TY - JOUR
T1 - Dosimetric evaluation of a 2D pixel ionization chamber for implementation in clinical routine
AU - Herzen, J.
AU - Todorovic, M.
AU - Cremers, F.
AU - Platz, V.
AU - Albers, D.
AU - Bartels, A.
AU - Schmidt, R.
PY - 2007/2/21
Y1 - 2007/2/21
N2 - In this paper we present the results of a dosimetric evaluation of a 2D ionization chamber array with the objective of its implementation for quality assurance in clinical routine. The pixel ionization chamber MatriXX (Scanditronix Wellhofer, Germany) consists of 32 × 32 chambers with a distance of 7.6 mm between chamber centres. The effective depth of measurement under the surface of the detector was determined. The dose and energy dependence, the behaviour of the device during its initial phase and its time stability as well as the lateral response of a single chamber of the detector in cross-plane and diagonal directions were analysed. It could be shown, that the detector's response is linear with dose and energy independent. Taking the lateral response into account, two different dose profiles, for a pyramidal and an IMRT dose distribution, were applied to compare the data generated by a treatment planning system with measurements. From these investigations it can be concluded that the detector is a suitable device for quality assurance and 2D dose verifications.
AB - In this paper we present the results of a dosimetric evaluation of a 2D ionization chamber array with the objective of its implementation for quality assurance in clinical routine. The pixel ionization chamber MatriXX (Scanditronix Wellhofer, Germany) consists of 32 × 32 chambers with a distance of 7.6 mm between chamber centres. The effective depth of measurement under the surface of the detector was determined. The dose and energy dependence, the behaviour of the device during its initial phase and its time stability as well as the lateral response of a single chamber of the detector in cross-plane and diagonal directions were analysed. It could be shown, that the detector's response is linear with dose and energy independent. Taking the lateral response into account, two different dose profiles, for a pyramidal and an IMRT dose distribution, were applied to compare the data generated by a treatment planning system with measurements. From these investigations it can be concluded that the detector is a suitable device for quality assurance and 2D dose verifications.
UR - http://www.scopus.com/inward/record.url?scp=34247170048&partnerID=8YFLogxK
U2 - 10.1088/0031-9155/52/4/023
DO - 10.1088/0031-9155/52/4/023
M3 - Article
C2 - 17264380
AN - SCOPUS:34247170048
SN - 0031-9155
VL - 52
SP - 1197
EP - 1208
JO - Physics in Medicine and Biology
JF - Physics in Medicine and Biology
IS - 4
M1 - 023
ER -