<abstract xmlns="http://www.w3.org/1999/xhtml"> The main objective of this study was to investigate the Fricke dosimeter water equivalent system for measurement of dosimetric parameters for photon beam. The parameters measured with the Fricke dosimeter were compared to those obtained with an ionization chamber. In this work characteristics for 60Co γ-rays of field sizes ranging from 5 × 5 cm2 to 20 × 20 cm2 are reported. The measurements were carried out in the secondary standard dosimetry laboratory using a collimated 60Co gamma source therapy unit. The 60Co beam output in terms of absorbed dose to water was obtained as per IAEA TRS 398 recommendations using cylindrical ionization chamber, whose ND,w has been supplied by the IAEA's reference laboratory. Specific quantities measured include: output factors, peak scatter factor, lateral beam profiles and percentage depth dose. The Fricke dosimeters were irradiated in a water phantom using the suitable poly (methyl methacrylate), PMMA stand. Our results demonstrate that Fricke dosimeter and ionization chamber agree with each other.</abstract>

The main objective of this study was to investigate the Fricke dosimeter water equivalent system for measurement of dosimetric parameters for photon beam. The parameters measured with the Fricke dosimeter were compared to those obtained with an ionization chamber. In this work characteristics for 60Co γ-rays of field sizes ranging from 5 × 5 cm2 to 20 × 20 cm2 are reported. The measurements were carried out in the secondary standard dosimetry laboratory using a collimated 60Co gamma source therapy unit. The 60Co beam output in terms of absorbed dose to water was obtained as per IAEA TRS 398 recommendations using cylindrical ionization chamber, whose ND,w has been supplied by the IAEA's reference laboratory. Specific quantities measured include: output factors, peak scatter factor, lateral beam profiles and percentage depth dose. The Fricke dosimeters were irradiated in a water phantom using the suitable poly (methyl methacrylate), PMMA stand. Our results demonstrate that Fricke dosimeter and ionization chamber agree with each other.

A standard Fricke dosimeter compared to an ionization chamber used for dosimetric characterization of 60Co photon beam

Department of medical physics, Nuclear Research Center of Algiers, 02 Boulevard Frantz Fanon B.P. 399 Alger -Gare, Algeria

Polish Journal of Medical Physics and Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

A standard Fricke dosimeter compared to an ionization chamber used for dosimetric characterization of Co photon beam

The main objective of this study was to investigate the Fricke dosimeter water equivalent system for measurement of dosimetric parameters for photon beam. The...

A standard Fricke dosimeter compared to an ionization chamber used for dosimetric characterization of ⁶⁰Co photon beam

Published Online: Jul 02, 2016

Page range: 19 - 24

DOI: https://doi.org/10.1515/pjmpe-2016-0005

Keywords
Fricke dosimeter, dosimetric parameters, radiotherapy, 60Co, ionization chamber

© Polish Society of Medical Physics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

A standard Fricke dosimeter compared to an ionization chamber used for dosimetric characterization of 60Co photon beam

Published Online: Jul 02, 2016

Page range: 19 - 24

DOI: https://doi.org/10.1515/pjmpe-2016-0005

KeywordsFricke dosimeter, dosimetric parameters, radiotherapy, 60Co, ionization chamber

© Polish Society of Medical Physics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

A standard Fricke dosimeter compared to an ionization chamber used for dosimetric characterization of ⁶⁰Co photon beam

Keywords
Fricke dosimeter, dosimetric parameters, radiotherapy, 60Co, ionization chamber