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Table 3 Target volume dosimetric comparison of stereotactic body radiation therapy and intracavitary brachytherapy

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

Site

Volume

Mean dose (per fx) ± SD

p-value

I-BT

SBRT

Uterus

    
 

V150%

22.66 ± 7.21

16.66 ± 5.44

0.05

 

D95% (Gy)

2.34 ± 1.26

8.34 ± 0.05

<0.005

 

D90% (Gy)

2.76 ± 1.44

8.69 ± 0.09

<0.005

 

D50% (Gy)

6.06 ± 2.88

10.48 ± 0.31

<0.005

BoostCTV

    
 

D90% (Gy)

5.62 ± 3.79

12.10 ± 0.45

<0.005

PTV

    
 

D90% (Gy)

2.48 ± 1.27

7.98 ± 0.25

<0.005

  1. Abbreviations: SD standard deviation, I-BT intracavitary brachytherapy, SBRT stereotactic body radiation therapy, fx fraction, V150% the percentage volume of the structure receiving 150 percent of the prescription dose of 8.5 Gy, D(x)% the highest dose received by x percent of the volume.