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Influence of tube potential on CT body composition analysis


Morsbach, Fabian; Zhang, Yi-Hua; Nowik, Patrik; Martin, Lena; Lindqvist, Catarina; Svensson, Anders; Brismar, Torkel B (2018). Influence of tube potential on CT body composition analysis. Nutrition, 53:9-13.

Abstract

OBJECTIVES Our purpose was to investigate whether tube potential in contrast-enhanced computed tomography (CT) affects body composition analysis. METHODS Images from dual-source, dual-energy CT from the abdomen with intravenous contrast media administration were used. A total of 17 patients (11 women, mean age 52) with a mean body mass index of 20.8 kg/cm were included. Simultaneously acquired images with a tube voltage of 80 kV and 140 kV were compared. Body composition was analyzed on a single slice at the L3 level. Parameters evaluated included muscle and fat attenuation (Hounsfield units [HU]), skeletal muscle index (cm/m), muscle area (cm), and steatotic muscle area (cm). Significant differences between 80 kV and 140 kV series were compared using the paired Student's t test. RESULTS Tube potential affected muscle attenuation with an average difference of 17% between 80 kV and 140 kV series (48 HU versus 41 HU, P < 0.01), fat attenuation (-84 HU versus -69 HU, P < 0.01), skeletal muscle index of 5.2% (40.1 cm/m versus 42.2 cm/m, P < 0.01), muscle area of 5.1% (117 cm versus 123 cm, P < 0.01), and steatotic muscle area of 12.9% (31 cm versus 35 cm, P < 0.01). CONCLUSION Tube potential significantly affects body segmentation in contrast-enhanced CT.

Abstract

OBJECTIVES Our purpose was to investigate whether tube potential in contrast-enhanced computed tomography (CT) affects body composition analysis. METHODS Images from dual-source, dual-energy CT from the abdomen with intravenous contrast media administration were used. A total of 17 patients (11 women, mean age 52) with a mean body mass index of 20.8 kg/cm were included. Simultaneously acquired images with a tube voltage of 80 kV and 140 kV were compared. Body composition was analyzed on a single slice at the L3 level. Parameters evaluated included muscle and fat attenuation (Hounsfield units [HU]), skeletal muscle index (cm/m), muscle area (cm), and steatotic muscle area (cm). Significant differences between 80 kV and 140 kV series were compared using the paired Student's t test. RESULTS Tube potential affected muscle attenuation with an average difference of 17% between 80 kV and 140 kV series (48 HU versus 41 HU, P < 0.01), fat attenuation (-84 HU versus -69 HU, P < 0.01), skeletal muscle index of 5.2% (40.1 cm/m versus 42.2 cm/m, P < 0.01), muscle area of 5.1% (117 cm versus 123 cm, P < 0.01), and steatotic muscle area of 12.9% (31 cm versus 35 cm, P < 0.01). CONCLUSION Tube potential significantly affects body segmentation in contrast-enhanced CT.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Diagnostic and Interventional Radiology
Dewey Decimal Classification:610 Medicine & health
Scopus Subject Areas:Health Sciences > Endocrinology, Diabetes and Metabolism
Health Sciences > Nutrition and Dietetics
Language:English
Date:September 2018
Deposited On:13 Dec 2018 08:15
Last Modified:29 Jul 2020 08:23
Publisher:Elsevier
ISSN:0899-9007
OA Status:Closed
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1016/j.nut.2017.12.016
PubMed ID:29625351

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