Spatial Resolutions (FWHM mm) for Collimators with Different Crystal Pixel Sizes, Hole Diameters, and Septal Lengths
| Type of collimator | Hole diameter (mm) | Pixel size (mm2) | ||
| 1 | 4 | 9 | ||
| High sensitivity | 0.5 | 1.626 | 2.192 | 3.036 |
| 1 | 3.052 | 3.462 | 3.754 | |
| 1.5 | 4.704 | 5.179 | 5.395 | |
| General Purpose | 0.5 | 1.232 | 2.042 | 3.010 |
| 1 | 2.346 | 2.659 | 3.229 | |
| 1.5 | 3.806 | 3.913 | 4.002 | |
| High resolution | 0.5 | 1.074 | 2.010 | 3.021 |
| 1 | 1.686 | 2.317 | 3.055 | |
| 1.5 | 2.572 | 2.880 | 3.395 | |
Septal thickness of collimators was 0.2 mm.