[Direct radiographic magnification mammography with a new microfocus tube. Experimental studies of resolution and radiation exposure].
A recently developed X-ray unit for mammography using microfocal (spot size 0.12-0.05 mm) direct magnification radiography will soon be introduced into clinical practice. Unit arrangement and tube construction have been demonstrated. Mean surface dose was measured using PMMA-phantoms. A dose reduction of up to 50% was obtained in 1.7-fold magnification mammography (full sized views) compared with conventional techniques. The image quality was almost equivalent. However, in comparison with 1.7-fold magnification mammography, a comparable dose range for 4-fold magnifications with the microfocus system was measured with a substantial gain in spatial resolution. These findings satisfy the demands of a modern mammographic unit.
Post
K
K
Abteilung Röntgendiagnostik I, Georg-August-Universität, Göttingen.
Hermann
K P
KP
Funke
M
M
Hundertmark
C
C
Breiter
N
N
Grabbe
E
E
D004867:Equipment Design; D005260:Female; D006801:Humans; D008327:Mammography / Q000295:instrumentation*; D019047:Phantoms, Imaging; D019904:Polymethyl Methacrylate; D011829:Radiation Dosage; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000295:instrumentation*; D011858:Radiographic Magnification / Q000295:instrumentation*; D011874:Radiometry / Q000295:instrumentation*; D012680:Sensitivity and Specificity
D019904:Polymethyl Methacrylate