简介：Thesphericalheadmodelhasbeenwidelyusedinmagnetoencephalography(MEG)asasimpleforwardmodelforcalculatingtheexternalmagneticfieldproducingbyneuralcurrentsinahumanbrain.Butthismodelmayleadtoaninaccurateresult,evenifthecomputationspeedisfast.Formoreprecisecomputation,realisticbrain-shapedheadmodelisusedwiththeboundaryelementmethod(BME),butatgreatlyincreasedcomputationalcost.WhensolvingMEGinverseproblembyusingoptimizationmethods,theforwardproblemmustoftenbesolvedforthousandsofpossiblesourceconfigurations.Soifthebrain-shapedheadmodelisusedinalliterativestepsofoptimization,itmaybecomputationallyinfeasibleforpracticalapplication.Inthispaper,wepresentamethodaboutusingcompoundheadmodelinMEGinversesolution.Inthismethod,firstsphericalheadmodelisusedforaroughestimation,thenbrain-shapedheadmodelisadoptedformoreprecisesolution.Numericalsimulationindicatesthatundertheconditionofsameaccuracy,thecomputationspeedforthepresentmethodisaboutthreetimesfasterthanamethodusingthebrain-shapedheadmodelatalliterations.