Contact, publication, and social network information about Harvard faculty and fellows. Harvard Catalyst Profiles
Keywords
Last Name
Institution

profileSai Chun Tang, PH.D.

TitleAssistant Professor of Radiology
InstitutionBrigham and Women's Hospital
DepartmentRadiology
AddressBrigham and Women's Hospital
Radiology, EBRC 518
221 Longwood Ave
Boston MA 02115
Phone617/525-7464
vCardDownload vCard (login for email)
Profile Picture

Collapse Biography 
Collapse awards and honors
1996Li Po Chun Scholarships
1997First prize of IEEE HK Section Student Paper Contest
1997Interek Testing Service (ITS) Scholarship
2000Champion of Paper Contest (IEE Hong Kong Younger Member Section)
2002Award for the Best Poster Presentation in the 16th European Conference on Solid-State Transducers
2011IEEE Senior Member
2013Best Poster Award in the 2013 Massachusetts Biotechnology Council Annual Meeting
2013First Prize for Poster Presentation in the 1st Annual BWH Radiology Research Symposium
2015Brigham and Women’s Hospital Faculty Career Development Awards

Collapse Overview 
Collapse overview
I have been conducting research in medical electronics for 10 years after obtaining my postdoctoral training at MIT and the National University of Ireland, Galway, and my PhD in Electronic Engineering at the City University of Hong Kong. I joined the Brigham and Women's Hospital, and Harvard Medical School in 2004. Presently, I am an Assistant Professor of Radiology at the Harvard Medical School.

My PhD research centered on contactless energy transfer by magnetic coupling. After joining the Harvard Medical School, I applied this technique to medical research and proposed a method to wirelessly transmit energy to operate a deep-seated implantable ultrasonic device without the requirement of embedded battery. After I presented this study in a conference, a company subcontracted an NIH SBIR project to us for the development of a wirelessly powered implantable blood flow monitoring device.

In my research on Wireless Intermediate-range Scheme for Energy and Signal Transmission (WISEST) for implantable medical devices, I suggested a patent-pending coil segmentation method that can significantly reduce the transmitting coil voltage to a safe level (~10V) while the commonly used methods require more than a few kilo-volt. The implanted device can be deep-seated or even locomotive in the body and the energy receiving coils do not require ferromagnetic cores, so MRI compatible implants are achievable. My wireless energy transmission research resulted in two first prizes in the MassBio Annual Meeting and BWH Radiology Research Symposium in 2013.

In the Focused Ultrasound Lab at BWH, I have developed novel excitation methods for high-intensity focused ultrasound (HIFU) transducer for non-invasive treatments, including tumor ablation, stroke therapy, and local opening of the blood brain barrier. In 2014, I was involved in the design and development of a 2000-channel ultrasound power amplifier system for the excitation of large-scale phased array transducers, which has been used in the Sunnybrook Health Sciences Centre in Toronto. In 2007, I suggested a novel technique for HIFU amplifier design using a harmonic cancellation scheme that substantially reduce the size and cost of the amplifier system by eliminating the output filter. Meanwhile, I was involved in the design and investigation of a robotic-arm-controlled non-invasive HIFU surgical system, initially for instant blood vessel clogging. The amplifier system I worked on can generate a high-frequency voltage to drive ultrasound transducers up to 10-MHz in order to improve the spatial resolution of the HIFU focusing.

In addition to therapeutic ultrasound, I have also developed diagnostic transcranial ultrasound systems, including a computer-controlled system and a portable microcontroller-based system, for sinus infection detection. The portable system was used in clinical trials at the Boston Medical Center. Presently, I am developing a large scale ultrasound tomographic brain imaging system.

In summary, my research in medical electronics results in several peer-reviewed journal publications. The ultrasound systems I developed have been tested in clinical trials. The wireless energy transmission method resulted in a patent application, two first prizes in poster presentations, and an NIH SBIR subcontract. Going forward, I am working on applying this technique to more novel clinical devices.


