Hui Zhao, PhD, DABR

Research Interests

  • Radiosurgery
  • Radiotherapy
  • Image Guided Radiation Therapy (IGRT)
  • Surface Imaging (VisionRT and HumediQ)
  • CT-on-Rails
  • kV and MV Cone-Beam CT
  • Ultrasound (Clarity and BAT)
  • Calypso
  • Intra- and Inter-fractional Tumor Motion
  • Adaptive Radiation Therapy
  • Gated Delivery
  • Stereotactic Radiosurgery (SRS)
  • Stereotactic Body Radiation Therapy (SBRT)


  • English

Academic Information

  • Departments: Radiation Oncology - Associate Professor (Clinical)

Board Certification

  • American Board of Radiology (Radiation Oncology)

Academic Bio

Hui Zhao, PhD, is an Associate Professor in the Department of Radiation Oncology at the University of Utah and a medical physicist at Huntsman Cancer Hospital (HCH).

Dr. Zhao specializes in the physics of image-guided radiation therapy (IGRT), surface-guided radiation therapy (SGRT), stereotactic body radiation therapy (SBRT), stereotactic radiosurgery (SRS), high dose rate brachytherapy (HDR), and low dose rate brachytherapy (LDR).

Dr. Zhao obtained her B.S. degree in Modern Physics from University of Science and Technology of China (USTC). She received a Ph.D. in Medical Physics from University of Wisconsin – Madison in 2005. Dr. Zhao is an active member of American Association of Physicists in Medicine (AAPM).

Before joining HCH, Dr. Zhao completed a residency in clinical radiation oncology physics in the Radiation Oncology Department of Washington University in St. Louis. Her clinical and research interests include image-guided radiation therapy (IGRT), surface-guided radiation therapy (SGRT), and adaptive radiation therapy.

Education History

Type School Degree
Residency Washington University in St. Louis
Radiation Oncology Physics
Postdoctoral Fellowship University of Wisconsin School of Medicine and Public Health
Medical Physics
Postdoctoral Fellow
Doctoral Training University of Wisconsin School of Medicine and Public Health
Medical Physics
Graduate Training University of Wisconsin School of Medicine and Public Health
Medical Physics
Undergraduate University of Science and Technology of China
Modern Physics

Global Impact

Education History

Type School Degree Country
Undergraduate University of Science and Technology of China
Modern Physics
B.S. China

