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. 2016 May 10;89(1063):20160138. doi: 10.1259/bjr.20160138

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© 2016 The Authors. Published by the British Institute of Radiology

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Figure 6. — Fluorine-18 fludeoxyglucose (¹⁸F-FDG) uptake patterns in psoriatic arthritis dactylitis; co-registered sagittal sections from (a) CT, (b) positron emission tomography (PET) and (c) PET/CT. The light blue arrows show tenosynovitis at the proximal interphalangeal (PIP) joint, also manifested as a flexor tendon distention on the CT image [maximum standardized uptake value (SUV_max) = 2.35]. Green and brown arrows show elevated ¹⁸F-FDG uptake at the extensor tendon enthesis at the distal phalange (SUV_max = 1.53) and the nail bed (SUV_max = 1.64), respectively, consistent with enthesitis and nail bed inflammation of this digit reported in the physical examination. For colour image see online.