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Table 2 FWHM and penumbra values measured in the PMMA phantom and the solid water phantom (SW) and calculated by LGP

From: Development of a PMMA phantom as a practical alternative for quality control of gamma knife® dosimetry

 

FWHM (mm)

Penumbra (mm)

Axis

PMMA

LGP6.93a

SW

LGP8.0b

PMMA

LGP6.93a

SW

LGP8.0b

x

21.83 ± 0.25

21.68

21.57 ± 0.27

21.75

9.58 ± 0.22

9.04

8.76 ± 0.19

9.03

y

22.10 ± 0.32

21.68

21.56 ± 0.27

21.75

9.86 ± 0.18

9.04

8.96 ± 0.23

9.03

z

17.46 ± 0.11

17.39

17.41 ± 0.17

17.44

2.72 ± 0.10

3.09

2.65 ± 0.14

2.55

  1. Legend: aCalculated by Leksell Gamma Plan at the center of the PMMA phantom (LGP6.93)
  2. bCalculated by Leksell Gamma Plan and at the center of a sphere with a radius of 8.0 cm (LGP8.0)
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Radiation Oncology

ISSN: 1748-717X

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