Use case: Recording

When a technician performs an EEG recording, from time to time, the technician changes the visualization filter settings and montage, in order to check the quality of the source signals and/or to better visualize a potential abnormal signal pattern in the live neurophysiology recording. Based on this information, during the live recording, the technician may adjust the physical parameters of the recording, such as manually adjusting the surface electrode contact with the skin to improve the signal quality. If abnormalities occur or if external circumstances change that could be of importance for the evaluation of the recording, the technician may add an annotation at a particular time point. The Annotations added by the technician during the recording may either be stored in this Waveform Acquisition Presentation State object or in a separate Waveform Annotation SR object.

Use case: Quality Control

A neurophysiology technician makes a recording which is of suboptimal quality. The lead technician of the lab reviews the recording with the technician who made the recording using the Waveform Acquisition Presentation State object. They discuss the poor signal quality of certain sources not noticed during the recording. This led to certain physical parameters not being adjusted during the recording, which would have rectified the problem. The reason for that was that the technician used suboptimal filter and/or montage settings. Such suboptimal filter and montage settings can include filter settings with notch filter on which can hide line noise (which can indicate poor impedance) or a montage that does not include relevant sources.