Article Figures & Data
Figures
- FIG 1.
Representative DWI with a b-value of 1000 s/mm2 (A), IVIM D (B), f (C), and D* (D) maps obtained using a 2-step algorithm. A 90-year-old woman with AIS. IVIM f and D* are expressed in units of percentage and ×10−3 mm2/s, respectively. Interobserver agreement is shown for IVIM f (κ = 0.854; P < .001) and D* (κ = 0.789; P < .001) using the 2-step algorithm, which indicated almost perfect and substantial agreement, respectively.
- FIG 2.
A DWI with a b-value of 1000 s/mm2 (A), IVIM D (B), f (C), D* (D) maps, and MRA (E) of a 73-year-old man with AIS. MR imaging was performed 7 days after symptom onset. Nondecreased IVIM f and D* are identified on the f and D* maps. MR angiography represents spontaneous recanalization of the occluded left distal MCA (E; arrows). MRA performed 33 hours after symptom onset (F) is also shown as a reference.
- FIG 3.
Plots of Dmean (A), fmean (B), and D*mean (C) on both the affected and contralateral unaffected sides. The Dmean and fmean values were lower on the affected side (mean Dmean = 0.45 [SD, 0.09] × 10−3 mm2/s; mean fmean = 3.22% [SD, 2.93%]) than on the contralateral unaffected side (mean Dmean = 0.76 [SD, 0.11] × 10−3 mm2/s, P < .0001; mean fmean = 5.55% [SD, 2.16%], P = .0010). No statistical difference in mean D*mean was evident between the affected side (22.6 [SD, 7.24] × 10−3 mm2/s) and the contralateral unaffected side (24.3 [SD, 4.94] × 10−3 mm2/s; P = .24).
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