A survey of local diagnostic reference levels for the head, thorax, abdomen and pelvis computed tomography in Norway and Canada.

IF 0.9 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Acta radiologica open Pub Date : 2022-10-07 eCollection Date: 2022-10-01 DOI:10.1177/20584601221131477
Elena Tonkopi, Eline Jahre Wikan, Tor Olav Hovland, Sivert Høgset, Thomas Alexander Kofod, Selasi K Sefenu, Emily Hughes-Ryan, Dakota D Entremont-O Connell, Catherine Gunn, Tanja Holter, Safora Johansen
{"title":"A survey of local diagnostic reference levels for the head, thorax, abdomen and pelvis computed tomography in Norway and Canada.","authors":"Elena Tonkopi,&nbsp;Eline Jahre Wikan,&nbsp;Tor Olav Hovland,&nbsp;Sivert Høgset,&nbsp;Thomas Alexander Kofod,&nbsp;Selasi K Sefenu,&nbsp;Emily Hughes-Ryan,&nbsp;Dakota D Entremont-O Connell,&nbsp;Catherine Gunn,&nbsp;Tanja Holter,&nbsp;Safora Johansen","doi":"10.1177/20584601221131477","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Computed tomography (CT) contributes to 60% of the collective dose in medical imaging. Literature has demonstrated that patient dose varies across regions and countries. Establishing diagnostic reference levels (DRLs) contributes to the optimization of clinical practices and radiation protection.</p><p><strong>Purpose: </strong>To survey the dose indices (CTDIvol and dose-length product) for frequently performed CT examinations from the chosen hospitals in Norway and Canada and to determine local DRLs (LDRLs) based on the collected data.</p><p><strong>Material and methods: </strong>The survey included eight scanners from two Norwegian hospitals and four scanners from four Canadian hospitals. Dosimetry data were collected for the following routine CT examinations: head, contrast-enhanced thorax, and abdomen and pelvis. Overall 480 adult average-sized patients from Norway and 360 from Canada were included in the survey. The LDRLs were determined as the 75th percentile of distributions of median values of dose indicators from different CT scanners. The differences in dose between scanners were determined using single-factor ANOVA.</p><p><strong>Results: </strong>The LDRLs determined in Norway were higher overall than in Canada. The obtained values were compared to the national DRLs. The dose from several scanners in Norway exceeded national Norwegian DRLs, while Canadian LDRLs were below the Canadian reference levels. The differences between the means of the dose distributions from each scanner were statistically significant (<i>p</i> < 0.05) for all examinations with exception of identical scanners located in the same hospital and using the same protocols.</p><p><strong>Conclusion: </strong>Observed dose variations even in the same hospital, or from the same scanner model confirmed the need for CT protocol optimization.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.9000,"publicationDate":"2022-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/c7/69/10.1177_20584601221131477.PMC9549116.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta radiologica open","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1177/20584601221131477","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2022/10/1 0:00:00","PubModel":"eCollection","JCR":"Q4","JCRName":"RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING","Score":null,"Total":0}
引用次数: 0

Abstract

Background: Computed tomography (CT) contributes to 60% of the collective dose in medical imaging. Literature has demonstrated that patient dose varies across regions and countries. Establishing diagnostic reference levels (DRLs) contributes to the optimization of clinical practices and radiation protection.

Purpose: To survey the dose indices (CTDIvol and dose-length product) for frequently performed CT examinations from the chosen hospitals in Norway and Canada and to determine local DRLs (LDRLs) based on the collected data.

Material and methods: The survey included eight scanners from two Norwegian hospitals and four scanners from four Canadian hospitals. Dosimetry data were collected for the following routine CT examinations: head, contrast-enhanced thorax, and abdomen and pelvis. Overall 480 adult average-sized patients from Norway and 360 from Canada were included in the survey. The LDRLs were determined as the 75th percentile of distributions of median values of dose indicators from different CT scanners. The differences in dose between scanners were determined using single-factor ANOVA.

Results: The LDRLs determined in Norway were higher overall than in Canada. The obtained values were compared to the national DRLs. The dose from several scanners in Norway exceeded national Norwegian DRLs, while Canadian LDRLs were below the Canadian reference levels. The differences between the means of the dose distributions from each scanner were statistically significant (p < 0.05) for all examinations with exception of identical scanners located in the same hospital and using the same protocols.

Conclusion: Observed dose variations even in the same hospital, or from the same scanner model confirmed the need for CT protocol optimization.

Abstract Image

Abstract Image

Abstract Image

挪威和加拿大的头部、胸部、腹部和骨盆计算机断层扫描诊断参考水平的调查。
背景:计算机断层扫描(CT)在医学成像中占总剂量的60%。文献表明,患者剂量因区域和国家而异。建立诊断参考水平(drl)有助于优化临床实践和辐射防护。目的:调查挪威和加拿大选定医院CT检查的剂量指数(CTDIvol和剂量长度乘积),并根据收集的数据确定当地的DRLs (LDRLs)。材料和方法:调查包括来自两家挪威医院的8台扫描仪和来自四家加拿大医院的4台扫描仪。收集剂量学数据用于以下常规CT检查:头部、胸部、腹部和骨盆。共有来自挪威的480名成人平均体型患者和来自加拿大的360名患者参与了调查。LDRLs由不同CT扫描仪剂量指标中位数分布的第75百分位数确定。使用单因素方差分析确定扫描仪之间的剂量差异。结果:挪威的LDRLs总体上高于加拿大。将所得值与国家drl进行比较。挪威几台扫描仪的剂量超过了挪威国家最低限度,而加拿大的最低限度则低于加拿大的参考水平。除了位于同一医院并使用相同方案的相同扫描仪外,所有检查中每个扫描仪剂量分布平均值之间的差异具有统计学意义(p < 0.05)。结论:即使在同一家医院,或来自同一台扫描仪型号,所观察到的剂量差异也证实了CT方案优化的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
审稿时长
12 weeks
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信