专长领域功能性磁振造影（fmri）课件

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1、SomeTerminologiesx:inputfeaturesEg.x=[weight,height,waistline,chestcircumference,age],x=[Brainvolumeindifferentregions(region1,region2….regionn)]Dimensionality:numberoffeaturesinxEg.x=[weight,height,age]Thedimensionis3f(x,θ)xyy:output,itcanbeacontinuousvalueoradiscretevalue(classes).Eg.continuouse

2、values:y=[age(12)],Eg,classes:y=[‘male’],y=[‘female’]F(x,θ):TheModelwhichestimatestheoutputyformthegiveninputxfeatureswithmodelparametersθ.Examplesofsimplemodelf(x,θ)GaussianModel2parameters(meanandstandarddeviation)LinearModel2parameters(gradientandoffset)x1(feature1)X2(feature2)Twosetsofdatax1(f

3、eature1)X2(feature2)Class1Class2x1(feature1)X2(feature2)GaussianModelClass1Class2x1(feature1)X2(feature2)Class1Class2LinearDiscriminativefunctionx1(feature1)X2(feature2)Buttherearemanypossibleseparatinglinesx1(feature1)X2(feature2)MaximizingthemarginγSupportVectorMachineSeparatinglinex1(feature1)X

4、2(feature2)MaximizingthemarginγSupportVectorMachineSupporvectorSupporvectorsSeparatinglineFunctionalImagingLaboratory(FIL)12QueenSquare,St.John’sHouseAbout60ResearchersaroundtheglobeDifferentGroupsMRPhysicsAnalysisMethods(whereIbelongto)LanguageEmotion.Etc…PrimarySupervisorDr.JohnAshburner職稱Honora

5、rySeniorLecturer單位TheWellcomeDepartmentofImagingNeuroscience專長領域功能性磁振造影（fMRI）、神經解剖運算模型(computationalNeuroamatomy)Quotedfrom第一屆台灣地區認知神經科學暑期學校Ashburner博士目前任職於英國的FIL，是在腦訊號處理方法學及物理學方面的主要研究員，主要專長是計算神經解剖學。由於我們由腦造影工具所獲得的影像需要倚賴一套適當的運算模型，來調整個別受試者的腦部不同形狀大小以獲得具代表性的空間訊號，才能作進一步的訊號比較，而FIL能夠在腦訊號處理科學界不但是開路先驅更於現在位

6、居龍頭，Ashburner博士所奠定的基礎功不可沒。SecondarySupervisor:ProfessorKarlFristonPosition:DirectorofFunctionalImagingLaboratoryFoundersofSPMsoftwarepackageFellowoftheRoyalSocietyQuotedfromTheRoyalSocietyProfessorFristonisProfessorofNeuroscienceandDirectoroftheFunctionalImagingLaboratoryatUniversityCollegeLondon.

7、Hepioneeredanddevelopedthesinglemostpowerfultechniqueforanalysingtheresultsofbrainimagingstudies,andindeterminingtherelationshipsofdifferentcorticalareastooneanother.二○○三年搞笑諾貝爾獎（IgNobel）醫學獎得主Navigation-relatedstr