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. 2022 Feb 20;26(4):757–764. doi: 10.1007/s40477-022-00667-2

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Fig. 4 — High resolution linear transducer. a Coronar plane: Intense hyperechoic pial demarcation. Reversal of white and gray matter echogenicity: white matter with markedly increased echogenicity (*) and a very homogeneous fine texture interrupted by small cysts (arrows); Corpus callosum remains hypoechoic (large arrow); Cortical gray matter presents as a large ribbon with low echogenicity (arrowhead). b White matter cysts are zoomed (arrow). c Coronar scan in a normal age-matched infant: Fine hyperechogenic cortical ribbon (arrowhead) and hypoechogenic white matter (small arrow). Parasagittal plane in Canavan disease (d) and equivalent normal ultrasound example (e) in an age-matched infant with benign enlargement of subarachnoidal spaces (BESS)