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Feasibility of polymer gel dosimetry measurements in a dynamic porcine lung phantom

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, , Citation P Mann et al 2015 J. Phys.: Conf. Ser. 573 012079 DOI 10.1088/1742-6596/573/1/012079

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1 Department of Medical Physics in Radiation Oncology, German Cancer Research Center, INF 280, 69120 Heidelberg, Germany

2 Department Medical Physics in Radiology, Section of Pulmonary Imaging, University of Heidelberg, INF 280, 69120 Heidelberg, Germany

3 Department of Diagnostic and Interventional Radiology, Section of Pulmonary Imaging, University of Heidelberg, INF 110, 69120 Heidelberg, Germany

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1742-6596/573/1/012079

Abstract

A dynamic ex-vivo porcine lung phantom combined with polymer gel dosimetry is tested as a new tool to validate modern adaptive radiotherapy techniques (e.g. gating or tracking). The gel was inserted into the lung via a latex balloon to simulate a tumor. After irradiation, the location of the dose maximum was verified, however, the dose was higher than planned and a high background signal was seen. Potential reasons for this finding are the nonstandard conditions of gel handling. These conditions were systematically studied. Besides temperature, the material of the balloon seems to be of special importance. The results identify open issues that have to be addressed in future studies.

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10.1088/1742-6596/573/1/012079