Table 2. Tumor characteristics and planning parameters for the second single-fraction stereotactic radiosurgery with 20 Gy.
*The %IDSs represent a uniform prescription dose of 20 Gy relative to Dmax (100%).
**The number of shots (isocenters) and the collimator sizes and combinations in the parentheses.
Lt, left; Rt, right; GTV, gross tumor volume; IDS, isodose surface; Dmax, maximum dose
| Tumor location | Lt parietal | Rt frontal | Rt cerebellar |
| GTV (cm3) | 2.19 | 1.39 | 0.20 |
| GTV marginal dose (Gy) | 20 | 20 | 20 |
| %IDS* | 60% | 60% | 85% |
| Dmax (Gy) | 33.3 | 33.3 | 23.5 |
| Shot(s) (collimator) | 17 shots (8 and 16 mm) | 12 shots (8 and 16 mm) | 1 shot (8 mm) |