PET-CT Phantom

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
• Aluminium 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