Current Status of Cherenkov-Based Gamma Detectors for TOF-PET and Proton Range Verification.

Area of Science:

• Medical Physics
• Detector Instrumentation
• Nuclear Imaging

Background:

• Time-of-flight positron emission tomography (TOF-PET) and proton range verification (PRV) in proton therapy both rely on gamma photon detection.
• Cherenkov light emission has emerged as a significant gamma-detection signature for these modalities over the past decade.
• Gamma detectors are crucial components in the imaging systems associated with TOF-PET and PRV.

Purpose of the Study:

• To review the use of Cherenkov light for gamma detection in TOF-PET and PRV from a detector instrumentation viewpoint.
• To summarize the challenges and barriers hindering the commercial adoption of Cherenkov-based gamma detection approaches.
• To consolidate research efforts and inspire future work in this specialized field.

Main Methods:

• Review of experimental efforts in Cherenkov light detection for gamma sensing.
• Categorization of detector characterization based on signal types: simultaneous Cherenkov and scintillation light, pure Cherenkov emitters, and semiconductor detectors with simultaneous Cherenkov emission.
• Analysis of the physics of Cherenkov emission, propagation, and detection.

Main Results:

• Extensive research has been conducted over the last decade on utilizing Cherenkov light for gamma detection in TOF-PET and PRV.
• Various detector configurations employing Cherenkov emission have been investigated.
• Significant barriers to commercial adoption have been identified, requiring further research and development.

Conclusions:

• Cherenkov light detection presents a viable pathway for advancing gamma detection in TOF-PET and PRV.
• Overcoming identified challenges is essential for the successful commercial implementation of these technologies.
• Continued research and community collaboration are vital for future progress in Cherenkov-based detector instrumentation.