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Technique classification.
| Techniques | Principal | Secondary | ||
|---|---|---|---|---|
| Invasive | noninvasive | Anatomical | Physiological | |
| Discography | ✓ | ✓ | ||
| Myelography | ✓ | ✓ | ||
| SPECT | ✓ | ✓ | ||
| CT Scan | ✓ | ✓ | ||
| SPECT and CT | ✓ | ✓ | ✓ | |
| Plain Radiography | ✓ | ✓ | ||
| MRI | ✓ | ✓ | ||
| Cineradiography | ✓ | ✓ | ||
| Upright and Kinematic MRI | ✓ | ✓ | ||
