Persistent Falcine Sinus in an Adult: Demonstration by MR Venography

A, Coronal acquisition 2D time-of-flight MR venographic sagittal projected image. B, Coronal acquisition 2D time-of-flight MR venographic oblique projected image. The persistent falcine sinus is visible (arrow), as is the atretic straight sinus. Note the lack of flow within the thrombosed left distal transverse and sigmoid sinus.