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Design modifications to Rotating Modulation Collimators for extended field-of-view
1Department of Quantum and Nuclear Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul, South Korea.
Summary
This study introduces an enhanced Rotating Modulation Collimator (RMC) design for faster radiation source localization. The extended field-of-view (FOV) RMC allows wider area scanning, improving measurement efficiency.
Area of Science:
- Medical Physics
- Instrumentation
- Radiation Detection
Background:
- Rotating Modulation Collimators (RMC) are crucial for radiation source localization.
- Current RMC designs may have limitations in measurement speed due to restricted fields of view (FOV).
Purpose of the Study:
- To propose and evaluate a novel RMC design with an extended FOV.
- To enhance radiation source localization speed and efficiency.
Main Methods:
- Monte Carlo simulations were employed to model the RMC system response, system matrix, and modulation profiles.
- Image reconstruction was performed using the Maximum Likelihood Expectation Maximization (MLEM) algorithm.
Main Results:
- The proposed RMC design achieved an extended FOV up to 60° with a maximum localization error of 5°.
- An even wider FOV of up to 70° was demonstrated with a maximum error of 15°.
Conclusions:
- The extended FOV RMC design significantly improves measurement speed by widening the scanned area.
- This advancement offers a more efficient method for radiation source localization in various applications.
