Bio sketch and research interests: Dr. Zhang received her Ph.D. in Biomedical Engineering in 2004 from the University of Michigan, Ann Arbor, where she focused on developing a Compton gamma-ray imaging probe for high resolution and high sensitivity imaging of prostate and breast. After graduation, she then joined the Radiation Oncology Department of Washington University in St. Louis for her medical physics residency training. She received comprehensive training in all aspects of clinical radiotherapy physics during her residency and joined the Department of Radiation Oncology at VCU in 2007. She left VCU in 2011 and rejoined the department in 2013. Her research interests include characterization of OBI photon spectrum and its impact on the reconstructed images and image guided high dose rate brachytherapy.