Fig. 2From: Comparison of the preoperative diagnostic accuracy of BIPSS versus MRI for Cushing disease: a single-centre experienceVenography of inferior petrosal sinuses. a Puncture of the right femoral vein using the Seldinger technique. b Well-positioned catheters within the inferior petrosal sinuses (black arrows). c Right inferior petrosal sinus venography during contrast medium injection. The black arrows indicate the inferior petrosal sinus draining directly into the right internal jugular veinBack to article page