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SUMMARY:Quantitative PhotoAcoustics Using the Transport Equation - Arridge
 \, S (University College London)
DTSTART:20140210T114500Z
DTEND:20140210T123000Z
UID:TALK50755@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Quantitative photoacoustic tomography involves the reconstruct
 ion of a photoacoustic image from surface measurements of photoacoustic wa
 ve pulses followed by the recovery of the optical properties of the imaged
  region. The latter is\, in general\, a nonlinear\, ill-posed inverse prob
 lem\, for which model-based inversion techniques have been proposed. Here\
 , the full radiative transfer equation is used to model the light propaga-
 \ntion\, and the acoustic propagation and image reconstruction solved usin
 g a pseudo-spectal time-domain method. Direct inversion schemes are imprac
 tical when dealing with real\, three-dimensional images. In this talk an a
 djoint field method is used to efficiently calculate the gradient in a gra
 dient-based optimisation technique for simultaneous recovery of absorption
  and scattering coefficients.\n\nJoint work with B. Cox\, T. Saratoon\, T.
  Tarvainen.\n
LOCATION:Seminar Room 1\, Newton Institute
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