Publications

Refereed Publications

  1. L. C. Ikejimba, J. Salad, C. G. Graff, M. Goodsitt, H-P. Chan, H. Huang, W. Zhao, B. Ghammraoui, J. Y. Lo, S. J. Glick, “Assessment of task-based performance from five clinical DBT systems using an anthropomorphic breast phantom”, Med. Phys. 48 (3), 1026-1038 (2021)  http://doi.org/10.1002/mp.14568
  2. S. Dow, A. Howansky, A.R. Lubinsky, W. Zhao, “Evaluation of a hybrid direct-indirect active matrix flat-panel imager using Monte Carlo simulation”, J. Med. Imag. 7(3), 033501 (2020)
    doi.org/10.1117/1.JMI.7.3.033501
  3. A. Howansky, A. Mishchenko, A.R. Lubinsky, W. Zhao, “Comparison of CsI:Tl and Gd2O2S :Tb indirect flat panel detector x-ray imaging performance in front- and back-irradiation geometries”, Med. Phys. 46 (11), 4857-4868 (2019). doi.org/10.1002/mp.13791
  4. A.R. Lubinsky, A. Howansky, H. Zheng, W. Zhao, “Back-Irradiated and dual-screen sandwich detector configurations for radiography”, J. Med. Imag. 6(3), 033501 (2019).
    doi.org/10.1117/1.JMI.6.3.033501
  5. H. Huang, D. A. Scaduto, C. Liu, J. Yang, C. Zhu, K. Rinaldi, J. Eisenberg, J. Liu, M. Hoernig, J. Wicklein, S. Vogt, T. Mertelmeier, P. R. Fischer, W. Zhao, “Comparison of contrast-enhanced digital mammography and contrast-enhanced digital breast tomosynthesis for lesion assessment”, J. Med. Imag. 6(3) 031407 (2019).  doi.org/10.1117/1.JMI.6.3.031407
  6. J. Stavro, A.H. Goldan, W. Zhao, “Photon counting performance of amorphous selenium and its dependence on detector structure”, J. Med. Imag. 5(4) 043502 (2018). doi.org/10.1117/1.JMI.5.4.043502
  7. A. Howansky, A. R. Lubinsky, K. Suzuki, S. Ghose, W. Zhao, “An apparatus and method for directly measuring the depth-dependent gain and spatial resolution of turbid scintillators”, Med. Phys. 45, 4927-4941 (2018). doi:10.1002/mp.13177
  8.  J. R. Scheuermann, A. Howansky, M. Hansroul, S. Leveille, K. Tanioka, W. Zhao, “Towards Scintillator High-Gain Avalanche Rushing Photoconductor Active Matrix Flat Panel Imager (SHARP-AMFPI): Initial Fabrication and Characterization”, Med. Phys. 45, 794-802 (2018). doi:10.1002/mp.12693
  9. D. A. Scaduto, O. Tousignant, W. Zhao, “Experimental characterization of a direct conversion amorphous selenium detector with thicker conversion layer for dual-energy contrast-enhanced breast imaging”, Med. Phys. 44, 3965-3977 (2017). doi:10.1002/mp.12358
  10. A. Howansky, B. Peng, A. R. Lubinsky, W. Zhao, “Deriving depth-dependent light escape efficiency and optical Swank factor from measured pulse height spectra of scintillators”, Med. Phys. 44, 847-860 (2016).  doi:10.1002/mp.12083
  11. A. H. Goldan, C. Li, S. J. Pennycook, J. Schneider, A. Blom, W. Zhao, “Molecular structure of vapor-deposited amorphous selenium,” J. Appl. Phys. 120, 135101 (2016). doi:10.1063/1.4962315
  12. J. R. Scheuermann, Y. Miranda, H. Liu, W. Zhao, “Charge transport model in solid-state avalanche amorphous selenium and defect suppresion design,” J. Appl. Phys. 119, 024508 (2016). doi:10.1063/1.4939602
  13. Y. Lu, B. Peng, B. A. Lau, Y.-H. Hu, D. A. Scaduto, W. Zhao, G. Gindi, “A scatter correction method for contrast-enhanced dual-energy digital breast tomosynthesis,” Phys. Med. Bio. 60, 6323-6354 (2015). doi:10.1088/0031-9155/60/16/6323
