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Table 1 Organ-at-risk dose constraints

From: Fractionated radiosurgery for painful spinal metastases: DOSIS - a phase II trial

 

Maximum dose

  

Mean Dose

 
 

Arm B

Arm A

Volume of max dose

Arm B

Arm A

Fractionation Scheme

5 x 4 / 7

10 x 3 / 4.85

 

5x 4/ 7

10x3 / 4.85

Spinal Cord + 1 mm

23.75

35

0.1 cm3

  

Cauda Equina

25

37.5

0.1 cm3

  

Kidney

-

-

 

10

12

Bowel

24

37

1 cm3

-

-

Esophagus

30

40

1 cm3

-

-

Liver

 

-

 

12.5

17.5

  1. Normal tissue constraints depending upon the fractionation schema.