ABSTRACT
This research proposes integrating AC-coupled Low Gain Avalanche Diode (AC-LGAD) sensors into Time-of-Flight Positron Emission Tomography (TOF-PET) systems to achieve sub-50 ps timing resolution, significantly improving PET imaging sensitivity and enabling 4D tracking capabilities.
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Key findings
AC-LGAD sensors offer high temporal and spatial resolution, enabling 4D tracking.
Proposed AC-LGAD-based TOF-PET detectors could achieve CTR of 30-40 ps.
Advancement could reduce scan times, radiation doses, and improve small lesion detection.
Limitations & open questions
Challenges include radiation hardness, gain layer optimization, and scalable readout architectures.