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SUMMARY:Barbara Kaltenbacher (University of Klagenfurt)
DTSTART:20220428T160000Z
DTEND:20220428T170000Z
DTSTAMP:20260423T052547Z
UID:Inverse/76
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/Inverse/76/"
 >Imaging with nonlinear and fractionally damped waves</a>\nby Barbara Kalt
 enbacher (University of Klagenfurt) as part of International Zoom Inverse 
 Problems Seminar\, UC Irvine\n\n\nAbstract\nThe importance of ultrasound i
 s well established in the imaging of human tissue. In order to enhance ima
 ge quality by exploiting nonlinear effects\, recently techniques such as h
 armonic imaging and nonlinearity parameter tomography have been put forwar
 d. The latter leads to a coefficient identification problem for a quasilin
 ear wave equation. Another characteristic property of ultrasound propagati
 ng in human tissue is frequency power law attenuation leading to fractiona
 l derivative damping models in time domain. In this talk we will first of 
 all dwell on modeling of nonlinearity on one hand and fractional damping o
 n the other hand. Then we will discuss the linear inverse problem of photo
 acoustic tomography with fractional damping. Finally we return to the inve
 rse problem of nonlinearity parameter imaging and show some first results.
 \n
LOCATION:https://researchseminars.org/talk/Inverse/76/
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