Keywords:
Experimental, Not applicable, Education and training, Radiation safety, CT, Radioprotection / Radiation dose, Radiation Protection, Performed at one institution
Authors:
A. Chau1, C. Chan1, J. Cheung1, C. He2, J. Wang2; 1Hong Kong/HK, 2Shenzhen/CN
DOI:
10.26044/ecr2020/C-00824
Methods and materials
A female adult anthropomorphic phantom (702D CIRS ATOM) inserted with thermoluminescence dosimeters chips (LiF TLD100 Thermo Scientific) underwent CT chest by a 64-row Siemens Somatom Definition AS. Radiation protective devices were applied (Figures 3 to 5) except for the first scan. Lead rubber collar was not tested in this study to mimic the local clinical practice.
TLD chips were placed and sandwiched inside pre-drill organ holes of the phantom. At least three TLD chips were placed in each hole. All holes of an organ were placed with TLD chips (Fig 6).
Absorbed doses of the brain, the eyes, the thyroid, the ovaries, the uterus, the bladder, as well as the abdominal organs of the phantom were calculated. Independent sample t-test was performed to reveal the difference of absorbed doses of the head and pelvic organs between using and without using protective devices. ANOVA tests were performed to compare differences of absorbed doses of the pelvic organs by covering the phantom with a half lead skirt at the front, half lead skirts at the front and at the back, and a wrap-around lead drape.