Selected Publications

Journal Article

  1. Hui Zhao, Adam Paxton, Vikren Sakar, Y Jessica Huang, Fan-Chi Frances Su, Christine Haacke, Prema Rassiah-Szegedi, Martin Szegedi, Bill Salter (2020). Prevention of radiation therapy treatment deviations by a novel combined biometric, radio-frequency identification, and surface imaging system. 2020(S1879-8500(20)), 30213-7.
  2. Prema Rassiah, Fan-Chi Frances Su, Y Jessica Huang, Dan Spitznagel, Virkren Sarkar, Martin Szegedi, Hui Zhao, Adam Paxton, Geoff Nelson, Bill Salter (2020). Using failure mode and effects analysis (FMEA) to generate an initial plan check checklist for improved safety in radiation treatment. J Appl Clin Med Phys, 2020:10.1002(10.1002).
  3. Hui Zhao, Ned Williams, Matthew Poppe, Vikren Sarkar, Brian Wang, Prema Rassiah-Szegedi, Y Jessica Huang, Kristine Kokeny, David Gaffney, Bill Salter (2019). Comparison for surface guidance and target matching for image guided accelerated partial breast irradiation (APBI). Med Phys, 2019 Sep 11.
  4. Vikren Sarkar, Adam Paxton, Jeremy Kunz, Martin Szegedi, Geoff Nelson, Prema Rassiah-Szegedi, Hui Zhao, Y Jessica Huang, Frances Su, Bill Salter (2019). A systematic evaluation of the error detection abilities of a new diode transmission detector. J Appl Clin Med Phys, 2019 Aug, 1-11.
  5. Zhao H, Sarkar V, Wang B, Rassiah-Szegedi P, Szegedi M, Huang YJ, Huang L, Tward J, Salter B (2019). Calculation of delivered composite dose from Calypso tracking data for prostate cancer: and subsequent evaluation of resendable treatment interruption tolerance limits. J Appl Clin Med Phys, 2019 Aug(20(8)), 105-113.
  6. Sarkar V, Lloyd S, Paxton A, Huang L, Su FC, Tao R, Tward J, Zhao H, Salter B (2018). Daily breathing inconsistency in pancreas SBRT: a 4DCT study. J Gastrointest Oncol, 2018 Dec(9(6)), 989-995.
  7. Huang YJ, Su FF, Gaffney DK, Kokeny KE, Zhao H, Rassiah-Szegedi P, Salter BJ, Poppe MM (2018). Skin dose estimation using virtual structures for Contura Multi-Lumen Balloon breast brachytherapy. Brachytherapy, 2018 Nov-Dec(17(6)), 956-965.
  8. Sarkar V, Paxton A, Szegedi MW, Zhao H, Huang L, Nelson G, Huang YJ, Su F, Rassiah-Szegedi P, Salter B (2018). An evaluation of the consistency of shifts reported by three different systems for non-coplanar treatments. J Radiosurg SBRT, 2018(5(4)), 323-330.
  9. Hui Zhao, Vikren Sarkar, Long Huang, Brian Wang, Prema Rassiah-Szegedi, Y Jessica Huang, Martin Szegedi, Victor Gonzalez, Bill Salter (2017). Preferred treatment position between supine and prone for pelvic radiation therapy; quantification of the intrafractional body motion component by 3D surface imaging system. 2017, Vol 5(No 1).
  10. Salter BJ, Szegedi M, Boehm C, Sarkar V, Rassiah-Szegedi P, Wang B, Zhao H, Huang J, Huang L, Kokeny K, Tward JD (2017). Comparison of 2 transabdominal ultrasound image guidance techniques for prostate and prostatic fossa radiation therapy. Pract Radiat Oncol, 7(2), e99-e107.
  11. Zhao H, Wang B, Sarkar V, Rassiah-Szegedi P, Huang YJ, Szegedi M, Huang L, Gonzalez V, Salter B (2016). Comparison of surface matching and target matching for image-guided pelvic radiation therapy for both supine and prone patient positions. J Appl Clin Med Phys, 17(3), 5611.
  12. Sarkar V, Huang L, Huang YJ, Szegedi MW, Rassiah-Szegedi P, Zhao H, Salter BJ (2016). Head to head comparison of two commercial phantoms used for SRS QA. 2016(4(3)), 213-223.
  13. Huang YJ, Harrison A, Sarkar V, Rassiah-Szegedi P, Zhao H, Szegedi M, Huang L, Wilson B, Gaffney DK, Salter BJ (2016). Detection of late radiation damage on left atrial fibrosis using cardiac late gadolinium enhancement magnetic resonance imaging. Adv Radiat Oncol, 1(2), 106-114.
  14. Sarkar V, Huang L, Huang Y-HJ, Szegedi MW, Rassiah-Szegedi P, Zhao H, Hitchcock YJ, Kokeny KE, Wang B, Salter BJ (2016). Dosimetric evaluation of abdominal compression as a method to reduce the incidence of radiation-induced pneumonitis in lung SBRT treatment. J Radiosurg SBRT, 4(2), 125-32.
  15. Sarkar V, Huang L, Rassiah-Szegedi P, Zhao H, Huang J, Szegedi M, Salter BJ (2015). Planning for mARC treatments with the Eclipse treatment planning system. J Appl Clin Med Phys, 16(2), 5351.
