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Table 4 Summary of calculated D90 (as percentage of prescription dose) and overlap index for 4 patients who received external beam radiation therapy for medically inoperable endometrial cancer

From: Dosimetric feasibility of stereotactic body radiation therapy as an alternative to brachytherapy for definitive treatment of medically inoperable early stage endometrial cancer

Patient 1 D90 (% prescription dose) Overlap index
CTV uterus 110.2  
Fraction 1 110.0 0.86
Fraction 2 97.4 0.74
Fraction 3 105.7 0.89
Fraction 4 101.1 0.83
Patient 2 D90 (% prescription dose) Overlap index
CTV uterus 100.7  
Fraction 1 100.6 0.92
Fraction 2 100.6 0.93
Fraction 3 100.5 0.89
Fraction 4 96.4 0.80
Patient 3 D90 (% prescription dose) Overlap index
CTV uterus 100.5  
Fraction 1 96.9 0.83
Fraction 2 99.8 0.89
Fraction 3 100.3 0.92
Fraction 4 100.4 0.92
Patient 4 D90 (% prescription dose) Overlap index
CTV uterus 103.9  
Fraction 1 87.4 0.86
Fraction 2 98.8 0.90
Fraction 3 84.2 0.82
Fraction 4 109.7 0.99
Mean 99.4 0.87
Range 84.2 - 110.0 0.74 - 0.99
  1. The values reflect calculation of radiation doses on megavoltage CT image guidance scans obtained at the time of treatment, using sample SBRT plans.