  14. J. R. Scheuermann, A. H. Goldan, O. Tousignant, S. Leveille, W. Zhao, “Development of solid-state avalanche amorphous selenium for medical imaging,” Med. Phys. 42, 1223-1226 (2015). doi:10.1118/1.4907971
  15. Y.-H. Hu, W. Zhao, “The effect of amorphous selenium detector thickness on dual-energy digital breast imaging,” Med. Phys. 41, 111904 (2014). doi:10.1118/1.4897244
  16. A. H. Goldan, W. Zhao, “A field-shaping multi-well avalanche detector for direct conversion amorphous selenium,” Med. Phys. 40, 010702 (2013). doi:10.1118/1.4769110
  17. M. Wronski, W. Zhao, K. Tanioka, G. DeCrescenzo, J.A. Rowlands, “Scintillator high-gain avalanche rushing photoconductor active-matrix flat panel imager: Zero-spatial frequency x-ray imaging properties of the solid-state SHARP sensor structure,” Med. Phys. 39, 7102-7109 (2012). doi:10.1118/1.4760989
  18. Y.-H. Hu and W. Zhao, “The effect of angular dose distribution on the detection of microcalcifications in digital breast tomosynthesis”, Med. Phys. 38, 2455-2466 (2011). doi:10.1118/1.3570580
  19. M. Wronski, W. Zhao, et al., “A solid-state amorphous selenium avalanche technology for low photon flux imaging applications”, Med. Phys. 37, 4982-4985 (2010). doi:10.1118/1.3483096
  20. D. Li, W. Zhao, M. Nanba, and Norifomi Egami, “Scintillator avalanche photoconductor with high resolution emitter readout for low dose x-ray imaging: Lag”, Med. Phys. 36, 4047 – 4058 (2009). doi:10.1118/1.3187227
  21. B. Zhao, J. Zhou, Y.-H. Hu, T. Mertelmeier, J. Lugwig and W. Zhao, “Experimental validation of a three-dimensional linear system model for breast tomosynthesis,” Med. Phys. 36, 240-251 (2009). doi:10.1118/1.3040178
  22. B. Zhao and W. Zhao, “A Three-dimensional Linear System Model for Digital Breast Tomosynthesis”, Med. Phys. 35, 5219-5232 (2008). doi:10.1118/1.3040178
  23. Y.-H. Hu, B. Zhao and W. Zhao, “Image artifacts in digital breast tomosynthesis: Investigation of the effects of system geometry and reconstruction parameters using a linear system approach”, Med. Phys. 35, 5242-5252 (2008). doi:10.1118/1.2996110
  24. D. Li and W. Zhao, “SAPHIRE (Scintillator Avalanche Photoconductor with High Resolution Emitter readout) for low dose x-ray imaging: Spatial resolution”, Med. Phys. 35, 3151-3161 (2008). doi:10.1118/1.2937652
  25. B. Zhao and W. Zhao, “Imaging performance of an amorphous selenium digital mammography detector in a breast tomosynthesis system”, Med. Phys. 35, 1978-1987 (2008). doi:10.1118/1.2903425
  26. J. Zhou, B. Zhao and W. Zhao, “A computer simulation platform for the optimization of a breast tomosynthesis system”, Med. Phys. 34, 1098-1109 (2007). doi:10.1118/1.2558160
  27. J. A. Segui and W. Zhao, “Amorphous selenium flat panel detectors for digital mammography: Validation of a NPWE model observer with CDMAM observer performance experiments” Med. Phys. 33, 3711-3722 (2006). doi:10.1118/1.2349689
  28. A. Reznik, B. J. M. Lui, Y. Ohkawa, T. Matsubara, K. Miyakawa, M. Kubota, K. Tanioka, T. Kawai, W. Zhao and J. A. Rowlands, “The quantum efficiency of photo-charge generation in a-Se avalanche photodetectors”, Nuclear Instrument and Methods A 567, 93-95 (2006). doi:10.1016/j.nima.2006.05.116
