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2017 ; 18
(4
): 555-569
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Dual-Energy CT: New Horizon in Medical Imaging
#MMPMID28670151
Goo HW
; Goo JM
Korean J Radiol
2017[Jul]; 18
(4
): 555-569
PMID28670151
show ga
Dual-energy CT has remained underutilized over the past decade probably due to a
cumbersome workflow issue and current technical limitations. Clinical
radiologists should be made aware of the potential clinical benefits of
dual-energy CT over single-energy CT. To accomplish this aim, the basic
principle, current acquisition methods with advantages and disadvantages, and
various material-specific imaging methods as clinical applications of dual-energy
CT should be addressed in detail. Current dual-energy CT acquisition methods
include dual tubes with or without beam filtration, rapid voltage switching,
dual-layer detector, split filter technique, and sequential scanning. Dual-energy
material-specific imaging methods include virtual monoenergetic or monochromatic
imaging, effective atomic number map, virtual non-contrast or unenhanced imaging,
virtual non-calcium imaging, iodine map, inhaled xenon map, uric acid imaging,
automatic bone removal, and lung vessels analysis. In this review, we focus on
dual-energy CT imaging including related issues of radiation exposure to
patients, scanning and post-processing options, and potential clinical benefits
mainly to improve the understanding of clinical radiologists and thus, expand the
clinical use of dual-energy CT; in addition, we briefly describe the current
technical limitations of dual-energy CT and the current developments of
photon-counting detector.
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