Open AccessRelationship between the radiation doses at nonenhanced CT studies using different tube voltages and automatic tube current modulation during anthropomorphic phantoms of young children
Author(s) -
Masuda Takanori,
Funama Yoshinori,
Kiguchi Masao,
Osawa Kazuaki,
Suzuki Syouichi,
Oku Takayuki,
Sugisawa Koichi,
Shouji Tomokazu,
Awai Kazuo
Publication year - 2017
Publication title -
journal of applied clinical medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.83
H-Index - 48
ISSN - 1526-9914
DOI - 10.1002/acm2.12192
Subject(s) - dosimeter , imaging phantom , nuclear medicine , medicine , tube (container) , radiation dose , image noise , radiation exposure , radiation , noise (video) , dosimetry , radiology , materials science , optics , physics , image (mathematics) , artificial intelligence , computer science , composite material
To compare the radiation dose and image noise of nonenhanced CT scans performed at 80, 100, and 120 kV p with tube current modulation ( TCM ) we used anthropomorphic phantoms of newborn, 1‐year‐old, and 5‐year‐old children. The noise index was set at 12. The image noise in the center of the phantoms at the level of the chest and abdomen was measured within a circumscribed region of interest. We measured the doses in individual tissues or organs with radio‐photoluminescence glass dosimeters for each phantom. Various tissues or organs were assigned and the radiation dose was calculated based on the international commission on radiological protection definition. With TCM the respective radiation dose at tube voltages of 80, 100, and 120 was 29.71, 31.60, and 33.79 mG y for the newborn, 32.00, 36.79, and 39.48 mG y for the 1‐year‐old, and 32.78, 38.11, and 40.85 mG y for the 5‐year‐old phantom. There were no significant differences in the radiation dose among the tube voltages and phantoms ( P > 0.05). Our comparison of the radiation dose using anthropomorphic phantoms of young children showed that the radiation dose of nonenhanced CT performed at different tube voltages with TCM was not significantly different.