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1、1000-9825/2005/16(01)0077©2005JournalofSoftware软件学报Vol.16,No.1*感兴趣区域高效提取算法1+123张红梅,卞正中,郭佑民,叶敏1(西安交通大学生命科学与技术学院,陕西西安710049)2(西安交通大学第一附属医院影像中心,陕西西安710061)3(西安交通大学机械学院,陕西西安710049)AnEfficientApproachtoExtractionofRegionofInterestZHANGHong-Mei1+,BIANZheng-Zhong1,GUOYou-Min2,YEMin3
2、1(SchoolofLifeScienceandTechnology,Xi’anJiaotongUniversity,Xi’an710049,China)2(ImagingCenteroftheFirstAffiliatedHospital,Xi’anJiaotongUniversity,Xi’an710061,China)3(SchoolofMehanicalEngineering,Xi’anJiaotongUniversity,Xi’an710049,China)+Correspondingauthor:Phn:+86-29-85236872
3、,E-mail:claramei@mailst.xjtu.edu.cn,http://www.xjtu.edu.cnReceived2003-11-26;Accepted2004-02-20ZhangHM,BianZZ,GuoYM,YeM.Anefficientapproachtoextractionofregionofinterest.JournalofSoftware,2005,16(1):77-88.http://www.jos.org.cn/1000-9825/16/77.htmAbstract:ROI(regionofinterest)
4、playsanimportantroleinmedicalimageanalysis.Inthispaper,anefficientapproachtoROIextractionbasedonmonotonicallymarchingcurveevolutionisproposed.Theimprovementisintwoaspects:first,anewmonotonicallymarchingsnakeintegratingROIinformationispresentedbyminimizingthenewdefinedROIenerg
5、y.Duetotheregionbasedspeedterm,thefrontcouldevenpropagateinlowcontrastandnarrowthinareas.Second,amulti-initialfastmarchingalgorithmisdevelopedfornumericalimplementation,whereamulti-initialschemecanperformtheselectivegrowthofthefront,thusfurtherreducethefrontleaking.Furthermor
6、e,amultiscaleschemefornumericalimplementationisadopted,whereafastpassingsolutionmethodisusedfordeterminingtheinitialsolutiononthefinerscalethatgreatlyreducesthecomputationalcost.ThevalidityoftheproposedapproachisdemonstratedonthemedicalimageROIextraction.Experimentalresultssh
7、owthattheapproachisefficientbothincomputationalcostandsegmentationquality.LowcontrastandnarrowthinROIcouldbeefficientlyextractedpreciselybytheapproach.Keywords:ROI(regionofinterest);curveevolution;multiscalescheme;multi-initialfastmarchingalgorithm;segmentation*Supportedbythe
8、NationalNatureScienceFoundationofChinaunderGrantNos.60271022,6027102
