Filip M Kozłowski, Christoffel J van Reenen, Christoph J Trauernicht
{"title":"在一家三级医院建立当地 CT 结肠造影诊断参考水平。","authors":"Filip M Kozłowski, Christoffel J van Reenen, Christoph J Trauernicht","doi":"10.4102/sajr.v28i1.2809","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Diagnostic reference levels (DRLs) are an important metric in identifying abnormally high radiation doses in diagnostic examinations. National DRLs for CT colonography do not currently exist in South Africa, but there are efforts to collect data for a national DRL project.</p><p><strong>Objectives: </strong>This study investigated radiation doses for CT colonography in adult patients at a large tertiary hospital in South Africa with the aim of setting local DRLs.</p><p><strong>Method: </strong>Patient data from two CT scanners (Philips Ingenuity and Siemens Somatom go.Top) in the period March 2020 - March 2023 were obtained from the hospital's picture archiving and communication system (PACS) (<i>n</i> = 115). Analysis involved determining the median computed tomography dose index-volume (CTDI<sub>vol</sub>) and dose-length product (DLP) values. The findings were compared with DRLs established internationally.</p><p><strong>Results: </strong>Ingenuity median CTDI<sub>vol</sub> was 20 mGy and DLP was 2169 mGy*cm; Somatom median CTDI<sub>vol</sub> was 6 mGy and DLP was 557 mGy*cm. Ingenuity exceeded the United Kingdom's (UK) recommended DRLs by 82% and 214%, respectively. Somatom median CTDI<sub>vol</sub> and DLP were 45% and 19% lower than UK NDRLs.</p><p><strong>Conclusion: </strong>Somatom's tin filter and other dose reduction features provided significant dose reduction. These data were used to set DRLs for CT colonography at the hospital; CTDI<sub>vol</sub>: 6 mGy and DLP: 557 mGy*cm.</p><p><strong>Contribution: </strong>In addition to informing radiation protection practices at the level of the institution, the established local DRLs contribute towards implementing regional and national DRLs.</p>","PeriodicalId":43442,"journal":{"name":"SA Journal of Radiology","volume":"28 1","pages":"2809"},"PeriodicalIF":0.7000,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10839235/pdf/","citationCount":"0","resultStr":"{\"title\":\"Establishment of local diagnostic reference levels for CT colonography at a tertiary hospital.\",\"authors\":\"Filip M Kozłowski, Christoffel J van Reenen, Christoph J Trauernicht\",\"doi\":\"10.4102/sajr.v28i1.2809\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>Diagnostic reference levels (DRLs) are an important metric in identifying abnormally high radiation doses in diagnostic examinations. National DRLs for CT colonography do not currently exist in South Africa, but there are efforts to collect data for a national DRL project.</p><p><strong>Objectives: </strong>This study investigated radiation doses for CT colonography in adult patients at a large tertiary hospital in South Africa with the aim of setting local DRLs.</p><p><strong>Method: </strong>Patient data from two CT scanners (Philips Ingenuity and Siemens Somatom go.Top) in the period March 2020 - March 2023 were obtained from the hospital's picture archiving and communication system (PACS) (<i>n</i> = 115). Analysis involved determining the median computed tomography dose index-volume (CTDI<sub>vol</sub>) and dose-length product (DLP) values. The findings were compared with DRLs established internationally.</p><p><strong>Results: </strong>Ingenuity median CTDI<sub>vol</sub> was 20 mGy and DLP was 2169 mGy*cm; Somatom median CTDI<sub>vol</sub> was 6 mGy and DLP was 557 mGy*cm. Ingenuity exceeded the United Kingdom's (UK) recommended DRLs by 82% and 214%, respectively. Somatom median CTDI<sub>vol</sub> and DLP were 45% and 19% lower than UK NDRLs.</p><p><strong>Conclusion: </strong>Somatom's tin filter and other dose reduction features provided significant dose reduction. These data were used to set DRLs for CT colonography at the hospital; CTDI<sub>vol</sub>: 6 mGy and DLP: 557 mGy*cm.</p><p><strong>Contribution: </strong>In addition to informing radiation protection practices at the level of the institution, the established local DRLs contribute towards implementing regional and national DRLs.</p>\",\"PeriodicalId\":43442,\"journal\":{\"name\":\"SA Journal of Radiology\",\"volume\":\"28 1\",\"pages\":\"2809\"},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2024-01-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10839235/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"SA Journal of Radiology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4102/sajr.v28i1.2809\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/1/1 0:00:00\",\"PubModel\":\"eCollection\",\"JCR\":\"Q4\",\"JCRName\":\"RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"SA Journal of Radiology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4102/sajr.v28i1.2809","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/1/1 0:00:00","PubModel":"eCollection","JCR":"Q4","JCRName":"RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING","Score":null,"Total":0}
Establishment of local diagnostic reference levels for CT colonography at a tertiary hospital.
Background: Diagnostic reference levels (DRLs) are an important metric in identifying abnormally high radiation doses in diagnostic examinations. National DRLs for CT colonography do not currently exist in South Africa, but there are efforts to collect data for a national DRL project.
Objectives: This study investigated radiation doses for CT colonography in adult patients at a large tertiary hospital in South Africa with the aim of setting local DRLs.
Method: Patient data from two CT scanners (Philips Ingenuity and Siemens Somatom go.Top) in the period March 2020 - March 2023 were obtained from the hospital's picture archiving and communication system (PACS) (n = 115). Analysis involved determining the median computed tomography dose index-volume (CTDIvol) and dose-length product (DLP) values. The findings were compared with DRLs established internationally.
Results: Ingenuity median CTDIvol was 20 mGy and DLP was 2169 mGy*cm; Somatom median CTDIvol was 6 mGy and DLP was 557 mGy*cm. Ingenuity exceeded the United Kingdom's (UK) recommended DRLs by 82% and 214%, respectively. Somatom median CTDIvol and DLP were 45% and 19% lower than UK NDRLs.
Conclusion: Somatom's tin filter and other dose reduction features provided significant dose reduction. These data were used to set DRLs for CT colonography at the hospital; CTDIvol: 6 mGy and DLP: 557 mGy*cm.
Contribution: In addition to informing radiation protection practices at the level of the institution, the established local DRLs contribute towards implementing regional and national DRLs.
期刊介绍：
The SA Journal of Radiology is the official journal of the Radiological Society of South Africa and the Professional Association of Radiologists in South Africa and Namibia. The SA Journal of Radiology is a general diagnostic radiological journal which carries original research and review articles, pictorial essays, case reports, letters, editorials, radiological practice and other radiological articles.
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