PET-CT Phantom

For acceptance testing of PET/CT and SPECT/CT systems

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The PET-CT Phantom™ includes internal structures (three rods and six spheres) which, when imaged with both modalities, can demonstrate how accurately the two image sets are aligned.

In addition, a single sample of radioactive water is attenuated by water, bone and CT contrast material (as well as air only) to determine how accurately the CT-based PET attenuation correction works.

The Phantom is used for:

  • Acceptance testing of PET/CT and SPECT/CT systems

  • Routine quality evaluation of PET/CT and SPECT/CT systems

  • Evaluation of new image fusion software

  • Evaluation of new attenuation correction algorithms

  • Aluminum tubes are for registration

  • The outer 2" OD micro cylinder is for comparing attenuation region to non attenuation region

  • The 6" ring is for contrast solution

  • Research


  • Main Cylinder:

    • Interior length of phantom: 180 mm

    • Fillable spheres (5) inner diameter: 10 mm, 13 mm,

    • 17 mm, 22 mm, and 28 mm.

  • Distance from sphere plane to inside wall: 70 mm

  • Volume of empty cylinder: 9.7 liters

  • Main Cylindrical insert dimension:

    • Outside diameter: 51 mm

    • Length: 180 mm

  • Top Cylinder:

    • Cylinder outside diameter: ~5.1 cm

    • Cylinder inside diameter: ~4. cm

    • Cylinder inside height: ~8.2 cm

    • Cylinder outside height: ~12.0 cm

    • Volume of empty cylinder: 408 cm2

  • Three Aluminum Tubes:

    • One 5 inch long: ~1.7 cc

    • Two 7 inch (ea): ~ 2.5 cc

  • Stepped Bone Ring:

    • Pre-filled with liquid bone composition, not to be opened

      The volumes for the bone ring are:

      • Outer volume: 15.6 cu inch: ~256 cc

      • Inner volume: 6.7 cu inch: ~110 cc

Item Number

043-771 Phantom, PET-CT