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Science-Technology

Published on January 12, 2009

Author: aSGuest10189

Source: authorstream.com

Slide 1: Applications of the CXS to Cancer Medicine E.C. Landahl, J. Boggan, W. Frederick, N.C. Luhmann, Jr. Departments of Applied Science and Electrical and Computer Engineering, University of California, Davis D. Matthews Medical Technologies Program, Lawrence Livermore National Laboratory V. Cooper, K. Iwamoto, A. Norman, T. Solberg Departments of Radiation Oncology and Biomedical Physics, University of California Los Angeles Improvements in Image Receptors Motivate Smaller X-Ray Source Sizes Contrast as Well as Spatial Resolution is Important for Radiography Contrast decreases rapidly with photon energy Low energy means a high patient dose Ideally, energy would be tuned to reach a desired contrast Application of the Compton X-Ray Source to Mammography Dose and Contrast for Radiography For a given target dimension x, what dose is needed to achieve the desired contrast? R is the ratio of scattered to primary radiation, SNR is the desired Signal-to-Noise ratio, e is the detector efficiency, and N/A is the number of photons per unit area

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