TABLE I.
Collimator Hole Features and Corresponding Cone Angles
| Collimator | Hole Diameter (mm) | Hole Length (mm) | Hole angle |
|---|---|---|---|
| GAP Philips | 1.4 | 25.4 | 3.1272° |
| HR Siemens | 1.11 | 24.05 | 2.644° |
| HR Siemens | 5.54 | 24.05 | 6.0456° |
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