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Spine Anatomy & Glossary A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z partial discectomy - Removal of a small portion of the disc, frequently the portion which is ruptured. Paramagnetic Contrast: Material for MR imaging, also known as Gadolinium or Gad. It is used to distinguish between a disc protrusion and scarring. Pedicle- the portion of the vertebrae which connects the lamina to the vertebral body. Frequent site of screw placement plate - Flat metal object usually made of titanium with holes for screws to be used in the front of the spine. PLIF - posterior lumbar interbody fusion. A posterior anatomical description which refers to the back of an object.