Appearance and Frequency of Gas Interface Artifacts Involving Small Bowel on Rapid-Voltage-Switching Dual-Energy CT Iodine-Density Images

AJR. American Journal of Roentgenology
En-Haw WuBenjamin M Yeh

Abstract

The purpose of this study is to describe the appearance and frequency of gas interface artifacts in the jejunum that may mimic severe bowel disease on iodine-density images generated from rapid-voltage-switching dual-energy CT (DECT) scans. Two readers retrospectively reviewed 108 consecutive abdominal rapid-voltage-switching DECT scans to record the presence of image artifacts in jejunal segments with different degrees of gaseous luminal filling, classified as full, partial, or absent. Readers viewed iodine-density images and corresponding 140-kVp and 65-keV virtual monochromatic images and classified the jejunal artifacts on iodine-density images as pseudostratified appearance of the bowel wall, pseudopneumatosis, pseudohyperenhancement, or pseudohypoenhancement. We correlated the presence of the artifacts with clinical features suggesting bowel disease. Image artifacts were found in 91 of 108 scans (84.3%), appeared in 148 of 265 jejunal segments (55.8%), and included each type except for pseudohypoenhancement. Artifacts occurred exclusively when gas was present in the bowel lumen and were seen in 59 of 59 (100%) fully gas-distended segments, 89 of 98 (90.8%) partially gas-distended segments, and none of 108 gas-absent segme...Continue Reading

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Citations

Mar 1, 2018·Journal of Computer Assisted Tomography·Andrea AgostiniLorenzo Mannelli
Aug 11, 2020·Abdominal Radiology·Khaled Y ElbannaLuís S Guimarães
Jan 8, 2021·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Anushri ParakhAvinash R Kambadakone
Jul 1, 2021·Abdominal Radiology·Markus M ObmannBenjamin M Yeh
Sep 19, 2021·Journal of Medical Ultrasonics·Akira Yamada, Eriko Yoshizawa

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