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Assessment of Radiation-Induced Cancer Risk to Patients Undergoing Computed Tomography Angiography Scans Publisher



Chaparian A1 ; Zarchi HK2
Authors
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Authors Affiliations
  1. 1. Technology of Radiology Department, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Department of Medical Physics, Shahid Sadoughi University of Medical Sciences, Yazd, Iran

Source: International Journal of Radiation Research Published:2018


Abstract

Background: Computed tomography angiography (CTA) scan is a suitable imaging technique to evaluate the blood vessels. However, one major disadvantage is the potenal risk of cancer related to ionizing radiaon exposure during the procedures. The aim of this invesgaon was to esmate the risk of exposure induced cancer death (REID) values for some common computed tomography angiography (CTA) scans. Materials and Methods: The scan parameters and paent gender and age were collected for a total of 251 paents undergoing CTA scans of the head (51), carod (50), abdomen (50), thoracic (50) and the lower extremies (50). The effecve diameter, scan length, effecve tube current and the dose-length product (DLP) values were obtained for each paent. The organ doses and the effecve dose were calculated by the ImpactDose program. The REID values were esmated for the different CTA scans by the calculated organ doses and corresponding age- and sex- specific risk factors. Results: The REID values for the CTA scans of head were 17±4 and 20±3 per million, carod were 35±9 and 67±14 per million, the lower extremies were 60±26 and 64±24 per million, thoracic were 97±28 and 204±72 per million, and for abdomen were 101±25 and 194±72 per million, for males and females, respecvely. Conclusion: The results of this invesgaon showed that CTA scans are associated with non-negligible risk of exposure induced cancer. A variaon in radiaon cancer risk as a funcon of age and gender of the paents was demonstrated and found that the younger female paents were at the highest risk.
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