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Fig. 1 | Arthritis Research & Therapy

Fig. 1

From: Proteoglycan loss in the articular cartilage is associated with severity of joint inflammation in psoriatic arthritis—a compositional magnetic resonance imaging study

Fig. 1

Right hand of a 26-year-old male with psoriatic arthritis (PsA; disease duration 39 months). Coronal STIR image (a) of digits 1–5, transversal fat-saturated (fs) T2-weighted image of digits 2–4 (b), and the corresponding transversal fs contrast-enhanced T1-weighted image (c) at the distal portion of the proximal phalanges. The horizontal white bar in a indicates the level of transversal slices (b, c). Sagittal fs proton density-weighted image of the third digit (d). a Increased signal at the collateral ligaments and synovitis of the proximal interphalangeal (PIP) joint of the third digit (white arrow). Periarticular inflammation around the PIP joint and the body of the proximal phalanx of the third digit (arrowhead). b, c Extensive flexor tenosynovitis (asterisk) and periarticular inflammation in the subcutaneous tissues (arrowhead) alongside thickened flexor tendon pulleys (arrow). d, e Representative sagittal T1-weighted images of the MCP, PIP, and DIP joints of the 3rd digit. Following iv contrast administration and appropriate delay of 40 min, a gives the morphological T1 map, while b gives the corresponding parameter map with dGEMRIC values [ms] overlaid. Note the significant decrease in dGEMRIC indices of the PIP joint as compared to the MCP joint. Also, decreased dGEMRIC indices of the volar aspect of the DIP joint

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