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Evaluation of GAFCHROMIC® EBT film for CyberKnife® dosimetry
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10.1118/1.2734384
/content/aapm/journal/medphys/34/6/10.1118/1.2734384
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/34/6/10.1118/1.2734384

Figures

Image of FIG. 1.
FIG. 1.

The corrected pixel value to dose calibration curves are shown. Different batches of EBT film were used on different dates. On Aug. 21, the calibration curve for the CyberKnife® beam is compared to a Varian beam for the same batch of EBT film. In November, three separate calibration curves are measured for the CyberKnife® beam.

Image of FIG. 2.
FIG. 2.

The lateral dose profiles measured with EBT film are compared to those measured with the diode and ion chamber for collimator diameters: 5, 7.5, 10, 20, 30, and . All profiles are taken at depth solid water or water at SAD. The profiles are symmetric and therefore half-profiles are shown. All profiles are normalized to 1 on central axis.

Tables

Generic image for table
TABLE I.

Properties of detectors used for small radiation beam dosimetry are shown. A larger number of x’s indicates an advantage for the parameter listed.

Generic image for table
TABLE II.

Physical characteristics of detectors.

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TABLE III.

The percentage depth doses measured with the EBT film are compared to those measured with the diode and ion chamber.

Generic image for table
TABLE IV.

Comparison of the 80%–20% penumbra measured with EBT film, diode, and ion chamber. The standard deviation for all detectors is within .

Generic image for table
TABLE V.

Output factors relative to that of the largest field diameter of measured at in water at SAD . The standard deviation for all detectors is within .

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/content/aapm/journal/medphys/34/6/10.1118/1.2734384
2007-05-10
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Evaluation of GAFCHROMIC® EBT film for CyberKnife® dosimetry
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/34/6/10.1118/1.2734384
10.1118/1.2734384
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