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Table 3 Planning summary for 73 lesions (30 patients)

From: Hippocampal avoidance with volumetric modulated arc therapy in melanoma brain metastases – the first Australian experience

Specification

Abbrev.

Units

No*

Median

Mean

Minimum

Maximum

Whole-brain radiotherapy (Gy)*

WBRT

pts*

23

30.0

30.6

28.6

37.5

Fraction

Frx

les

73

10.0

11.8

5.0

15.0

Dose to hippocampus with HA ) (Gy)

HA

pt

20

21.9

20.4

8.4

32.2

without HA (Gy)

-

pts

10

29.0

41.1

24.3

56.5

Simultaneous integrated boost (Gy)

SIB

pts

29

45.0

44.8

20.0

70.8

Gross target volume (cc)*

GTV

les*

71

0.6

6.9

0.02

291.3

Planning target volume (cc)

PTV

les

67

3.3

13.3

0.4

344.0

Prescription isodose volume (cc)

PIV

les

64

2.4

12.6

0.1

389.0

Maximum dose (Gy)*

MD

les

73

45.6

47.1

22.0

72.0

Prescription dose (Gy)

PD

les

71

45.0

44.8

20.0

70.8

Conformity index

PITV

les

64

3.2

8.6

0.2

70.0

Homogeneity

MDPD

les

71

1.06

1.06

1.01

1.10

Beam time (min)

BT

les

68

3.4

3.6

1.2

6.3

  1. No*: number, (Gy)*: Graypts*: patient, les*: lesion, (cc)*: cubic centimetre, (Gy)*: Gray.