Accession Number : ADA299276
Title : Single-Pulse Dual-Energy Mammography Using a Binary Screen Coupled to Dual CCD Cameras.
Descriptive Note : Annual rept. 15 Jul 94-14 Jul 95,
Corporate Author : CALIFORNIA UNIV DAVIS
Personal Author(s) : Boone, John M.
PDF Url : ADA299276
Report Date : 04 AUG 1995
Pagination or Media Count : 28
Abstract : Normal progress on the scientific objectives of this project are reported. The post-doc has been hired, and is now up to speed with the project. Monte Carlo calculations have been run over an extended period of time, and the scattered photon distribution is now well characterized for clinically relevant breast thicknesses (3-8 cm) and x-ray energies (10-60 keV). In order to characterize different breast parenchyma patterns, a computer score called the Breast Density Index has been conceived and tested, comparing it with the density scoring of an experience mammographer. The design of the dual energy mammography system has been refined, and the mechanical framework for the system is currently being fabricated at a machine shop. A new technique for easily determining the MTF of the optics and CCD camera is being evaluated with promising results. DQE measurements are also underway. The Deslattes x-ray spectrometer is being used in the laboratory to catalog measured x-ray spectra from our mammography system. This device also promises to be very useful in measuring the attenuation coefficients of tissue specimens.
Descriptors : *OPTICS, *X RAY SPECTRA, *PHOTONS, *MAMMARY GLANDS, DENSITY, THICKNESS, SCATTERING, TISSUES(BIOLOGY), COMPUTATIONS, DISTRIBUTION, CLINICAL MEDICINE, MONTE CARLO METHOD, LONG RANGE(TIME), COEFFICIENTS, LABORATORIES, CATALOGS, SHOPS(WORK AREAS), SPECTROMETERS, CANCER.
Subject Categories : Medicine and Medical Research
Distribution Statement : APPROVED FOR PUBLIC RELEASE