最新Computational methods for microwave medical imaging微波医学成像的计算方法-药学医学精品资料.ppt

最新Computational methods for microwave medical imaging微波医学成像的计算方法-药学医学精品资料.ppt

ID:62067164

大小:4.06 MB

页数:41页

时间:2021-04-14

最新Computational methods for microwave medical imaging微波医学成像的计算方法-药学医学精品资料.ppt_第1页
最新Computational methods for microwave medical imaging微波医学成像的计算方法-药学医学精品资料.ppt_第2页
最新Computational methods for microwave medical imaging微波医学成像的计算方法-药学医学精品资料.ppt_第3页
最新Computational methods for microwave medical imaging微波医学成像的计算方法-药学医学精品资料.ppt_第4页
最新Computational methods for microwave medical imaging微波医学成像的计算方法-药学医学精品资料.ppt_第5页
资源描述:

《最新Computational methods for microwave medical imaging微波医学成像的计算方法-药学医学精品资料.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库

1、最新Computationalmethodsformicrowavemedicalimaging微波医学成像的计算方法-药学医学精品资料OutlineOverviewForwardfieldmodelingaccuracyandefficiencyImplementationoftheFDTDmethod3DmicrowaveimagingSystemandresultsReconstructionefficiencyEstimationmodelTheadjointmethodandthenodaladjointapprox

2、imationSVDanalysisoftheJacobianmatrixPhasesingularityandphaseunwrappingScatteringnullsDynamicphaseunwrappinginimagereconstructionConclusions2004-12-222Qianqian'sPhDThesisDefenseCharacteristicsofDartmouthMicrowaveimagingsystemTomography,wide-bandoperatingfrequency,sm

3、alltarget,lossybackground,simpleantennaModelingnonlinearscatteredfield,nonlinear(iterative)parameterestimationAdvantageofaccessinginvivodata(smallanimal/patientbreastimaging),firstclinicalmicrowaveimagingsystemintheUS2004-12-223Qianqian'sPhDThesisDefenseFDTD(FiniteD

4、ifference-TimeDomain)methodinmicrowavetomographyConceptuallystraightforward,easytoprogramGoodabsorptionboundaryconditionMarching-On-Timefeature(MF,initialfield)LowercomputationalcomplexityEasytoparallelize2004-12-227Qianqian'sPhDThesisDefense2DFDTDdual-mesh2004-12-2

5、28Qianqian'sPhDThesisDefenseUsingFDTDforwardmodelinginaniterativereconstructionStartSetinitialguessEvaluateforwardsolutionComparepredictedfieldmeasuredfieldEvaluateJacobianSolveforparameterupdatesGoodenough?FEM:AssembleAAssemblebApplyBCSolveAx=bFDTD:Computeupdatecoe

6、ff.dot=1:timestepUpdateEUpdateHIfsteady-state?breakenddoamp&phaseextractionEndnoyes2004-12-229Qianqian'sPhDThesisDefenseComputationalefficiencycomparisonFE/BE(directmethod)Matrixsize:Half-bandwidth:BandedLUdecomposition:flop=2np2+2npCholeskydecomposition:flop=np2+7n

7、p+2n+n*flop(sqrt)LDLTdecompositionflop=np2+8np+nFDTD:flop=Nsteady*flopiter=56sqrt(2)N(N+2NPML)2cmax/cbk2004-12-2210Qianqian'sPhDThesisDefenseFLOPcountvs.meshsizeTheresultmaybedifferentif:FEusesaniterativesolverusesapproximatedBCFDTDusepolarcoordinateseparateworkingv

8、olume andPMLlayer2004-12-2211Qianqian'sPhDThesisDefenseForwardfieldaccuracy2D/3Dscalar/3Dvectorinhomogeneousandinhomogeneouscases2004-12-2

当前文档最多预览五页,下载文档查看全文

此文档下载收益归作者所有

当前文档最多预览五页,下载文档查看全文
温馨提示:
1. 部分包含数学公式或PPT动画的文件,查看预览时可能会显示错乱或异常,文件下载后无此问题,请放心下载。
2. 本文档由用户上传,版权归属用户,天天文库负责整理代发布。如果您对本文档版权有争议请及时联系客服。
3. 下载前请仔细阅读文档内容,确认文档内容符合您的需求后进行下载,若出现内容与标题不符可向本站投诉处理。
4. 下载文档时可能由于网络波动等原因无法下载或下载错误,付费完成后未能成功下载的用户请联系客服处理。