#Ct scan have radiation series

7ĭespite the introduction of lower dose CT scans, large radiologic series have shown considerable variability in the amount of ionizing radiation utilized per scan across multiple institutions. 2 Consistent with the ALARA (as low as reasonably achievable) principle, some centers have introduced low-dose and ultra-low-dose CT protocols to help reduce patient radiation exposure.

6 Although 50 mSv is the annual occupational exposure threshold, no such threshold has been established for medical imaging, with 20 and 50 mSv commonly cited as medical imaging exposure limits in previous studies.

The recommended EDose limit for occupational exposure by the International Commission on Radiological Protection (ICRP) is 50 mSv. 2–4 Previous studies have shown that effective dose (EDose) is proportional to total imparted radiation from an imaging study and represents an estimate that accounts for future cancer risk based on irradiated organ type. Enacting new approaches to CT protocols may spare stone patients from exceeding recommended dose limits.Īlthough noncontrast CT is the gold-standard imaging modality for detecting urinary calculi, 1 its amplified usage in the 21st century has prompted concern for a higher risk of developing secondary malignancies. Unnecessary phases and underutilization of low-dose CT protocols continue to take place. Increased body mass index, number of scans, and multiphase scans were associated with exceeding exposure thresholds ( p 50%.Ĭonclusions: Stone patients referred to a tertiary stone center may receive excessive radiation from CT scans alone. Results: Of 343 noncontrast CTs performed, only 29 (8%) were low-dose CTs (calculated EDose 20 mSv and >50 mSv/year, respectively. Models were created to test radiation reducing effects of low-dose and phase-reduction CT protocols. Multivariate logistic regression analysis identified factors associated with exceeding recommended dose limits. Methods: From November 2015 to March 2017, consecutive new patients enrolled into the Registry for Stones of the Kidney and Ureter (ReSKU™) had the dose-length product of every available CT abdomen/pelvis within 5 years of their initial visit recorded, allowing for an effective dose (EDose) calculation. This study aimed to quantify radiation doses from CTs received by stone patients before their evaluation at a tertiary care stone clinic. How often these patients exceed the recommended dose limits for occupational radiation exposure of >100 mSv for 5 years and >50 mSv in a single year from CT alone remains unknown. Purpose: Kidney stone patients routinely have CT scans during diagnostic work-up before being referred to a tertiary center.

Ct scan have radiation