Corrigendum to “OARSI Clinical Trials Recommendations: Knee imaging in clinical trials in osteoarthritis” [Osteoarthritis Cartilage (2015) 698–715]

Abstract

On page 699 the published text conflates the fixed flexion and MTP techniques so that neither are correct. The published text states: "The most commonly used techniques used at this time are the fixed-flexion PA view and the fluoroscopically aligned Lyon-Schuss PA view, with the use of a SynaFlexer positioning frame (BioClinica (formerly Synarc), San Francisco, CA). In the Lyon Schuss view, the patellae and thighs are in contact with the film cassette and coplanar with the tips of the great toes. In the (MTP) fixed flexion view the patellae are in contact with the cassette and aligned vertically with the first MTP joints with the feet externally rotated 5. This results in reproducible flexion of the knee at approximately 20. The X-ray beam is angulated 10 caudad and centered on a reproducibly identifiable point in the popliteal fossa of a single knee or midway between the two knees at the level of the popliteal fossa if both knees are imaged simultaneously, with the aim of aligning the beam tangential with the floor of the medial tibial plateau. The Lyon Schuss technique uses the same positioning and beam centering, but fluoroscopically aligns the anterior and posterior rims of the medial tibial plateau.The published text should read: "The most commonly used techniques used at this time are the fixed-flexion PA view and the fluoroscopically aligned Lyon-Schuss PA view, with the use of a SynaFlexer positioning frame (BioClinica (formerly Synarc), San Francisco, CA). In the fixed-flexion view, the patellae DOI of original article: http://dx.