  29. A. R. Lubinsky, W. Zhao, G. Ristic and J. A. Rowlands, “Screen optics effects on detective quantum efficiency in digital radiography: Zero-frequency effects”, Med. Phys. 33, 1499-1509 (2006). doi:10.1118/1.2188082
  30. W. Zhao, D. Li, Alla Reznik, B. J. M. Lui, D. C. Hunt, J. A. Rowlands, Y. Ohkawa and K. Tanioka, “Indirect flat-panel detector with avalanche gain: Fundamental feasibility investigation for SHARP-AMFPI (Scintillator HARP Active Matrix Flat Panel Imager)”, Med. Phys. 2954-2966 (2005). doi:10.1118/1.2008428
  31. W. Zhao, D. C. Hunt, K. Tanioka and J. A. Rowlands, “Amorphous selenium flat panel detectors for medical applications”, Nuclear Instruments and Methods in Physics Research A, 549, 205-209 (2005). doi:10.1016/j.nima.2005.04.053
  32. B. Zhao and W. Zhao, “Temporal performance of amorphous selenium mammography detectors”, Med. Phys. 32, 128-136 (2005). doi:10.1118/1.1827791
  33. W. Zhao, G. Ristic and J. A. Rowlands, “Inherent Imaging Performance of Cesium Iodide Scintillators”, Med. Phys. 31, 2594-2605 (2004). doi:10.1118/1.1782676
  34. W. Zhao, G. DeCrescenzo, S. O. Kasap and J. A. Rowlands, “Ghosting caused by bulk charge trapping in amorphous selenium flat-panel detectors”, Med. Phys. 32, 488-500 (2005). doi:10.1118/1.1843353
  35. M. Z. Kabir, S.O. Kasap, W. Zhao and J. A. Rowlands, “Direct conversion x-ray imagers: Charge trapping, DQE(0) and MTF” IEE Proceedings in Circuits, Devices and Systems, 150 258-266 (2003)
  36. W. Zhao, W. G. Ji, A. Debrie and J. A. Rowlands, “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). doi:10.1118/1.1538233
  37. M. F. Stone, W. Zhao, B. V. Jacak, P. O’Connor, B. Yu and P. Rehak, “X-ray sensitivity of amorphous selenium for mammography”, Med. Phys. 29, 319-324 (2002). doi:10.1118/1.1449874
  38. W. 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). doi:10.1118/1.1405845
  39. N. Matsuura, W. Zhao, Z. Huang and J. A. Rowlands, “Digital radiology using active matrix readout: amplified pixel detector array for fluoroscopy”, Med. Phys. 26, 672-681 (1999). doi:10.1118/1.598572
  40. W. Zhao, D. Waechter and J. A. Rowlands, “Digital radiology using active matrix readout of amorphous selenium: Radiation hardness of cadmium selenide thin film transistors”, Med. Phys. 25, 527-538 (1998). doi:10.1118/1.598233
  41. W. 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). doi:10.1118/1.598229
  42. W. G. Ji, W. Zhao and J. A. Rowlands, “X-ray imaging using amorphous selenium: Reduction of aliasing”, Med. Phys. 25, 2148-2162 (1998). doi:10.1118/1.598411
  43. G. Pang, W. 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). doi:10.1118/1.598344
  44. W. 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). doi:10.1118/1.598097
  45. W. 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). doi:10.1118/1.598098
  46. J. A. Rowlands, W. Zhao, I. Blevis, D. Waechter and Z. Huang, “Flat-panel digital radiology using amorphous selenium and active matrix readout”, RadioGraphics 17, 753-760 (1997).
