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6CCVD Research

Diamond energy-dispersive dosimeter for measuring linear energy deposition distributions in clinical carbon beam therapy

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2024-06-25
JournalNuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms
AuthorsT. Matsumoto, Katsumi Aoki, Hideyuki Takei, Takahiro Makino, Shunsuke Yonai
InstitutionsCIVIDEC Instrumentation (Austria), Tohoku University

Abstract

Section titled ā€œAbstractā€

A thin diamond membrane energy-dispersive dosimeter 50 Ī¼m thick was fabricated for estimating clinical dose distribution. In contrast to conventional semiconductors, diamond wide-bandgap semiconductors are expected to have excellent radiation tolerance and biological compatibility based on the linear relationship of stopping power ratio for clinical carbon particles. Linear energy transfer (LET) spectra were obtained along with the Bragg curve for a clinical carbon beam generated at Gunma University Heavy Ion Medical Center. The relative biological effectiveness (RBE) distributions were estimated from the LET spectra for both the mono-energy and spread-out Bragg peak irradiation configurations. The diamond detector was also used as a solid ionization chamber to obtain the radiation-induced current (RIC) distribution, which represents the physical dose distribution. The clinical dose distribution was estimated from the RIC and RBE distributions as proof of concept for the clinical carbon beam therapy field with a single-chip diamond energy-dispersive dosimeter.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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