3T related problems regarding presurgical mapping of eloquent brain areas
L Scheef, G Neuloh, T Brockmöller, K Hönig, CK Kuhl, H Urbach, H Schild · RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren · 2004 · Heft 03
Bibliografische Angaben
Zusammenfassung
Purpose: fMRI profits in several ways from an increasing field strengths. The BOLD-to-noise ratio as well as the detected cluster sizes are almost doubled when moving from 1.5T to 3T. The detection of higher cognitive functions becomes easier due to an increase in sensitivity. The signal gain can also be used to compensate the signal losses accompanied with parallel imaging techniques as SENSE, when high spatial resolution and / or time resolution are strived for. However when it comes to the clinical applications high field fMRI might also have some downsides: Increased susceptibility artefacts and image distor…
