Dual-source computed tomography: advances of improved temporal resolution in coronary plaque imaging

Invest Radiol. 2007 Mar;42(3):196-203. doi: 10.1097/01.rli.0000254409.79193.96.


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.

Publication types

  • Evaluation Study

MeSH terms

  • Algorithms
  • Coronary Angiography / instrumentation*
  • Coronary Angiography / methods
  • Coronary Artery Disease / diagnostic imaging*
  • Coronary Artery Disease / pathology
  • Humans
  • Image Processing, Computer-Assisted
  • Phantoms, Imaging
  • Radiographic Image Enhancement
  • Time Factors
  • Tomography, X-Ray Computed / instrumentation*
  • Tomography, X-Ray Computed / methods