Workshop on Bioimaging I, Wed, 14 Nov, 2007
Speaker: Günther Paltauf
Abstract
A method for photoacoustic tomography (PAT) is presented that uses line integrals over the acoustic wave field from a photoacoustic source for the reconstruction of a three-dimensional image. The line integrals are acquired with an optical line sensor based on a Mach-Zehnder interferometer. Image reconstruction is a two-step process. In the first step data from a scan of the line outside the object is used to reconstruct a linear projection of the source distribution. In the second step the inverse linear Radon transform is applied to multiple projections taken at different directions. Different scanning curves of the line detector are compared, such as a pi- arc or an “L” formed by two lines. Using experimental data from phantoms, time domain direct and iterative reconstruction algorithms as well as frequency domain (FD) algorithms are compared for reconstruction of the linear projections.
URL: www.ricam.oeaw.ac.at/specsem/ssqbm/participants/abstracts/index.php
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