UNSUPERVISEDTIMEREVERSALBASEDMICROWAVEIMAGING时间反演肿瘤探测与治疗2013新技术.pdfVIP

UNSUPERVISED TIME REVERSAL BASED MICROWAVE IMAGING FOR BREAST CANCER DETECTION Mohmmad H. S. Sajjadieh and Amir Asif York University Department of Computer Science Engineering 4700 Keele Street, Toronto, Ontario, CANADA M3J 1P3 {mohammad, asif}@cse.yorku.ca ABSTRACT It is, therefore, necessary to have prior knowledge of the response of the normal breast tissues without tumour in an environment iden- Microwave breast imaging is performed by illuminating the breast tical to the one in which the examination for nding anomalies is tissues with a short pulse of microwaves and processing the reec- later conducted. This is not possible even in screening situations be- tions (backscatter) to create a pseudospectrum that detects the pres- cause of the variations in the normal tissues and their growth over ence of the breast tumours specifying their locations. An important time. Therefore, the background subtraction procedure, if used, in- step in such breast cancer detection techniques is the backscatter pre- troduces unwanted distortions in the target response. To decompose conditioning step for effective suppression of the clut