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Department of Radiation OncologyDepartment of Radiation Oncology Effects of Scatterer Populations on Temperature Dependence ofEffects of Scatterer Populations on Temperature Dependence of
 

Summary: Department of Radiation OncologyDepartment of Radiation Oncology
Effects of Scatterer Populations on Temperature Dependence ofEffects of Scatterer Populations on Temperature Dependence of
Backscattered Ultrasonic EnergyBackscattered Ultrasonic Energy
Jason W. Trobaugh,Jason W. Trobaugh,
R. Martin Arthur,R. Martin Arthur,
William L. Straube,William L. Straube,
Eduardo G.Eduardo G. MorosMoros
AbstractAbstract
Theoretical and experimental evidence continues to suggest that
backscattered ultrasonic energy changes predictably with temperature.
Previously, theoretical results for a single scatterer showed that
backscattered energy increases or decreases monotonically, depending on
the lipid or aqueous nature of the scatterer. Recent experimental results
showed that the same trend holds for measurements over an image region
subtending multiple scatterers. To extend our theory to a more realistic
tissue composition, we have developed methods for simulating ultrasonic
images of multiple randomly distributed scatterers. In the simulations, the
imaging system was described by its point-spread function, and the tissue
medium was represented by discrete aqueous and lipid scatterers. Images
were simulated to represent temperatures from 37 to 50oC by changing the

  

Source: Arthur, R. Martin - Department of Electrical and Systems Engineering, Washington University in St. Louis

 

Collections: Biology and Medicine; Engineering