The role of a microDiamond detector in the dosimetry of proton pencil beams

Zeitschrift für medizinische Physik
Carles GomàJan Würfel

Abstract

In this work, the performance of a microDiamond detector in a scanned proton beam is studied and its potential role in the dosimetric characterization of proton pencil beams is assessed. The linearity of the detector response with the absorbed dose and the dependence on the dose-rate were tested. The depth-dose curve and the lateral dose profiles of a proton pencil beam were measured and compared to reference data. The feasibility of calibrating the beam monitor chamber with a microDiamond detector was also studied. It was found the detector reading is linear with the absorbed dose to water (down to few cGy) and the detector response is independent of both the dose-rate (up to few Gy/s) and the proton beam energy (within the whole clinically-relevant energy range). The detector showed a good performance in depth-dose curve and lateral dose profile measurements; and it might even be used to calibrate the beam monitor chambers-provided it is cross-calibrated against a reference ionization chamber. In conclusion, the microDiamond detector was proved capable of performing an accurate dosimetric characterization of proton pencil beams.

References

May 8, 1998·Medical Physics·S N BoonE Grusell
Apr 24, 2004·Zeitschrift für medizinische Physik·Eros PedroniGoran Kotle
Mar 22, 2013·Physics in Medicine and Biology·C GomàJ Sempau
Jun 7, 2013·Physics in Medicine and Biology·Liyong LinJames E McDonough
Sep 7, 2013·Medical Physics·Margherita ZaniGianluca Verona-Rinati
Sep 12, 2014·Physics in Medicine and Biology·Anna RalstonNatalka Suchowerska

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Citations

Jun 13, 2017·Physics in Medicine and Biology·Cyril MoignierAlejandro Mazal
Dec 28, 2019·Medical Physics·Vaiva KaveckyteÅsa Carlsson Tedgren
Jun 12, 2020·Physical and Engineering Sciences in Medicine·Georgia FriendPaul Charles
Apr 30, 2017·Physics in Medicine and Biology·Carles GomàSándor Vörös
Aug 9, 2016·Physics in Medicine and Biology·F MarsolatA Mazal
Jul 30, 2020·Physics in Medicine and Biology·Nolan EsplenMagdalena Bazalova-Carter
May 21, 2021·Physics in Medicine and Biology·Vaiva KaveckyteJosé M Fernández-Varea

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