Related Experiment Video
Updated: Dec 8, 2025
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
19.3K
Fabrication and characterization of a stemless plastic scintillation detector
Michael A Hupman1, Thalat Monajemi1,2,3, Irina Valitova1
1Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada.
Medical Physics
|September 23, 2020
Summary
This study demonstrates a novel stemless plastic scintillation detector (SPSD) for radiation dosimetry. The SPSD shows excellent linearity and reproducibility, making it suitable for clinical measurements in radiotherapy.
Area of Science:
- Medical Physics
- Radiation Detection
- Radiotherapy Physics
Background:
- Accurate radiation dosimetry is crucial for effective radiotherapy.
- Plastic scintillators offer potential for real-time dose monitoring.
- Developing novel detectors with improved characteristics is an ongoing research area.
Purpose of the Study:
- To fabricate and characterize a stemless plastic scintillation detector (SPSD).
- To evaluate the SPSD's linearity, reproducibility, and energy/dose per pulse dependence.
- To assess the SPSD's applicability in clinical photon depth dose (PDD) and output factor measurements.
Main Methods:
- Fabrication of organic bulk heterojunction photodiodes and integration with various plastic scintillators.
- Measurement of energy dependence using different photon beam energies (100-300 kVp, 6-10 MV).
- Assessment of linearity, dose per pulse dependence, output factors, and PDDs, with comparisons to ion chamber measurements.
Main Results:
- Excellent linearity (r²=1) and high sensitivity were observed for fabricated SPSDs.
- No significant dose per pulse dependence was detected.
- Output factors agreed within 1% with ion chamber measurements after applying a correction for Compton current, especially for smaller scintillators.
Conclusions:
- The stemless plastic scintillation detector (SPSD) principle is successfully demonstrated.
- The SPSD exhibits excellent linearity, reproducibility, and minimal dose per pulse dependence.
- The SPSD shows comparable energy dependence to existing scintillator detectors used in radiotherapy.
