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Item Metadata only The application of channelized hotelling observer in lesion detection in hepatic SPECT images(Mahidol University. Mahidol University Library and Knowledge Center, 2008) Tawatchai EkjeenItem Metadata only An evaluation of physical performance of conventional x-ray machine using computed radiography system(Mahidol University. Mahidol University Library and Knowledge Center, 2008) Tipvimol MeechaiItem Metadata only Planning target volume (PTV) margin determination from Marker-based and the Exactrac 6D X-Ray IGRT system in prostate cancer patients(Mahidol University. Mahidol University Library and Knowledge Center, 2018) Siwadol Pleanarom; Lalida Tuntipumiamorn; Pittaya Dankulchai, 936 stereoscopic x-ray images and 271 cone beam computed tomography (CBCT) images from the On-Board Imager system were obtained for the analysis. Data of the setup deviations from three setup techniques, including initial laser setting up, marker...Modern technology, such as intensity modulated and image-guided radiation therapy, have revolutionized radiation treatment with improved outcome and reduced toxicity. However, radiotherapy is a complex process and potential errors can occur in each