Table 2:
CT systems and CT acquisition parameters across the four sites.
| Site | Scanner # | Vendor | Model | |||||
|---|---|---|---|---|---|---|---|---|
| I | 1 | GE | Optima CT580 | |||||
| 2 | GE | Optima CT660 | ||||||
| 3 | GE | Revolution CT | ||||||
| 4 | GE | Discovery CT750 HD | ||||||
| 5 | GE | Discovery CT750 HD | ||||||
| 6 | Siemens | SOMATOM Definition Edge | ||||||
| II | 1 | Siemens | SOMATOM Definition Flash | |||||
| III | 1 | Siemens | SOMATOM Definition Flash | |||||
| 2 | Siemens | SOMATOM Force | ||||||
| IV | 1 | Siemens | SOMATOM Definition Flash | |||||
| 2 | Siemens | SOMATOM Force | ||||||
| 3 | Philips | Brilliance iCT256 | ||||||
| 4 | Philips | Ingenuity CT | ||||||
| CT Acquisition Parameters | ||||||||
| Protocol | 1 | 2 | 3 | 4 | 5 | |||
| Axial | Axial | Helical | Helical | AAPM | ||||
| kV | 120 | |||||||
| mAs | 500 | 250 | 250 | 125 | AEC | |||
| Slice thickness (mm) | 1.25 | 5 | ||||||
| Recon FOV (cm 2 ) | 20×20 | |||||||
| CTDIvol (mGy) | ~46 | ~23 | ~40 | ~20 | ~18 | |||
| Recon Kernel | Standard of soft tissue-equivalent | |||||||