Table 2 SBRT Treatment Characteristics
No. of Lesions | Percent | Median | Minimum | Maximum | |
|---|---|---|---|---|---|
623 | |||||
GTV volume (ccm) | 27 | 0.6 | 699 | ||
PTV volume (ccm) | 71.3 | 4.5 | 1074.0 | ||
Single fraction dose (PTV encompassing) in Gy | 12 | 2.1 | 30.0 | ||
Single fraction dose (isocenter) in Gy | 18.48 | 2.95 | 46.9 | ||
Total BED (PTV encompassing) in Gy | 69.4 | 10.4 | 187.5 | ||
Total BED (Isocenter) in Gy | 125.9 | 27.2 | 292.4 | ||
Prescription isodose (%) | 80.0 | 42.0 | 100.0 | ||
Most common prescription isodoses | |||||
95% isodose | 70 | 11.2% | |||
80% isodose | 199 | 31.9% | |||
65% isodose | 131 | 21.0% | |||
60% isodose | 38 | 6.0% | |||
Number of SBRT fractions | 3 | 1 | 13 | ||
1-fraction SBRT | 189 | 30.3 | |||
3-fraction SBRT | 207 | 33.2 | |||
5-fraction-SBRT | 158 | 25.4 | |||
other fractionation schemes | 69 | 11.1 | |||