WEI ZHAO, PH.D.

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CONTACT INFO

BIOGRAPHY

Wei Zhao received her BEng degree from the Department of Electrical Engineering of Tsinghua University in 1989, majoring in Biomedical Engineering. She received her M.Sc. degree in Medical Biophysics from the University of Toronto in 1993, and Ph.D. degree from the same department in 1997. She is currently an assistant professor in the Department of Radiology and Biomedical Engineering of the State University of New York at Stony Brook. Her research work in the past has focused on the investigation of amorphous selenium flat-panel detectors for radiography and fluoroscopy. She has also worked on the development of cesium iodide based flat-panel detectors for medical imaging. Her recent research interest focuses on the investigation of imaging performance and design optimization for amorphous selenium flat-panel detectors for digital mammography and digital tomosynthesis.

RESEARCH

Wei Zhao's current research is focused on the following four projects:

• Characterization and optimization of a high resolution flat-panel detector for digital mammography (imaging of the breast) through prototype development, image analysis and computer modeling.

This project is supported financially by the Whitaker Foundation, the New York State Sensor CAT, and Anrad Corporation

• The development of detector technology and imaging system for three-dimensional imaging of the breast, which is aimed at achieving better detection of abnormality than existing two dimensional projection images.

This project is supported financially by the US Army Breast Cancer Research Program.

• Feasibility investigation of a large area flat-panel detector with amplification at each pixel based on the Active Column Sensor (ACS) concept for very low dose x-ray imaging applications

            This project is supported financially by Photon Vision Systems and the New York State Sensor CAT.

 

• Investigate the feasibility of a new concept of flat-panel detector for low dose and high frame-rate x-ray imaging. It is an indirect flat-panel detector with avalanche gain.

              This project is supported financially by the National Institute of Health. 

Wei Zhao's research lab, the Digital Radiological Imaging Laboratory, is located on Level 1 of the Health Sciences Center, Room 1109.

 

PUBLICATIONS

• Referred Publications

1. Wei Zhao, W.G. Ji, A. Debrie and J.A. Rowland, “Imaging performance of amorphous selenium based flat-panel detectors for digital mammography: characterization of a small area prototype detector”, Med. Phys. 30, 254-263 (2003)

2. Mary F. Stone, Wei Zhao, Barbara V. Jacak, Paul O'Connor, Bo Yu and Pavel Rehak, "X-ray sensitivity of amorphous selenium for mammography", Med. Phys. 29, 319-324 (2002)

3. Wei Zhao, W. G. Ji and J. A. Rowlands, "Effects of characteristic x rays on the noise power spectra and detective quantum Efficiency of photoconductive x-ray detectors", Med. Phys. 28, 2039-2049 (2001)

4. N. Matsuura, Wei Zhao, Z. Huang and J. A. Rowlands, "Digital radiology using active matrix readout: Amplified pixels for fluoroscopy", Med. Phys. 26, 672-681 (1999)

5. Wei Zhao, D. Waechter and J. A. Rowlands, "Digital Radiology Using Active Matrix Readout of Amorphous Selenium: Radiation Hardness of Thin Film Transistors'', Med. Phys. 25, 527-538 (1998).

6. Wei Zhao, J. Law, D. Waechter, Z. Huang and J. A. Rowlands, "Digital Radiology Using Active Matrix Readout of Amorphous Selenium: Detectors with High Voltage Protection", Med. Phys. 25, 539-549 (1998).

7. W. G. Ji, Wei Zhao and J. A. Rowlands, "X-ray imaging using amorphous selenium: Reduction of aliasing", Med. Phys. 25, 2148-2162 (1998).

8. G. Pang, Wei Zhao and J. A. Rowlands, "Digital radiology using active matrix readout of amorphous selenium: Geometrical and effective fill factors", Med Phys. 25, 1636-1646 (1998).

9. Wei Zhao and J. A. Rowlands, "Digital Radiology Using Active Matrix Readout of Amorphous Selenium: Theoretical Analysis of Detective Quantum Efficiency'', Med. Phys. 24, 1819-1833 (1997).

10. Wei Zhao, I. Blevis, D. Waechter, Z. Huang and J. A. Rowlands, "Digital Radiology Using Active Matrix Readout of Amorphous Selenium: Construction and Evaluation of a Real-time Prototype Detector", Med. Phys. 24, 1834-1843 (1997).

11. J. A. Rowlands, Wei Zhao, I. Blevis, D. Waechter and Z. Huang, "Flat-panel digital radiology using amorphous selenium and active matrix readout", RadioGraphics 17, 753-760 (1997).

12. D. Waechter, Z. Huang, Wei Zhao, I. Blevis and J.A. Rowlands, "Characteristics of dual- gate thin film transistors for applications in digital radiology", Canadian Journal of Physics 74 (suppl), s685-s688 (1996).

13. Wei Zhao and J.A. Rowlands, "X-ray imaging using amorphous selenium: Feasibility of a flat panel self-scanned detector for digital radiology", Med. Phys.22, 1595-1604 (1995)

• Selected Non-refereed Publications:

1. Bo Zhao and Wei Zhao, “Characterization of a Direct, full-field Flat-panel Digital Mammography Detector”, Proc. SPIE 5030, 157-167 (2003)

2. Wei Zhao, G. DeCrescenzo and J. A. Rowlands, "Investigation of lag and ghosting in amorphous selenium flat-panel detectors", Proc. SPIE 4682, 9-20 (2002)

3. Wei Zhao, J. A. Rowlands, W. G. Ji and A. Debrie, "Imaging performance of amorphous selenium based flat-panel detectors for digital mammography", Proc. SPIE 4320, 536-546 (2001).

4. J. A. Rowlands, Winston G. Ji and Wei Zhao, "Effect of depth dependent modulation transfer function and K-fluorescence reabsorption on the detective quantum efficiency of indirect conversion flat panel x-ray imaging systems using CsI", Proc. SPIE 4320, 257-267 (2001)

5. Wei Zhao, W. G. Ji, J. A. Rowlands and A. Debrie, "Relationship between detector design parameters and imaging performance of amorphous selenium based flat-panel detectors for digital mammography", in the Proceedings for the 5th International Workshop on Digital Mammography, Ed. by M. J. Yaffe, 120-126 (2000)

6. J. A. Rowlands, W. G. Ji, Wei Zhao and D. L. Y. Lee, "Direct-conversion flat-panel x-ray imaging: reduction of noise by presampling filtration", Proc. SPIE 3977, 446-455 (2000)

7. Wei Zhao, I. Blevis, S. Germann, J. A. Rowlands, D. Waechter and Z. Huang, "A flat panel detector for digital radiology using active matrix readout of amorphous selenium", Medical Imaging 1996: Physics of Medical Imaging, Proc. SPIE 2708, 523-531 (1996).

8. Wei Zhao, J.A. Rowlands, S. Germann, D. Waechter and Z. Huang, "Digital radiology using self-scanned readout of amorphous selenium: Design considerations for digital mammography", Medical Imaging 1995: Physics of Medical Imaging, Proc. SPIE 2432, 250-259 (1995).

9. Wei Zhao and J.A. Rowlands, "digital radiology using self-scanned readout of amorphous selenium", Medical Imaging VII: Imaging Instrumentation, Ed. by R. Shaw, Proc. SPIE 1896, 114-120 (1993).

10. Wei Zhao and J.A. Rowlands, "A large area solid-state detector for radiology using amorphous selenium", Medical Imaging VI: Imaging Instrumentation, Ed. by: R. Shaw, Proc. SPIE 1651, 134-143 (1992).

 

RESEARCH OPPORTUNITY

Research Assistantships are available. If you are interested, please email your CV.

Ph.D. candidates in relevant fields (Medical Physics, Biomedical Engineering, Electrical Engineering and Physics) are preferred.

Dr. Wei Zhao is a member of the graduate program faculty of the Department of Biomedical Engineering, SUNY at Stony Brook. For application information for the newly created Medical Physics Track of the BME graduate program, please visit the web site for the BME department.

OTHER LINKS

State University of New York at Stony Brook

Hong Qin, Ph.D.