Maximum-intensity projection reconstructions in varying obliquities of 3D time-of-flight MRA of the neck. (A) Patient 1 demonstrates a flame-shaped origin to the ICA (arrow) that is completely occluded without any distal flow. (B) Patient 6 demonstrates a flame-shaped narrowing (arrow) to the origin of the right ICA that is of a much-reduced caliber (string sign) distally (arrow). (C) Patient 7 demonstrates a much-reduced caliber ICA (arrow) from its origin, the so-called “string” sign. (D) Patient 9 demonstrates a focal stenosis at the origin of the ICA (arrow) with reduced caliber distal to the stenosis. (E) Patient 10 demonstrates a short focal stenosis (arrow) well above the origin of the ICA that is otherwise of normal caliber. (F) Line drawing of unrotated cMRA illustrating the normal anatomy of arterial vessels in the neck and indicating the sites of stenosis and occlusion in patients 1-10 (shaded). eca indicates external carotid artery; cca, common carotid artery; and vert, vertebral artery.