Effects of Various Head Movement Executions on Spatial Accuracy of Magnetoencephalography Systems

• DOI: 10.1109/sensors56945.2023.10324962
• Publication Date: 2023-11-28T19:02:53Z
• Authors: Mevlüt Yalaz; Markus Butz; Günther Deuschl; Patrick Boe; Ann-Kristin Helmers; Alfons Schnitzler; Michael Höft
• Keywords: Magnetoencephalography

Head movements during magnetoencephalography (MEG) recordings lead to a smearing of the magnetic field distribution measured by MEG sensors and thus significant degradation spatial accuracy. This in turn is associated with inaccurate source localization. movement detection was applied performed under condition different degrees head (moderate, weak, quasi-no) compared individually constructed head-cast recordings. The center moved on average around 4.8 mm for moderate motion 3.5 weak motion. Even without execution, 1.4 average, which could be significantly minimized less than 0.2 using an individual head-cast. In addition, it found that repositioning within scanner realized mean deviation sensor positions 1 use head-cast, while this 4.7 Our work suggests head-casts allows maximization precision systems ensures comparability separately recorded sessions.