Postdoctoral Fellowship Study of X-Ray Optical Mammograph.
Annual rept. 30 Sep 94-29 Sep 95,
STATE UNIV OF NEW YORK AT ALBANY
Pagination or Media Count:
A number of feasibility measurements of the x-ray imaging properties of a capillary prototype optic for digital mammography were performed. The capillary prototype optic had input and output diameters of 4.15 mm and 7.5 mm, respectively. A mammographic scanning system was constructed to allow imaging of a larger field for some of the measurements. The optic showed good primary transmission 46 at mammography energies. Images of a lucite contrast detail phantom, using a lead blocker, showed that the optic provides an increase in image contrast with a contrast improvement of 1.72 and a reduction of the scatter fraction to 0.018. The limiting resolution for the phosphor plate system CR was measured through the modulation transfer function NTF. The 5 MTF for the stationary and scanned optic was 9 lpmm and 8.4 lpmm, respectively, compared with 5.4 lpmm without the optics using a 0.3 mm focal spot and optimal magnification.
- Medicine and Medical Research
- Anatomy and Physiology