CT Parameters Collected from 154 Sites for 2010–2014
| Parameter* | ||||||||
| Manufacturer | Systems (n) | Datasets (n) | Installation year | kVp | mA | Rotation time (s) | Pitch | Collimation (mm) |
| GE Healthcare | 81 | 124 | 2001–2013 | 126 (100–140) | 147 (41–450) | 0.7 (0.4–1) | 1.3 (0.516−2) | 32 (10–40) |
| Philips Healthcare | 20 | 27 | 2004–2013 | 121 (120–140) | 105 (44–200) | 0.5 (0.25–0.75) | 0.8 (0.5–0.938) | 28 (12–40) |
| Siemens Healthcare | 56 | 80 | 2003–2012 | 121 (120–130) | 104 (20–325) | 0.5 (0.3–1) | 1 (0.7–2) | 16 (5–28.8) |
| Toshiba | 1 | 1 | 2005 | 120 | 50 | 0.5 | 0.938 | 32 |
↵* Data are mean followed by range in parentheses.