CC BY-NC-ND 4.0 · Journal of Gastrointestinal and Abdominal Radiology
DOI: 10.1055/s-0041-1740475
Review Article

Utility of Dual-Energy CT in Abdominal Interventions

Tara Prasad Tripathy
1   Department of Interventional Radiology, Institute of Liver & Biliary Sciences, New Delhi, India
,
1   Department of Interventional Radiology, Institute of Liver & Biliary Sciences, New Delhi, India
,
Karamvir Chandel
1   Department of Interventional Radiology, Institute of Liver & Biliary Sciences, New Delhi, India
,
Amar Mukund
1   Department of Interventional Radiology, Institute of Liver & Biliary Sciences, New Delhi, India
› Author Affiliations
Funding None.

Abstract

Dual-energy computed tomography (DECT) is an emerging CT technique based on data acquisition at two different settings. Various postprocessing techniques generate different sets of images, each with unique advantages. With DECT, it is possible to obtain virtual unenhanced images from monochromatic reconstructions and attenuation maps of different elements, thereby improving the detection and characterization of a variety of lesions. Presently, DECT is widely used to evaluate pulmonary embolism, characterize abdominal masses, determine the composition of urinary calculi, and detect tophi in gout. CT angiography is an essential prerequisite for endovascular intervention. DECT allows a better quality of angiographic images with a lesser dose of contrast. Various postprocessing techniques in DECT also help in a better evaluation of response to locoregional therapy. Virtual noncontrast images and iodine map differentiate residual or recurrent tumors from intrinsically hyperdense materials. Superior metallic artifact reduction allows better evaluation of vascular injuries adjacent to bony fractured fragments or previously deployed embolization coils. In addition to metal artifacts reduction, virtual monochromatic spectral imaging could further mitigate metal artifacts during CT-guided biopsy, providing an improved depiction of lesions and safe and versatile access for long puncture pathways. This article reviews and illustrates the different applications of DECT in various abdominal interventions. Familiarity with the capabilities of DECT may help interventional radiologists to improve their practice and ameliorate patient care.

Note

The data sets used and/or analyzed during the current study are available from the corresponding author on reasonable request.


Authors' Contributions

T.P.T. and K.C. assisted in conceptualizing manuscript; R.P. in images and design of the work; A.M. supported in conceptualizing of the manuscript, manuscript editing, and drafting. All authors read and approved the final manuscript.




Publication History

Article published online:
24 January 2022

© 2022. Indian Society of Gastrointestinal and Abdominal Radiology. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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