Article Figures & Data
Figures
- Fig 1.
CBF in hemispheres and flow territories ipsilateral and contralateral to the occlusion side (A) and mean arterial arrival time and trailing edge time ipsilateral and contralateral to the occlusion side (B). Error bars represent corresponding SDs. Significant differences are indicated by an asterisk.
- Fig 2.
Axial brain maps showing arterial arrival and trailing edge time in a patient with right ICA occlusion. Delayed arterial arrival and increased trailing edge time can be observed in the right hemisphere.
- Fig 3.
MR imaging data of 2 patients with right ICA occlusion, illustrating 2 different patterns of collateral flow. A, MRA data show hypoplasia of both PcomAs. Flow maps obtained by selective ASL illustrate the compensatory flow from the remaining ICA via the AcomA. The flow territory of the remaining ICA (selective tagging of the ICA) is green, and the flow territory of the BA (selective tagging of the BA) is red. B, MRA data show a complete COW, resulting in mixed collateral flow via the AcomA and PcomA as illustrated by velocity data and flow maps.
- Fig 4.
Different collateral flow patterns through the circle of Willis and corresponding distribution of flow via the ACA, MCA, and PCA on the occlusion side. Flow has been displayed as a percentage of total flow in the cerebral arteries.
- Fig 5.
Timing parameters in the hemisphere on the occlusion side, depicted for each collateral flow type.
Tables
Patient characteristics, clinical, and angiographic results
No. Sex Age (yr) Clinical Onset Side Location ICA Occlusion FU COW (MRA) Symptoms Ischemic Lesions (T2WI FLAIR) 1 F 65 R CN III, V1, VI palsy R C4 Balloons 14 Hypoplastic PcomAs Improved Both hemispheres, unchanged 2 F 32 R CN III palsy R C4 Balloons 49 Complete Cured – 3 F 48 Headache nausea, SAH R C4 Balloons 74 Complete Cured Both hemispheres, unchanged 4 F 48 R decreased visual acuity R C4 Balloons 23 Absent contralateral PcomA Cured – 5 F 64 R ophthalmoplegia R C4 Coils + balloon 35 Absent contralateral PcomA Cured – 6 F 60 R CN III palsy R C4 Coils + balloon 20 Hypoplastic PcomAs Improved Both hemispheres, unchanged 7 F 50 L ophthalmoplegia L C4 Balloons 30 Hypoplastic contralateral PcomA Unchanged – 8 F 55 Headache, nausea, SAH R C5 Coils 22 Complete Cured Right hemisphere, increased 9 F 59 R CN VI palsy R C4 Balloons 58 Absent contralateral PcomA Improved Both hemispheres, unchanged 10 F 33 R CN VI palsy R C4 Balloons 78 Complete Cured – 11 F 41 R ophthalmoplegia R C4 Coils 22 Complete Improved Right hemisphere, unchanged -
Note:—FU indicates follow-up in months; Unchanged, unchanged compared with MR imaging at the time of diagnosis/directly postprocedure; R, right; L, left; COW, circle of Willis.
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