Image analysis – Applications – Biomedical applications
Patent
1995-09-29
1997-01-28
Boudreau, Leo
Image analysis
Applications
Biomedical applications
382132, 36441323, G06K 900
Patent
active
055984819
ABSTRACT:
A method for automated detection of abnormal anatomic regions, wherein a mammogram is digitized to produce a digital image and the digital image is processed using local edge gradient analysis and linear pattern analysis in addition to feature extraction routines to identify abnormal anatomic regions. Noise reduction filtering and pit-filling/spike-removal filtering techniques are also provided. Multiple difference imaging techniques are also used in which difference images employing different filter characteristics are obtained and processing results logically OR'ed to identify abnormal anatomic regions. In another embodiment the processing results with and without noise reduction filtering are logically AND'ed to improve detection sensitivity. Also, in another embodiment the wavelet transform is utilized in the identification and detection of abnormal regions. The wavelet transform is preferably used in conjunction with the difference imaging technique with the results of the two techniques being logically OR'ed.
REFERENCES:
patent: 5262958 (1993-11-01), Chui et al.
patent: 5289374 (1994-02-01), Doi et al.
Doi Kunio
Ema Takehiro
Nishikawa Robert M.
Yoshida Hiroyuki
ARCH Development Corporation
Boudreau Leo
Tran Phuoc
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