Table 2 Radiosurgical prescription parameters.

From: Pseudoprogression and peritumoral edema due to intratumoral necrosis after Gamma knife radiosurgery for meningioma

Characteristics

N = 127

50% Marginal dose (Gy)

14.0

125 (98.4%)

13.5

1 (0.8%)

13.0

1 (0.8%)

Coverage (%)

98.1 ± 2.7

Selectivity (%)

70.7 ± 12.5

Gradient index

2.76 ± 0.18

70% dose volume (cc)

0.9 ± 0.9

70% dose ratio (%)

55.6 ± 8.5

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