DRLs for CT Used for Attenuation Correction and Localization in SPECT Scans in Terms of Volume CT Dose Index and Dose–Length Product and Effective Dose Associated with Hybrid CT of SPECT/CT
| SPECT/CT protocol | Volume CT dose index (mGy) | Dose–length product (mGy⋅cm) | Effective dose (mSv) |
|---|---|---|---|
| Brain | 5.6 | 163 | 2.44 |
| Head and neck | 4.5 | 181 | 2.74 |
| Lung | 2.1 | 69 | 1.03 |
| Cardiac | 1.2 | 32 | 0.48 |
| Abdomen | 1.7 | 65 | 0.98 |
| Bone, general | 2.7 | 166 | 2.49 |
| Bone, extremities | 2 | 169 | 2.53 |