  47. D. Waechter, Z. Huang, W. 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). doi:10.1139/p96-845
  48. W. 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). doi:10.1118/1.597628

Conference Proceedings

  1. S. Dow, A. Howansky, A. R. Lubinsky, W. Zhao, “Spatial-frequency-dependent pulse height spectroscopy of x-ray scintillators using single x-ray imaging”, Proc. SPIE 11595, 1159519 (2021) http://dx.doi.org/10.1117/12.2582255
  2. H. Huang, X. Duan, W. Zhao, “Assessment of reproducibility of volumetric breast density measurement using dual energy digital breast tomosynthesis”, Proc. SPIE 11595, 1159529 (2021) http://dx.doi.org/10.1117/12.2582131
  3. X. Duan, H. Huang, W. Zhao, “Strategies of improving lesion detection in wide-angle digital breast tomosynthesis (DBT) with angular dose distribution and detector design”, Proc. SPIE  11595, 11595H (2021) http://dx.doi.org/10.1117/12.2582480
  4. C. Orlik, A. Howansky, S. Leveille, A. Mishchenko, S. Kasap, J. Stavro, A. H. Goldan, J. Scheuermann, W. Zhao, “Improved optical quantum efficiency and temporal performance of a flat-panel imager with avalanche gain”, Proc. SPIE 11595, 1159516 (2021) http://dx.doi.org/10.1117/12.2582035
  5. H. Huang, D. A. Scaduto, K. Rinaldi, J. Liu, J. Wicklein, M. Hoernig, T. Mertelmeier, P. R. Fisher, W. Zhao, “Effects of angular range on lesion margin assessment in contrast-enhanced digital breast tomosynthesis”, Proc. SPIE 10948, 1094840 (2019) doi:10.1117/12.2512243
  6. J. Stavro, A. H. Goldan, W. Zhao, “SWAD: The effect of pixel geometry on the spatial uniformity of avalanche gain”, Proc. SPIE 10948, 109483B (2019) doi:10.1117/12.2513365
  7. J. Tanguay, N. Mantella, J. Stavro, I. Cunningham, A. H. Goldan, W. Zhao, “Cascaded-systems analysis of signal and noise in contrast-enhanced spectral mammography using amorphous selenium photon-counting field-shaping multi-well avalanche detectors (SWADs)” , Proc. SPIE 10948, 109481H (2019) doi:10.1117/12.2512470
  8. A. Howansky, A. R. Lubinsky, W. Zhao, “Investigation of spatial-frequency-http://dx.doi.org/10.1117/12.25.12470dependent noise in columnar CsI:Tl using depth localized single x-ray imaging”, Proc. SPIE 10948, 10948E (2019) doi:10.1117/12.2513363
  9. H. Huang, D. A. Scaduto, C. Liu, J. Yang, C. Zhu, K. Rinaldi, J. Eisenberg, J. Liu, M. Hoernig, J. Wicklein, S. Vogt, T. Mertelmeier, P. Fisher, W. Zhao, “Lesion assessment and radiation dose in contrast-enhanced digital breast tomosynthesis”, Proc. SPIE 10718, 107181J (IWBI 2018) doi:10.1117/12.2316371
  10. D. A. Scaduto, H. Huang, C. Liu, K. Rinaldi, A. Hebecker, T. Mertelmeier, S. Vogt, P. Fisher, W. Zhao, “Impact of angular range of digital breast tomosynthesis on mass detection in dense breasts”, Proc. SPIE 10718, 107181V (IWBI 2018)  doi:10.1117/12.2318243
  11. J. Stavro, A. H. Goldan, W. Zhao, “Photon counting performance of amorphous Selenium and its dependence on detector structure”, Proc. SPIE 10573, 105735Y (2018)
  12. J. Tanguay, J. Stavro, D. McKeown, A. H. Goldan, I. Cunningham, W. Zhao, “Cascaded systems analysis of photon-counting field-shaping multi-well avalanche detectors (SWADs)”, Proc. SPIE 10573, 105734V (2018)
  13. A. Howansky, A. R. Lubinsky, S. K. Ghose, K. Suzuki, W. Zhao, “Investigation of random gain variations in columnar CsI:Tl using single x-ray photon  imaging”, Proc. SPIE 10573, 105730O (2018)
  14. S. Dow, A. Howansky, W. Zhao, “Evaluation of novel multilayer x-ray detector designs using rapid Monte Carlo simulation”, Proc. SPIE 10573, 105730K (2018).
