Brief description of the location of an element of interest contained in a three-dimensional object, in particular during an examination of stereotaxie in mammography

摘要

As stereotactic images are digitised, the method consists in the following steps: selecting (400) a target pixel in a target region of interest, generating (401), around the selected pixel, a target window of selected dimensional characteristics and containing the said target region of interest, determining (402) in a second image, based on a predetermined criterion of selection, a set of pixels, generating (403) around each selected pixel a second window of the same dimensional characteristics as the said target window, effecting a correlation processing (404) between the grey levels of the pixels of each second window and the grey levels of the target window pixels, so as to obtain a correlation value for each second window, and identifying the region of interest homologous with the target region of interest based on the analysis of the whole set of correlation values obtained, so as to minimise the risks of pairing errors between homologous regions of interest. Then the element of interest is located from the positions of the two homologous regions.