At City of Hope since 2002, Dr. Chen is responsible for the GI Oncology Program within the Division of Radiation Oncology. He is a member of the NCCN Colon/Rectal/Anal Cancer Guideline Panel. His major research interests include novel combined chemoradiation therapy for gastrointestinal cancer, image-guided conformal radiotherapy such as Helical TomoTherapy, intensity modulated radiation therapy (IMRT) and brachytherapy for breast cancer, head and neck cancer, prostate cancer, and gynecologic cancer.