Universität zu Köln

Parakh, Anushri ORCID: 0000-0002-4778-2383, Lennartz, Simon, An, Chansik ORCID: 0000-0002-0484-6658, Rajiah, Prabhakar ORCID: 0000-0001-7538-385X, Yeh, Benjamin M., Simeone, Frank J., Sahani, Dushyant, V and Kambadakone, Avinash R. (2021). Dual-Energy CT Images: Pearls and Pitfalls. Radiographics, 41 (1). S. 98 - 120. OAK BROOK: RADIOLOGICAL SOC NORTH AMERICA. ISSN 0271-5333

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Abstract

Dual-energy CT (DECT) is a tremendous innovation in CT technology that allows creation of numerous imaging datasets by enabling discrete acquisitions at more than one energy level. The wide range of images generated from a single DECT acquisition provides several benefits such as improved lesion detection and characterization, superior determination of material composition, reduction in the dose of iodine, and more robust quantification. Technological advances and the proliferation of various processing methods have led to the availability of diverse vendor-based DECT approaches, each with a different acquisition and image reconstruction process. The images generated from various DECT scanners differ from those from conventional single-energy CT because of differences in their acquisition techniques, material decomposition methods, image reconstruction algorithms, and postprocessing methods. DECT images such as virtual monochromatic images, material density images, and virtual unenhanced images have different imaging appearances, texture features, and quantitative capabilities. This heterogeneity creates challenges in their routine interpretation and has certain associated pitfalls. Some artifacts such as residual iodine on virtual unenhanced images and an appearance of pseudopneumatosis in a gas-distended bowel loop on material-density iodine images are specific to DECT, while others such as pseudoenhancement seen on virtual monochromatic images are also observed at single-energy CT. Recognizing the potential pitfalls associated with DECT is necessary for appropriate and accurate interpretation of the results of this increasingly important imaging tool. (C) RSNA, 2021

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Parakh, Anushri UNSPECIFIED orcid.org/0000-0002-4778-2383 UNSPECIFIED Lennartz, Simon UNSPECIFIED UNSPECIFIED UNSPECIFIED An, Chansik UNSPECIFIED orcid.org/0000-0002-0484-6658 UNSPECIFIED Rajiah, Prabhakar UNSPECIFIED orcid.org/0000-0001-7538-385X UNSPECIFIED Yeh, Benjamin M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Simeone, Frank J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sahani, Dushyant, V UNSPECIFIED UNSPECIFIED UNSPECIFIED Kambadakone, Avinash R. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-594544
DOI:	10.1148/rg.2021200102
Journal or Publication Title:	Radiographics
Volume:	41
Number:	1
Page Range:	S. 98 - 120
Date:	2021
Publisher:	RADIOLOGICAL SOC NORTH AMERICA
Place of Publication:	OAK BROOK
ISSN:	0271-5333
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BONE-MARROW EDEMA; VIRTUAL MONOCHROMATIC IMAGES; BEAM-HARDENING ARTIFACTS; TRUE UNENHANCED IMAGES; MULTIDETECTOR ROW CT; ATTENUATION VALUES; IODINE QUANTIFICATION; DIAGNOSTIC-ACCURACY; COMPUTED-TOMOGRAPHY; MONOENERGETIC IMAGES Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/59454