PURPOSE: The weighted computed tomography dose index (CTDIw ) uses measured CTDI values at the center and periphery of a cylindrical phantom. The CTDIw value is calculated using conventional, Bakalyar's, and Choi's weighting factors. However, thes...
Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB) 44 227-231 2017年12月 [査読有り]
PURPOSE: We have proposed a method for determining the half-value layers (HVL) in dual-source dual-energy computed tomography (DS-DECT) scans without the need for the X-ray tubes to be fixed. METHODS: A custom-made lead-covered case and an ionizin...
Yuta Matsunaga   Ai Kawaguchi   Masanao Kobayashi   Shoichi Suzuki   Yasuki Asada   Kiyoshi Ito   Koichi Chida   
Journal of applied clinical medical physics 18(5) 330-335 2017年9月 [査読有り]
This study aimed to examine the relationship between fetal dose and the dose-length product, and to evaluate the impact of the number of rotations on the fetal doses and maternal effective doses using a 320-row multidetector computed tomography un...
Radiological physics and technology 10(2) 148-154 2017年6月 [査読有り]
The purposes of this study were (1) to compare the radiation doses for 320- and 80-row fetal-computed tomography (CT), estimated using thermoluminescent dosimeters (TLDs) and the ImPACT Calculator (hereinafter referred to as the "CT dosimetry soft...