Pleanarom, S., Tuntipumiamorn, L. and Dankulchai, P. 2017. Planning Target Volume (PTV) Margin Determination from Marker-Based Setup and The ExacTrac 6D X-ray IGRT System in Prostate Cancer Patients. Journal of Thai Association of Radiation Oncology. 23, 1 (Jun. 2017), 13–18.