Portal dosimetry - Open Access .click

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An effective correction algorithm for off‐axis portal dosimetry errors

Medical Physics, 2009
Portal dosimetric images acquired for IMRT pretreatment verification show dose errors of up to 15% near the detector edges as compared to dose predictions calculated by a treatment planning system for these off‐axis regions. A method is proposed to account for these off‐axis effects by precisely correcting the off‐axis output factors, which calibrate ...
Daniel W, Bailey +2 more
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Implementation of IMRT and VMAT using Delta4 phantom and portal dosimetry as dosimetry verification tools

AIP Conference Proceedings, 2016
In this study we analyzed and compared the dose distribution of different IMRT and VMAT plans with the intent to provide pre-treatment quality assurance using two different tools. Materials/Methods: We have used the electronic portal imaging device EPID after calibration to dose and correction for the background offset signal and also the Delta4 ...
Lulzime Daci, Partizan Malkaj
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[Is there a future for dosimetry control by portal imaging?].

Cancer radiotherapie : journal de la Societe francaise de radiotherapie oncologique, 2001
This article deals with the potential benefits of portal imaging as a tool for the dosimetric control of a radiotherapy treatment. In the introduction the advantages of dosimetric control with portal imaging are described. Subsequently, the physical problem is considered between patient exit dose and dose at the level of the portal detector ...
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Evaluation of Portal Dosimetry for VMAT Treatments