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Table 2 SBRT Treatment Characteristics

From: The SBRT database initiative of the German Society for Radiation Oncology (DEGRO): patterns of care and outcome analysis of stereotactic body radiotherapy (SBRT) for liver oligometastases in 474 patients with 623 metastases

  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    
  1. GTV gross target volume, PTV planning target volume, BED biological effective dose