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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 Measurement of radiation exposure in diagnostic x-ray energy range using photostimulable phosphor plate(Mahidol University. Mahidol University Library and Knowledge Center, 2008) Wiwat Owasirikul; Chavalit Wongse-EkItem Metadata only Dosimetric characterization of patients undergoing common radiological examination using IAEA technical report series no.457 protocol : a study of a phantom at Phyathai 2 Hospital(Mahidol University. Mahidol University Library and Knowledge Center, 2009) Tulpreeda Srisa-Ard; Napapong PongnapangItem Open Access Brain hemorrhage segmentation in ct scan images using deep learning based approach(Mahidol University. Mahidol University Library and Knowledge Center, 2022) Zhang, Haibin, 1993-; Worapan Kusakunniran; Thanongchai Siriapisith; Pairash SaiviroonpornCerebral hemorrhage is a major cause of brain death with high early mortality and severe sequelae. Subarachnoid hemorrhage, a type of cerebral hemorrhage with small area measures and irregular shapes, is particularly difficult for image segmentation...; therefore, rapid and accurate judgments of CT images of cerebral hemorrhage are vital to reduce mortality and sequelae. This research aims to propose an improved active learning method based on a convolutional neural network for small lesion cerebralItem Metadata only Comparative penumbral widths for small fields of 6 MV photon beam(Mahidol University. Mahidol University Library and Knowledge Center, 2014) Sukesorn Panyawong; Puangpen Tangboonduangjit; Lalida Tuntipumiamorn(EDR2 and EBT2) were used as a reference penumbral width measurement for comparison.AVidar scanner and the ImageJ software were used for film scanning analysis at resolution of 0.36 mm/pixel (71 DPI). The film calibration curves were fitted using a...อ้างอิงในการเปรียบเทียบบริเวณขอบพื้นที่รังสี Vidar scanner และ imageJ software ใช้ในการประมวลผลด้วยความละเอียด 0.36 มิลลิเมตรต่อพิกเซลและใช้สมการ polynomial กำลังสองในการสร้างcalibration curvesของฟิล์ม ค่าต่ำสุดและสูงสุดของบริเวณขอบพื้นที่รังสีที่วัดด้วยItem 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 eachItem Metadata only Optimized radiation dose and image quality for abdominal CT protocol : phantom study(Mahidol University. Mahidol University Library and Knowledge Center, 2018) Saimai Siangyai; Malulee Tuntawiroon; Dittapong SongsaengThis study aims to determine the appropriate radiation dose to achieve an acceptable image quality of an abdominal body phantom when varying the Noise Index in the routine abdominal CT scan protocol at Siriraj Diagnostic Imaging Center, using 2 CT... systems, GE Medical System, Model VCT Light Speed and Model HD750. The radiation Noise Index of CT images was measured on standard, large and very large size phantoms. Radiation doses were recorded using fix mode (500 mA) and auto modulation (Noise Index 0