1 results about "Negative correlation" patented technology

The present application relates to the field of health care information technology, and in particular to a primary liver cancer postoperative micro-metastasis detection method based on multispectral molecular imaging. A high-frequency echo proportion map is constructed by means of an undetected radio frequency signal, and a liver parenchyma region is segmented to exclude scar interference; a pulsation amplitude map is extracted by means of a multispectral photoacoustic time sequence image, and the phase is corrected in speed by means of the high-frequency echo proportion map to eliminate speed distortion caused by the scar; background subtraction is performed based on the average drift trend of the liver parenchyma region to generate a net signal enhancement map; a negative correlation linear model of the pulsation amplitude and the net signal is fitted in the liver parenchyma, and the residual is calculated to represent metabolic clearance abnormalities; the residual and the corrected phase map are weighted and fused to generate a supply and demand imbalance index, and accordingly, an abnormal region is adaptively identified. The method effectively decouples structural artifacts and abnormal regions, and significantly improves detection specificity and positioning accuracy.