Keywords:
Embolism / Thrombosis, Contrast agent-intravenous, CT-Angiography, CT, Pulmonary vessels, Cardiovascular system
Authors:
A. Kosmala, P. gruschwitz, A. Weng, T. A. Bley, B. Petritsch; Würzburg/DE
Results
Overall, data from 165 patients was included (Fig. 1 and 2; groups 1-4 [n]: 40, 41, 43, 41). Mean subjective quality of iodine maps was rated significantly lower in group 4 (2.0±0.7) compared to groups 1-3 (p<.001, respectively; 1: 1.3±0.5; 2: 1.3±0.5; 3: 1.4±0.7), while the other groups showed no significant differences. Mean subjective quality of CTPA datasets was high for all groups (1: 1.1±0.4; 2: 1.3±0.6; 3: 1.2±0.5; 4: 1.5±0.7). Mean total PBV was significantly higher for groups 1 and 2 (34.0±8.9 and 34.4±11.9) vs. groups 3 and 4 (24.9±6.4 and 19.3±5.5) (p<.001, respectively; group 1 vs. 2: n.s.). Group 1 presented with highest mean attenuation (428,7±112.1 vs. groups 2-4: 332.8±146.0, 352.7±109.1, 298.5±89.1; p<.001, respectively) and CNR in the PA (25.2±7.3 vs. groups 2-4: 19.0±7.2, 21.5±8.0; 16.6±5.8; p<.001, respectively). There was no significant difference in DLP between the groups.