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Figure 6. A very nice example of physics-based filtering where a model of the image formation process of an X-ray mammography image is used to construct a special filter which can improve the noise and spatial representation of microcalcification clusters [9]. The top insert image shows how scatter and the spectral characteristics of the X-ray source have blurred the image, almost completely masking the calcifications (indicative of ductal carcinoma). The bottom insert image shows a vast improvement in the quality of the appearance of the microcalcifications.
