Table 1 X-ray machine and CT scanner properties
Parameters | CR | CT |
|---|---|---|
Model | GE silhouette VR | GE Brightspeed, 4 slice |
Size | Static/floor mounted | Bulky/fixed |
Manufactured | 2003 | 2007 |
Installation | 2012 | 2012 |
Tube current (mA), range | 10–600 | 10–350 |
Tube potential (kVp), range | 40–150 | 80, 100, 120, 140 |
Exposure time in CR (s) and gantry rotation time in CT (s), range | 0.001–6.3 | 0.75–4 |
Minimum beam filter thickness | 2.7 mmAl | Not known |
Collimation | Available/perimeter | Available/slice thickness |
Gantry aperture diameter (cm) | Not applicable | 85 |
Detectors | Detachable/PSP plates | Inherent |
Image viewing | On-screen and film | On-screen and film |
Quality control | Restorative maintenance | Preventive maintenance |