Table 1.
CT protocol | Acquisition | Detector coverage | Pitch | Table speed | Rotation time | Kv | mA max | ASIR | Matrix | FOV | |
Skull base | Spiral | 20 cm | 0.531:1 | 10.62 cm/s | 1 s | 120 | 600 | 40% | 512 | 25 cm | |
Cranial | Spiral | 20 cm | 0.531:1 | 10.62 cm/s | 0.8 s | 120 | 280 | 40% | 512 | 25 cm | |
Neck | Spiral | 20 cm | 0.531:1 | 10.62 cm/s | 0.8 s | 120 | 280 | 40% | 512 | 25 cm | |
MRI protocol | Sequence | TR | TE | TI | ET | BW | Matrix | FOV | ST | SP | NEX |
Brain | T2W axial | 5600 ms | 100 ms | – | 22 | 41.67 KHz | 512 × 384 | 26 cm | 5 mm | 1 mm | 2 |
T2W coronal | 4400 ms | 102 ms | – | 22 | 50 KHz | 256 × 256 | 24 cm | 5 mm | 1 mm | 2 | |
T2W coronal | 2800 ms | 102 ms | – | 22 | 41.67 KHz | 320 × 256 | 24 cm | 3 mm | 0 mm | 2 | |
Cervical | T1W sagittal | 3000 ms | 22 ms | Auto | 9 | 41.67 MHz | 384 × 224 | 26 cm | 3 mm | 0 mm | 2 |
Neck | T1W axial | 475 ms | 10 ms | – | 3 | 20.83 KHz | 256 × 256 | 18 cm | 4 mm | 1 mm | 2 |
T2W axial | 4200 ms | 85 ms | – | 13 | 15.63 MHz | 256 × 256 | 18 cm | 4 mm | 1 mm | 3 | |
T1W coronal | 350 ms | 7 ms | – | 3 | 31.25 MHz | 256 × 192 | 18 cm | 4 mm | 1 mm | 1 |
Kv kilovoltage; mA max maximum milliamperage; ASIR adaptive statistical iterative reconstruction; FOV field of view; TR time of repetition; TE time of echo; TI time of inversion; ET echo train; BW bandwidth; ST slice thickness; SP spacing; NEX number of excitations