55 citations · 72 across the 8 of their papers we have counts for
9 papers
On the Configurations of Closed Kinematic Chains in three-dimensional Space
Gerhard Zangerl, Alexander Steinicke
A kinematic chain in three-dimensional Euclidean space consists of links that are connected by spherical joints. Such a chain is said to be within a closed configuration when i…
Multi-Scale Factorization of the Wave Equation with Application to Compressed Sensing Photoacoustic Tomography
Gerhard Zangerl, Markus Haltmeier
Performing a large number of spatial measurements enables high-resolution photoacoustic imaging without specific prior information. However, the acquisition of spatial measurements…
On the Configuration Space of planar closed Kinematic Chains
Gerhard Zangerl
A planar kinematic chain consists of links connected by joints. In this work we investigate the space of configurations, described in terms of joint angles, that guarantee that…
Photoacoustic image reconstruction from full field data in heterogeneous media
Markus Haltmeier, Gerhard Zangerl, Robert Nuster +1
We consider image reconstruction in full-field photoacoustic tomography, where 2D projections of the full 3D acoustic pressure distribution at a given time T>0 are collected. We di…
Photoacoustic Tomography with Direction Dependent Data: An Exact Series Reconstruction Approach
Gerhard Zangerl, Sunghwan Moon, Markus Haltmeier
Photoacoustic image reconstruction often assumes that the restriction of the acoustic pressure on the detection surface is given. However, commonly used detectors often have a cert…
Full field inversion in photoacoustic tomography with variable sound speed
Gerhard Zangerl, Markus Haltmeier, Linh V. Nguyen +1
Recently, a novel measurement setup has been introduced to photoacoustic tomography, that collects data in the form of projections of the full 3D acoustic pressure distribution at…
Douglas-Rachford Algorithm for Magnetorelaxometry Imaging using Random and Deterministic Activations
Markus Haltmeier, Gerhard Zangerl, Peter Schier +1
Magnetorelaxometry imaging is a novel tool for quantitative determination of the spatial distribution of magnetic nanoparticle inside an organism. The use of multiple excitation pa…
Exact Series Reconstruction in Photoacoustic Tomography with Circular Integrating Detectors
G. Zangerl, O. Scherzer, M. Haltmeier
A method for photoacoustic tomography is presented that uses circular integrals of the acoustic wave for the reconstruction of a three-dimensional image. Image reconstruction is a…
A Reconstruction Algorithm for Photoacoustic Imaging based on the Nonuniform FFT
M. Haltmeier, O. Scherzer, G. Zangerl
Fourier reconstruction algorithms significantly outperform conventional back-projection algorithms in terms of computation time. In photoacoustic imaging, these methods require int…