Dr. O'Connell received his bachelor's degree in Physics from Tufts University in 2013, and his Ph.D in Biomedical Physics from UCLA in 2018. He completed the 2-year medical physics residency program also at UCLA before joining the faculty in 2020. His research interests include improving 4DCT reconstruction using a respiratory motion model, motion compensated cone-beam CT reconstruction, online adaptive therapy, and in-house clinical software safety.