Summary of Camera Models, Collimator Types, and Sample Size Per Model Included in Study
| Camera model | Collimator type | Sample size |
| GE Healthcare, Millennium MG | LEHR | 10 |
| GE Healthcare, Discovery | LEHR | 8 |
| GE Healthcare, Infinia | LEHR | 10 |
| Philips, Vertex | VXGP/VXHR | 8 |
| Siemens, e.cam | LEHR | 8 |
| Siemens, Symbia | LEHR | 8 |
| Philips, Brightview | LEHR | 2 |
| Philips, Cardio 60 | LEHR | 2 |
| Philips, Cardio MD | LEHR | 4 |
VXGP = vertex general purpose; VXHR = vertex high resolution.