud DA, Yousem DM, Schaefer PW. Neuroradiology fellowship match: year 4 applicants' perceptions. J Am Coll Radiol. 2005 Aug; 2(8):696-700. PMID: 17411908.
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  116. Hollander H, Schaefer PW, Hedley-Whyte ET. Case records of the Massachusetts General Hospital. Case 22-2005. An 81-year-old man with cough, fever, and altered mental status. N Engl J Med. 2005 Jul 21; 353(3):287-95. PMID: 16034015.
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  117. Gaviani P, Schwartz RB, Hedley-Whyte ET, Ligon KL, Robicsek A, Schaefer P, Henson JW. Diffusion-weighted imaging of fungal cerebral infection. AJNR Am J Neuroradiol. 2005 May; 26(5):1115-21. PMID: 15891169.
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  118. Singhal AB, Benner T, Roccatagliata L, Koroshetz WJ, Schaefer PW, Lo EH, Buonanno FS, Gonzalez RG, Sorensen AG. A pilot study of normobaric oxygen therapy in acute ischemic stroke. Stroke. 2005 Apr; 36(4):797-802. PMID: 15761201.
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  119. Schwamm LH, Rosenthal ES, Hirshberg A, Schaefer PW, Little EA, Kvedar JC, Petkovska I, Koroshetz WJ, Levine SR. Virtual TeleStroke support for the emergency department evaluation of acute stroke. Acad Emerg Med. 2004 Nov; 11(11):1193-7. PMID: 15528584.
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  120. Mullins ME, Grant PE, Wang B, Gonzalez RG, Schaefer PW. Parenchymal abnormalities associated with cerebral venous sinus thrombosis: assessment with diffusion-weighted MR imaging. AJNR Am J Neuroradiol. 2004 Nov-Dec; 25(10):1666-75. PMID: 15569728.
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  121. Schaefer PW, Huisman TA, Sorensen AG, Gonzalez RG, Schwamm LH. Diffusion-weighted MR imaging in closed head injury: high correlation with initial glasgow coma scale score and score on modified Rankin scale at discharge. Radiology. 2004 Oct; 233(1):58-66. PMID: 15304663.
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  122. Schaefer PW, Hassankhani A, Putman C, Sorensen AG, Schwamm L, Koroshetz W, Gonzalez RG. Characterization and evolution of diffusion MR imaging abnormalities in stroke patients undergoing intra-arterial thrombolysis. AJNR Am J Neuroradiol. 2004 Jun-Jul; 25(6):951-7. PMID: 15205129.
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  123. Ozsunar Y, Grant PE, Huisman TA, Schaefer PW, Wu O, Sorensen AG, Koroshetz WJ, Gonzalez RG. Evolution of water diffusion and anisotropy in hyperacute stroke: significant correlation between fractional anisotropy and T2. AJNR Am J Neuroradiol. 2004 May; 25(5):699-705. PMID: 15140707.
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  124. Huisman TA, Schwamm LH, Schaefer PW, Koroshetz WJ, Shetty-Alva N, Ozsunar Y, Wu O, Sorensen AG. Diffusion tensor imaging as potential biomarker of white matter injury in diffuse axonal injury. AJNR Am J Neuroradiol. 2004 Mar; 25(3):370-6. PMID: 15037457.
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  125. Lev MH, Ozsunar Y, Henson JW, Rasheed AA, Barest GD, Harsh GR, Fitzek MM, Chiocca EA, Rabinov JD, Csavoy AN, Rosen BR, Hochberg FH, Schaefer PW, Gonzalez RG. Glial tumor grading and outcome prediction using dynamic spin-echo MR susceptibility mapping compared with conventional contrast-enhanced MR: confounding effect of elevated rCBV of oligodendrogliomas [corrected]. AJNR Am J Neuroradiol. 2004 Feb; 25(2):214-21. PMID: 14970020.
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  126. Friedmann AM, Tarbell NJ, Schaefer PW, Hoch BL. Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 4-2004. A nine-month-old boy with an orbital rhabdomyosarcoma. N Engl J Med. 2004 Jan 29; 350(5):494-502. PMID: 14749459.
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  127. Wu O, Østergaard L, Koroshetz WJ, Schwamm LH, O'Donnell J, Schaefer PW, Rosen BR, Weisskoff RM, Sorensen AG. Effects of tracer arrival time on flow estimates in MR perfusion-weighted imaging. Magn Reson Med. 2003 Oct; 50(4):856-64. PMID: 14523973.
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  128. Schaefer PW, Ozsunar Y, He J, Hamberg LM, Hunter GJ, Sorensen AG, Koroshetz WJ, Gonzalez RG. Assessing tissue viability with MR diffusion and perfusion imaging. AJNR Am J Neuroradiol. 2003 Mar; 24(3):436-43. PMID: 12637294.