  15. A. Howansky, A. R. Lubinsky, S. K. Ghose, K. Suzuki, W. Zhao, “Direct measurement of Lubberts effect in CsI:Tl scintillators using single x-ray photon imaging”, Proc. SPIE 10132, 1013209-1013209-11 (2017).
  16. J. Stavro, A. H. Goldan, M. Lu, S. Leveille, W. Zhao, “SWAD: transient conductivity and pulse-height spectrum”, Proc. SPIE 10132, 1013208-101308-8 (2017).
  17. D. A. Scaduto, Y.-H. Hu, Y. Lu, H. Huang, J. Liu, K. Rinaldi, G. Gindi, P. R. Fisher, W. Zhao, “Dependence of contrast-enhanced lesion detection in contrast-enhanced digital breast tomosynthesis on imaging chain design”, IWDM, 136-144 (2016).
  18. J. Stavro, A. H. Goldan, W. Zhao, “SWAD: inherent photon counting performance of amorphous selenium multi-well avalanche detector”, Proc. SPIE 9783, 97833Q-97833Q-8 (2016).
  19. J. R. Scheuermann, A. Howansky, A. H. Goldan, O. Tousignant, S. Leveille, K. Tanioka, W. Zhao, “Solid-state flat panel imager with avalanche amorphous selenium”, Proc. SPIE 9783, 978317-978317-9 (2016).
  20. A. Howansky, B. Peng, K. Suzuki, M. Yamashita, A. R. Lubinsky, W. Zhao, “Investigation of the screen optics of thick CsI (Tl) detectors”, Proc. SPIE 9412, 94120G-94120G-12 (2015).
  21. D. A. Scaduto, M. Yang, J. Ripton-Snyder, P. Fisher, W. Zhao, “Digital breast tomosynthesis with minimal breast compression”, Proc. SPIE 9412, 94121Y-94121Y-12 (2015).
  22. J. R. Scheuermann, A. H. Goldan, O. Tousignant, S. Leveille, W. Zhao, “Low dose digital x-ray imaging with avalanche amorphous selenium”, Proc. SPIE 9412, 94120E-94120E-9 (2015).
  23. Y. Lu, B. Peng, D. A. Scaduto, W. Zhao, G. Gindi, “Application of the ordered-subsets transmission reconstruction algorithm to contrast-enhanced dual-energy digital breast tomosynthesis”, IEEE NSS/MIC (2014).
  24. A. H. Goldan, J. A. Rowlands, M. Lu, W. Zhao, “Nanopattern multi-well avalanche selenium detector with picosecond time resolution”, IEEE NSS/MIC  (2014).
  25. D. A. Scaduto, A. R. Lubinsky, J. A. Rowlands, H. Kenmotsu, N. Nishimoto, T. Nishino, K. Tanioka, W. Zhao, “Investigation of spatial resolution and temporal performance of SAPHIRE (scintillator avalanche photoconductor with high resolution emitter readout) with integrated electrostatic focusing”, Proc. SPIE 9033, 90333S-90333S-9 (2014).
  26. Y. Lu, B. Lau, Y.-H. Hu, W. Zhao, G. Gindi, “A simple scatter correction method for dual energy contrast-enhanced digital breast tomosynthesis” Proc. SPIE 9033, 903344-903344-12 (2014).
  27. J. A. Rowlands, W. Zhao, (invited), “Towards a digital radiology roadmap”, ECS Trans. 54, 293-303 (2013).
  28. W. Zhao, J. A. Rowlands, (invited), “Flat-panel x-ray image sensor using thin film transistors and field emitter arrays”, ECS Trans. 54, 305-309 (2013).
