Joe Y. Chang, M.D., Ph.D., is a Tenured Professor of Radiation Oncology, Clinical Section Chief of Thoracic Radiation Oncology, Director of Stereotactic Radiotherapy Program, MD Anderson Cancer Center. He is a world known expert in lung cancer particularly for stereotactic radiotherapy, proton therapy and image guided radiotherapy. Dr. Chang is co-chair of lung cancer expert panel of the American College of Radiology, Senior-associate editor of the Journal of Radiation Oncology, Biology and Physics and president of Sino-American Network of Therapeutic Radiology and Oncology. He serves as an editorial board member for several international journals and has published over 100 peer-reviewed articles and 18 book chapters. He is also co-editor for a several test books. He has served as principal investigator for several institutional, national and international clinical research studies.