| Number of patients scanned |
28 (patients 1 to 28) |
8 (patients 29 to 36) |
| Scanner |
64-slice scanner (sliding gantry Sensation 64, Siemens Medical Solutions, Forchheim, Germany) |
128-slice scanner (Philips Brilliance iCT; Best, the Netherlands). |
| Total acquisition time |
210 s |
210 s |
| Standard Acquisition |
1 image every 2 s for the first 48 s |
1 image every 2 s for the first 48 s |
| Extended acquisition |
60 s after start 1 image every 30 s |
60 s after start 1 image every 30 s |
| Image acquisition parameters |
80 kVp, 100 mAs |
80 kVp, 100 mAs |
| Collimation |
24 x1.2 mm |
128 x 0.625 mm |
| Brain coverage |
28.8 mm |
40 mm to 80 mm |
| FOV |
300 mm |
220 mm |
| Reconstructed section width |
4.8 mm |
5.0 mm |
| Slice location |
At the level of the third ventricle |
At the level of the third ventricle |
| Contrast material |
Iopromide (Ultravist 300; Bayer HealthCare Pharmaceuticals, Pine Brook, New Jersey) |
Iopromide (Ultravist 300; Bayer HealthCare Pharmaceuticals, Pine Brook, New Jersey) |
| Contrast volume |
40 ml followed by 40 ml of saline |
40 ml followed by 40 ml of saline |
| Injection rate |
4 ml/s via 18 G cannula in the right antecubital vein |
6 ml/s via 18 G cannula in the right antecubital vein |
| Start of acquisition |
7 seconds after the start of injection of contrast agent |
simultaneously with the start of injection of contrast agent |
