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1、GroupICAoffMRIToolbox(GIFT)WalkThrough1213SrinivasRachakonda,EricEgolf,VinceCalhounMarch29,2011IntroductionThiswalkthroughisgoingtobringyouthroughGroupICAanalysisoffunctionalMRI(fMRI)data([1]).Foradetailedexplanationofthetoolbox,pleaseseethemanual.Thefunctionaldataforthreesubjectsislocatedinthe‘exa
2、mple_subjects.zip’file.MoreinformationonthetaskthesubjectperformedwhileinthescannerisgivenintheAppendixA.TheAppendixsectionalsocontainsinformationondefaultsusedintheGIFTtoolboxandotherinformation.Pleasereportsuggestionsorcommentstovcalhoun@unm.eduorsrachakonda@mrn.org.Forquickinformationonaparticul
3、artopicclicktheHelpbutton(Figure1),thisopensHTMLhelpmanualinthedefaultwebbrowser.GIFT-HelpmenuplottedonmainfigurewindowsopenstheHTMLpageforthattopicinthewebbrowser.Eachexamplesubjectalsocontainsafunctionaldataset,whichcontainsonlyonebrainslice.Ifyouarehavingproblemswiththistoolboxyoumaytestthiswith
4、asmallerdataset.InstallingGIFTUnzipthefile‘GroupICATv2.0d.zip’toyourlocalmachineandaddGIFTdirectoriestotheMATLABsearchpathorrunthe‘gift.m’filetoautomaticallyaddGIFTdirectories.AftertheGIFTpathisset,GIFTtoolbox(Figure1)opensinanewfigurewindow.ThereisalsoanoptiontorungroupICAusingabatchscript(Seemanu
5、al).Batchscriptisveryusefulforrunninglargedatasets.InstallingExampleSubjectsDownloadthe‘example_subjects.zip’fileandunzipintoanappropriatedirectory.Includedinthisfilearethreesubject’spreprocessedfMRIdatafromavisuomotortask(AppendixA).Wholebrainandsingleslicedata(forrapidtesting)areprovided.1TheMIND
6、ResearchNetwork,Albuquerque,NM2OlinNeuropsychiatryResearchCenter,Hartford,CT3Dept.ofElectricalandComputerEngineering,UniversityofNewMexico,Albuquerque,NMFigure1:GroupICAoffMRIToolboxStepsinvolvedinGIFTTheGIFTmainlyconsistsofanalysisfunctionsandvisualizationoptions.Thisdocumenttakesthereaderstep-by-
7、stepfirstthroughtheanalysisandthenontothevisualizationpartsofGIFT.I.AnalysisFunctions:1.SetupICAAnalysisinvolvesenteringparametersforthegroupICAanalysis.Thefollowingarethestepsinvolvedinthisprocess:a.)Wheny
