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Figure 12c.   Postfusion degenerative disease imaged with CT myelography (1.0-mm section thickness). (a) Sagittal reformation image shows excellent bone detail and the outline of the subarachnoid space. (b, c) Corrected-axis MPR image (b), which was obtained along the dashed line in a, has the same spatial resolution as an original axial image (c), which was obtained along the black line in a.