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Assessment of Radiation Exposure and Attributed Risk During Chest, Abdominal and Pelvic Computed Tomography Procedures

Adult patients' exposure and ascribed cancer risk were calculated using CT-Expo dosimetry software. A total of eight CT scanners and 395 examination patients were used in the study. The predicted effective dose values for chest CT, abdominal CT, and pelvic CT were 8.0mSv, 10.9mSv, and 5.6mSv, respectively. The estimated dose–length product to effective dose (ICRP 103) conversion coefficients for chest CT, abdominal CT, and pelvic CT were 0.020mSv•mGy-1, 0.016mSv•mGy-1, and 0.013mSv•mGy-1, respectively. In chest CT, organ doses were 16.6mSv (lung), 14.9mSv (esophagus), and 10.8mSv (breast); in abdominal CT: 15.5mSv (stomach) and 13.7mSv (liver); and in pelvic CT: 17.9mSv (bladder) and 11.3mSv (colon). The estimated cancer incident cases per million were 168 for lung cancer (chest CT) and 103 for stomach cancer (abdominal CT). The study allows comparing the risk of CT examinations to those of other radiological procedures.