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CC BY-NC-ND 4.0 · Journal of Gastrointestinal and Abdominal Radiology 2022; 05(02): 076-084
DOI: 10.1055/s-0042-1742772
Review Article

Principles and Available Hardware in DECT

Ezhilmathi Alavandar
1   Department of Radiology, Kovai Medical Center and Hospital, Coimbatore, India
,
Venkatesh Kasi Arunachalam
1   Department of Radiology, Kovai Medical Center and Hospital, Coimbatore, India
,
Niyas Narappulan
1   Department of Radiology, Kovai Medical Center and Hospital, Coimbatore, India
,
Gowtham S. Mahadevan
1   Department of Radiology, Kovai Medical Center and Hospital, Coimbatore, India
,
Ravindar Kashyap
1   Department of Radiology, Kovai Medical Center and Hospital, Coimbatore, India
,
Pankaj Mehta
1   Department of Radiology, Kovai Medical Center and Hospital, Coimbatore, India
,
Mathew Cherian
1   Department of Radiology, Kovai Medical Center and Hospital, Coimbatore, India
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Abstract

Computed tomography (CT) has undergone a phenomenal evolution since its introduction in 1971 and has revolutionized diagnostic radiology. It is now the cornerstone of diagnostic imaging and has become an inevitable part of the management of patients. Among all the advancements and breakthroughs witnessed over the years, the most recent and most advanced is the dual-energy CT (DECT), also known as spectral CT, introduced in 2006. In DECT, two datasets are obtained by scanning with two different energy spectra (low and high energy). The difference in attenuation can differentiate materials with different elemental compositions but similar attenuation in single-energy CT. Therefore, it has widespread clinical applications based on its potential for material decomposition and virtual monoenergetic imaging. In this review, the principle and hardware of DECT will be presented with an overview of its clinical applications.

Keywords

CT - diagnostic imaging - DECT - attenuation - applications - principle


Publication History

Article published online:
18 February 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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