Investigation of Post-Patient Tapered Monolithic Optics for Mammography
Abstract
Polycapillary x-ray optics, arrays of hollow capillary tubes used to guide x rays by total reflectance, have been shown to have potential in medical imaging at mammographic energies. Placing these optics after the object to be imaged provides very efficient rejection of Compton scatter because of the low angular acceptance of the capillaries. A Polycapillary tapered optic produced reduction in scatter fraction of a factor of 5 at 27 keV and 3 at 45 keV for a 53 mm thick polymethyl methacrylate phantom. The contrast enhancement was a factor of 2 at 27 keV and 1.5 at 45 keV. The scatter fraction and contrast data performed with energy sensitive and imaging detectors were in good agreement. A detailed calculation for comparing these broadband and monoenergenic-input scatter fraction data was performed. The agreement provides an innovative new way to - predict the effect of input spectrum on contrast of an image at different energies. The PI also participated, as part of his training, in a variety of other imaging measurements at mammographic energies, including the use of DCC optics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2004
- Accession Number
- ADA428343
Entities
People
- Noor Nail
Organizations
- State University of New York at Albany