A new look at displacement factor and point of measurement corrections in ionization chamber dosimetry | Zendy

Awschalom Miguel | Zendy; Rosenberg Ivan | Zendy; Ten Haken Randall K. | Zendy

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A new look at displacement factor and point of measurement corrections in ionization chamber dosimetry

Author(s) -

Awschalom Miguel,

Rosenberg Ivan,

Ten Haken Randall K.

Publication year - 1983

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 - 10.1118/1.595260

Subject(s) - ionization chamber , dosimetry , displacement (psychology) , physics , ionization , absorbed dose , ionizing radiation , radiation , optics , point (geometry) , neutron , computational physics , dosimeter , nuclear medicine , nuclear physics , irradiation , mathematics , ion , medicine , psychology , geometry , quantum mechanics , psychotherapist

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.

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