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Item 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 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