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Average Displacements (Ranges) of the Radiation Isocenter From the Virtual Isocenter (Lasers).
| ΔX (mm) | ΔY (mm) | ΔZ (mm) | 3D (mm) | |
|---|---|---|---|---|
| ICP-MR | −0.40 (−0.3 to −05) | 0.18 (−0.1 to 04) | 0.20 | 0.48 |
| Film | −0.04 | 0.16 | −0.20 | 0.26 |
| Difference | −0.36 | 0.02 | 0.40 | 0.54 |
Abbreviations: 3D, 3-dimensional; ICP-MR, ion chamber profiler (MR-safe).
