Lump image region display method and system based on mammary X-ray image

The invention discloses a lump image region display method based on mammary X-ray images. The lump image region display method comprises the steps of: acquiring a mammary X-ray image I1 and offside images thereof; performing preliminary positioning on a suspicious image region in the mammary X-ray image I1; calculating matching cost of the suspicious image region in the offside images by adopting a bilateral analytical approach on the basis of the offside images of the mammary X-ray image I1, and judging matching regions of the suspicious image region in the offside images; making a preliminary judgment on whether the suspicious image region is a suspected lump region; and executing regional searching of the suspected lump region from the preliminary judgment in a referenced library image region, and determining the suspected lump region to be a normal tissue image region or a lump image region. The invention further discloses a lump image region display system based on the mammary X-ray images.