Article Figures & Data
Figures
- Fig 1.
The distribution of WVCR in each plaque in the aneurysm wall. There is a significant difference in WVCR among A, B, and C (P = .0011). Group A indicates major plaques; group B, minor plaques; and group C, no plaques.
- Fig 2.
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).
Tables
Patient demographics and findings
Case No. Aneurysm No. Patients Aneurysms Aneurysm Wall Findings at HOP-MRA Atherosclerotic Risk Factors Sex Age (yr) Location Maximum Size (mm) Intraoperative Plaque Findingsa High Signal Intensity WVCRb HT DL DM CS 1 1 M 24 ICA Ach 4.2 A + 0.73 + − − − 2 2 M 35 ACA (A1) 2.8 C − −0.02 + − − + 3 3 M 69 MCA 6.1 C − −0.22 − + − + 4 4 M 76 MCA 14.1 A + 0.70 + − − + 5 5 F 71 ICA PcomA 5.9 C − 0.01 − + − + 6 F 71 ICA terminal 3.5 NAc + 0.64 − + − + 6 7 F 53 dACA 7.2 A + 0.68 + + − + 8 F 53 dACA 6.7 B + 0.62 + + − + 9 F 53 AcomA 4.2 C − 0.02 + + + + 7 10 F 63 MCA 5.4 B + 0.04 + + − − 8 11 F 70 MCA 5.1 B + 0.44 − + − − 9 12 M 60 AcomA 4.7 C − 0.00 + − − − 10 13 F 63 AcomA 5.0 B − 0.02 + + − − 11 14 M 61 MCA 7.2 B + 0.60 + − − + 12 15 F 73 MCA 9.6 A + 0.75 − − − − 13 16 F 55 AcomA 4.0 C − 0.04 + − − + 14 17 F 69 AcomA 5.6 C − 0.03 − + − − Note:—Ach indicates anterior choroidal artery; PcomA, posterior communicating artery; ACA (A1), anterior cerebral artery (A1 segment); dACA, distal anterior cerebral artery; HT, hypertension; DL, dyslipidemia; DM, diabetes mellitus; CS, cigarette smoking; NA, not assessed due to anatomic reasons; +, present; −, absent.
↵a Intraoperative plaque assessment in the aneurysm was demonstrated as the following: grade A, major plaques; grade B, minor plaques; grade C, no plaques.
↵b WVCR indicates a high-intensity area in the aneurysm wall to the background low-intensity area inside the aneurysm.
↵c Impossible to characterize the entire aneurysm due to anatomic reasons.
