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Table 1 Description of qualitative MRI parameters assessed by the central readers (absent/present)

From: Achilles tendon enthesitis evaluated by MRI assessments in patients with axial spondyloarthritis and psoriatic arthritis: a report of the methodology of the ACHILLES trial

Parameter Name

Parameter Description

Tendinitis

Tendinitis in the Achilles tendon and/or plantar aponeurosis

Tendinitis: insertional area

Tendinitis in the area of Achilles tendon insertion and/or hyperintense signal in the plantar aponeurosis at the site of insertion at the calcaneus

Bursitis

Bursitis in the area of the Achilles tendon and/or plantar aponeurosis

Bone oedema

BME in the insertion of the Achilles tendon in the upper part of the calcaneus and/or in the insertion of the plantar aponeurosis in the lower part of the calcaneus

Periarticular inflammation

Periarticular inflammation of the ankle joint

Bone erosion

Bone erosion in the calcaneus

  1. MRI Magnetic resonance imaging