Scan details
| Canon Aquilion ONE | Philips IQon | Prototype DL-CBCT | |
|---|---|---|---|
| Tube (kV) | 100 | 120 | 120 |
| Tube current (mAs/mA) (average) | 196 (Auto-modulation) | 114 (Auto-modulation) | 310 |
| Scan time/rotation time (sec) | 3.3/0.5 (Full rotation) | 2.5/0.3 (Full rotation) | 20.0/20.0 (200° rotation) |
| Nominal beam width (mm) | 80 × 0.500 | 64 × 0.625 | 194.700 |
| Pitch factor | 0.813 | 0.671 | NA |
| Display FOV coronal × sagittal × axial (mm3) | 210.9 × 210.9 × 160.0 | 210.0 × 210.0 × 160.0 | 251.8 × 251.8 × 194.7 |
| Section thickness (mm) | 0.50 | 0.67 | 0.66 |
| Matrix size | 512 × 512 | 512 × 512 | 384 × 384 |
| Reconstruction kernel | FC43 | Filter UA | Ståhl et al15a |
| Reconstruction algorithm | AIDR 3D eStandard | iDose4 level 4 | Ståhl et al15a |
| Avg CTDIvol (16-cm phantom) | 20.0 mGy | 21.3 mGy | NA |
| Air kerma (in an 18-cm water phantom)b | NA | NA | 57.6 mGy |
| MTFc | 50%: 3.78 | 50%: 3.46 | 50%: 3.57 |
| 10%: 6.57 | 10%: 6.65 | 10%: 6.04 |
Note:—CTDIvol indicates volume CT dose index; MTF, modulation transfer function; NA, not applicable.
↵a Details of the prototype algorithm are described in Ståhl et al.15
↵b Air kerma in an 18-cm diameter plastic water phantom at the center of the scan length, measured in accordance with American Association of Physicists in Medicine Task Group Report 111.26
↵c Generated from consecutive scans of the upper bead of a Catphan CTP528 module (The Phantom Laboratory).