ology 245. 43-61 (2007). 40. Hueftle. M. G. at 8A Lumbar spine: postoperative MR imaging with Gd.DTPA. Radiology 167. 817-824 (1988). 41. Ross.). S. et al MR imaging of the postoperative 'unbar spine: assessment with gadopentetate dimeglumine. Am. l Roentgenol 155.867-872 (1990). 42. linkins. J. R. Gd-