Effective patient dose during neuroradiological C-arm CT procedures

• Published in: Diagnostic and Interventional Radiology
• Main Authors: Mei Bai, Xianghua Liu, Bin Liu
• Format: Article
• Language: English
• Published: Turkish Society of Radiology 2013-01-01
• Online Access: http://www.dirjournal.org/archives/archive-detail/article-preview/effective-patient-dose-during-neuroradiological-c-/56786

PURPOSEWe aimed to determine the effective dose given to patients during neuroradiological C-arm computed tomography (CT) procedures.MATERIALS AND METHODSMATERIALS AND METHODSMeasurements were performed on 48 patients using a dose-area product (DAP) meter. A PC-based Monte Carlo program (PCXMC, STUK, Helsinki, Finland) was used to calculate the effective dose from the DAP values of each patient. Organ doses were also measured with thermoluminescent dosimeters (TLDs) using a human-shaped phantom. RESULTSThe difference between the organ doses measured using TLDs and PCXMC was not significant (P > 0.05). The mean DAP for 48 patients was 9.41±2.50 Gy·cm2. ; the mean effective dose for all procedures was 0.30±0.08 mSv. The coefficient for the correlation (R 2 2 ) between the DAP and the effective dose was 0.97. The conversion factor between the effective dose and DAP was 0.030–0.035 mSv·Gy-1 ·cm-2 .CONCLUSIONDAP can be used as a dose indicator to calculate the organ dose and effective dose of patients based on Monte Carlo simulation. This method can provide important information on the absorbed dose and enhance the radiation protection of patients during C-arm CT procedures.