COMPARISON OF SCAN LENGTH AND RADIATION DOSE PARAMETERS IN CONSECUTIVE THORACIC AND ABDOMINAL CT EXAMINATIONS
Journal Title: Kocatepe Medical Journal - Year 2021, Vol 4, Issue 22
Abstract
OBJECTIVE: The aim of this study is to evaluate the scan length variability and the effect of the scan length on radiation dose parameters in consecutive thoracic and abdominal CT examinations. MATERIAL AND METHODS: Patients who underwent consecutive thoracic (n = 85) and abdominal CT (n = 57) examinations between January 2018 and December 2018 were included in this study. Thirty-nine percent (n = 33) of the thoracic CT examinations and 51 % (n = 29) of the abdominal CT examinations were performed on women. CT radiation dose parameters were obtained retrospectively from picture archiving communications system. Volume CT dose index (CTDIvol) and dose length product (DLP) values were recorded from the patient protocols. Effective dose (ED) and scan length (SL) were calculated. Consecutive thoracic and abdominal CT examinations were divided into two groups (first examination and second examination), and CT radiation dose parameters and SL were evaluated. RESULTS: The mean age of patients in both thoracic and abdominal CT groups were 58±16 and 51±16 years old, respectively. There was no statistical difference between consecutive CT examinations in the relevant regions in terms of DLP and ED values (p> 0.05). CTDIvol were similar between consecutive examinations in the thoracic CT group (p=0.724), whereas there was significant difference between consecutive examinations in the abdominal CT group in terms of CTDIvol (p=0.042). The mean differences of SL in CT examinations were 3.3±2.6 cm for thoracic CT group and 3.1±2.5 cm for abdominal CT group. There was no significant difference in both consecutive thoracic and abdominal CT examinations in terms of SL (p> 0.05). CONCLUSIONS: In consecutive thoracic and abdominal CT examinations, there was no difference in terms of SL that can affect DLP and ED. Although there is no difference in terms of SL between consecutive thoracic and abdominal CT examinations, SL must be adjusted as short as possible since it will not cause any loss in the diagnostic information in the region of interest.
Authors and Affiliations
Eray ATLI, Abidin KILINÇER, Sadık Ahmet UYANIK, Umut ÖĞÜŞLÜ, Halime ÇEVİK CENKERİ
Keywords
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- EP ID EP697183
- DOI https://doi.org/10.18229/kocatepetip.741211
- Views 170
- Downloads 0
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