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. 2018 Aug 7;9:645. doi: 10.3389/fneur.2018.00645

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Copyright © 2018 Richter, Woitalla, Muhlack, Gold, Tönges and Krogias.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Corresponding mesencephalic axial examination planes. The butterfly-shaped midbrain is outlined for better visualization. The asterisk indicates the aqueduct. Arrowheads indicate the brain stem raphe. (A) Raphe structure not visible, grade 0, pathologic finding. (B) Echogenic line of the raphe is interrupted, grade 1, pathologic finding. Long arrows indicating the hyperechogenic enlarged area of Substania nigra (C) Normal echogenicity, grade 2, normal finding.