FIG 6. Comparison of coronal MIPs from 2D TOF MRV in the axial (A) and coronal planes (B).

A, Focal area of diminished signal intensity in the left transverse sinus (arrow). Internal jugular veins are well depicted.

B, Diminished signal intensity in the medial thirds of both transverse sinuses (arrows), while the lateral aspect of the left transverse sinus is well depicted. Loss of signal intensity in the IJVs is due to in-plane flow. Lack of a caudal presaturation pulse accounts for visualization of arterial structures.