同时，由水、骨及其CT对比度材料（及其空气）制成的衰减放射水样本可以判断CT基础上的PET衰减是否正常。

该模体应用于：

PET/CT and SPECT/CT 质量验收控制。

日常工作的 PET/CT 及其 SPECT/CT校验。

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.

Specifications:

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