Calibration of plane parallel ionization chambers: a new service for secondary standard dosimetry laboratories?
Identifieur interne : 000278 ( France/Analysis ); précédent : 000277; suivant : 000279Calibration of plane parallel ionization chambers: a new service for secondary standard dosimetry laboratories?
Auteurs : M. Arib [France, Algérie] ; H. Chekerker [Algérie] ; S. Benmokhtar [Algérie] ; A. Meghzifene [Algérie]Source :
- Medical Dosimetry [ 0958-3947 ] ; 2001.
Descripteurs français
- KwdFr :
- MESH :
- normes : Calibrage, Guides de bonnes pratiques cliniques comme sujet, Laboratoires, Radiométrie.
- radiothérapie : Tumeurs.
- Humains, Informatique mathématique, Radio-isotopes du cobalt, Rayonnement ionisant, Électrons.
English descriptors
- KwdEn :
- MESH :
- chemical : Cobalt Radioisotopes.
- radiotherapy : Neoplasms.
- standards : Calibration, Laboratories, Practice Guidelines as Topic, Radiometry.
- Electrons, Humans, Mathematical Computing, Radiation, Ionizing.
Abstract
This paper presents the results of calibration of PTW Markus and NACP ionization chambers following the procedures outlined in the TRS 381 International Atomic Energy Agency code of practice. According to this dosimetry protocol, calibration of plane parallel chambers follows 2 methods. The first method uses a high-energy electron beam and consists of comparing the plane parallel chamber with a cylindrical chamber whose ND,air calibration factor, traceable to cobalt-60 (60Co), is known, while the second method applies to a 60Co gamma beam whose air kerma rate is known at the calibration point. As the second method is generally applied in Secondary Standard Dosimetry Laboratories, the consistency of calibrations free in-air and in a water phantom has been studied. A close agreement is shown between the 2 methods (the calibration factors differ by at most 0.98%). These results lead to the conclusion that either of the 2 calibration methods can be used, provided that the correction factors given by the TRS 381 code of practice are applied.
Url:
DOI: 10.1016/S0958-3947(01)00077-2
Affiliations:
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ISTEX:41CC1799663B5B50312B95A549D81928152F80D1Le document en format XML
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According to this dosimetry protocol, calibration of plane parallel chambers follows 2 methods. The first method uses a high-energy electron beam and consists of comparing the plane parallel chamber with a cylindrical chamber whose ND,air calibration factor, traceable to cobalt-60 (60Co), is known, while the second method applies to a 60Co gamma beam whose air kerma rate is known at the calibration point. As the second method is generally applied in Secondary Standard Dosimetry Laboratories, the consistency of calibrations free in-air and in a water phantom has been studied. A close agreement is shown between the 2 methods (the calibration factors differ by at most 0.98%). These results lead to the conclusion that either of the 2 calibration methods can be used, provided that the correction factors given by the TRS 381 code of practice are applied.</div></front></TEI><affiliations><list><country><li>Algérie</li><li>France</li></country></list><tree><country name="France"><noRegion><name sortKey="Arib, M" sort="Arib, M" uniqKey="Arib M" first="M" last="Arib">M. Arib</name></noRegion></country><country name="Algérie"><noRegion><name sortKey="Arib, M" sort="Arib, M" uniqKey="Arib M" first="M" last="Arib">M. Arib</name></noRegion><name sortKey="Benmokhtar, S" sort="Benmokhtar, S" uniqKey="Benmokhtar S" first="S" last="Benmokhtar">S. Benmokhtar</name><name sortKey="Chekerker, H" sort="Chekerker, H" uniqKey="Chekerker H" first="H" last="Chekerker">H. Chekerker</name><name sortKey="Meghzifene, A" sort="Meghzifene, A" uniqKey="Meghzifene A" first="A" last="Meghzifene">A. Meghzifene</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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