Subjective evaluation for the 2D DSA regarding the depiction of simulated aneurysms
| Contrast Material Concentration & Dose Mode | Score for Image Quality | P | |||||
|---|---|---|---|---|---|---|---|
| 5 | 4 | 3 | 2 | 1 | Mean ± SD* | ||
| 300 mgI/mL | |||||||
| Standard-dose mode of FPD system | 57 | 0 | 0 | 0 | 0 | 5.00 ± 0.00** | .038 |
| Low-dose mode of FPD system | 57 | 0 | 0 | 0 | 0 | 5.00 ± 0.00** | .038 |
| Conventional-dose mode of I.I.-TV system | 52 | 3 | 2 | 0 | 0 | 4.88 ± 0.43 | |
| 150 mgI/mL | |||||||
| Standard-dose mode of FPD system | 55 | 1 | 1 | 0 | 0 | 4.95 ± 0.29** | <.001 |
| Low-dose mode of FPD system | 52 | 4 | 1 | 0 | 0 | 4.90 ± 0.36** | <.001 |
| Conventional-dose mode of I.I.-TV system | 41 | 10 | 5 | 1 | 0 | 4.60 ± 0.73 | |
| 100 mgI/mL | |||||||
| Standard-dose mode of FPD system | 41 | 12 | 4 | 0 | 0 | 4.65 ± 0.61** | <.001 |
| Low-dose mode of FPD system | 39 | 13 | 5 | 0 | 0 | 4.60 ± 0.65** | <.001 |
| Conventional-dose mode of I.I.-TV system | 1 | 15 | 26 | 13 | 2 | 3.00 ± 0.85 | |
Note:—DSA indicates digital subtraction angiography; FPD, flat panel detector; I.I.-TV, image intensifier television. Data are mean ± SD of scores for image quality evaluated using a 5-point scale (1, clearly visualized; 2, good; 3, reasonably good; 4, poor; 5, very poor)
** Significantly higher to I.I.-TV system (the Wilcoxon signed rank test).