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 language | English (US) |
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Pages (from-to) | 64-69 |
Number of pages | 6 |
Journal | Journal of computer assisted tomography |
Volume | 34 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2010 |
Keywords
- CT
- Coronary
- DSCT
- Quality
- Temporal resolution
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging