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Efren J. Flores, M.D.

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Biography
University of Puerto Rico, Rio Piedras Cambus, San Juan, PRBS2001Biology
University of Puerto Rico, School of Medicine, San Juan, PRMD2005Medicine
Massachusetts General Hospital, Dept. of Radiology, Boston, MA2010Radiology

Overview
I am a health services researcher focused on understanding health disparities to inform the development of innovative and multidisciplinary interventions to enhance health equity for underserved patient populations. My clinical experience and personal background serve as strong foundations for my clinical research at the intersection of equity, innovation and healthcare. The research work from our group has resulted in multiple peer reviewed publications, scientific presentations and grant funding.

Featured Content

Bibliographic
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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PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
  1. Joseph NP, Reid NJ, Som A, Li MD, Hyle EP, Dugdale CM, Lang M, Betancourt JR, Deng F, Mendoza DP, Little BP, Narayan AK, Flores EJ. Racial/Ethnic Disparities in Disease Severity on Admission Chest Radiographs among Patients Admitted with Confirmed COVID-19: A Retrospective Cohort Study. Radiology. 2020 Jul 16; 202602. PMID: 32673191.
    Citations:    
  2. Lang M, Som A, Mendoza DP, Flores EJ, Li MD, Shepard JO, Little BP. Detection of Unsuspected Coronavirus Disease 2019 Cases by Computed Tomography and Retrospective Implementation of the Radiological Society of North America/Society of Thoracic Radiology/American College of Radiology Consensus Guidelines. J Thorac Imaging. 2020 Jun 17. PMID: 32558725.
    Citations:    
  3. Lang M, Som A, Mendoza DP, Flores EJ, Reid N, Carey D, Li MD, Witkin A, Rodriguez-Lopez JM, Shepard JO, Little BP. Hypoxaemia related to COVID-19: vascular and perfusion abnormalities on dual-energy CT. Lancet Infect Dis. 2020 Apr 30. PMID: 32359410.
    Citations:    
  4. Febbo J, Little B, Fischl-Lanzoni N, Narayan AK, Tiersma KM, Glover M, Shepard JO, Flores EJ. Analysis of Out-of-Pocket Cost of Lung Cancer Screening for Uninsured Patients Among ACR-Accredited Imaging Centers. J Am Coll Radiol. 2020 Apr 09. PMID: 32278848.
    Citations:    
  5. Narayan AK, Pourvaziri A, Lopez DB, Miles RC, Kambadakone A, Flores EJ. Using CT Encounters to Improve Colorectal Cancer Screening Utilization: Cross-Sectional Survey Results From the National Health Interview Survey. Curr Probl Diagn Radiol. 2020 Mar 03. PMID: 32249019.
    Citations:    
  6. Wang GX, Narayan AK, Park ER, Lehman CD, Gorenstein JT, Flores EJ. Screening Mammography Visits as Opportunities to Engage Smokers With Tobacco Cessation Services and Lung Cancer Screening. J Am Coll Radiol. 2020 May; 17(5):606-612. PMID: 31930983.
    Citations:    
  7. Gagne SM, Fintelmann FJ, Flores EJ, McDermott S, Mendoza DP, Petranovic M, Price MC, Stowell JT, Little BP. Evaluation of the Informational Content and Readability of US Lung Cancer Screening Program Websites. JAMA Netw Open. 2020 01 03; 3(1):e1920431. PMID: 32003825.
    Citations:    
  8. Lopez D, Miles RC, Flores EJ, Lehman CD, Narayan AK. Breast Cancer Screening in Puerto Rico and Other US Territories: Findings from the 2016 Behavioral Risk Factor Surveillance System Survey. J Health Care Poor Underserved. 2020; 31(1):340-352. PMID: 32037335.
    Citations:    
  9. Percac-Lima S, Ashburner JM, Atlas SJ, Rigotti NA, Flores EJ, Kuchukhidze S, Park ER. Barriers to and Interest in Lung Cancer Screening Among Latino and Non-Latino Current and Former Smokers. J Immigr Minor Health. 2019 Dec; 21(6):1313-1324. PMID: 30701427.
    Citations:    Fields:    
  10. Almeida RR, Marchiori E, Flores EJ. Frequency and Reliability of the Reversed Halo Sign in Patients With Septic Pulmonary Embolism Due to IV Substance Use Disorder. AJR Am J Roentgenol. 2020 01; 214(1):59-67. PMID: 31670590.
    Citations:    
  11. Nisavic M, Flores EJ, Heng M, Kontos NJ, Quijije N. Case 26-2019: A 27-Year-Old Woman with Opioid Use Disorder and Suicidal Ideation. N Engl J Med. 2019 Aug 22; 381(8):763-771. PMID: 31433925.
    Citations:    
  12. Singh R, Sharma A, McDermott S, Homayounieh F, Rastogi S, Flores EJ, Shepard JAO, Gilman MD, Digumarthy SR. Comparison of image quality and radiation doses between rapid kV-switching and dual-source DECT techniques in the chest. Eur J Radiol. 2019 Oct; 119:108639. PMID: 31442929.
    Citations:    
  13. Irwin KE, Steffens EB, Yoon Y, Flores EJ, Knight HP, Pirl WF, Freudenreich O, Henderson DC, Park ER. Lung Cancer Screening Eligibility, Risk Perceptions, and Clinician Delivery of Tobacco Cessation Among Patients With Schizophrenia. Psychiatr Serv. 2019 10 01; 70(10):927-934. PMID: 31357921.
    Citations:    
  14. Almeida RR, Glover M, Mercaldo SF, López DB, Tso DK, Raja AS, Lev MH, Flores EJ. Temporal Trends in Imaging Utilization for Suspected Substance Use Disorder in an Academic Emergency Radiology Department. J Am Coll Radiol. 2019 Oct; 16(10):1440-1446. PMID: 31092351.
    Citations:    
  15. López DB, Flores EJ, Miles RC, Wang GX, Glover M, Shepard JO, Lehman CD, Narayan AK. Assessing Eligibility for Lung Cancer Screening Among Women Undergoing Screening Mammography: Cross-Sectional Survey Results From the National Health Interview Survey. J Am Coll Radiol. 2019 Oct; 16(10):1433-1439. PMID: 31092347.
    Citations:    
  16. Tso DK, Almeida RR, Prabhakar AM, Singh AK, Raja AS, Flores EJ. Accuracy and timeliness of an abbreviated emergency department MRCP protocol for choledocholithiasis. Emerg Radiol. 2019 Aug; 26(4):427-432. PMID: 31030393.
    Citations:    
  17. Betancourt JR, Tan-McGrory A, Flores E, López D. Racial and Ethnic Disparities in Radiology: A Call to Action. J Am Coll Radiol. 2019 Apr; 16(4 Pt B):547-553. PMID: 30947886.
    Citations:    
  18. Flores EJ, Park ER, Irwin KE. Improving Lung Cancer Screening Access for Individuals With Serious Mental Illness. J Am Coll Radiol. 2019 Apr; 16(4 Pt B):596-600. PMID: 30947893.
    Citations:    
  19. Narayan AK, Lopez DB, Miles RC, Dontchos B, Flores EJ, Glover M, Lehman CD. Implementation of an Intimate Partner Violence Screening Assessment and Referral System in an Academic Women's Imaging Department. J Am Coll Radiol. 2019 Apr; 16(4 Pt B):631-634. PMID: 30947898.
    Citations:    
  20. Carlos RC, Flores EJ. Health Equity. J Am Coll Radiol. 2019 04; 16(4 Pt B):539-541. PMID: 30947884.
    Citations:    
  21. Berland LL, Monticciolo DL, Flores EJ, Malak SF, Yee J, Dyer DS. Relationships Between Health Care Disparities and Coverage Policies for Breast, Colon, and Lung Cancer Screening. J Am Coll Radiol. 2019 Apr; 16(4 Pt B):580-585. PMID: 30947890.
    Citations:    
  22. Lopez D, Pratt-Chapman ML, Rohan EA, Sheldon LK, Basen-Engquist K, Kline R, Shulman LN, Flores EJ. Establishing effective patient navigation programs in oncology. Support Care Cancer. 2019 Jun; 27(6):1985-1996. PMID: 30887125.
    Citations:    
  23. Stowell JT, Grimstad FW, Kirkpatrick DL, Brown LR, Flores EJ. Serving the Needs of Transgender and Gender-Diverse Persons in Radiology. J Am Coll Radiol. 2019 04; 16(4 Pt A):533-535. PMID: 30819454.
