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Correlation of Diffusion in Lumbar Intervertebral Disks with Occlusion of Lumbar Arteries: A Study in Adult Volunteers¹

¹ From the Departments of Diagnostic Radiology (M.K., L.K., J.J., O.T.) and Physical Medicine and Rehabilitation (J.K.), Oulu University Hospital, Kajaanintie 50, 90220 Oulu, Finland; and Oulu Polytechnic, Institute of Technology, Oulu, Finland (J.J.). Received December 8, 2000; revision requested January 18, 2001; revision received April 17; accepted May 15. Address correspondence to M.K. (e-mail: mauno.kurunlahti@oulu.fi).

View larger version (81K): [in a new window]   Figure 1. MR scout image (8.7/1.9; FOV, 36 x 36; section thickness, 3 mm; matrix, 256 x 128) shows diffusion weighting. Only L2-3 and L3-4 disks were parallel to the imaging plane and were acceptable.

View larger version (109K): [in a new window]   Figure 2. MR angiograms (2D TOF; 29/5; FOV, 24 x 18; section thickness, 1.5 mm; matrix, 256 x 512) and DSA image in 48-year-old volunteer. (A) Right and (B) left side maximum intensity projection MR angiograms. (C) Coronal MR angiogram. (D) DSA image. A-D show stenosis (narrowed lumbar arteries) in right L2 (open arrow in A, C, and D), right L4 (thick arrow in A, C, and D), and left L3 (thin arrow in B, C, and D) lumbar arteries.

View larger version (114K): [in a new window]   Figure 3. MR angiograms (2D TOF; 29/5; FOV, 24 x 18; section thickness, 1.5 mm; matrix, 256 x 512) and DSA image in 60-year-old volunteer. (A) Anteroposterior, (B) right oblique, and (C) right and (D) left side maximum intensity projection images show stenosis in left L4 lumbar artery. (E) Coronal MR angiogram and (F) DSA image show both L4 arteries are normal. A-F show stenosis (absent lumbar arteries) in both L3 arteries (arrows).

View larger version (106K): [in a new window]   Figure 4. Grading of different levels of disk degeneration on T2-weighted MR image (6,000/105; FOV, 30 x 30; section thickness, 4 mm; matrix, 512 x 224). L1-2, L2-3, and L3-4 disks were graded 0; L3-4 disk with slightly blurred intranuclear cleft (thin arrow); L4-5 disk with decreased signal intensity was graded 1 (curved arrow); and L5-S1 disk with decreased signal intensity and height loss was graded 2 (thick arrow).

View larger version (108K): [in a new window]   Figure 5. ROI measurements of ADC. The ROI is measured in a disk with high signal intensity on T2-weighted MR image (5,000/72.6; FOV, 40 x 20; section thickness, 5 mm; matrix, 128 x 128).