35 Calculation of organ doses for CT examination

• Published in: Physica medica 2018-12, Vol.56, p.55-56
• Main Authors: Julien, T., Al Masri, A., Guérin, L., Battini, S., Maaloul, F.
• Format: Article
• Language: English
• ISSN: 1120-1797; 1724-191X
• DOI: 10.1016/j.ejmp.2018.09.117

Ionising radiation needs to be precisely evaluated since CT scan is the main radiological examination today. Biological effects caused by radiation are estimated with computational methods as it’s not possible to measure the real doses delivered directly to a specific organ. The DOSITRACE software is a Dose Archiving and Communication System (DACS) based on a new calculation method which allows a more reliable estimation of organ doses. The aim of this study was to compare our results with the results given by the VIRTUALDOSE [1] software using the Monte-Carlo method. CTDIvol, current and rotation time for each acquisition were used to calculate organ doses (ICPR). Four CT protocols (abdomen-pelvis, chest-abdomen-pelvis, chest and thorax) were used with three different CT scans. Thirty patients were selected for each protocol. In total, CT scan exams were analysed and our results were compared with the ones obtained with the VIRTUALDOSE software. There was only a 20% difference in the estimation of organ doses between the VIRTUALDOSE and DOSITRACE software’s results which is not statistically significant. We demonstrated that DOSITRACE is a reliable software in order to calculate organ doses.