    Citations:    
  24. Flores EJ, López D, Miles RC, Glover M, Lehman CD, Harvey HB, Narayan AK. Impact of Primary Care Physician Interaction on Longitudinal Adherence to Screening Mammography Across Different Racial/Ethnic Groups. J Am Coll Radiol. 2019 Jul; 16(7):908-914. PMID: 30737162.
    Citations:    
  25. Flores EJ, Narayan AK. The Role of Radiology in Intimate Partner Violence. Radiology. 2019 Apr; 291(1):70-71. PMID: 30735471.
    Citations:    
  26. Wang GX, Baggett TP, Pandharipande PV, Park ER, Percac-Lima S, Shepard JO, Fintelmann FJ, Flores EJ. Barriers to Lung Cancer Screening Engagement from the Patient and Provider Perspective. Radiology. 2019 02; 290(2):278-287. PMID: 30620258.
    Citations:    Fields:    
  27. Miles RC, Narayan AK, Lopez DB, Lehman CD, Harvey HB, Mishra V, Glover M, Flores EJ. Chronic Medical Illness as a Risk Factor for Poor Mammography Screening Adherence. J Womens Health (Larchmt). 2019 10; 28(10):1378-1383. PMID: 30565970.
    Citations:    Fields:    
  28. Canellas R, Digumarthy S, Tabari A, Otrakji A, McDermott S, Flores EJ, Kalra M. Radiation dose reduction in chest dual-energy computed tomography: effect on image quality and diagnostic information. Radiol Bras. 2018 Nov-Dec; 51(6):377-384. PMID: 30559555.
    Citations:    
  29. Narayan AK, Flores EJ, Harvey HB, Lehman CD. Population-Based Health Engagement Opportunities Through Breast Imaging: A Population-Based Cross-Sectional Survey. J Am Coll Radiol. 2018 Oct; 15(10):1401-1407. PMID: 30061047.
    Citations:    Fields:    
  30. Almeida RR, Mansouri M, Tso DK, Johnson AH, Lev MH, Singh AK, Flores EJ. The added value of cross-sectional imaging in the detection of additional radiographically occult fractures in the setting of a Chopart fracture. Emerg Radiol. 2018 Oct; 25(5):513-520. PMID: 29876712.
    Citations:    Fields:    
  31. Neal CD, Weaver DT, Raphel TJ, Lietz AP, Flores EJ, Percac-Lima S, Knudsen AB, Pandharipande PV. Patient Navigation to Improve Cancer Screening in Underserved Populations: Reported Experiences, Opportunities, and Challenges. J Am Coll Radiol. 2018 Nov; 15(11):1565-1572. PMID: 29685346.
    Citations:    Fields:    
  32. Daye D, Carrodeguas E, Glover M, Guerrier CE, Harvey HB, Flores EJ. Impact of Delayed Time to Advanced Imaging on Missed Appointments Across Different Demographic and Socioeconomic Factors. J Am Coll Radiol. 2018 May; 15(5):713-720. PMID: 29503152.
    Citations:    Fields:    Translation:Humans
  33. Shepard JO, Flores EJ, Abbott GF. Imaging of the trachea. Ann Cardiothorac Surg. 2018 Mar; 7(2):197-209. PMID: 29707497.
    Citations:    
  34. Hossain R, Almeida RR, Natcheva H, Hedgire S, Ghoshhajra B, Shepard JA, Fintelmann FJ, Flores EJ. Complications of Intravenous Substance Use Disorders (SUDs): A Multimodality Pictorial Essay for Cardiothoracic Radiologists. J Thorac Imaging. 2018 Mar; 33(2):W1-W12. PMID: 29257030.
    Citations:    Fields:    Translation:Humans
  35. Jessup DL, Glover Iv M, Daye D, Banzi L, Jones P, Choy G, Shepard JO, Flores EJ. Implementation of Digital Awareness Strategies to Engage Patients and Providers in a Lung Cancer Screening Program: Retrospective Study. J Med Internet Res. 2018 02 15; 20(2):e52. PMID: 29449199.
    Citations:    Fields:    
  36. McDermott S, Otrakji A, Flores EJ, Kalra MK, Shepard JO, Digumarthy SR. Should Dual-Energy Computed Tomography Pulmonary Angiography Replace Single-Energy Computed Tomography Pulmonary Angiography in Pregnant and Postpartum Patients? J Comput Assist Tomogr. 2018 Jan/Feb; 42(1):25-32. PMID: 28786905.
