Article Figures & Data
Figures
- Fig 1.
A, Regions of interest for CBV measurements: 1) lateral basal ganglia; 2) frontal subcortical white matter; 3) occipital subcortical white matter; 4) thalamus; 5) corona radiata; 6) internal capsule, posterior limb. B, Bland-Altman plot displays slightly higher FD-CBV values (0.04 mL/100 mL) in comparison with CTP. C, Mean CBV values and SDs of the 6 regions of interest show only minimal deviations.
- Fig 2.
CT (A) and FD-CT (B) show the good correlation of CBV color maps. CTA (C) and FD-CTA (D) display a high-grade stenosis (black arrows) of the left MCA (patient 4). Note the perfect delineation of this high-grade stenosis in FD-CTA.
- Fig 3.
A, At initial scanning, the brain appears without any signs of stroke. B, FD-CT performed 24 hours later cannot visualize the stroke region. C, MR imaging also performed 24 hours later confirms infarct demarcation (arrows). D−F, MIP reconstruction of the CTA (D) and FD-CTA (E) corresponds perfectly with the DSA finding (F) of stenosis (arrow) in the distal M1 as well as the proximal M2 segments. Notice the sharp delineation of the vessels in FD-CTA in contrast to that in CTA.
- Fig 4.
A and B, Comparison of CTP-CBV (A) with FD-CBV (B) demonstrates decrease of CBV in the region of the internal capsule, anterior limb. C, The region matches nicely with the MR image (Fig 3C).
Tables
Summary of clinical and imaging characteristics
No. Age (yr) Vascular Pathology Symptoms Treatment CBV Lesion FD-CT CBV CTP-CBV Evans Index Stenosis Grade (%) Interval, CT to FD-CT (hr) FD-CT MSCT FD-CT MSCT DSA 1 81 VA stenosis, right TIA Medical 0.27 0.28 67 66 72 20.5 2 70 Extracranial ICA stenosis TIA Carotid stenting 0.26 0.25 17.75 3 76 MCA occlusion, left Minor stroke Medical Internal capsule, anterior limb 2.6 mL/100 mL 2.7 mL/100 mL 0.31 0.32 18 4 61 MCA stenosis, left TIA Stent 0.42 0.43 94 92 95 16.5 5 61 VA stenosis, left TIA Medical 0.37 0.36 82 78 80 18.5 6 69 VA stenosis, right TIA Medical 0.3 0.31 88 85 84 13.5 7 50 MCA stenosis, right Minor stroke Stent Internal capsule, nterior limb 2.1 mL/100 mL 1.8 mL/100 mL 0.25 0.26 80 81 76 13.75 8 52 MCA occlusion, right Minor stroke Medical Temporal lobe 1.6 mL/100 mL Not visible 0.21 0.22 16.25 9 67 MCA aneurysm TIA Medical 0.28 0.27 14.5 10 67 Carotid aneurysm TIA Medical 0.24 0.25 21.5
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