Adaptive-Iterative-Dose-Reduction 3D with multisector-reconstruction method in 320-slice CT may maintain accurate-measurement of the Agatston-calcium-score of severe-calcification even at higher pulsating-beats and low tube-current in vitro

摘要

To reduce radiation exposure in 320 slice computed tomography (CT), a volume exposure control (VEC) system, is used frequently. The VEC system considers the degree of transmission of radiation, which correlates strongly with the body mass index and the degree of obesity and reduces the tube current. The information is acquired from scout images and its validity is achieved as a reduction of tube current, especially in non-obese subjects. However, if tube current is reduced, image noise may increase, especially in pulsating heart images.