Attenuation and Dispersion in Photoacoustic Imaging - Part I of II
For Part II, see MS-Mo-E-46

Date: August 10
Time: 13:30--15:30
Room: 306B

(Note: Click title to show the abstract.)

Shi, Cong (Univ. of Vienna)
Ammari, Habib (Ecole Normale Superieure)

Abstract: Photoacoustic Imaging is a promising imaging method that visualizes biological material parameters. In a typical PAT session, the object is exposed to a short pulse of an electromagnetic wave. The object absorbs a fraction of the induced energy, heats up, and reacts with thermoelastic expansion. This in turn produces acoustic waves, which can be recorded outside the specimen. The mathematical formulation of PAT is an inverse problem related to the wave equation - to reconstruct the source term of the wave equation from measurements of the
acoustic wave. PAT combines the high resolution of ultrasound waves and high contrast of EM waves.

The classical mathematical models of PAT ignore the attenuation effects and dispersion within the object, which leads to inaccurate images. There are two main challenges in the topic: one is to model the attenuation effect mathematically, the other is to compensate for the effect in image reconstruction. To correctly model the attenuation effect in a given media, we need to investigate the relation between attenuation, dispersion, and causality. It is known that attenuation and
dispersion are connected by the Kramers-Kronig relation. Several attenuation models are documented in the literature, and most of them are derived from power laws. On the other hand, the research on compensation for the attenuation effect has only begun recently, and much remains to be done on both of the problems. This minisymposium focuses on recent advances in this field.

Bayesian approach to image reconstruction in quantitative photoacoustic tomography
Tarvainen, Tanja (Univ. of Eastern Finland)

Asymptotic techniques for Photoacoustic Imaging in attenuating media
Kalimeris, Konstantinos (RICAM)

A stable algorithm for attenuation correction in photo-acoustic imaging
Wahab, Abdul (COMSATS Inst. of Information Tech.)

On time reversal in photoacoustic tomography for tissue similar to water
Kowar, Richard (Univ. of Innsbruck)


Code: Type-Date-Time-Room No.
Type : IL=Invited Lecture, SL=Special Lectures, MS=Minisymposia, IM=Industrial Minisymposia, CP=Contributed Papers, PP=Posters
Date: Mo=Monday, Tu=Tuesday, We=Wednesday, Th=Thursday, Fr=Friday
Time : A=8:30-9:30, B=10:00-11:00, C=11:10-12:10, BC=10:00-12:10, D=13:30-15:30, E=16:00-18:00, F=19:00-20:00, G=12:10-13:30, H=15:30-16:00
Room No.: TBA