Collapse Bibliographic 
Collapse selected publications
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.
List All   |   Timeline
  1. Tang SC. A Low-Operating-Voltage Wireless Intermediate-range Scheme for Energy and Signal Transmission by Magnetic Coupling for Implantable Devices. IEEE Journal of Emerging and Selected Topics in Power Electronics. 2015; 3(1):242-251.
  2. Tang SC, McDannold NJ. Power Loss Analysis and Comparison of Segmented and Unsegmented Energy Coupling Coils for Wireless Energy Transfer. IEEE Journal of Emerging and Selected Topics in Power Electronics. 2015; 3(1):215-225.
  3. Tang SC, McDannold NJ. Power Loss Analysis and Comparison of Segmented and Unsegmented Energy Coupling Coils for Wireless Energy Transfer. IEEE J Emerg Sel Top Power Electron. 2015 Mar; 3(1):215-225. PMID: 26640745.
    View in: PubMed
  4. Tang SC, Clement GT. A computerized tomography system for transcranial ultrasound imaging. Proc Meet Acoust. 2014; 22. PMID: 25598864.
    View in: PubMed
  5. Hamed A, Tang SC, Ren H, Squires A, Payne C, K Masamune, Tang G, Mohammadpour J, Tse ZTH . Advances in Haptics, Tactile Sensing, and Manipulation for Robot-Assisted Minimally Invasive Surgery, Noninvasive Surgery, and Diagnosis. Journal of Robotics. 2012; DOI: 10.1155/2012/412816.
  6. Tang SC, Jolesz FA, Clement GT. A wireless batteryless deep-seated implantable ultrasonic pulser-receiver powered by magnetic coupling. IEEE Trans Ultrason Ferroelectr Freq Control. 2011 Jun; 58(6):1211-21. PMID: 21693403.
    View in: PubMed
  7. Tang SC, Clement GT. Acoustic standing wave suppression using randomized phase-shift-keying excitations. J Acoust Soc Am. 2009 Oct; 126(4):1667-70. PMID: 19813782; PMCID: PMC2771052.
  8. Tang SC, Clement GT. Standing-wave suppression for transcranial ultrasound by random modulation. IEEE Trans Biomed Eng. 2010 Jan; 57(1):203-5. PMID: 19695991; PMCID: PMC2887681.
  9. White PJ, Whalen S, Tang SC, Clement GT, Jolesz F, Golby AJ. An intraoperative brain shift monitor using shear mode transcranial ultrasound: preliminary results. J Ultrasound Med. 2009 Feb; 28(2):191-203. PMID: 19168769; PMCID: PMC2631551.
  10. Tang SC, Clement GT. A harmonic cancellation technique for an ultrasound transducer excited by a switched-mode power converter. IEEE Trans Ultrason Ferroelectr Freq Control. 2008 Feb; 55(2):359-67. PMID: 18334342.
    View in: PubMed
  11. Tang SC, Clement GT, Hynynen K. A computer-controlled ultrasound pulser-receiver system for transskull fluid detection using a shear wave transmission technique. IEEE Trans Ultrason Ferroelectr Freq Control. 2007 Sep; 54(9):1772-83. PMID: 17941383; PMCID: PMC2186207.
  12. Duffy MC, Tang SC, Ripka P. Application of fluxgate excitation circuit with saturable inductor to magnetic sensing. Sensors and Actuators A: Physical. 2005; 123-124:430-437.
  13. Tang SC, Keim TA, Perreault DJ. Thermal modeling of Lundell alternators. IEEE Transactions on Energy Conversion. 2005; 20(1):25-36.
  14. Tang SC, Duffy MC, Ripka P, Hurley WG. Excitation circuit for fluxgate sensor using saturable inductor. Sensors and Actuators A: Physical. 2004; 113(2):156-165.
  15. Tang SC, Hui SYR, Chung H. Evaluation of the shielding effects on printed-circuit-board transformers using ferrite plates and copper sheets. IEEE Transactions on Power Electronics. 2002; 17(6):1080-1088.
  16. Tang SC, Hui SYR, Chung H. A low-profile wide-band three-port isolation amplifier with coreless printed-circuit-board (PCB) transformers. IEEE Transactions on Industrial Electronics. 2001; 48(6):1180-1187.
