Pseudo-CT and Corresponding PET Attenuation Values Used for Different Tissue Classes After MR Image Segmentation
| Tissue class | Air | Lungs | Fat | Fat–nonfat soft tissue | Nonfat soft tissue |
| Assigned CT value (HU) | −1,000 | −750 | −108 | −29 | 50 |
| Linear attenuation value (cm−1) | 0 | 0.024 | 0.086 | 0.093 | 0.101 |