  16. Sarkar V, Wang B, Zhao H, Lynch B, James JA, McCullough KT, Salter BJ (2015). Percent depth-dose distribution discrepancies from very small volume ion chambers. J Appl Clin Med Phys, 16(2), 5230.
  17. Rassiah-Szegedi P, Szegedi M, Sarkar V, Streitmatter S, Huang YJ, Zhao H, Salter B (2014). Dosimetric impact of the 160 MLC on head and neck IMRT treatments. J Appl Clin Med Phys, 15(6), 4770.
  18. Szegedi M, Rassiah-Szegedi P, Sarkar V, Hinkle J, Wang B, Huang YH, Zhao H, Joshi S, Salter BJ (2012). Tissue characterization using a phantom to validate four-dimensional tissue deformation. Med Phys, 39(10), 6065-70.
  19. Chang AJ, Zhao H, Wahab SH, Moore K, Taylor M, Zoberi I, Powell SN, Klein EE (2012). Video surface image guidance for external beam partial breast irradiation. Pract Radiat Oncol, 2(2), 97-105.
  20. Szegedi M, Sarkar V, Rassiah-Szegedi P, Wang B, Huang YJ, Zhao H, Salter B (2012). 4D CT image acquisition errors in SBRT of liver identified using correlation. J Appl Clin Med Phys, 13(1), 3564.
  21. Rassiah-Szegedi P, Wang B, Szegedi M, Tward J, Zhao H, Huang YJ, Sarkar V, Shrieve D, Salter B (2011). Individualized margins for prostate patients using a wireless localization and tracking system. J Appl Clin Med Phys, 12(3), 3516.
  22. Wang B, Rassiah-Szegedi P, Zhao H, Huang YJ, Sarkar V, Szegedi M, Kokeny KE, Anker CJ, Shrieve DC, Salter BJ (2011). Initial experience and clinical comparison of two image guidance methods for SBRT treatment: 4DCT versus respiratory-triggered imaging. J Appl Clin Med Phys, 12(3), 3429.
  23. Zhao H, Cuneo BF, Strasburger JF, Huhta JC, Gotteiner NL, Wakai RT (2008). Electrophysiological characteristics of fetal atrioventricular block. J Am Coll Cardiol, 51(1), 77-84.
  24. Almony A, Breit S, Zhao H, Garcia-Ramirez J, Mansur DB, Harbour JW (2008). Tilting of radioactive plaques after initial accurate placement for treatment of uveal melanoma. Arch Ophthalmol, 126(1), 65-70.
  25. Cuneo BF, Zhao H, Strasburger JF, Ovadia M, Huhta JC, Wakai RT (2007). Atrial and ventricular rate response and patterns of heart rate acceleration during maternal-fetal terbutaline treatment of fetal complete heart block. Am J Cardiol, 100(4), 661-5.
  26. Zhao H, Chen M, Van Veen BD, Strasburger JF, Wakai RT (2007). Simultaneous fetal magnetocardiography and ultrasound/Doppler imaging. IEEE Trans Biomed Eng, 54(6 Pt 2), 1167-71.
  27. Zhao H, Strasburger JF, Cuneo BF, Wakai RT (2006). Fetal cardiac repolarization abnormalities. Am J Cardiol, 98(4), 491-6.
  28. de Araujo DB, Barros AK, Estombelo-Montesco C, Zhao H, da Silva Filho AC, Baffa O, Wakai R, Ohnishi N (2005). Fetal source extraction from magnetocardiographic recordings by dependent component analysis. Phys Med Biol, 50(19), 4457-64.
  29. Zhao H, Wakai RT (2002). Simultaneity of foetal heart rate acceleration and foetal trunk movement determined by foetal magnetocardiogram actocardiography. Phys Med Biol, 47(5), 839-46.
  30. Wakai RT, Chen M, Zhao H, Van Veen B, Strasburger J (2001). Assessment of fetal rhythm at 20 weeks’ gestation by fetal magnetocardiography. Biomed Tech (Berl), 46(Suppl 2), 188-90.

Conference Proceedings

  1. Wakai R, Zhao H, Strasburger J (2005). Combined fetal ultrasound and magnetocardiography. IEEE Eng Med Biol Soc, 5, 5585-6.
  2. de Araujo D, Barros AK, Baffa O, Wakai R, Zhao H, Ohnishi N (2003). Fetal magnetocardiographic source separation using the poles of the autocorrelation function. Proceedings of the 4th International Symposium on Independent Component Analysis and Blind Source Separation, 2003, 833-6.
  3. H Zhao, RT Wakai, J Strausburger, N Gotteiner, B Cuneo (2002). Assessment of fetal heart rhythm and rate in complete congenital heart block by fetal magnetocardiography. Proceedings of the 13th International Conference on Biomagnetism 2002, 2002.

Case Report

  1. Cuneo BF, Ovadia M, Strasburger JF, Zhao H, Petropulos T, Schneider J, Wakai RT (2003). Prenatal diagnosis and in utero treatment of torsades de pointes associated with congenital long QT syndrome. Am J Cardiol, 91(11), 1395-8.