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DIAGNOSISTECHNOLOGYRESEARCHOFMAMMOGRAPHICMASSESINCONTENTBASEDIMAGERETRIEVALSONGLIXIN,WANGQINGYANCOLLEGEOFELECTRICALELECTRONICENGINEERINGHARBINUNIVERSITYOFSCIENCEANDTECHNOLOGYHARBIN,CHINALIXINS99YAHOOCOMCNWANGLIDEPTOFGYNECOLOGYHEILONGJIANGHOSPITALHARBIN,CHINAWANGLI1439163COMWANGQINGYAN1984163COMABSTRACTINORDERTOASSISTDOCTORTODIAGNOSISOFMAMMOGRAPHICMASSES,AMETHODISPROPOSED22FEATURESAREEXTRACTEDFROMEACHQUERIEDREGIONOFINTERESTROIAKNEARESTNEIGHBORKNNALGORITHMISUSEDTORETRIEVESIMILARIMAGESFROMDATABASE,ANDFURTHERCALCULATETHEMUTUALINFORMATIONMIBETWEENTHEQUERIEDIMAGEANDTHEIMAGESWHICHAREINTHERETRIEVALRESULTS,SOASTOIMPROVETHERETRIEVALPERFORMANCEFINALLY,THESCHEMETAKESTHEFIRSTNINEIMAGESWITHTHEHIGHESTMISCORESASTHEFINALRETRIEVALRESULTSWITHTHEPURPOSEOFPROVIDINGAVAILABLEDECISIONMAKINGINFORMATIONOFDIAGNOSTICAIDS,WECOMPAREANDANALYZETHREECALCULATINGMETHODSOFDECISIONINDEXTHEEXPERIMENTRESULTSSHOWTHATTHEMETHODISBETTERTHANMETHODOFUSINGKNNONLY,ANDIMPROVETHEACCURACYOFDIAGNOSISEFFECTIVELYKEYWORDSMAMMOGRAPHYIMAGE；
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