Transcranial doppler sonography is not a valid diagnostic tool for detection of basilar artery stenosis or in-stent restenosis: a retrospective diagnostic study

by Woori Koh, Kai Kallenberg, André Karch, Tobias Frank, Michael Knauth, Mathias Bähr, Jan Liman
Published 2017-05-01

Breath holding for 20 s following extended expiration is a practical, effective and robust standard when measuring cerebrovascular reactivity in healthy adults using BOLD fMRI at 3...

by Jörg Larsen, Kai Kallenberg, Johanna Rühlmann, Jürgen Baudewig, Eike A. Nickel, Michael Knauth, Peter Dechent
Published 2021-06-01