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- W2350291299 abstract "Objective To assess the effects of the injection rate on the enhancement of coronary veins using 64-slice CT. Method Twenty-five patients without heart disease were divided randomly into group A (n=13) and group B (n=12). The injection rate of the contrast media was 3.5 ml/s and 4.5 ml/s respectively. A single-slice dynamic scan was performed at the level of coronary sinus to define the circulation time from coronary arteries to coronary sinus. Second, bolus tracking was used to carry out MSCTCV and an ROI was plotted inside the ascending aorta. The triggering threshold was 100 Hu. TD (transition delay) was equal to the coronary circulation time. All patients underwent 64-MSCT (Sensation 64; Siemens, Germany) The mean injection dose was (70.69±7.54) ml or (83.5±7.40) ml according to the scan time with 40 ml saline flush. The CT value, display rate and degree of the coronary veins (CS, GCV, MCV, PVLV) and of the relative arteries (LCX, distal RCA, PDA) were compared between the two groups. The display degree of vessels was evaluated using a 0-3 point scale. Results The CT value in the CV and CA of 4.5 ml/s was superior to 3.5 ml/s. The mean CT value of the coronary vessels was (165.02±56.07)-(283.71±56.63) Hu and (137.31±31.07)-(236.55±70.34) Hu respectively. There was a significant difference in the CT values of GCV, MCV, LPV and distal-RCA (P0.05). The display rate of the coronary veins was 100% for two groups. The average score of CV and CA was 2.75, 2.18 in group A and 2.96, 2.53 in group B. There was statistical significance in the display score of CV and CA (P=0.041, 0.029). Conclusion 4.5 ml/s is superior to 3.5 ml/s injection rate for 64-slice CT coronary venography; injection rate is more suitable for patients with advanced heart failure." @default.
- W2350291299 created "2016-06-24" @default.
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- W2350291299 date "2007-01-01" @default.
- W2350291299 modified "2023-09-24" @default.
- W2350291299 title "64-slice CT coronary venography:effects of contrast enhancement with two different injection rates" @default.
- W2350291299 hasPublicationYear "2007" @default.
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