• The used traction technique was well tolerated by most patients. • The used traction technique almost consistently achieved separation of cartilage layers. • Traction MR arthrography enabled accurate detection of chondral and labral lesions.

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Due to a transcription error, reference 7 was mistakenly not unblinded after the review process. We would like to clarify that reference 7 should read as follows: 7. Schmaranzer F, Klauser A, Kogler M et al. (2014) Improving visualization of the central compartment of the hip with direct MR arthrography under axial leg traction: a feasibility study. Acad Radiol 21:1240-1247 We apologise for this multifactorial error.