| Diagnostic Reference Levels From the ACR CT Accreditation Program. | |
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MedLine Citation:
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PMID: 22051465 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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PURPOSE: The aim of this study was to assess the distribution of CT dose index (CTDI) values reported by sites undergoing ACR CT accreditation between 2002 and 2004. METHODS: Weighted CTDI (CTDI(w)) values were measured and reported by sites applying for ACR CT accreditation, and the percentage of scanners with values above the 2002 ACR diagnostic reference levels (DRLs) was determined. Acquisition parameters for a site's adult head, adult abdominal, and pediatric abdominal examinations were used to calculate volume CTDI (CTDI(vol)), and the average and standard deviation were calculated by year. Histogram analysis was performed to determine 75th and 90th percentiles of CTDI(vol). RESULTS: Between September 2002 and December 2004, 829 scanners underwent the accreditation process. Volume CTDI values (average ± SD) for 2002, 2003, 2004, and 2002 to 2004, respectively, were 66.7 ± 23.5, 58.5 ± 17.5, 55.8 ± 15.7, and 59.1 ± 18.6 mGy for adult head examinations; 18.7 ± 8.0, 19.2 ± 8.6, 17.0 ± 7.6, and 18.4 ± 8.3 for adult abdominal examinations; and 17.2 ± 9.7, 15.9 ± 8.6, 14.0 ± 7.0, and 15.5 ± 8.4 for pediatric abdominal examinations. For 2004 data, 23.8%, 2.3%, and 6.9% of sites reported doses above the 2002 CTDI(w) reference levels, compared with 49.6%, 4.7%, and 15% for 2002 data for adult head, adult abdominal, and pediatric abdominal examinations, respectively. Seventy-fifth percentiles of CTDI(vol) were 76.8 mGy (adult head, 2002 only), 22.2 mGy (adult abdominal), and 20.0 mGy (pediatric abdominal). CONCLUSIONS: From 2002 to 2004, average CTDI(vol) values decreased by 10.9, 1.7, and 3.2 mGy for adult head, adult abdominal, and pediatric abdominal examinations. Effective January 1, 2008, the ACR program implemented United States-specific diagnostic reference levels of 75, 25, and 20 mGy, respectively, for the CTDI(vol) of routine adult head, adult abdominal, and pediatric abdominal CT scans. |
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Authors:
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Cynthia McCollough; Theresa Branham; Vince Herlihy; Mythreyi Bhargavan; Lavonne Robbins; Krista Bush; Michael McNitt-Gray; J Thomas Payne; Tom Ruckdeschel; Doug Pfeiffer; Dianna Cody; Robert Zeman |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of the American College of Radiology : JACR Volume: 8 ISSN: 1558-349X ISO Abbreviation: J Am Coll Radiol Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-04 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101190326 Medline TA: J Am Coll Radiol Country: United States |
Other Details:
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Languages: eng Pagination: 795-803 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 American College of Radiology. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Mayo Clinic, Rochester, Minnesota. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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