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Table 2: MR imaging and cranial ultrasound data and findings at presentation
No. Percentage
Imaging data 
 MR imaging and US 7 
 MR imaging only 8 
 US only 1 
Age at imaging (range) (day) 
 MR imaging 3.2 (1–9) 
 US 2.7 (1–7) 
MR imaging field strength (1.5T:3T) 12:3 
MR imaging sequences 
 Core sequences^{^a} 15/15 
 GRE T2*WI 11/15 
 SWI 4/15 
MRV performed 
 On initial MRI 10/15 
 On repeat MRI within 4 days 3/15 
MRA performed 
 On initial MRI 9/15 
 On repeat MRI within 6 weeks 3/15 
Lesion laterality (right:left) 10:6 62%:38%
Lesion location 
 Temporal 11/16 69%
 Frontal 3/16 19%
 Parietal 1/16 6%
 Occipital 1/16 6%
Parenchymal diffusion restriction 15/15 100%
Parenchymal hemorrhage 11/15 50%
Intraventricular hemorrhage 3/15 18%
Midline shift 8/15 50%
Yin-yang sign on MRI 15/15 100%
Yin-yang sign on US 6/6 100%
Note:—US indicates ultrasound.
↵a The core MR images include sagittal and axial T1WI, axial and coronal FSE T2WI, and axial and coronal DWI.