Fig. 2

Relationship between internal caliber and outer diameter in the arteriopathy at the left internal carotid artery (ICA) C1-2 segment (arrow). (A) Magnetic resonance angiography (MRA) on admission, showing slight luminal stenosis. (B) MRA at 29 days after onset, showing progression of luminal stenosis. (C) MRA at 12 months after onset, showing improvement of luminal stenosis. (D) 3D-SPACE on admission, showing slight arterial shrinkage at the stenotic lesion. (E) 3D-SPACE at 29 days after onset, showing worsened arterial shrinkage at the stenotic lesion. (F) 3D-SPACE at 12 months after onset, showing improvement of the arterial shrinkage of the outer diameter. The changes in the outer diameter on 3D-SPACE were almost the same as those in the internal caliber on MRA.