Table 2.

LV characteristics of HIE + MRI, HIE-MRI and non-HIE neonates

	Patients scanned with the eL18-4 transducer (n = 59)
	HIE + MRI(n = 12)	HIE-MRI(n = 15)	Non-HIE(n = 32)	p- value
Number of stems, mean (SD)	2.4 (0.9)	2.7 (1.2)	2.8 (0.9)	0.523
Number of branches, mean (SD)	1.0 (0.9)	3.0 (2.8)	3.3 (1.9)	0.005*
Width				0.67
Imperceptible (n, % in category)	0 (0%)	1 (6.7%)	0 (0%)
Less than pia (n, % in category)	10 (83.3%)	12 (80%)	24 (75%)
Equal or greater than pia (n, % in category)	2 (16.7%)	3 (20%)	9 (33.3%)
Echogenicity				0.67
Imperceptible (n, % in category)	0 (0%)	1 (6.7%)	0 (0%)
Less than pia (n, % in category)	10 (83.3%)	11 (73.3%)	23 (72%)
Equal or greater than pia (n, % in category)	2 (16.7%)	3 (20%)	9 (28.1%)
Normalized Length, mean (SD)	0.36 (0.08)	0.40 (0.07)	0.39 (0.06)	0.327
Tortuosity, mean (SD)	1.06 (0.02)	1.07 (0.03)	1.08 (0.04)	0.499
Transducer settings
Frequency, MHz, mean (SD)	27.5 (2.5)	25.9 (2)	26.5 (4.5)	0.155
Mechanical index, mean (SD)	0.5 (0.1)	0.6 (0.1)	0.5 (0.1)	0.707
Thermal index, mean (SD)	0.4 (0.2)	0.4 (0.2)	0.5 (0.2)	0.070
Dynamic range, mean (SD)	73.2 (5.4)	73.1 (3.8)	70.3 (6)	0.155
Frequency band, n (% in category)				0.563
Gen	12 (100%)	12 (80%)	29 (90.6%)
Pen	0 (0%)	2 (13.3%)	2 (6.3%)
Res	0 (0%)	1 (6.7%)	1 (3.1%)
Harmonic, n (% in category)	12 (100%)	15 (100%)	31 (96.9%)	0.651

HIE, hypoxic–ischemic encephalopathy; LV, lenticulostriate vessels.

LV characteristics of HIE+MRI, HIE-MRI and non-HIE neonates who were scanned with the Phillips eL18-4 transducer. *statistical significance.