DDH

In our experiment, we collect hip US images of 781 infants aged 0-6 months. Each patient contains one or two images of the left and right legs, for 1355 images. The images include 568 infants with type I hips without dislocation and 213 infants with type II hips. Markers include seven segmental structures and six landmarks. All images are taken from two machines in Beijing Haidian District Maternal and Child Health Hospital, model Philips CX50 L12-3 linear array probe (machine 1) and GE Voluson E8 9L linear array probe (machine 2). All images are collected by two associate chief clinicians and three attending clinicians. Each image is reviewed by a clinician with more than seven years of experience in hip ultrasound to ensure that it meets the requisite clinical standards. One of three attending clinician, with year of experience, manually labels all images, and all labels are subsequently reviewed and checked by a team of senior clinicians.