Measurement of backscatter to the monitor chamber of medical accelerators using target charge
- 1 March 1998
- journal article
- Published by Wiley in Medical Physics
- Vol. 25 (3) , 334-338
- https://doi.org/10.1118/1.598203
Abstract
A simple noninvasive method is described for determining the backscatter to a monitor chamber of a medical accelerator based on the measurement of charge deposited in the target. This method is compared quantitatively to the more elaborate telescopic method for photon beams of 6 MV and 15 MV on linear accelerators having mica and Kapton monitor chambers. The new target charge method gives results consistent with the telescopic method to within 0.3%.Keywords
This publication has 8 references indexed in Scilit:
- Flattening-filter-based empirical methods to parametrize the head scatter factorMedical Physics, 1996
- Extrafocal radiation: A unified approach to the prediction of beam penumbra and output factors for megavoltage x‐ray beamsMedical Physics, 1995
- Backscatter into the beam monitor chamber: Implications for dosimetry of asymmetric collimatorsMedical Physics, 1993
- Telescopic measurements of backscattered radiation from secondary collimator jaws to a beam monitor chamber using a pair of slitsMedical Physics, 1989
- Output factor constituents of a high‐energy photon beamMedical Physics, 1988
- Measurement of beam current and evaluation of scatter production in an 18-MeV acceleratorMedical Physics, 1987
- The effect of collimator backscatter radiation on photon output of linear acceleratorsMedical Physics, 1987
- Characteristics of an 18 MV photon beam from a Therac 20 Medical Linear AcceleratorMedical Physics, 1981