Table 3.
Head phantom DEQC protocol version 1
| Acquisitions | GSI‐preset | Pitch | Rotation time (s) | mA | CTDIvol (mGy) | Image thickness (mm) |
|---|---|---|---|---|---|---|
| 1, 2 | GSI‐26 | 0.531 | 0.7 | 375 | 67 | 1.25, 3.75 |
| 3, 4 | GSI‐26 | 0.969 | 0.7 | 375 | 36.7 | 1.25, 3.75 |
| 5, 6 | GSI‐20 | 0.531 | 0.5 | 630 | 81.4 | 1.25, 3.75 |
| 7, 8 | GSI‐20 | 0.969 | 0.5 | 630 | 44.6 | 1.25, 3.75 |
| 9, 10 | GSI‐9 | 0.531 | 0.9 | 600 | 132.6 | 1.25, 3.75 |
| 11, 12 | GSI‐9 | 0.969 | 0.9 | 600 | 72.7 | 1.25, 3.75 |
Note: All acquisitions used helical scan mode, beam width of 20 mm, Head SFOV, DFOV of 25 cm, and Standard reconstruction algorithm. A total of five images were acquired per acquisition.