Dual-energy CT and its potential use for quantitative myocardial CT perfusion Review uri icon

Overview

MeSH Major

  • Coronary Angiography
  • Coronary Artery Disease
  • Myocardial Perfusion Imaging
  • Tomography, X-Ray Computed

abstract

  • Application of quantitative myocardial CT perfusion (CTP) for the assessment of coronary artery disease may have a significant effect on patient care as the functional significance of a coronary stenosis can be evaluated through absolute measurement of the downstream myocardial perfusion (MP) both at rest and under exercise or pharmacologic stress. A main challenge of myocardial CTP is beam hardening (BH), arising from the polychromatic nature of x-rays used in CT scanning and the presence of highly attenuating contrast agent in the heart chambers during the CT acquisition. The BH effect induces significant nonuniform shifts in CT numbers which, if uncorrected, can lead to inaccurate assessment of MP. With the recent developments of dual-energy CT (DECT) scanning on clinical scanners, the BH effect on MP measurement could be reduced with the generation of monochromatic images relatively free of BH artifacts from the acquired dual-energy data. Here, we review the different techniques of acquiring dual-energy scans and generating monochromatic images, followed by discussion on the progress of developing a DECT technique with reduced radiation dose for quantitative myocardial CTP.

publication date

  • September 2012

Research

keywords

  • Review

Identity

Language

  • eng

Digital Object Identifier (DOI)

  • 10.1016/j.jcct.2012.07.002

PubMed ID

  • 23040537

Additional Document Info

start page

  • 308

end page

  • 17

volume

  • 6

number

  • 5