Postdoctoral Fellowship Study of X-Ray Optical Mammograph.
Abstract
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 lp/mm and 8.4 lp/mm, respectively, compared with 5.4 lp/mm without the optics using a 0.3 mm focal spot and optimal magnification.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1995
- Accession Number
- ADA303164
Entities
People
- Carmen C. Abreu
- Carolyn A. Macdonald
Organizations
- State University of New York at Albany