The effective point of measurement of ionization chambers and the build-up anomaly in MV x-ray beams.

Volume: 35, Issue: 3, Pages: 950 - 958
Published: Mar 1, 2008
Abstract
A precision experimental investigation of the effective point of measurement (EPOM) of ion chambers in megavoltage beams has been carried out. A one-dimensional scanning phantom system was developed with an overall accuracy in the positioning of a chamber of better than 0.15 mm. Depth-dose data were acquired for a 25 MV beam from an Elekta Precise linac (field sizes of 10 x 10 cm and 25 x 25 cm) for measurement depths in the range 0.6-6 cm. The...
Paper Details
Title
The effective point of measurement of ionization chambers and the build-up anomaly in MV x-ray beams.
Published Date
Mar 1, 2008
Volume
35
Issue
3
Pages
950 - 958
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