    Citations: 1     Fields:    Translation:Humans
  37. Raja AS, Miller ES, Flores EJ, Wakeman SE, Eng G. Case 37-2017. A 36-Year-Old Man with Unintentional Opioid Overdose. N Engl J Med. 2017 Nov 30; 377(22):2181-2188. PMID: 29171813.
    Citations:    Fields:    Translation:Humans
  38. Bhattacharyya RP, Flores EJ, Azar MM. Case 30-2017. A 65-Year-Old Woman with Altered Mental Status, Bacteremia, and Acute Liver Failure. N Engl J Med. 2017 Sep 28; 377(13):1274-1282. PMID: 28953442.
    Citations:    Fields:    Translation:HumansCells
  39. LaCasce AS, Flores EJ, Goldstein RH, Sohani AR. Case 25-2017. N Engl J Med. 2017 Aug 17; 377(7):677-688. PMID: 28813220.
    Citations:    Fields:    Translation:HumansCells
  40. Glover M, Daye D, Khalilzadeh O, Pianykh O, Rosenthal DI, Brink JA, Flores EJ. Socioeconomic and Demographic Predictors of Missed Opportunities to Provide Advanced Imaging Services. J Am Coll Radiol. 2017 Nov; 14(11):1403-1411. PMID: 28676305.
    Citations: 1     Fields:    Translation:Humans
  41. Harvey HB, Liu C, Ai J, Jaworsky C, Guerrier CE, Flores E, Pianykh O. Predicting No-Shows in Radiology Using Regression Modeling of Data Available in the Electronic Medical Record. J Am Coll Radiol. 2017 Oct; 14(10):1303-1309. PMID: 28673777.
    Citations: 1     Fields:    Translation:Humans
  42. Padole A, Digumarthy S, Flores E, Madan R, Mishra S, Sharma A, Kalra MK. Assessment of chest CT at CTDIvol less than 1?mGy with iterative reconstruction techniques. Br J Radiol. 2017 Mar; 90(1071):20160625. PMID: 28055250.
    Citations:    Fields:    Translation:Humans
  43. Gunn AJ, Tuttle MC, Flores EJ, Mangano MD, Bennett SE, Sahani DV, Choy G, Boland GW. Differing Interpretations of Report Terminology Between Primary Care Physicians and Radiologists. J Am Coll Radiol. 2016 Dec; 13(12 Pt A):1525-1529.e1. PMID: 27595196.
    Citations: 1     Fields:    Translation:Humans
  44. McInnis MC, Flores EJ, Shepard JA, Ackman JB. Pitfalls in the Imaging and Interpretation of Benign Thymic Lesions: How Thymic MRI Can Help. AJR Am J Roentgenol. 2016 Jan; 206(1):W1-8. PMID: 26700357.
    Citations: 2     Fields:    Translation:Humans
  45. Otrakji A, Digumarthy SR, Lo Gullo R, Flores EJ, Shepard JA, Kalra MK. Dual-Energy CT: Spectrum of Thoracic Abnormalities. Radiographics. 2016 Jan-Feb; 36(1):38-52. PMID: 26761530.
    Citations: 2     Fields:    Translation:Humans
  46. Fintelmann FJ, Bernheim A, Digumarthy SR, Lennes IT, Kalra MK, Gilman MD, Sharma A, Flores EJ, Muse VV, Shepard JA. The 10 Pillars of Lung Cancer Screening: Rationale and Logistics of a Lung Cancer Screening Program. Radiographics. 2015 Nov-Dec; 35(7):1893-908. PMID: 26495797.
    Citations: 8     Fields:    Translation:Humans
  47. Kamdar MM, Doyle KP, Sequist LV, Rinehart TJ, Maytal G, Flores EJ, Mino-Kenudson M. Case records of the Massachusetts General Hospital. Case 17-2015. A 44-year-old woman with intractable pain due to metastatic lung cancer. N Engl J Med. 2015 May 28; 372(22):2137-47. PMID: 26017825.
    Citations:    Fields:    Translation:Humans
  48. Aran S, Daftari Besheli L, Besheli LD, Karcaaltincaba M, Gupta R, Flores EJ, Abujudeh HH. Applications of dual-energy CT in emergency radiology. AJR Am J Roentgenol. 2014 Apr; 202(4):W314-24. PMID: 24660729.
    Citations: 4     Fields:    Translation:Humans
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Funded by the NIH National Center for Advancing Translational Sciences through its Clinical and Translational Science Awards Program, grant number UL1TR002541.