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Radiation dose and risk of exposure-induced death associated with common computed tomography procedures in Yazd Province.

Abstract：

PURPOSE:This survey was conducted to evaluate the radiation dose delivered to the patients through different CT procedures along with its corresponding risks in Yazd province. METHOD:Data for the five most common procedures were collected from six institutions from September 2017. The effective dose for each patient was estimated by ImpactDose software. The risk of exposure-induced death (REID) was calculated by coupling the BEIR VII model and ICRP 103 data for the Asian population. RESULTS:The median effective doses for the five most common procedures, in descending order, were as follows: 5.19 mSv for abdomen-pelvis, 3.30 mSv for routine chest, 3.00 mSv for chest HRCT, 0.76 mSv for Brain and 0.47 mSv for sinus. Averaged over all the procedures, the ratio of maximum to minimum of effective dose was 90-fold. The highest associated risk was tied to high-resolution CT scans for women which was estimated to be 1 exposure-induced death related to 2096 scans performed on a 20-year old patient. CONCLUSION:The estimated effective doses for all the procedures except sinus were comparably low, however, the variations among patient doses, even for a given procedure, were substantially high, indicating that further optimization processes need to be undertaken. Moreover, it was estimated that approximately 2000 scans of abdomen-pelvis performed on 20 year-old women could result in 1 radiation-induced cancer death, which in large scales may cause drastic health issues. In this regard, several approaches, one of which is the implementation of DRLs, can be suggested to reduce the collective dose from CT scans.

journal_name

Eur J Radiol

journal_title

European journal of radiology

authors

Masjedi H,Omidi R,Zamani H,Perota G,Zare MH

doi

10.1016/j.ejrad.2020.108932

subject

Has Abstract

pub_date

2020-05-01 00:00:00

pages

108932

eissn

0720-048X

issn

1872-7727

pii

S0720-048X(20)30121-2

journal_volume

126

pub_type

杂志文章

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