Publications by authors named "Ole Noerrevang"
Article Synopsis
- An independent dosimetry audit for proton therapy delivery is recommended to ensure consistent treatments across different centers; this study outlines a methodology developed through collaboration between MedAustron and the National Physical Laboratory.
- The auditing process involved using phantoms—one homogeneous and one anthropomorphic—dosed with ionization chambers, alanine pellets, and radiochromic films to evaluate treatment accuracy under different scenarios.
- Results showed that measurements using alanine pellets and ionization chambers were consistent, with minimal deviations from predicted doses; the successful application of this audit method at five proton centers suggests it could be valuable for future clinical trial credentialing in proton beam therapy.
The use of ionization chambers in linac radiotherapy dosimetry requires various corrections to the measured charges, one of these being the recombination correction. The recombination correction factor (k(s)) is generally estimated from the two-voltage analysis (TVA) for each beam quality. However, it is possible that the ionization chamber above some threshold polarizing voltage does not follow the accepted Boag theory very well.
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