CT自适应融合算法.pdf

ISSN 1673．9418 C0DEN JKYTA8 E—mail：fcst@vip．163．com JournalofFrontiersofComputerScienceandTechnology http：／w／ww．ceaj．org 1673-9·4182／015／09(03)·0·360--08 Tel：+86—10 doi：10．3778~．issn．1673—9418．1410068 基于双树复小波变换的PET／CT自适应融合算法 魏兴瑜 ，周 涛 抖，陆惠玲 ，王文文 1．宁夏医科大学 管理学院，银川 750004 2．宁夏医科大学 理学院，银川 750004 Self-AdaptionFusionAlgorithm ofPET／CTBasedonDual—TreeComplexW avelet Transform WEIXingyu，ZHOU Tao，，LU Huiling，WANGW enwen ‘ 1．SchoolofManagement，NingxiaMedicalUniversity,Yinchuan750004，China 2．SchoolofScience，NingxiaMedicalUniversity,Yinchuan750004，China +Correspondingauthor：E-mail：zhoutaonxmu@126．com W EIXingyu，ZHOU Tao，LU Huiling，eta1．Self-adaption fusion algorithm ofPET／CT based on dual-tree complexwavelettransform．JournalofFrontiersofComputerScienceandTechnology,2015，9(3)：360-367． Abstract：PET／CTmedicalimagefusionhasveryimportantapplicationvalueformedicalimageanalysisanddiseases diagnosis．ItisuseufltoimprovetheimagecontentandaccuracybyfusingPET／CTimages．AimingatPET／CTufsion problem，thispaperproposesaself-adaptionufsionalgorithm ofPET／CT basedondual—treecomplexwavelettrans． ofrm．Firstly,sourcePETandCTimagesafterregistrationaredecomposedlow andhighrfequencysub-imagesusing dual—rteecomplexwavelettransform (DTCWT)．Secondly,accordingtothecharacteristicsoflowrfequencysub—images concentratingthemajorityenergyofthesourceimageanddeterminingtheimagecontour,aufsionrulebasedonself- adaptionGaussianmembershipfunctionisadoptedinlow rfequencysub—bandcoefficients．Thirdly,inhighfrequency sub—images，accordingtotherelationamongregionpixelsandfuzziness，inthefirstlayerofhigh—rfequencycompo— nent，Gaussianmembershipufnctionand3×3fieldwindowsareusedtofusethehigh．rfequencydual—treecomplex TheNationalNaturalScienceFounda