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Table 1 Patient, tumor and treatment characteristics

From: Clinical results of mean GTV dose optimized robotic guided SBRT for liver metastases

   Total %
Patients   52  
Lesions   91  
Gender    
  Male 30 57.7
  Female 22 42.3
Age Median (range) in years 62 (37–89)
Karnofsky-Index Median (range) in % 90 (60–100)
Primary Tumor    
  Colorectal 22 42.3
  Breast 4 7.7
  Lung 4 7.7
  Other 22 42.3
Extra-hepatic Disease    
  No 33 63.5
  Yes 19 36.5
Time of SBRT    
  At first diagnosis of metastases 14 26.9
  After local therapy 5 9.6
  After chemotherapy 33 63.5
Time to SBRT Median (range) in months 7 (0–56)
Lesions per Treatment    
  1 39 63.9
  2 17 27.9
  3 2 3.3
  4 3 4.9
  Total   
Repeat Procedures    
  2 3 5.8
  3 3 5.8
GTV Volume Median (range) in cc 12 (1–372)
Max GTV Dimension Median (range) in cm 2.8 (1.2–8.9)
PTV Dose per Lesion    
  3 × 15 Gy 21 23.0
  3 × 14 Gy 10 11.0
  3 × 13 Gy 15 20.9
  3 × 12 Gy 14 15.4
  3 × 8-10 Gy 10 11.0
  4 × 7-10 Gy 11 12.1
  5 × 6-9 Gy 10 11.0
PTV Prescription BED Median (range) in Gy 86.1 (40.6–112.5)
GTV Mean BED Median (range) in Gy 142.1 (60.2–165.3)
  1. GTV Gross Tumor Volume, PTV Planning Target Volume, BED Biological Effective Dose