  17. Tang SC, Hui SYR, Chung H. A low-profile power converter using printed-circuit board (PCB) power transformer with ferrite polymer composite. IEEE Transactions on Power Electronics. 2001; 16(4):493-498.
  18. Tang SC, Hui SYR, Chung H. A low-profile low-power converter with coreless PCB isolation transformer. IEEE Transactions on Power Electronics. 2001; 16(3):311-315.
  19. Tang SC, Hui SYR, Chung H. Characterization of coreless printed circuit board transformer. IEEE Transactions on Power Electronics. 2000; 15(6):1275-1282.
  20. Tang SC, Hui SYR, Chung H. Coreless planar printed circuit board (PCB) transformer – a fundamental concept for signal and energy transfer. IEEE Transactions on Power Electronics. 2000; 15(5):931-941.
  21. Chung H, Hui SYR, Tang SC. Development of a multistage current-controlled switched-capacitor step-down dc/dc converter with continuous input current. IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications. 2000; 47(7):1017-1025.
  22. Hui SYR, Tang SC, Chung H. Some electromagnetic aspects of coreless PCB transformers. IEEE Transactions on Power Electronics. 2000; 15(4):805-810.
  23. Hui SYR, Tang SC, Chung H. Coreless printed circuit board (PCB) transformers -- Fundamental characteristics and application potential. IEEE Circuits and Systems Newsletter. 2000; 11(3):1, 3-15, 47.
  24. Tang SC, Hui SYR, Chung H. Coreless printed circuit board (PCB) transformers with high power density and high efficiency. IEE Electronics Letters. 2000; 36(11):943-944.
  25. Chung H, Hui SYR, Tang SC. On the use of current control scheme for switched-capacitor DC/DC converters. IEEE Transactions on Industrial Electronics. 2000; 47(2):238-244.
  26. Tang SC, Hui SYR, Chung H. A naturally soft-switched high-frequency gate drive circuit for power MOSFETs/IGBTs. IEEE Power Electronics and Drive Systems 1999. 1999; 246-252.
  27. Hui SYR, Tang SC, Chung H. Optimal operation of coreless PCB transformer-isolated gate drive circuits with wide switching frequency range. Transactions on Power Electronics. 1999; 14(3):506-514.
  28. Hui SYR, Chung H, Tang SC. Coreless printed circuit board (PCB) transformers for power MOSFET/IGBT gate drive circuits. IEEE Transactions on Power Electronics. 1999; 14(3):422-430.
  29. Tang SC, Hui SYR, Chung H. Coreless printed circuit board (PCB) transformers with multiple secondary windings for complementary gate drive circuits. IEEE Transactions on Power Electronics. 1999; 14(3):431-437.
  30. Hui SYR, Tang SC, Chung H. Coreless printed-circuit board transformers for signal and energy transfer. IEE Electronics Letters. 1998; 34(11):1052-1054.
Local representatives can answer questions about the Profiles website or help with editing a profile or issues with profile data. For assistance with this profile: HMS/HSDM faculty should contact feedbackcatalyst.harvard.edu. For faculty or fellow appointment updates and changes, please ask your appointing department to contact HMS. For fellow personal and demographic information, contact HMS Human Resources at human_resourceshms.harvard.edu. For faculty personal and demographic information, contact HMS Office for Faculty Affairs at facappthms.harvard.edu.
Tang's Networks
Click the "See All" links for more information and interactive visualizations!
Concepts Expand Description
_
Co-Authors Expand Description
_
Similar People Expand Description
_
Same Department Expand Description
Physical Neighbors Expand Description
_