Elektra Beckum NM20600A-A, MCE manual Predicting MEG waveforms

Page 20

Predicting MEG waveforms

MCE User’s Guide

9 Predicting MEG waveforms

Figure 7 Predicted fields shown with XPlotter. The original measurement is shown with yellow lines and the waveforms predicted with the activity of the selected ROI is shown with red lines.

To find out, what part of the measured data is explained with the activity in the selected ROI, you can press the [Show predicted fields]command in the [Options] menu of the Amplitude window (p. 31). The program calculates the magnetic field produced by the currents in the selected ROI and shows them with the XPlotter program together with the original data loaded from the fif-file. If you select a new ROI, the waveforms are updated when you select the [Show pre- dicted fields]button again.

16

2004-05-17

NM20600A-A

Image 20
Contents MCE User’s Guide Copyright and Warranty Contents Index Introduction Hazard InformationVersion What’s new?Conventions and typography ReferencesQuitting the program Getting StartedAnalyzing data Setting the filtering and baselines Selecting the data file and pre-processingDecreasing the computing time and file sizes Effect of the baselinesBad channels and projections MCE User’s Guide Selecting the head model BEM selectionPoint set selection Point set selection dialogCreating BEM files Min distCalculating the estimates Loading a calculated estimate Selecting the time Region of interest What is ROI?What is the orientation of a ROI? Exporting ROIs Selecting a ROIROI database Predicting MEG waveforms Saving to an image file PrintingPrinting from the dialog Saving with xgifdump command Creating Html documents and Mpeg movies Creating Html documentsCreating movies MCE windows and dialogs Window menusMain window Options menuPre-processing dialog Minimum norm estimate options dialogPre-processing dialog Units Hz MEG data dialog Remove meanFull calculation dialog Select fileBatch jobs window CalculationColor display Color display of the estimateArrow display Arrow display of the estimateAmplitude window Amplitude window with total activityAmplitude scale window Amplitude scale windowColor scale window Constant color modeRelative color mode Things to remember Region of interest windowROI database window ROI databaseROI search ROI listSQL database Current ROIOther controls Html Creation Dialog Html Creation DialogMovie Creation Dialog Time periodsWindow length Index MCE User’s Guide