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Table 5 Mean dose fall-off distance to decrease from the isodose prescription 100 to 80, 60, 50 and 20% towards the OAR direction or not for the targets close to the brainstem

From: Dosimetric study between a single isocenter dynamic conformal arc therapy technique and Gamma Knife radiosurgery for multiple brain metastases treatment: impact of target volume geometrical characteristics

 

Mean R 100–80 (mm)

Mean R 100–60 (mm)

Mean R 100–50 (mm)

Mean R 100–20 (mm)

GP

MBM

GP

MBM

GP

MBM

GP

MBM

No OAR

0.9 ± 0.5

1.2 ± 0.3

2.1 ± 1.1

2.6 ± 0.9

2,9 ± 1.6

3.6 ± 1.4

8.3 ± 5.5

12,3 ± 7

OAR

0.9 ± 0.4

1.1 ± 0.2

2.3 ± 1.2

2.5 ± 0.6

3.3 ± 1.7

3.5 ± 1.2

9.7 ± 5.3

11.4 ± 5.4

Total

0.9 ± 0.5

1.2 ± 0.3

2.2 ± 1.1

2.6 ± 0.8

3 ± 1.6

3.6 ± 1.3

8.6 ± 5.4

12 ± 6.6

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Radiation Oncology

ISSN: 1748-717X

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