Dual-source computed tomographic temporal resolution provides higher image quality than 64-detector temporal resolution at low heart rates.

Journal of Computer Assisted Tomography
Philip A AraozCynthia H McCollough

Abstract

To compare coronary image quality at temporal resolutions associated with dual-source computed tomography (DSCT; 83 milliseconds) and 64-detector row scanning (165 milliseconds). In 30 patients with a heart rate of less than 70 beats per minute, DSCT coronary angiograms were reconstructed at 83- and 165-millisecond temporal resolutions over different cardiac phases. A blinded observer graded coronary quality. The typical DSCT temporal resolution (83 milliseconds) showed a significantly greater quality at end-systole for all coronary vessels and at end-diastole for the right coronary and left anterior descending coronary arteries. For all vessels, the end-diastole produced the highest quality for both temporal resolutions. Imaging at 83 milliseconds creates superior quality at end-systole for all coronary vessels and at end-diastole for the right coronary and left anterior descending coronary arteries. At low heart rates, end-diastole produces the highest quality at both temporal resolutions.

References

Dec 13, 2005·European Radiology·Thomas G FlohrBernd M Ohnesorge
May 16, 2006·European Radiology·Sebastian LeschkaHatem Alkadhi
Aug 21, 2007·Journal of the American College of Cardiology·Annick C WeustinkPim J de Feyter
Nov 22, 2007·AJR. American Journal of Roentgenology·Harald SeifarthRoman Fischbach
Dec 25, 2007·Journal of the American College of Cardiology·Ulrike RopersStephan Achenbach

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