A new extended-length parallel-plate ionization chamber

A special parallel-plate ionization chamber was developed. The motivation for the construction of this new chamber was mainly to fulfil the need of a reference system for computed tomography standard beams in the Calibration Laboratory of IPEN. However, the chamber was tested also in standard radiat...

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Bibliographic Details
Published inPhysics in medicine & biology Vol. 50; no. 16; pp. 3837 - 3847
Main Authors Maia, Ana F, Caldas, Linda V E
Format Journal Article
LanguageEnglish
Published England IOP Publishing 21.08.2005
Subjects
Biophysics - methods
Calibration
Dose-Response Relationship, Radiation
Ions
Mammography - methods
Particle Accelerators
Phantoms, Imaging
Radiation Dosage
Radiometry - methods
Radiotherapy Planning, Computer-Assisted
Radiotherapy, High-Energy - instrumentation
Technology, Radiologic
X-Ray Therapy
X-Rays
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Summary:A special parallel-plate ionization chamber was developed. The motivation for the construction of this new chamber was mainly to fulfil the need of a reference system for computed tomography standard beams in the Calibration Laboratory of IPEN. However, the chamber was tested also in standard radiation beams of mammography and conventional diagnostic radiology. The chamber was manufactured at the institute workshop, as simply and cheaply as possible. Its design differs from the common ionization chambers used in dosimetric procedures of computed tomography equipment, because it is a parallel-plate chamber instead of a cylindrical chamber. However, its dimensions and sensitive volume are very similar to those of a commercial pencil ionization chamber. The new ionization chamber was submitted to several characterization and quality control tests, showing its very good performance.
ISSN:0031-9155
1361-6560
DOI:10.1088/0031-9155/50/16/012