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公开(公告)号:US07046833B2
公开(公告)日:2006-05-16
申请号:US10151030
申请日:2002-05-21
申请人: Jun Masumoto , Yoshinobu Sato , Masatoshi Hori , Takamichi Murakami , Takeshi Johkoh , Hironobu Nakamura , Shinichi Tamura , Masaki Miyamoto
发明人: Jun Masumoto , Yoshinobu Sato , Masatoshi Hori , Takamichi Murakami , Takeshi Johkoh , Hironobu Nakamura , Shinichi Tamura , Masaki Miyamoto
IPC分类号: G06K9/00
CPC分类号: G06T7/11 , G06T2207/10081 , G06T2207/30056 , G06T2207/30101
摘要: From CT images having captured an abdomen, a two-dimensional characteristic space is assumed, in which X and Y axes indicate CT values of image data taken in first and second time phases different from each other. In this space, a two-dimensional histogram concerning respective pixels located at the same position in the two time phases is taken as a sample distribution of pixels. A two-variable distribution function is applied to this sample distribution, so as to estimate a matrix distribution of pixels corresponding to the whole liver region. According to this matrix distribution, a range of CT value of pixels corresponding to the liver region is estimated.