1. Efficacy and safety of viscosupplementation by ultrasound-guided intra-articular injection in osteoarthritis of the hip 
A Migliore, L.S.M Martin, A Alimonti, C Valente, S Tormenta 
Osteoarthritis and Cartilage 
Volume 11, Issue 4, Pages (April 2003)
DOI: /S (03)

2. Fig. 1
The ultrasound probe with biopsy guide is placed in a parasagittal plane over the hip. The needle is inserted antero-superiorly into the joint.
Osteoarthritis and Cartilage  , DOI: ( /S (03) )

3. Fig. 2
Longitudinal ultrasonographic scan of the hip joint. The anterior surfaces of the acetabulum along with the head and the neck of the femoral bone are noted. The capsule is depicted asthe anterior hyperechoic layer following the profile of the femoral bone. The needle is indicated by the arrows.
Osteoarthritis and Cartilage  , DOI: ( /S (03) )