TOF-MRA (first column), FSBB (second column), and an intraoperative photomicrograph (third column) of 4 different patients with various degrees of atherosclerosis.

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Presentation transcript:

TOF-MRA (first column), FSBB (second column), and an intraoperative photomicrograph (third column) of 4 different patients with various degrees of atherosclerosis in the aneurysm wall. TOF-MRA (first column), FSBB (second column), and an intraoperative photomicrograph (third column) of 4 different patients with various degrees of atherosclerosis in the aneurysm wall. A, Left ICA–anterior choroidal artery unruptured aneurysm from case 1. TOF-MRA depicts the aneurysm (A-1, arrow) and left carotid artery (A-1, asterisk). FSBB shows high signal intensity in most of aneurysm wall with ROIs (green circle) in the wall (A-2, arrow) and at the center of the ipsilateral ICA for measuring the referring intensity (A-2, arrowhead). Intraoperative view showing abundant atherosclerotic plaques (grade A) in the aneurysm wall (A-3, arrow). B, Left MCA aneurysm from case 8. TOF-MRA shows the aneurysm (B-1, arrow). FSBB depicts focal high signal intensity in the aneurysm wall (B-2, arrow), corresponding to a patchy atherosclerotic plaque (grade B) in the intraoperative view (B-3, arrow). C, Right MCA aneurysm from case 3. TOF-MRA demonstrates the aneurysm (C-1, arrow). FSBB shows no high signal intensity in the wall (C-2, arrow), and the intraoperative view also shows no plaques (grade C) in the wall (C-3, arrow). D, Left AcomA aneurysm from case 10. TOF-MRA depicts the aneurysm (D-1, arrow), and FSBB shows no high signal intensity in the aneurysm wall (D-2, arrow). The operative view shows a small patchy atherosclerotic change on the right body of the aneurysm (D-3, arrow). T. Matsushige et al. AJNR Am J Neuroradiol 2015;36:1507-1511 ©2015 by American Society of Neuroradiology