Gamma Probe Tank

This practical intraoperative gamma probe test phantom may be used to reproducibly perform commissioning baseline measurements and ongoing quality control testing.

The test phantom comprises of:

  • A tank to enable the performance tests to be performed both in a scatter medium and in air;
  • Two radioactive source holder rigs that allow the straightforward completion of angular and spatial resolution measurements. The source holder rigs have adapters to hold either sealed or unsealed radioactive sources. The unsealed radioactive source option comprises a small fillable sphere, typically to be used with Tc-99m or other clinically appropriate isotopes.¬† Optionally, the sealed source holder can be deployed which securely holds radioactive pen sources including Co-57 pens; and
  • A gamma probe holder with inserts allowing for different probe end dimensions to accommodate testing of probes both with and without collimators on.

The phantom enables straightforward performance of the following tests as detailed in NEMA NU 3-2004 using sealed and unsealed sources:

  • Sensitivity in air;
  • Sensitivity in a scatter medium;
  • Spatial resolution in a scatter medium;
  • Volume sensitivity to distributed activity in a scatter;
  • Short-term sensitivity stability;
  • Sensitivity to scatter;
  • Count rate capability in a scatter medium; and
  • Angular resolution in a scatter medium.


  • Outer dimensions of main tank body: 360mm x 360mm x 210mm
  • Liquid source holder volume: 0.2mL
  • Axial source to probe tip displacements available: 10mm, 30mm, 50mm
  • Designed to accommodate radioactive pen sources with dimensions: <10mm diameter
  • Angular resolution rig and spatial resolution rig included with clear marking on the main tank body to indicate angular and lateral spatial displacements between probe tip and radioactive source.
  • Gamma probe/collimator tips tube adapters for tips ends from 8-20mm diameterVariable designs with different FOV sizes are available upon request.

Comes with:

  • Detailed user manual

Complies with:

  • NEMA NU 3-2004
  • IPEM Report 85 (2022):Radioactive Sample Counting: Principles and Practice published by the Institute of Physics and Engineering in Medicine

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