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Dual-energy CT enterography in evaluation of Crohn’s disease: the role of virtual monochromatic images

Authors
  • Guler, Ezgi1
  • Unal, Nalan Gulsen2
  • Hekimsoy, Ilhan1
  • Kose, Timur2
  • Harman, Mustafa1
  • Ozutemiz, Ahmet Omer2
  • Elmas, Nevra Zehra1
  • 1 Ege University Faculty of Medicine, Bornova, Izmir, 35100, Turkey , Izmir (Turkey)
  • 2 Ege University Faculty of Medicine, Izmir, Turkey , Izmir (Turkey)
Type
Published Article
Journal
Japanese Journal of Radiology
Publisher
Springer Singapore
Publication Date
Nov 07, 2020
Volume
39
Issue
4
Pages
341–348
Identifiers
DOI: 10.1007/s11604-020-01065-6
Source
Springer Nature
Keywords
License
Yellow

Abstract

PurposeTo assess the use of virtual monochromatic images (VMI) for discrimination of affected and non-affected bowel walls in patients with Crohn’s disease (CD) as well as to compare mural enhancement between patients with and without CD.Materials and methodsThis retrospective study included 61 patients (47 with CD, 14 without CD). Attenuation value (AV), signal-to noise ratio (SNR), and contrast-to-noise ratio (CNR) were obtained at VMI energy levels from 40 to 110 keV in 10 keV increment. Analyses were performed among affected and non-affected bowel walls in CD patients, as well as from bowel walls in patients without CD. Image quality and mural enhancement were evaluated at VMI energy levels at 40, 70, and 110 keV.ResultsAt all energy levels of VMI, each quantitative data for AV, SNR, and CNR showed statistically significant difference between diseased and non-diseased bowel walls in CD patients. In the quantitative assessment of patients with and without CD, the optimal AV and SNR were obtained at 40 keV, and the optimal CNR was obtained at 70 keV. For the qualitative assessment, the best image quality and mural enhancement were obtained at 70 keV and 40 keV, respectively.ConclusionVMI are helpful for the differentiation of affected bowel walls in CD patients, providing high diagnostic accuracy.

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