Postdoctoral Fellowship Study of X-Ray Optical Mammography
Final rept. 30 Sep 94-29 Sep 97
STATE UNIV OF NEW YORK AT ALBANY
Pagination or Media Count:
A number of feasibility measurements were performed to assess the x-ray imaging properties of two capillary optics for digital mammography. Optic 1, used in year one, had input and output diameters of 4.15 mm and 7.5 mm, respectively,. Optic 2, used in year two had input and output diameters of 3.62 mm and 6.83 mm, respectively. A mammographic scanning system was constructed to allow imaging of a larger field for some of the measurements. Optic 1 showed good primary transmission, 46. Optic 2 had better linearity at mammographic energies. Images of a Lucite contrast detail phantom, using a lead blocker, showed that both optics provide an increase in image contrast with a contrast improvement of approximately 1.7, and a reduction of scatter fraction to 0.02. The limiting resolution for the CR phosphor plate system was increased to about 8.5 1pmm, with an improvement of the MTF at all spatial frequencies. Clinical training was received by the postdoctoral fellow.
- Medicine and Medical Research
- Nuclear Physics and Elementary Particle Physics