Dual-source CT coronary imaging in heart transplant recipients: image quality and optimal reconstruction interval
Gorka Bastarrika (1), Carlo N. De Cecco (2), Maria Arraiza (1), Matias Ubilla (3), Stefano Mastrobuoni (3), Jesús C. Pueyo(1) and Gregorio Rábago (3)
(1) Department of Radiology, Clínica Universitaria, Universidad de Navarra, Avenida Pio XII, 36, 31008 Pamplona, Spain
(2) Department of Radiology, Universita di Roma Sapienza. Ospedale Sant. Andrea, Via di Grottarossa, 1035, 00189 Rome, Italy
(3) Department of Cardiovascular Surgery, Clínica Universitaria, Universidad de Navarra, Avenida Pio XII, 36, 31008 Pamplona, Spain
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.
CITA DEL ARTÍCULO Eur Radiol. 2008 Sep;18(9):1791-9. Epub 2008 Apr 17