  29. L. Chen, Y. Lu, Y.-H. Hu, W. Zhao, G. Gindi, “Impact of subtraction and reconstruction strategies on dual-energy contrast enhanced breast tomosynthesis with interleaved acquisition”, Proc. SPIE 8668, 866850-866850-8 (2013).
  30. Y.-H. Hu, D. A. Scaduto and W. Zhao, “Optimization of clinical protocols for contrast enhanced breast imaging,” Proc. SPIE 8668, 86680G-86680G (2013).
  31. Y.-H. Hu, D. A. Scaduto and W. Zhao, “The effect of amorphous selenium thickness on imaging performance of contrast enhanced digital breast tomosynthesis,” in 11th International Workshop on Breast Imaging, IWDM 2012, July 8, 2012 – July 11, 2012, Vol. 7361 LNCS (Springer Verlag, Philadelphia, PA, United states, (2012), pp. 9-16.
  32. D. A. Scaduto, W. Zhao, “Determination of system geometrical parameters and consistency between scans for contrast-enhanced digital breast tomosynthesis,” in 11th International Workshop on Breast Imaging, IWDM 2012, July 8, 2012 – July 11, 2012, Vol. 7361 LNCS (Springer Verlag, Philadelphia, PA, United states, 2012), pp. 24-31.
  33. Y. H. Hu and W. Zhao, “Experimental quantification of lesion detectability in contrast enhanced dual energy digital breast tomosynthesis”, Proc. SPIE 8313, 83130A (2012).
  34. Y.-H. Hu and W. Zhao, “A 3D linear system model for the optimization of dual-energy contrast-enhanced digital breast tomosynthesis,” Proc SPIE 7961, 79611C-79619 (2011).
  35. Y.-H. Hu, M. Masiar, and W. Zhao, “Breast Structural Noise in Digital Breast Tomosynthesis and Its Dependence on Reconstruction Methods”, Lecture Notes in Computer Science, 6136, 598-605 (2010).
  36. J. Chen, J. Lehnert, P. O’Connor, G. De Geronimo, E. Dolazza, O. Tousignant, L. Laperriere, J. Greenspan, and W. Zhao, “Feasibility of amorphous selenium based photon counting detectors for digital breast tomosynthesis”, Proc. SPIE 7258, 72581G (2009).
  37. Y.-H. Hu and W. Zhao, “Nonuniform angular dose distribution in digital breast tomosynthesis for increased conspicuity of small high contrast objects”, Proc. SPIE 7258, 72580Q (2009).
  38. Y.-H. Hu and W. Zhao, “Image artifact in digital breast tomosynthesis and its dependence on system and reconstruction parameters”, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), v 5116 LNCS, p 628-634, 2008, Digital Mammography – 9th International Workshop, IWDM 2008.
  39. T. Mertelmeier, J. Ludwig, B. Zhao and W. Zhao, “Optimization of tomosynthesis acquisition parameters”, Angular range and number of projections”, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), v 5116 LNCS, p 220-227, 2008, Digital Mammography – 9th International Workshop, IWDM 2008.
  40. W. Zhao, D. Li, J. A. Rowlands, N. Egami, Y. Takiguchi, M. Nanba, Y. Honda, Y. Ohkawa, M. Kubota, K. Tanioka, K. Suzuki and T. Kawai, “A indirect flat-panel detector with avalanche gain for low-dose x-ray imaging: SAPHIRE (Selenium Avalanche Photoconductor with High Resolution Emitter readout)”, Proc. SPIE 6913, 69130M (2008).
  41. A. R. Lubinsky, W. Zhao and K. Suzuki, “Screen optics effects on DQE in digital radiography: Spatial frequency effects”, Proc. SPIE 6913, 69134F (2008).
  42. D. Li and W. Zhao, “Avalanche Detector with Field Emitter Readout”, Proceedings of the 33rd Annual Northeast Bioengineering Conference, pp. 67~68, (2007).
  43. B. Zhao and W. Zhao, “A three-dimensional linear model for breast tomosynthesis”, Proceedings of the 33rd Annual Northeast Bioengineering Conference, pp. 163-164, (2007).
