DSCT: advances of improved temporal resolution in coronary plaque imaging

Abstract

OBJECTIVES: The aim of this study was to quantify image quality gains of a moving coronary plaque phantom using dual-source computed tomography (DSCT) providing 83 milliseconds temporal resolution in direct comparison to 64 slice single-source multidetector CT (MDCT) with a temporal resolution of 165 milliseconds.

MATERIALS AND METHODS: Three cardiac vessel phantoms with fixed 50% stenosis and changing plaque configurations were mounted on a moving device simulating cardiac motion. Scans were performed at a simulated heart frequency of 60 to 120 bpm. Image quality assessment was performed in different anatomic orientations inside a thoracic phantom.

RESULTS: A significant improvement of image quality using the DSCT could be found (P=0.0002). Relevant factors influencing image quality aside from frequency (P=0.0002) are plaque composition (P<0.0001), as well as orientation (P<0.0001).

CONCLUSION: Scanning with 83 milliseconds temporal resolution improved image quality of coronary plaque at higher heart frequencies.

Authors: Reimann AJ, Rinck D, Birinci-Aydogan A, Scheuering M, Burgstahler C, Schroeder S, Brodoefel H, Tsiflikas I, Herberts T, Flohr T, Claussen CD, Kopp AF, Heuschmid M.

Invest Radiol. 2007 Mar;42(3):196-203.