Determination of beam parameters for unflattened photon beams
AssigneeSiemens Aktiengesellschaft
InventorChristian EHRINGFELD
Life of this patent
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Abstract
A method for determining a beam parameter of an unflattened photon beam generated by an accelerator includes measuring radiation dose values in the plane perpendicular to the beam propagation direction, determining the extension of the unflattened beam using a definition of the beam extension of a flattened beam. The method also includes normalizing the radiation dose values, such that essentially the same value for the extension of the unflattened beam is obtained as would be obtained if the beam was flattened and determining the beam parameter of the unflattened beam using a beam parameter definition of a flattened beam
Claims8
A method for determining a beam parameter of an unflattened photon beam generated by an accelerator, the method comprising:
- measuring radiation dose values in a plane perpendicular to the beam propagation direction;
- determining the extension of the unflattened photon beam using a definition of the beam extension of a flattened beam;
- normalizing, by a computer unit, the radiation dose values, such that the same value is obtained for the extension of the unflattened beam as would be obtained if the beam was flattened;
- and
- determining the beam parameter of the unflattened beam using a beam parameter definition of the flattened beam.
An apparatus for determining a beam parameter of an unflattened photon beam generated by an accelerator, the apparatus comprising:
- a measuring facility for measuring radiation dose values in the plane perpendicular to the beam propagation direction;
- and
- a computer unit configured to normalize the radiation dose values, such that essentially the same value is obtained for the extension of the unflattened beam as would be obtained if the beam was flattened.
Dependencies are inferred from the claim text.