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- Title
Estimate of organ radiation absorbed doses in clinical CT using the radiation treatment planning system.
- Authors
Fujibuchi, Toshioh; Funabashi, Nobusada; Hashimoto, Masatoshi; Kato, Hideyuki; Kurokawa, Masayuki; Deloar, Hossain M.; Kunieda, Etsuo; Komuro, Issei; Sakae, Takeji
- Abstract
Organ absorbed doses in computed tomography (CT) scans can be measured with anatomical phantoms but not inside the human body. In this study, a straightforward method was investigated to estimate organ doses in clinical CT using the radiation treatment planning system (RTPS) and compared them with experimental results of photoluminescence dosemeters (PLD). In a heterogeneous phantom, the average difference between PLD and RTPS values were −5.0 % for the body and 7.1 % for the lung. Using CT data, organ doses in 30 clinical cases were then calculated. There was a significant inverse correlation between the calculated values of organ doses and body mass index (BMI, correlation coefficients (r)=−0.69 (whole body), −0.80 (right lung), −0.81 (left lung), −0.76 (spinal cord), −0.74 (vertebra bone), −0.74 (heart), and −0.79 (oesophagus), all p < 0.01). An RTPS can be a simple and useful tool for estimating equivalent doses inside the human body, during whole-body CT scans.
- Subjects
TOMOGRAPHY; RADIATION; PHOTOLUMINESCENCE; BODY mass index; MEDICAL imaging systems
- Publication
Radiation Protection Dosimetry, 2010, Vol 142, Issue 2-4, p174
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncq188