[Direct digital magnification mammography with a large-surface detector made of amorphous silicon].
OBJECTIVE
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.


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.
Hermann
K P
KP
Institut für Medizinische Physik und Biophysik, Georg-August-Universität Göttingen. kherman@gwdg.de
Hundertmark
C
C
Funke
M
M
von Brenndorff
A
A
Grabbe
E
E
D004867:Equipment Design; D005260:Female; D006801:Humans; D008327:Mammography / Q000295:instrumentation* / Q000379:methods / Q000706:statistics & numerical data; D019047:Phantoms, Imaging; D011856:Radiographic Image Enhancement / Q000295:instrumentation*; D011858:Radiographic Magnification / Q000295:instrumentation* / Q000706:statistics & numerical data; D012825:Silicon; D014963:X-Ray Intensifying Screens
D012825:Silicon
Direkt digitale Vergrösserungsmammographie mit einem grossflächigen Detektor aus amorphem Silizium.