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Experimental feasibility studies on a SPECT tomograph for BNCT dosimetry
D M Minsky1, A A Valda, A J Kreiner
1Dpto de Física, CNEA, Av. Gral Paz 1499 (B1650KNA), San Martín, Buenos Aires, Argentina. minsky@tandar.cnea.gov.ar
Researchers developed a SPECT tomograph prototype for real-time dosimetry in Boron Neutron Capture Therapy (BNCT). This system utilizes LaBr(3)(Ce) detectors and was tested at the University of Birmingham's BNCT facility.
Area of Science:
- Medical Physics
- Nuclear Medicine
- Radiological Imaging
Background:
- Boron Neutron Capture Therapy (BNCT) requires precise real-time dosimetry for effective treatment.
- Existing dosimetry methods may lack the spatial resolution or real-time capabilities needed for advanced BNCT applications.
- Scintillation detectors offer potential for high-resolution gamma-ray detection relevant to BNCT dosimetry.
Purpose of the Study:
- To develop and evaluate a prototype Single Photon Emission Computed Tomography (SPECT) tomograph system.
- To enable online dosimetry during Boron Neutron Capture Therapy (BNCT) using LaBr(3)(Ce) scintillation detectors.
- To optimize the system's shielding for integration into an accelerator-based BNCT facility.
Main Methods:
- Design and construction of a SPECT tomograph prototype utilizing LaBr(3)(Ce) scintillation detectors.
- Optimization of radiation shielding for the tomograph within an accelerator-based BNCT facility.
- Image reconstruction of a Californium-241 (Am-241) point source to assess system performance.
- Measurement of a phantom containing boron-10 ((10)B) at a concentration of 400 microg/g in simulated tumors at the BNCT facility.
Main Results:
- A functional prototype SPECT tomograph system for BNCT dosimetry was successfully designed and built.
- The system's shielding was optimized for the specific requirements of the University of Birmingham's BNCT facility.
- Successful reconstruction of an Am-241 point source image demonstrated the system's imaging capability.
- A projection measurement was acquired from a phantom simulating tumors with (10)B concentration, validating its use in a BNCT environment.
Conclusions:
- The developed SPECT tomograph prototype shows promise for online dosimetry in BNCT.
- The use of LaBr(3)(Ce) detectors and optimized shielding is suitable for BNCT applications.
- Further validation and characterization are needed to fully implement this system for clinical BNCT dosimetry.
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