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
Source: Radiation Protection Dosimetry, Volume 142, Numbers 2-4, 8 December 2010 , pp. 174-183(10)
Publisher: Oxford University Press
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.
Document Type: Research Article
Publication date: 2010-12-08
- RPD publishes peer-reviewed papers covering all aspects of personal and environmental dosimetry and monitoring for both ionising and non-ionising radiations. This includes biological aspects, physical concepts, biophysical dosimetry, external and internal personal dosimetry and monitoring, environmental and workplace monitoring and accident dosimetry and dosimetry related to the protection of patients.