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Published on: November 13, 2012
Fiber-optic Cerenkov radiation sensor for proton therapy dosimetry
Kyoung Won Jang1, Wook Jae Yoo, Sang Hun Shin
1Department of Biomedical Engineering, Research Institute of Biomedical Engineering, Konkuk University, Chungju 380-701, South Korea.
Optics Express
|June 21, 2012
Summary
This study introduces a novel fiber-optic Cerenkov radiation sensor for proton therapy dosimetry. It accurately measures proton beams without scintillator quenching effects, offering a simpler alternative to traditional methods.
Area of Science:
- Medical Physics
- Radiation Detection
Background:
- Traditional fiber-optic radiation sensors in proton therapy face complex corrections due to scintillator quenching.
- This limitation impacts the accuracy of dosimetry measurements.
Purpose of the Study:
- To develop an innovative fiber-optic sensor for proton therapy dosimetry.
- To utilize Cerenkov radiation generated in plastic optical fibers, bypassing scintillator quenching effects.
Main Methods:
- Fabricated a fiber-optic Cerenkov radiation sensor without an organic scintillator.
- Measured Cerenkov radiation induced by therapeutic proton beams.
- Compared sensor readings with an ionization chamber and a traditional fiber-optic sensor.
Main Results:
- Successfully measured Bragg peaks and spread-out Bragg peaks of proton beams.
- Obtained results without scintillator-induced quenching effects.
- Demonstrated good agreement between the Cerenkov sensor and the ionization chamber.
- Measured Cerenkov radiation as a function of proton beam dose rate.
Conclusions:
- The fiber-optic Cerenkov radiation sensor provides accurate proton beam dosimetry without quenching effects.
- This method offers a promising alternative for simplifying dosimetry in proton therapy.
