Musculoskeletal Radiology

The X Ray of the skull as shown in the image given below is seen in:

The appearance of USG at saphenofemoral junction, showing common femoral vein, common femoral artery and the great saphenous vein is called as:

A 15 year old patient with history of spinal tuberculosis was brought to the hospital with low grade fever, dull backache and persistent flexion of hip joint Hip joint motion was limited and painful. Identify the muscle affected in the CT image. La d

Which is the earliest imaging modality used to detect ankylosing spondylitis?