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  129. Huisman TA, Sorensen AG, Hergan K, Gonzalez RG, Schaefer PW. Diffusion-weighted imaging for the evaluation of diffuse axonal injury in closed head injury. J Comput Assist Tomogr. 2003 Jan-Feb; 27(1):5-11. PMID: 12544235.
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  130. Schaefer PW, Hunter GJ, He J, Hamberg LM, Sorensen AG, Schwamm LH, Koroshetz WJ, Gonzalez RG. Predicting cerebral ischemic infarct volume with diffusion and perfusion MR imaging. AJNR Am J Neuroradiol. 2002 Nov-Dec; 23(10):1785-94. PMID: 12427640.
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  131. Mullins ME, Schaefer PW, Sorensen AG, Halpern EF, Ay H, He J, Koroshetz WJ, Gonzalez RG. CT and conventional and diffusion-weighted MR imaging in acute stroke: study in 691 patients at presentation to the emergency department. Radiology. 2002 Aug; 224(2):353-60. PMID: 12147827.
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  132. Schaefer PW, Romero JM, Grant PE, Wu O, Sorensen AG, Koroshetz W, González RG. Diffusion magnetic resonance imaging of acute ischemic stroke. Semin Roentgenol. 2002 Jul; 37(3):219-29. PMID: 12226901.
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  133. Yu D, Schaefer PW, Rordorf G, González RG. Magnetic resonance angiography in acute stroke. Semin Roentgenol. 2002 Jul; 37(3):212-8. PMID: 12226900.
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  134. Schaefer PW, Romero JM, Grant PE, Wu O, Sorensen AG, Koroshetz W, González RG. Perfusion magnetic resonance imaging of acute ischemic stroke. Semin Roentgenol. 2002 Jul; 37(3):230-6. PMID: 12226902.
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  135. Romero J, Schaefer P, McDonald C, Schwamm L, González RG. Conventional magnetic resonance imaging of acute stroke. Semin Roentgenol. 2002 Jul; 37(3):206-11. PMID: 12226899.
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  136. Hergan K, Schaefer PW, Sorensen AG, Gonzalez RG, Huisman TA. Diffusion-weighted MRI in diffuse axonal injury of the brain. Eur Radiol. 2002 Oct; 12(10):2536-41. PMID: 12271396.
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  137. Romero JM, Schaefer PW, Grant PE, Becerra L, González RG. Diffusion MR imaging of acute ischemic stroke. Neuroimaging Clin N Am. 2002 Feb; 12(1):35-53. PMID: 11998252.
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  138. Ay H, Oliveira-Filho J, Buonanno FS, Schaefer PW, Furie KL, Chang YC, Rordorf G, Schwamm LH, Gonzalez RG, Koroshetz WJ. 'Footprints' of transient ischemic attacks: a diffusion-weighted MRI study. Cerebrovasc Dis. 2002; 14(3-4):177-86. PMID: 12403950.
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  139. Sanelli PC, Lev MH, Gonzalez RG, Schaefer PW. Unique linear and nodular MR enhancement pattern in schistosomiasis of the central nervous system: report of three patients. AJR Am J Roentgenol. 2001 Dec; 177(6):1471-4. PMID: 11717109.
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  140. Copen WA, Schwamm LH, González RG, Wu O, Harmath CB, Schaefer PW, Koroshetz WJ, Sorensen AG. Ischemic stroke: effects of etiology and patient age on the time course of the core apparent diffusion coefficient. Radiology. 2001 Oct; 221(1):27-34. PMID: 11568317.
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  141. Schaefer PW, Gonzalez RG, Hunter G, Wang B, Koroshetz WJ, Schwamm LH. Diagnostic value of apparent diffusion coefficient hyperintensity in selected patients with acute neurologic deficits. J Neuroimaging. 2001 Oct; 11(4):369-80. PMID: 11677876.
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  142. Grant PE, He J, Halpern EF, Wu O, Schaefer PW, Schwamm LH, Budzik RF, Sorensen AG, Koroshetz WJ, Gonzalez RG. Frequency and clinical context of decreased apparent diffusion coefficient reversal in the human brain. Radiology. 2001 Oct; 221(1):43-50. PMID: 11568319.
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  143. Greer DM, Schaefer PW, Schwamm LH. Unilateral temporal lobe stroke causing ischemic transient global amnesia: role for diffusion-weighted imaging in the initial evaluation. J Neuroimaging. 2001 Jul; 11(3):317-9. PMID: 11462302.
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  144. Schaefer PW. Applications of DWI in clinical neurology. J Neurol Sci. 2001 May 01; 186 Suppl 1:S25-35. PMID: 11334987.
