Article Figures & Data
Figures
- FIG 1.
Representative case 1. A patient presented with a left M1 segment occlusion. A, FPD CBV imaging includes FPD CBV images and FPD CT angiographic images. B, The axial FPD CT angiographic images could visualize the occlusion site (M1 proximal, white continuous arrow) and its distal vessel (M1 distal, white dashed arrow) by the filling of collaterals. The visualization score is 1. C, MRA could visualize the occlusion site but not its distal vessel (visualization score = 5). D, White arrowheads in the FPD CT angiographic image show the filling of the MCA territory via leptomeningeal anastomosis. The collateral score is 3 for 100% collateral supply of the occluded MCA territory. E, The filling of the MCA territories is not confirmed on the MRA. MIP thickness is set to 10 mm for B and C and 5 mm for D and E.
- FIG 2.
Representative case 2. A patient presented with tandem occlusions (cICA and M2 segment proximal occlusions). A, The left intracranial ICA is not visualized on MRA, suggesting left cICA occlusion. White arrowheads show slightly depicted M1 segment probably via the anterior communicating artery. Left M2 occlusion could not be identified on MRA. B, FPD CBV imaging before percutaneous transluminal angioplasty followed by conventional angiography at the left common carotid artery identifies left cICA occlusion (black arrowhead). C, The occlusion site (M2 proximal, white continuous arrow) and its distal vessel (M2 distal, white dashed arrows) on the coronal image by the fillings of collaterals. The visualization score is 1. MIP thickness is set to 20 mm.
Tables
Characteristics Patient background Age (yr) 74.9 [SD, 13.1] Atrial fibrillation 16 (72.7%) Hypertension 13 (59.1%) Diabetes mellitus 2 (9.1%) Dyslipidemia 12 (54.5%) Chronic kidney disease 11 (50%) Clinical status and treatment NIHSS at arrival 13.9 [SD, 5.9] Sedation (midazolam) 6 (27.3%) IV rtPA therapy 8 (40.9%) TICI Grade 2a 1 (4.5%) Grade 2b 5 (22.7%) Grade 3 16 (72.7%) Puncture-to-recanalization time (min) 66.2 [SD, 25.2] Total contrast dose (mL) 130.3 [SD, 39.4] mRS pre-onset 0.6 [SD, 1.2] 90-day post-MT 2.7 [SD, 1.9] ↵a Data are presented as mean [SD] or No. (%).
Patient No. Occlusion Site Image Quality Collateral Score Visualization Score FPD CT MRA 1 ICA-T Excellent 1 3 3 2 ICA-T Excellent 3 2 5 3 ICA-T Poor – – – 4 ICA-T Excellent 1 3 5 5 ICA-T Excellent 1 2 – 6 ICA-T Fair – – 5 7 ICA-T Excellent 0 5 5 8 M1 proximal Excellent 3 1 5 9 M1 proximal Excellent 2 1 5 10 M1 proximal Excellent 2 1 5 11 M1 proximal Excellent 2 1 4 12 M1 distal Excellent 3 1 5 13 M1 distal Good 2 1 3 14 M2 proximal Excellent 3 1 4 15 M2 proximal Good 1 1 2 16 M2 proximal Excellent 2 1 5 17 M2 proximal Excellent 2 1 5 18 M2 proximal Excellent 2 1 5 19 M2 proximal Good 2 1 5 20 M2 distal Excellent 3 1 5 21 cICA, M2 proximal Good 3 1 5 22 cICA, M2 proximal Good 1 2 5 Note:— – indicates unevaluable.
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