The SYRMEP Collaboration (SYnchrotron Radiation for MEdical Physics), is conducting a research project in digital mammography and plans to use a monochromatic X-ray beam provided by Elettra, the synchrotron radiation facility in operation in Trieste (Italy), in conjunction with a novel silicon pixel detector. A set of silicon strip detectors was arranged to form a matrix of pixels. This prototype with a sensitive area of 24 1 mm 2 (i.e. 2 48 pixels of 0.5 0.5 mm 2 ) has been used to produce images with X-rays.