<p>An apparatus for determining the probability that the shadow of a tumor designated on a radiation image of an object is the shadow of a malignant tumor on the basis of an image signal representing the radiation image includes a spectrum calculating means, a characteristic value calculating means, and a judging means. The spectrum calculating means obtains the spectrum distribution of the image signal D(r, theta ) whose coordinates are expressed in polar form with the origin taken as the approximate center of the shadow. From the spectrum distribution the characteristic value calculating means obtains a characteristic value, which the judging means uses to determine the probability that the shadow of a tumor is the shadow of a malignant tumor.</p>
申请公布号
EP0405455(A2)
申请公布日期
1991.01.02
申请号
EP19900112143
申请日期
1990.06.26
申请人
FUJI PHOTO FILM CO., LTD.
发明人
ITO, WATARU, FUJI PHOTO FILM CO., LTD.;HARA, SHOJI, FUJI PHOTO FILM CO., LTD.