Using body mass index to estimate individualised patient radiation dose in abdominal computed tomography

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dc.contributor.authorO'Neill, Siobhán B.
dc.contributor.authorKavanagh, Richard G.
dc.contributor.authorCarey, Brian W.
dc.contributor.authorMoore, Niamh
dc.contributor.authorMaher, Michael M.
dc.contributor.authorO'Connor, Owen J.
dc.contributor.funderUniversity College Corken
dc.date.accessioned2018-12-04T15:23:35Z
dc.date.available2018-12-04T15:23:35Z
dc.date.issued2018-11-28
dc.date.updated2018-11-30T16:15:14Z
dc.description.abstractBackground: The size-specific dose estimate (SSDE) is a dose-related metrics that incorporates patient size into its calculation. It is usually derived from the volume computed tomography dose index (CTDIvol) by applying a conversion factor determined from manually measured anteroposterior and lateral skin-to-skin patient diameters at the midslice level on computed tomography (CT) localiser images, an awkward, time-consuming, and not highly reproducible technique. The objective of this study was to evaluate the potential for the use of body mass index (BMI) as a size-related metrics alternative to the midslice effective diameter (DE) to obtain a size-specific dose (SSDE) in abdominal CT. Methods: In this retrospective study of patients who underwent abdominal CT for the investigation of inflammatory bowel disease, the DE was measured on the midslice level on CT-localiser images of each patient. This was correlated with patient BMI and the linear regression equation relating the quantities was calculated. The ratio between the internal and the external abdominal diameters (DRATIO) was also measured to assess correlation with radiation dose. Pearson correlation analysis and linear regression models were used. Results: There was good correlation between DE and patient BMI (r = 0.88). An equation allowing calculation of DE from BMI was calculated by linear regression analysis as follows: DE = 0.76 (BMI) + 9.4. A weak correlation between radiation dose and DRATIO was demonstrated (r = 0.45). Conclusions: Patient BMI can be used to accurately estimate DE, obviating the need to measure anteroposterior and lateral diameters in order to calculate a SSDE for abdominal CT.en
dc.description.sponsorshipUniversity College Cork (Professor Denis O’Sullivan Research Fellowship)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationO’Neill, S., Kavanagh, R. G., Carey, B. W., Moore, N., Maher, M. and O’Connor, O. J. (2018) 'Using body mass index to estimate individualised patient radiation dose in abdominal computed tomography', European Radiology Experimental, 2(1), 38 (8 pp). doi: 10.1186/s41747-018-0070-5en
dc.identifier.doi10.1186/s41747-018-0070-5
dc.identifier.endpage38-8en
dc.identifier.issn2509-9280
dc.identifier.journaltitleEuropean Radiologyen
dc.identifier.startpage38-1en
dc.identifier.urihttps://hdl.handle.net/10468/7169
dc.identifier.volume2en
dc.language.isoenen
dc.publisherSpringeren
dc.relation.urihttps://eurradiolexp.springeropen.com/articles/10.1186/s41747-018-0070-5
dc.rights© The Author(s). 2018 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectBMI and SSDEen
dc.subjectEffective diameteren
dc.subjectCTen
dc.subjectAbdomenen
dc.subjectBody mass indexen
dc.subjectTomography (x-ray, computed)en
dc.subjectRadiation dosageen
dc.subjectRadiation doseen
dc.titleUsing body mass index to estimate individualised patient radiation dose in abdominal computed tomographyen
dc.typeArticle (peer-reviewed)en
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