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Age and size dependent diagnostic reference levels and achievable doses for 48 types of CT examinations: a multicenter cross-sectional study of one million CT examinations in China
Objective To establish diagnostic reference levels (DRLs) and achievable doses (ADs) of 48 commonly used CT examinations including advanced CT techniques such as dual energy CT (DECT) based on patient age and size in Chinese multicenter cohort with one million CT examinations. Methods Radiation dose...
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Published in: | Chinese journal of academic radiology 2024-12, Vol.7 (4), p.367-389 |
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Main Authors: | , , , , , , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites |
Online Access: | Get full text |
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Summary: | Objective
To establish diagnostic reference levels (DRLs) and achievable doses (ADs) of 48 commonly used CT examinations including advanced CT techniques such as dual energy CT (DECT) based on patient age and size in Chinese multicenter cohort with one million CT examinations.
Methods
Radiation dose data on 48 commonly used CT examinations including conventional CT examinations, CT angiography (CTA), and DECT examinations at four Chinese university hospitals between January 2016 and December 2018 were retrospectively collected. For all CT examinations, dose indexes were analyzed based on patient age and size. ADs and DRLs for volume CT dose index (CTDI
vol
), dose-length product (DLP), size-specific dose estimate (SSDE) and effective dose (ED) were analyzed.
Results
1,001,190 CT examinations were available for dose analysis. The most common examination was non-enhanced chest CT (26.25%) with the age-based CTDI
vol
AD ranging from 2.50 to 7.66 mGy and DRL from 3.67 to 10.29 mGy. Coronary CTA was the most used CTA (42.19%), with CTDI
vol
AD ranging from 8.08 to 13.65 mGy and DRL from 11.73 to 22.21 mGy. DECT of extremity was the most used DECT examination (48.24%), with CTDI
vol
AD ranging from 2.23 to 2.55 mGy and DRL ranged from 2.66 to 4.61 mGy. DRLs and ADs for size-based CTDI
vol
, DLP, SSDE and ED increased consistently with patient size.
Conclusion
This multicenter study provided DRLs of 48 commonly used CT examinations including conventional CT examinations, CTA, and DECT examinations based on patient age and size. Further research is required to develop national DRLs to guide CT radiation optimization. |
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ISSN: | 2520-8985 2520-8993 |
DOI: | 10.1007/s42058-024-00172-x |