Transverse
Radiograph Localizer
1-
Cranial L6
2- Middle L6
3- Caudal L6
4-
L6-7 Disc
5- Caudal L7
6- L7-S1
Sagittal
Radiograph
Localizer
1-
R Sacroiliac Joint
2- R IV Foramina
3- R Lateral Recess
4- Central Canal Discs
5- L IV Foramina
6- L Sacroiliac Joint
Dorsal
Radiograph Localizer
1-
Articular Process Joints
2- Lamina
3- Mid Canal
4- Discs: Nucleus Pulposus
1. Thecal sac: Synonym dural sac. Soft tissue opacity CT structure that is enclosed by the dura mater. Tissues inside the thecal sac include the arachnoid membrane, fluid-filled subarachnoid space, nerve roots, and spinal cord. Individual soft tissues inside of the thecal sac are silhouetted in plain CT images and cannot be discriminated. <Back