Simulation, Measurements and Image Processing for Capillary Optical Digital Mammography
Abstract
Capillary optics which use total external reflections to transmit x rays have been shown to have significant advantages in scatter reduction and resolution improvement in mammographic applications. The purpose of the proposed work is to perform lens simulations and image artifact elimination as part of the work of capillary optical mammography research. During the first year of the task, a lens simulation extended from the previous single fiber simulation has been implemented, a lens for the protocol mammography system has been re-measured in an extended energy range and analyzed with the program. The simulation has been proved to he helpful in understanding the lens performance. To observe the effects of artifacts on resolution, the Modulation Transfer Function (MTF) should be measured. MTF is the most fundamental measurement of spatial resolution used in radiology. Non-uniform transmission introduces difficulties in MTF measurement. A technique to measure MTF by taking an edge image and subtract the background has been developed. However, at the present time, the processed result was better than the expected ideal case for some unknown reasons. Further work is needed to find out the reason for this disagreement.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1998
- Accession Number
- ADA360959
Entities
People
- Lei Wang
Organizations
- State University of New York at Albany