X-ray image bone segmentation.pdf

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1、SegmentationofBoneStructuresinX-rayImagesThesisProposalSubmittedtoSchoolofComputingbyDingFeng(HT040297J)underguidanceofDr.LeowWeeKheng(AssociateProfessor)SchoolofComputingNationalUniversityofSingaporeJuly2006ThesisProposalABSTRACTAbstractMedicalimagesegmentation,asanapplicati

2、onofimagesegmentation,istoextractanatomicalstructuresfrommedicalimages.Inthisthesisproposal,existingmethodsformedicalimagesegmentationarereviewed.Accordingtothereview,segmentationofmultiplebonestructuresincomplexx-rayimagesisnotwellstudied.Thisleadstotheproposedresearchtopic:

3、segmentationofbonestructuresinx-rayimages.Atlas-basedsegmentationisapromisingapproachforsolvingsuchacomplexsegmentationproblem.Preliminaryworkonatlas-basedsegmentationofCTandx-rayimagessuggeststhatthisapproachcanprovidearobustandaccuratemethodforautomaticsegmentationofx-rayim

4、ages.iThesisProposalACKNOWLEDGEMENTAcknowledgementIwanttothankmysupervisor,A/ProfessorLeowWeeKheng,whogavemeinvaluableadviceforwritingthistermpaper.IalsothankRuixuanWang,PiyushKantiBhunreDennisLimShere,YingChen,XiaopingMiaoandShengZhangfortheirpreciouscommentsandsuggestions.i

5、iListofFigures1.1Hipreplacement................................22.1Thresholdingofimagewithbimodalintensitydistribution.........52.2Thresholdingofimagewithmulti-modalintensitydistribution.......62.3Adaptivethresholding.............................62.4Cannyedgedetectionresult..

6、........................72.5Seededregiongrowingsegmentation.....................92.6Modelofthewatershedalgorithm.......................102.7Sampleresultofthewatershedalgorithm..................102.8BoneremovalinaCTimage.........................122.9Fuzzymembershipfunctions...

7、.......................132.10Snakesegmentationofbone..........................142.11Gradientvector ow..............................152.12Mergingofcontours..............................162.13Levelsetsegmentationofheartimage....................172.14Segmentationofcartilagebyact

8、iveshapemodel..............182.15Iterativecorrespondingpoint........