Elektra Beckum MCE, NM20600A-A manual Introduction, Hazard Information

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MCE User’s Guide

Introduction

1 Introduction

This manual describes the use of MCE program to analyze magnetoencephalo- graphic (MEG) measurements using L1 minimum norm estimates1,2 (L1 MNE).

1.1 Hazard Information

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This manual contains important hazard information which must be read, under- stood and observed by all users, For your convenience all warnings that appear in the manual are presented below.

Warning: Like all inverse solutions of MEG, MCE provides a source distribution which is one of infinitely many different possible ones. The results must be interpreted and reviewed by a person having good understanding of the capabilities and limitations of the methods being used.

Warning: This program should only be used with hardware and software given in the specifications listed in the Release Notes of the release being used.

Warning: On some platforms other programs can affect the colors in the windows of the MCE program. In such cases other programs using colored windows should be stopped to ensure correct colors on the displays.

Warning: The triangle meshes used in MCE to describe the shape of the brain must be defined in head coordinates. This differs from the recommended coordinate system usage in dipole modeling program.

Warning: If the regularization parameters are changed from the default ones, the new values must be validated using known data.

Warning: Region of interest may contain multiple sources whose activities are mixed together.

Warning: All users that have access to the database can also access the data- base entries related to the data of other users.

NM20600A-A

2004-05-17

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Contents MCE User’s Guide Copyright and Warranty Contents Index Hazard Information IntroductionWhat’s new? VersionConventions and typography ReferencesQuitting the program Getting StartedAnalyzing data Selecting the data file and pre-processing Setting the filtering and baselinesEffect of the baselines Decreasing the computing time and file sizesBad channels and projections MCE User’s Guide BEM selection Selecting the head modelPoint set selection dialog Point set selectionMin dist Creating BEM filesCalculating 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 Creating Html documents and Mpeg moviesCreating movies Window menus MCE windows and dialogsOptions menu Main windowMinimum norm estimate options dialog Pre-processing dialogPre-processing dialog Units Hz Remove mean MEG data dialogSelect file Full calculation dialogCalculation Batch jobs windowColor display of the estimate Color displayArrow display of the estimate Arrow displayAmplitude window with total activity Amplitude windowAmplitude scale window Amplitude scale windowColor scale window Constant color modeRelative color mode Region of interest window Things to rememberROI database ROI database windowROI list ROI searchSQL database Current ROIOther controls Html Creation Dialog Html Creation DialogTime periods Movie Creation DialogWindow length Index MCE User’s Guide