Pictured: Guang Li, PhD

I am an assistant attending physicist in the Department of Medical Physics with certification from the American Board of Radiology and a license from the state of New York. My clinical research focuses on using image guidance systems to track patient motion in treatment planning and to improve the precision of radiation treatment delivery.

In particular, I am interested in combining three- and four-dimensional optical surface imaging with internal imaging techniques such as CT, MRI, and PET to develop biomechanical and biostatistical models that can predict and verify the position of a targeted tumor and organ motion.

I have established four clinical research programs for patients with brain, head and neck, and breast cancers. In these programs, we are studying radiation therapy techniques such as frameless stereotactic radiosurgery, stereotactic body radiotherapy, and other novel clinical procedures to more effectively target radiation to tumors and spare healthy tissue.

In another research program, we are evaluating ways to account for the effect of breathing on tumor position in patients with lung, liver, and pancreatic cancer.