公开(公告)号：CA2177472A1

公开(公告)日：1995-06-01

申请号：CA2177472

申请日：1994-11-29

Applicant: ARCH DEV CORP

Inventor： GIGER MARYELLEN L ,  DOI KUNIO ,  LU PING ,  HUO ZHIMIN

IPC: A61B6/00 ,  G06K9/00 ,  G06T1/00 ,  G06T7/00 ,  A61B6/03

Abstract: A method and system for automated detection and classification of masses in mammograms. This method and system include the performance of iterative, multi-level gray level thresholding (202), followed by lesion extraction (203) and feature extraction techniques (205) for classifying true masses from false-postive masses and malignant masses from benign masses. The method and system provide improvements in the detection of masses including multi-gray-level thresholding (202) of the processed images to increase sensitivity and accurate region growing and feature analysis to increase specificity. Novel improvements in the classification of masses include a cumulative edge gradient orientation histogram analysis relative to the radial angle of the pixels in question; i.e either around the margin of the mass or within or around the mass in question. The classification of the mass leads to a likelihood malignancy.