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Table 2 Radiation treatment parameters

From: Stereotactic radiosurgery for glioblastoma: retrospective analysis

 

Median

Minimum

Maximum

Dose @ isocenter (Gy)*

   

   All patients

14

6*

20

   Upfront SRS

13

6*

20

   SRS at recurrence

15

9

20

Peripheral dose (%)

   

   All patients

80

40

100

   Upfront SRS

80

50

100

   SRS at recurrence

80

40

90

Number of isocenters

   

   All patients

2

1

7

   Upfront SRS

1

1

3

   SRS at recurrence

2

1

7

Number of beams/arcs

   

   All patients

12

6

32

   Upfront SRS

12

7

24

   SRS at recurrence

12

6

32

GTV (ml)

   

   All patients

9.2

0.2

85.4

   Upfront SRS

13.2

1.5

85.4

   SRS at recurrence

8.4

0.2

32.2

Upfront fractionated RT dose (all patients)

60

50

65

  1. * because of worsening neurological symptoms, large treatment volume and critical location, one patient was prescribed an unusually low isocenter dose of 6 Gy.
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Radiation Oncology

ISSN: 1748-717X

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