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  145. Golomb MR, Durand ML, Schaefer PW, McDonald CT, Maia M, Schwamm LH. A case of immunotherapy-responsive eastern equine encephalitis with diffusion-weighted imaging. Neurology. 2001 Feb 13; 56(3):420-1. PMID: 11171919.
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  146. Sorensen AG, Patel S, Harmath C, Bridges S, Synnott J, Sievers A, Yoon YH, Lee EJ, Yang MC, Lewis RF, Harris GJ, Lev M, Schaefer PW, Buchbinder BR, Barest G, Yamada K, Ponzo J, Kwon HY, Gemmete J, Farkas J, Tievsky AL, Ziegler RB, Salhus MR, Weisskoff R. Comparison of diameter and perimeter methods for tumor volume calculation. J Clin Oncol. 2001 Jan 15; 19(2):551-7. PMID: 11208850.
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  147. Schaefer PW, Grant PE, Gonzalez RG. Diffusion-weighted MR imaging of the brain. Radiology. 2000 Nov; 217(2):331-45. PMID: 11058626.
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  148. Zaheer A, Ozsunar Y, Schaefer PW. Magnetic resonance imaging of cerebral hemorrhagic stroke. Top Magn Reson Imaging. 2000 Oct; 11(5):288-99. PMID: 11142627.
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  149. Schaefer PW. Diffusion-weighted imaging as a problem-solving tool in the evaluation of patients with acute strokelike syndromes. Top Magn Reson Imaging. 2000 Oct; 11(5):300-9. PMID: 11142628.
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  150. Krishnamoorthy KS, Soman TB, Takeoka M, Schaefer PW. Diffusion-weighted imaging in neonatal cerebral infarction: clinical utility and follow-up. J Child Neurol. 2000 Sep; 15(9):592-602. PMID: 11019790.
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  151. Oliveira-Filho J, Ay H, Schaefer PW, Buonanno FS, Chang Y, Gonzalez RG, Koroshetz WJ. Diffusion-weighted magnetic resonance imaging identifies the "clinically relevant" small-penetrator infarcts. Arch Neurol. 2000 Jul; 57(7):1009-14. PMID: 10891983.
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  152. Mohammadkhani M, Schaefer P, Koroshetz W, Hedley-Whyte ET. Mitral annulus calcareous brain emboli. Neurology. 2000 Feb 22; 54(4):817. PMID: 10690969.
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  153. Ay H, Oliveira-Filho J, Buonanno FS, Ezzeddine M, Schaefer PW, Rordorf G, Schwamm LH, Gonzalez RG, Koroshetz WJ. Diffusion-weighted imaging identifies a subset of lacunar infarction associated with embolic source. Stroke. 1999 Dec; 30(12):2644-50. PMID: 10582991.
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  154. Lev MH, Schaefer PW. Subarachnoid gadolinium enhancement mimicking subarachnoid hemorrhage on FLAIR MR images. Fluid-attenuated inversion recovery. AJR Am J Roentgenol. 1999 Nov; 173(5):1414-5. PMID: 10541135.
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  155. Greenberg SM, O'Donnell HC, Schaefer PW, Kraft E. MRI detection of new hemorrhages: potential marker of progression in cerebral amyloid angiopathy. Neurology. 1999 Sep 22; 53(5):1135-8. PMID: 10496283.
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  156. Ay H, Buonanno FS, Rordorf G, Schaefer PW, Schwamm LH, Wu O, Gonzalez RG, Yamada K, Sorensen GA, Koroshetz WJ. Normal diffusion-weighted MRI during stroke-like deficits. Neurology. 1999 Jun 10; 52(9):1784-92. PMID: 10371524.
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  157. Rordorf G, Koroshetz WJ, Copen WA, Gonzalez G, Yamada K, Schaefer PW, Schwamm LH, Ogilvy CS, Sorensen AG. Diffusion- and perfusion-weighted imaging in vasospasm after subarachnoid hemorrhage. Stroke. 1999 Mar; 30(3):599-605. PMID: 10066858.
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  158. González RG, Schaefer PW, Buonanno FS, Schwamm LH, Budzik RF, Rordorf G, Wang B, Sorensen AG, Koroshetz WJ. Diffusion-weighted MR imaging: diagnostic accuracy in patients imaged within 6 hours of stroke symptom onset. Radiology. 1999 Jan; 210(1):155-62. PMID: 9885601.
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  159. Schwamm LH, Koroshetz WJ, Sorensen AG, Wang B, Copen WA, Budzik R, Rordorf G, Buonanno FS, Schaefer PW, Gonzalez RG. Time course of lesion development in patients with acute stroke: serial diffusion- and hemodynamic-weighted magnetic resonance imaging. Stroke. 1998 Nov; 29(11):2268-76. PMID: 9804633.
