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Related Experiment Video

Updated: May 27, 2026

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
06:28

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

Published on: January 30, 2020

Development of a high-resolution Si-PM-based gamma camera system.

Seiichi Yamamoto1, Hiroshi Watabe, Yasukazu Kanai

  • 1Kobe City College of Technology, Kobe, Japan. s-yama@kobe-kosen.ac.jp

Physics in Medicine and Biology
|November 15, 2011
PubMed
Summary
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We developed a compact, ultra-high-resolution gamma camera using silicon photomultipliers (Si-PMs) and YSO scintillators for small animal imaging. This novel system demonstrates promising performance for molecular imaging research.

Area of Science:

  • Medical Imaging
  • Nuclear Medicine
  • Detector Physics

Background:

  • Silicon photomultipliers (Si-PMs) offer advantages for PET and gamma cameras, including high gain, small size, and magnetic field insensitivity.
  • Traditional gamma cameras face limitations that newer detector technologies aim to overcome for improved resolution and sensitivity.

Purpose of the Study:

  • To develop and evaluate an ultra-high-resolution, compact gamma camera system for small animal imaging.
  • To assess the performance of a system utilizing Yttrium Orthosilicate (YSO) scintillators coupled with Si-PM detectors.

Main Methods:

  • Constructed a gamma camera using a 17x17 matrix of 0.6 mm x 0.6 mm x 6 mm YSO pixels optically coupled to a Si-PM array.
  • Integrated a parallel hole collimator (0.5 mm hole, 0.7 mm separation) and a gamma shield for imaging.

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Published on: February 1, 2016

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Last Updated: May 27, 2026

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
06:28

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

Published on: January 30, 2020

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space
14:19

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space

Published on: February 1, 2016

  • Utilized Cobalt-57 (Co-57) gamma photons (122 keV) for performance characterization.

    • Main Results:

    • Achieved near-complete resolution of the two-dimensional distribution for Co-57 gamma photons.
    • Obtained an energy resolution of 24.4% FWHM and a spatial resolution of 1.25 mm FWHM at 1.5 mm from the collimator.
    • Successfully acquired phantom and small animal images, demonstrating the system's imaging capability.

    Conclusions:

    • A Si-PM-based gamma camera system is a viable and promising technology for molecular imaging research.
    • The developed system offers ultra-high resolution and compactness suitable for preclinical applications.
    • Further development could enhance Si-PM gamma cameras for advanced nuclear imaging applications.