David A. Bush

David A. Bush is a Professor of Radiation Medicine at Loma Linda University School of Medicine, with a focus on clinical affairs as Vice Chair. His research spans proton beam therapy, radiation oncology, and medical physics, targeting cancers such as prostate, hepatocellular, lung, and breast. He holds a Doctor of Medicine from Loma Linda University (1992) and a Bachelor of Arts from Westmont College (1986).

• Education
  • MD, Loma Linda University, 1992
  • BA, Westmont College, 1986

His research emphasizes proton therapy for precise tumor targeting, reducing toxicity in pediatric medulloblastoma, improving quality of life post-treatment, and comparing proton therapy with conventional methods like IMRT and transarterial chemoembolization. Key projects include hypofractionation for prostate cancer, partial breast irradiation, and hepatocellular carcinoma downstaging for liver transplants.

Recent publications analyze proton therapy trends in esophageal cancer, hepatocellular carcinoma, and prostate cancer, highlighting clinical outcomes, dosimetric advantages, and comparative efficacy. He has contributed to NRG Oncology trials and RTOG studies, evaluating radiotherapy duration and toxicity reduction.

Service roles include Vice Chairman of Clinical Affairs in Radiation Medicine, Institutional Review Board (IRB) membership, and participation in the Thoracic Tumor Board (2006–2007). His work bridges clinical practice, research, and medical education.