Figure 2From: High bone turnover assessed by 18F-fluoride PET/CT in the spine and sacroiliac joints of patients with ankylosing spondylitis: comparison with inflammatory lesions detected by whole body MRI Fifty-five-year-old female patient (patient number 4). Patient with fluid within the left facet joint S1 (arrow) on MRI and corresponding increased activity on F PET/CT (arrowhead) indicating activated degenerative facet joint osteoarthritis. Left parasagittal STIR (a), fused PET/CT (b), CT (c), and PET (d) images.Back to article page