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  160. Ay H, Buonanno FS, Schaefer PW, Le DA, Wang B, Gonzalez RG, Koroshetz WJ. Posterior leukoencephalopathy without severe hypertension: utility of diffusion-weighted MRI. Neurology. 1998 Nov; 51(5):1369-76. PMID: 9818862.
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  161. Kothare SV, Ebb DH, Rosenberger PB, Buonanno F, Schaefer PW, Krishnamoorthy KS. Acute confusion and mutism as a presentation of thalamic strokes secondary to deep cerebral venous thrombosis. J Child Neurol. 1998 Jun; 13(6):300-3. PMID: 9660519.
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  162. Rordorf G, Koroshetz WJ, Copen WA, Cramer SC, Schaefer PW, Budzik RF, Schwamm LH, Buonanno F, Sorensen AG, Gonzalez G. Regional ischemia and ischemic injury in patients with acute middle cerebral artery stroke as defined by early diffusion-weighted and perfusion-weighted MRI. Stroke. 1998 May; 29(5):939-43. PMID: 9596239.
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  163. Moayeri NN, Henson JW, Schaefer PW, Zervas NT. Spinal dural enhancement on magnetic resonance imaging associated with spontaneous intracranial hypotension. Report of three cases and review of the literature. J Neurosurg. 1998 May; 88(5):912-8. PMID: 9576264.
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  164. Hunter GJ, Hamberg LM, Ponzo JA, Huang-Hellinger FR, Morris PP, Rabinov J, Farkas J, Lev MH, Schaefer PW, Ogilvy CS, Schwamm L, Buonanno FS, Koroshetz WJ, Wolf GL, González RG. Assessment of cerebral perfusion and arterial anatomy in hyperacute stroke with three-dimensional functional CT: early clinical results. AJNR Am J Neuroradiol. 1998 Jan; 19(1):29-37. PMID: 9432154.
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  165. Kieff DA, Boey H, Schaefer PW, Goodman M, Joseph MP. Isolated neurosarcoidosis presenting as anosmia and visual changes. Otolaryngol Head Neck Surg. 1997 Dec; 117(6):S183-6. PMID: 9419143.
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  166. Mehta A, Teoh SK, Schaefer PW, Chew FS. Cerebral schistosomiasis. AJR Am J Roentgenol. 1997 May; 168(5):1322. PMID: 9129435.
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  167. Schaefer PW, Buonanno FS, Gonzalez RG, Schwamm LH. Diffusion-weighted imaging discriminates between cytotoxic and vasogenic edema in a patient with eclampsia. Stroke. 1997 May; 28(5):1082-5. PMID: 9158653.
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  168. Provenzale JM, Schaefer P, Traweek ST, Ferry J, Moore JO, Friedman AH, McLendon RE. Craniocerebral plasmacytoma: MR features. AJNR Am J Neuroradiol. 1997 Feb; 18(2):389-92. PMID: 9111682.
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  169. Cramer SC, Schaefer PW, Krishnamoorthy KS. Microgyria in the distribution of the middle cerebral artery in a patient with DiGeorge syndrome. J Child Neurol. 1996 Nov; 11(6):494-7. PMID: 9120232.
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  170. Schaefer PW, Budzik RF, Gonzalez RG. Imaging of cerebral metastases. Neurosurg Clin N Am. 1996 Jul; 7(3):393-423. PMID: 8823771.
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  171. Greenberg SM, Finklestein SP, Schaefer PW. Petechial hemorrhages accompanying lobar hemorrhage: detection by gradient-echo MRI. Neurology. 1996 Jun; 46(6):1751-4. PMID: 8649586.
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  172. Mao C, Carter P, Schaefer P, Zhu L, Dominguez JM, Hanson DJ, Appert HE, Kim K, Howard JM. Malignant islet cell tumor associated with hypercalcemia. Surgery. 1995 Jan; 117(1):37-40. PMID: 7809834.
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  173. Breen GA, Brocavich JM, Etzel JV, Shah V, Schaefer P, Forlenza S. Evaluation of effects of altered gastric pH on absorption of dapsone in healthy volunteers. Antimicrob Agents Chemother. 1994 Sep; 38(9):2227-9. PMID: 7811056; PMCID: PMC284721.
  174. Leventhal EA, Leventhal H, Schaefer P, Easterling D. Conservation of energy, uncertainty reduction, and swift utilization of medical care among the elderly. J Gerontol. 1993 Mar; 48(2):P78-86. PMID: 8473701.
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  175. Hale DA, Cohen AJ, Schaefer P, Jordan D, Thompson LD, Bellamy RF, Edwards FH, Barry MJ. Computerized tomography in the evaluation of myasthenia gravis. South Med J. 1990 Apr; 83(4):414-6. PMID: 2321071.
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