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Table 2 Gamma index (3%/3 mm)-based passing rates for transit dose measured with an homogeneous phantom

From: Feasibility study on the verification of actual beam delivery in a treatment room using EPID transit dosimetry

 

Patient 1 (%)

Patient 2 (%)

Patient 3 (%)

Patient 4 (%)

Field 1

92.6 (8.6 × 7 cm2)

96.6 (6.8 × 4.5 cm2)

92.0 (8.6 × 6.1 cm2)

95.6 (6.6 × 5 cm2)

Field 2

92.7 (8.3 × 7 cm2)

95.5 (6.3 × 4.8 cm2)

95.0 (7.8 × 6.3 cm2)

95.1 (6.3 × 5 cm2)

Field 3

90.8 (8.7 × 7 cm2)

95.7 (6.6 × 4.8 cm2)

96.5 (6.6 × 6.3 cm2)

95.6 (5.6 × 5 cm2)

Field 4

91.3 (9.3 × 7 cm2)

95.3 (6.6 × 4.8 cm2)

93.6 (6.5 × 6.3 cm2)

95.3 (5.9 × 5 cm2)

Field 5

92.7 (8.6 × 7 cm2)

95.4 (7.1 × 4.8 cm2)

93.1 (8.3 × 6.1 cm2)

95.4 (6.6 × 5 cm2)

Field 6

91.9 (8.6 × 7 cm2)

97.4 (6.3 × 4.8 cm2)

90.1 (8.3 × 6.1 cm2)

95.8 (5.8 × 5 cm2)

Mean

92.0

96.0

93.4

95.4

SD

0.8

0.9

2.2

0.3

  1. Parenthesis under the passing rates denotes the collimator (jaw) size of each beam.
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Radiation Oncology

ISSN: 1748-717X

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