Ultrasound system image of deep fascia of TFL. (1) The area where the ultrasound was shaded by the aluminum tape, (2) the intersection of the shaded area of the aluminum tape and the deep fascia of the TFL, (3) the angle between the deep fascia and a muscle fascicle, (4) the subcutaneous tissue, (5) the TFL, and (6) the vastus lateralis muscle. The left side of the photograph shows the proximal lower extremity, and the right side shows the distal lower extremity.