Artifacts in field free line magnetic particle imaging

Author

Medimagh, Hanne ; Weissert, Patrick ; Bringout, Gael ; Bente, Klaas ; Weber, Matthias ; Grafe, Ksenija ; Cordes, Aileen ; Buzug, Thorsten M.

Author_Institution

Inst. of Med. Eng., Univ. of Luebeck, Luebeck, Germany

fYear

2015

fDate

26-28 March 2015

Firstpage

1

Lastpage

1

Abstract

Field Free Line (FFL) Magnetic Particle Imaging (MPI) allows for system function [1] or Radon based [2] image reconstruction and for projection imaging [3]. In light of efforts to scale up imaging systems (e.g. from mouse/rat size [3-6] to rabbit size [7]) and/or to increase the size of the field of view (FOV) compared to the bore of the scanner [8], the question gains in importance how the imaging process is affected by magnetic field inhomogeneities and gradient field nonlinearities, which may deform the FFL compared to an FFL produced by idealized homogeneous/linear magnetic fields. Moreover, truncation effects are an important aspect that has so far not been studied in FFL MPI. This contribution presents initial results of a comprehensive simulation study comparing Radon based and system function based image reconstruction in FFL MPI, both under idealized field conditions and in the presence of magnetic field inhomogeneities and gradient field nonlinearities.

Keywords

biomagnetism; image reconstruction; magnetic field effects; magnetic particles; medical image processing; radon; FFL MPI artifacts; FOV size; field free line MPI; field of view size; gradient field nonlinearities; imaging process; magnetic field inhomogeneities; magnetic particle imaging; projection imaging; radon-based [2] image reconstruction; system function-based image reconstruction; truncation effects; Biomedical imaging; Deconvolution; Image reconstruction; Magnetic fields; Magnetic particles; Nonhomogeneous media;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetic Particle Imaging (IWMPI), 2015 5th International Workshop on

Conference_Location

Istanbul

Print_ISBN

978-1-4799-7269-2

Type

conf

DOI

10.1109/IWMPI.2015.7107043

Filename

7107043