Figure 9.

Axial T2 SPAIR (spectral adiabatic inversion recovery) images of 3 separate injuries involving the distal musculotendinous T junction of the biceps femoris over a 5-week period. The initial injury (A) was a grade 1 strain of both the long (L) and short (S) head components. There is a small amount of muscle fiber disruption at the myotendinous interface of the short head component but the T junction tendon structure was intact throughout. The first recurrent injury (B) was an isolated grade 1 strain of the short head component. A small focus of developing scarring is present at the epicenter of the strain (arrow). The long head component (L) is normal. The second recurrent injury (C) was a grade 2 tear of the short head component, where there is a small longitudinal split/delamination evident (arrow). The long head component (L) is normal.