To highly accurately discover and extract the mastadenoma region from an ultrasonic three-dimensional image.
A characteristic quantity operating process wherein to each of three-dimensional voxels a tumor region, surrounding normal tissues and the borderline of both regions on an ultrasonic image are expressed as a membership function utilized for a fuzzy estimation, a membership function automatically forming process contg. a process for automatically extracting the tumor region based on a fuzzy estimation process, a fuzzy estimation process wherein each voxel is classified into regions of a specified no. of types based on the fuzzy estimation process and a defuzzy process contg. a process wherein a non-fuzzy making process based on a relaxation method is performed on each voxel and a process wherein followed by the preceding process, each voxel is classified into either of 'a tumor', 'a normal tissue' or 'a borderline' to perform the final decision of the tumor region, are provided.
AKIYAMA IWAKI
ITO KOICHI
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