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A multiplexing method based on multidimensional readout method.

Xin Yu1,2, Han Liu2, Huiping Zhao2

  • 1School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China.

Physics in Medicine and Biology
|January 24, 2025
PubMed
Summary
This summary is machine-generated.

A new multidimensional readout method for PET detectors reduces readout channels without sacrificing spatial or energy performance. This innovation simplifies PET systems, lowering costs and power consumption for better imaging.

Keywords:
SiPM readoutmulti-dimensional readoutmultiplexing method

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Area of Science:

  • Medical Imaging
  • Detector Physics

Background:

  • Positron Emission Tomography (PET) systems require sophisticated readout electronics.
  • Reducing the number of readout channels (NRC) is crucial for simplifying PET detector design and reducing costs.

Purpose of the Study:

  • To develop and validate a novel multidimensional readout method for PET detectors.
  • To significantly reduce NRC while maintaining high spatial and energy resolution.

Main Methods:

  • Utilized a 3x3x4 Silicon Photomultiplier (SiPM) array with multi-dimensional arrangement.
  • Employed row/column/layer summation with a resistor-based splitting circuit.
  • Applied denoising methods for accurate crystal-position determination and evaluated energy response at 511 keV.

Main Results:

  • Achieved a high multiplexing ratio, significantly lowering NRC.
  • Maintained excellent energy resolution at 511 keV, comparable to conventional systems.
  • Identified an optimal SiPM bias voltage of 31 V for balancing gain and saturation.

Conclusions:

  • The multidimensional readout method offers a practical, cost-effective alternative to traditional PET readout schemes.
  • The system demonstrates adaptability for multi-layer hits and scatter correction.
  • The architecture is scalable for broader applications in SPECT, CT, and LiDAR.