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.
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.
Properties of detectors used for small radiation beam dosimetry are shown. A larger number of x’s indicates an advantage for the parameter listed.
Physical characteristics of detectors.
The percentage depth doses measured with the EBT film are compared to those measured with the diode and ion chamber.
Comparison of the 80%–20% penumbra measured with EBT film, diode, and ion chamber. The standard deviation for all detectors is within .
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 .
Article metrics loading...
Full text loading...