A new look at displacement factor and point of measurement corrections in ionization chamber dosimetry
- 1 May 1983
- journal article
- research article
- Published by Wiley in Medical Physics
- Vol. 10 (3), 307-313
- https://doi.org/10.1118/1.595260
Abstract
A new technique is presented for determination of the effective point of measurement when cavity ionization chambers are used to measure the absorbed dose due to ionizing radiation in a dense medium. An algorithm is derived relating the effective point of measurement to the displacement correction factor. This algorithm relates variations of the displacement factor to the radiation field gradient. The technique is applied to derive the magnitudes of the corrections for several chambers in a p(66)Be(49) neutron therapy beam.Keywords
Funding Information
- Presbyterian Historical Society (5P01CA18081‐07)
- National Cancer Institute