Dual-source CT coronary imaging in heart transplant recipients: image quality and optimal reconstruction interval
Bastarrika G (1), De Cecco CN, Arraiza M, Ubilla M, Mastrobuoni S, Pueyo JC, Rábago G.
(1) Department of Radiology, Clínica Universitaria, Universidad de Navarra, Avenida Pio XII, 36, 31008, Pamplona, Spain
Magazine: European Radiology
Date: Sep 1, 2008Cardiac Surgery [SP] Radiology [SP]
The image quality and optimal reconstruction interval for coronary arteries in heart transplant recipients undergoing non-invasive dual-source computed tomography (DSCT) coronary angiography was evaluated.
Twenty consecutive heart transplant recipients who underwent DSCT coronary angiography were included (19 male, one female; mean age 63.1 +/- 10.7 years). Data sets were reconstructed in 5% steps from 30% to 80% of the R-R interval. Two blinded independent observers assessed the image quality of each coronary segments using a five-point scale (from 0 = not evaluative to 4 = excellent quality). A total of 289 coronary segments in 20 heart transplant recipients were evaluated. Mean heart rate during the scan was 89.1 +/- 10.4 bpm. At the best reconstruction interval, diagnostic image quality (score > or = 2) was obtained in 93.4% of the coronary segments (270/289) with a mean image quality score of 3.04 +/- 0.63.
Systolic reconstruction intervals provided better image quality scores than diastolic reconstruction intervals (overall mean quality scores obtained with the systolic and diastolic reconstructions 3.03 +/- 1.06 and 2.73 +/- 1.11, respectively; P < 0.001). Different systolic reconstruction intervals (35%, 40%, 45% of RR interval) did not yield to significant differences in image quality scores for the coronary segments (P = 0.74).
Reconstructions obtained at the systolic phase of the cardiac cycle allowed excellent diagnostic image quality coronary angiograms in heart transplant recipients undergoing DSCT coronary angiography.
CITATION Eur Radiol. 2008 Sep;18(9):1791-9. doi: 10.1007/s00330-008-0957-2. Epub 2008 Apr 17.
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