Content-based image retrieval applied to BI-RADS tissue classification in screening mammography

Figure 1 Mammograms of different breast tissues. From left to right: BI-RADS I to BI-RADS IV. Corresponding Image Retrieval in Medical Applications (IRMA) codes are given below the images.

Figure 2 Scheme of the MammoSVx content-based image retrieval system. From both the query image and images from the database, features are extracted and an index of similarity between these images is obtained. The most relevant images to the query are retrieved from the database and presented to the user.

Figure 3 Retrieval example of the MammoSVx system. The retrieval is based on breast density, with k = 25 as parameter for singular value decomposition (SVD) and support vector machine (SVM) using the polynomial kernel.