Evaluation of an Electronic Portal Imaging Device for Transit Dosimetry

Authors

  • Xiaodong He From the Department of Oncology, Section Radiation Physics, University Hospital Leuven, Belgium
  • Ann Van Esch From the Department of Oncology, Section Radiation Physics, University Hospital Leuven, Belgium
  • Rita Reymen From the Department of Oncology, Section Radiation Physics, University Hospital Leuven, Belgium
  • Dominique Huyskens From the Department of Oncology, Section Radiation Physics, University Hospital Leuven, Belgium

DOI:

https://doi.org/10.1080/028418699431177

Abstract

The possibility of using a commercially available electronic portal imaging device for transit dosimetry was investigated. The detection unit of the device comprises a metal plate/fluorescence screen and a camera. Basic parameters of this system were investigated: stability, detector uniformity, dose-response curve, field-size dependence and phantom-thickness dependence. It was found that in terms of relative dosimetry, portal images corrected for detector non-uniformity are in good agreement (within 5%) with transit dose distributions measured by film dosimetry. For dose determination, it was found that the use of the device is hampered by an important field-size dependence and phantom-thickness dependence. Both correction factors should be applied if the device is to be used for this purpose.

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Published

1999-01-01

How to Cite

He, X., Van Esch, A., Reymen, R., & Huyskens, D. (1999). Evaluation of an Electronic Portal Imaging Device for Transit Dosimetry. Acta Oncologica, 38(5), 591–596. https://doi.org/10.1080/028418699431177