The Analysis of Exposure Dose Related Factors in Abdominal CT of General Hospitals in Daejeon Area

This study intends to investigate whether radiation dose increases as the number of detectors in MDCT (Multi Detector Computed Tomography) increases through abdominal and pelvis CT examination and whether there is a difference in dose depending on the CT equipment, and to analyse associated factors. targeting 1,038 subjects who underwent abdominal and pelvis CT examination together, it was examined whether there was a difference in radiation dose depending on the number of CT detector and manufacturer by applying corresponding variables to the radiation dose management program distributed by the MFDS (Ministry of Food and Drug Safety), based on gender, total CTDI (Computed Tomography Dose Index), total DLP (Dose Length Product), total mAs, and scan area, which may be associated with the radiation dose. 64 detector had average 15.9(±4.9)mSv, while 128 defector had 10.8(±2.6)mSv. 64 detector showed 1.47 times higher dose difference. It can be seen as a result of efforts for reducing radiation dose in each equipment manufacture as a measure of reduction to decrease radiation dose as well as evaluation for patient radiation does. Keywords: CTDI (Computed Tomography Dose Index), DLP (Dose Length Product), MDCT (Multi Detector Computed Tomography), mSv, Radiation Dose