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A method of measuring the primary dose component in high‐energy photon beams
Author(s) -
Nizin Paul,
Kase Kenneth
Publication year - 1988
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.596286
Subject(s) - component (thermodynamics) , photon , dosimetry , physics , energy (signal processing) , optics , medical physics , nuclear medicine , medicine , quantum mechanics
We present an approach for deriving the primary component of dose from measurements in a megavoltage gamma or x‐ray beam. The theoretical development of the approach is discussed showing that primary dose can be obtained from four measurements of ionization in narrow beam geometry and two measurements of ionization in a large beam in a phantom. The uncertainty in the final result is analyzed and is about an order of magnitude greater than the uncertainty in an individual measurement.