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

Philip A. Araoz, Jacobo Kirsch, Andrew N. Primak, Natalie N. Braun, Osama Saba, Eric E. Williamson, W. Scott Harmsen, Jayawant N. Mandrekar, Cynthia H. McCollough

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Objective: To compare coronary image quality at temporal resolutions associated with dual-source computed tomography (DSCT; 83 milliseconds) and 64-detector row scanning (165 milliseconds). Methods: 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. Results: 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. Conclusions: 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.

Original languageEnglish (US)
Pages (from-to)64-69
Number of pages6
JournalJournal of computer assisted tomography
Volume34
Issue number1
DOIs
StatePublished - Jan 2010

Keywords

  • CT
  • Coronary
  • DSCT
  • Quality
  • Temporal resolution

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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