Introduction

Femoroacetabular impingement (FAI) is a mechanical hip disorder caused by an abnormal bony contact between the femur and acetabulum. Open MRIs can enable studies of FAI under weightbearing, but the resolution of such scans is comparatively low, so it is useful to obtain high resolution (HR) reference scans from a conventional MRI and register lower resolution (LR) open MRI images to the HR images. The purpose of this study was to establish the degree of correspondence between the segmented volumes from the two types of scanner and to estimate the repeatability of joint angle measurements.