  44. J. A. Segui and W. Zhao, “Development of a TLM to investigate the effect of a resistive interface in digital flat panel x-ray detectors”, Proceedings of the 33rd Annual Northeast Bioengineering Conference, pp. 88-89, (2007).
  45. W. Zhao, B. Zhao, P. R. Fisher, P. Warmoes, T. Mertelmeier and J. Orman, “Optimization of detector operation and imaging geometry for breast tomosynthesis”, Proc SPIE 6517, 57 (2007).
  46. J. Lehnert and W. Zhao, “High voltage protection in active matrix flat-panel imagers”, Proc. SPIE 6142, 0S-1-10 (2006).
  47. K Wang, Y He, H Qin, P. R. Fisher and W. Zhao, “Temporal registration of 2D x-ray mammogram using triangular B-splines finite element method (TBFEM)”, Proc. SPIE 6144, 614436-1 (2006).
  48. K. Wang, H. Qin, P. R. Fisher, and W. Zhao, “Automatic Registration of Mammograms using Texture-based Anisotropic Features,” Proceedings of 2006 IEEE International Symposium on Biomedical Imaging: From Nano to Macro, Arlington, Virginia, USA, April 6-9, 2006.
  49. W. Zhao, D. Li, A. Reznik, B. J. M. Lui, D. C. Hunt, K. Tanioka and J. A. Rowlands, “Indirect flat-panel detectors with avalanche gain: Design and operation of the avalanche photoconductor”, Proc. SPIE 5745, 352-360 (2005).
  50. W. Zhao, R. Deych and E. Dolazza, “Optimization of operational conditions for direct digital mammography detectors for digital tomosynthesis”, Proc. SPIE 5745, 1272-1281 (2005).
  51. J. A. Segui and W. Zhao, “Performance of Direct and Indirect Detection Methods for Digital Mammography”, in Proceedings of the 7th International Workshop on Digital Mammography, Durham, NC, 2004.
  52. B. Zhao and W. Zhao, “Lag and ghosting of amorphous selenium mammography detectors”, in Proceedings of the 7th International Workshop on Digital Mammography, Durham, NC, 2004.
  53. W. Zhao, D. C. Hunt, K. Tanioka and J. A. Rowlands, “Indirect flat-panel detectors with avalanche gain”, Proc. SPIE 5368, 150-161 (2004).
  54. W. Zhao, G. Ristic and J. A. Rowlands, “Inherent imaging performance of structured CsI”, Proc. SPIE 5368, 211-220 (2004).
  55. B. Zhao and W. Zhao, “Characterization of a direct, full-field flat-panel digital mammography detector”, Proc. SPIE 5030, 157-167 (2003).
  56. W. Zhao, G. DeCrescenzo and J. A. Rowlands, “Investigation of lag and ghosting in a-Se flat-panel detectors”, Proc. SPIE 4682, 9-20 (2002).
  57. W. 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 (2000).
  58. J. A. Rowlands, W. G. Ji and W. 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 (2000)
  59. W. 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”, to appear in the Proceedings for the 5th International Workshop on Digital Mammography, 2000.
  60. J. A. Rowlands, W. G. Ji, W. 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).
  61. G. Pang, W. Zhao, R. Luhta and J. A. Rowlands, “Electronic portal imaging device (EPID) based on a novel camera with avalanche multiplication”, Proc. SPIE 3336, 195-201 (1998).
  62. D. C. Hunt, W. Zhao and J. A. Rowlands, “Detective quantum efficiency of direct flat-panel x-ray imaging detectors for fluoroscopy”, Proc. SPIE 3336, 408-417 (1998).
  63. J. A. Rowlands, W. Zhao, I. Blevis, S. Germann, D. Waechter and Z. Huang, “Flat panel detector for digital radiology using active matrix readout of amorphous selenium”, Medical Imaging 1997: Physics of Medical Imaging, Proc. SPIE 3032, 97-108 (1997).
  64. W. 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).
  65. W. 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).
  66. W. 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).
  67. W. 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).