Related Experiment Video
Updated: Jun 28, 2025
10:48
Probing Nicotinic Acetylcholine Receptor Function in Mouse Brain Slices via Laser Flash Photolysis of Photoactivatable Nicotine
Published on: January 25, 2019
9.3K
DOI- and TOF-capable PET array detector using double-ended light readout and stripline-based row and column
Fei Wang1, Chien-Min Kao2, Xiaoyu Zhang3
1College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China.
IEEE Transactions on Radiation and Plasma Medical Sciences
|April 24, 2024
Summary
This study presents a novel, highly multiplexing readout for positron emission tomography (PET) detectors using silicon photomultipliers (SiPMs). The system achieves successful crystal discrimination and provides depth-of-interaction (DOI) information, crucial for advanced PET imaging.
Area of Science:
- Medical Physics
- Instrumentation
- Nuclear Medicine
Background:
- Positron Emission Tomography (PET) imaging requires detectors with high spatial and temporal resolution.
- Accurate depth-of-interaction (DOI) measurement is critical for improving PET image quality by correcting parallax errors.
- Current PET detector designs often involve complex readout electronics, limiting multiplexing capabilities.
Purpose of the Study:
- To develop and evaluate a highly multiplexing readout system for PET detectors capable of measuring DOI and time-of-flight (TOF).
- To assess the performance of detector modules with different crystal matrix sizes (4x4 and 8x8) using this novel readout.
- To identify factors affecting the coincidence resolving time (CRT) in larger detector modules.
Main Methods:
- A novel readout scheme using striplines (SL) for row and column discrimination of N×N silicon photomultiplier (SiPM) arrays was implemented.
- Detector modules (4x4 and 8x8) were constructed using lutetium-yttrium oxyorthosilicate crystals (3.0×3.0×20 mm³).
- Outputs were sampled and processed offline to evaluate energy resolution (ER), DOI resolution, and coincidence resolving time (CRT).
Main Results:
- Successful crystal discrimination was achieved for both 4x4 and 8x8 detector modules.
- The 4x4 module yielded an average ER of 14.1%, DOI resolution of 2.5 mm, and CRT of 495 ps.
- The 8x8 module showed an average ER of 16.4%, DOI resolution of 2.9 mm, and CRT of 641 ps, with intercrystal scattering identified as a cause for CRT degradation.
Conclusions:
- The developed highly multiplexing readout system effectively enables DOI and TOF measurements in PET detectors.
- Performance metrics, including energy and DOI resolution, are promising, though CRT degrades with increased detector module size.
- Further investigation into mitigating intercrystal scattering is recommended for optimizing TOF performance in larger PET detector arrays.
