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Abstract

MR imaging of the postoperative lumbar spine: assessment with gadopentetate dimeglumine.

J S Ross, T J Masaryk, M Schrader, A Gentili, H Bohlman and M T Modic
American Journal of Neuroradiology July 1990, 11 (4) 771-776;
J S Ross
Department of Radiology, University Hospitals of Cleveland/Case Western Reserve University School of Medicine, OH 44106.
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T J Masaryk
Department of Radiology, University Hospitals of Cleveland/Case Western Reserve University School of Medicine, OH 44106.
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M Schrader
Department of Radiology, University Hospitals of Cleveland/Case Western Reserve University School of Medicine, OH 44106.
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A Gentili
Department of Radiology, University Hospitals of Cleveland/Case Western Reserve University School of Medicine, OH 44106.
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H Bohlman
Department of Radiology, University Hospitals of Cleveland/Case Western Reserve University School of Medicine, OH 44106.
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M T Modic
Department of Radiology, University Hospitals of Cleveland/Case Western Reserve University School of Medicine, OH 44106.
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Abstract

This study defines the accuracy of gadopentetate-dimeglumine-enhanced MR imaging in patients with failed back surgery syndrome by comparing the imaging studies with surgical findings in a large patient population. From June 1988 to March 1989, 193 postoperative patients had MR imaging of the lumbar spine both with and without contrast administration. Of this group, 27 had repeat surgery at 31 levels: these patients comprise the study group. Postcontrast MR diagnoses were as follows: scar only (n = 4), disk only (n = 13), scar and disk (n = 9), and no aberrant epidural tissue (n = 5). Surgical diagnoses differed from the MR diagnoses in two patients at two levels. In one patient, disk was diagnosed on MR while osteophyte was present at surgery. In the other patient, scar only was diagnosed by MR but disk and scar were present at surgery. These data, when combined with the authors' previous experience, give pre- and postcontrast MR a 96% accuracy in differentiating scar from disk in 44 patients at 50 reoperated levels. For patients 6 or more weeks past surgery, sagittal and axial T1-weighted MR imaging before and after administration of gadopentetate dimeglumine is an effective method of evaluating the postoperative lumbar spine.

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American Journal of Neuroradiology
Vol. 11, Issue 4
1 Jul 1990
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MR imaging of the postoperative lumbar spine: assessment with gadopentetate dimeglumine.
J S Ross, T J Masaryk, M Schrader, A Gentili, H Bohlman, M T Modic
American Journal of Neuroradiology Jul 1990, 11 (4) 771-776;

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MR imaging of the postoperative lumbar spine: assessment with gadopentetate dimeglumine.
J S Ross, T J Masaryk, M Schrader, A Gentili, H Bohlman, M T Modic
American Journal of Neuroradiology Jul 1990, 11 (4) 771-776;
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