Single-center Comparative Study of Variation in Acetabular Anteversion According to Pelvic Tilt in Patients With Femoro-acetabular Impingement and Healthy Volunteers.

Inclusion criteria for symptomatic patients: * Patient at least 18 years of age but \< 50 years of age * Patient with a confirmed diagnosis of DWI for whom arthroscopic impingement surgery is proposed * Patient who has given and signed free and informed consent * A patient who is a member of a social security plan or a beneficiary of such a plan Healthy volunteer inclusion criteria: * Person at least 18 years of age but \< 50 years of age * Person with no existing DWI diagnosis * Person who has given and signed free and informed consent * Person affiliated with a social security plan or beneficiary of such a plan Exclusion Criteria: * Patient who has already undergone surgery on the same hip * Patient with previous spine surgery * Patient already included in the study for the opposite hip * Pregnant or breastfeeding patient * Patient who did not give consent * Patient for whom it is impossible to give informed information * Mentally impaired or any other reason that may interfere with understanding * Patient under court protection, guardianship or curatorship * Patient in an exclusion period as determined by another study