Figure 2From: Size of cup affects the anterior capsular distance in total hip arthroplasty, as measured with ultrasound Sonographic measurement of the capsular distance in THA. AC - echo from the anterior surface of the anterior hip joint capsule. FN - echo from the anterior surface of the prosthetic femoral neck. FH – echo from the anterior surface of the prosthetic femoral head. d - represents the distance between anterior capsule and prosthetic femoral neck.Back to article page