Update of national diagnostic reference levels for adult CT in Switzerland and assessment of radiation dose reduction since 2010.

Details

Serval ID
serval:BIB_39CBA0F2E6C2
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Update of national diagnostic reference levels for adult CT in Switzerland and assessment of radiation dose reduction since 2010.
Journal
European radiology
Author(s)
Aberle C., Ryckx N., Treier R., Schindera S.
ISSN
1432-1084 (Electronic)
ISSN-L
0938-7994
Publication state
Published
Issued date
03/2020
Peer-reviewed
Oui
Volume
30
Number
3
Pages
1690-1700
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
To update the national diagnostic reference levels (DRLs) for adult CT in Switzerland using dose management software and to compare them to the previous Swiss DRLs from 2010.
CT dose data from 14 radiological institutes with a total of 50 CT scanners were collected with locally installed dose management software between 2014 and 2017. Data were assigned to 15 defined master protocols. Data cleaning steps were developed and adjusted individually for each participating institute and protocol. The DRLs for each master protocol were calculated as the 75th percentile of the distribution of the median volume computed tomography dose index (CTDI <sub>vol</sub> ) and dose-length product (DLP) values per CT scanner.
In total, 220,269 CT exams were available after data cleaning. Updated DRLs showed a clear trend towards lower doses compared with previous DRLs. The average relative change in the DRLs for CTDI <sub>vol</sub> was - 30% (0 to - 47%) and - 22% for DLP (+ 20 to - 40%). The largest relative decrease in the DRL for DLP was observed for the cervical spine protocol (- 40%), the two chest protocols (chest, - 37%; and exclusion of pulmonary embolism, - 33%), and the two neck protocols (neck, - 32%; and carotid angiography, - 28%). The DRLs for other protocols, for example the head and the abdomen-pelvis protocol, showed smaller relative changes (- 11% and - 17%).
The updated national DRLs are substantially lower than the previous values from 2010, demonstrating technological progress and the efforts of the radiological community to lower CT radiation exposure.
• Dose management software allows the establishment of DRLs based on big data. • Updated Swiss DRLs for adult CT are substantially lower compared with those from 2010. • Swiss DRLs are low compared with other national DRLs.
Keywords
Radiation monitoring, Radiation protection, Switzerland, Tomography, X-ray computed, Tomography, X-ray computed
Pubmed
Web of science
Create date
30/11/2019 12:37
Last modification date
15/09/2020 5:26
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