Accuracy evaluation of x-ray joint space width in the hip joints is determined by the correct positioning of the patient, turn the limbs and centration of X-rays during radiography. The position of the patient standing gap width articular significantly lower than in the supine position.
Knee-joint - one of the most difficult joints for proper radiographic examination because of their structural complexity and the wide range of movements. Osteoarthritis can be localized only in a certain section of the joint, which is also difficult to diagnose articular changes in osteoarthritis of the knee (gonarthrosis).
Although MRI is the leading method for the detection of coxarthrosis, ultrasound has the advantage of detecting a small effusion in the hip (even less than 1 ml), as well as disturbances in the condition of the periarticular soft tissues in the early stages of osteoarthrosis.