Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Wavelet Based Sparse Row-Action Method for Image Reconstruction in
  Magnetic Particle Imaging   Magnetic Particle Imaging (MPI) is a preclinical imaging technique capable of
visualizing the spatio-temporal distribution of magnetic nanoparticles. The
image reconstruction of this fast and dynamic process relies on efficiently
solving an ill-posed inverse problem. Current approaches to reconstruct the
tracer concentration from its measurements are either adapted to image
characteristics of MPI but suffer from higher computational complexity and
slower convergence or are fast but lack in the image quality of the
reconstructed images. In this work we propose a novel MPI reconstruction method
to combine the advantages of both approaches into a single algorithm. The
underlying sparsity prior is based on an undecimated wavelet transform and is
integrated into a fast row-action framework to solve the corresponding MPI
minimization problem. Its performance is numerically evaluated against a
classical FISTA approach on simulated and real MPI data. We also compare the
results to the state-of-the-art MPI reconstruction methods. In all cases, our
approach shows better reconstruction results and at the same time accelerates
the convergence rate of the underlying row-action algorithm.

9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an