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[Direct digital magnification mammography with a large-surface detector made of amorphous silicon]
K P Hermann1, C Hundertmark, M Funke
1Institut für Medizinische Physik und Biophysik, Georg-August-Universität Göttingen. kherman@gwdg.de
Purpose:
To investigate the image quality of a new direct digital mammography system using a large-area amorphous silicon X-ray detector in a phantom study.
Materials And Methods:
The contrast-detail resolution as a function of the tube voltages, the magnification factors and the mean glandular doses were investigated using dedicated test objects.
Results:
The contrast-detail resolution was significantly improved in comparison with conventional screen-film mammography. Usually, the doses necessary to obtain these high-quality survey mammograms were smaller.
Conclusions:
By combining the direct magnification technique and a digital flat panel detector the limited spatial resolution of such image receptors can be overcome. With this direct digital mammography technique, a digital image was directly captured without an intermediate step of optical or mechanical scan.