Reducing displacement artifacts by warping system matrices in efficient joint multi-patch magnetic particle imaging

Boberg, Marija; Knopp, Tobias; Möddel, Martin

doi:10.15480/882.4430

Reducing displacement artifacts by warping system matrices in efficient joint multi-patch magnetic particle imaging

Citation Link: https://doi.org/10.15480/882.4430

Publikationstyp

Journal Article

Date Issued

2020-09-02

Sprache

English

Author(s)

Boberg, Marija

Knopp, Tobias

Möddel, Martin

Institut

Biomedizinische Bildgebung E-5

TORE-DOI

10.15480/882.4430

TORE-URI

http://hdl.handle.net/11420/7315

Journal

International journal on magnetic particle imaging

Volume

6

Issue

2, Suppl 1

Start Page

1

End Page

3

Article Number

2009030

Citation

International Journal on Magnetic Particle Imaging 6 (2, Suppl 1): 2009030, 1-3 (2020)

Publisher DOI

10.18416/IJMPI.2020.2009030

Scopus ID

2-s2.0-85090286348

Publisher

Infinite Science Publishing

The reconstruction of multi-patch magnetic particle imaging data requires a compromise between image quality and calibration time. While optimal image quality is ensured by the joint reconstruction approach, a system matrix needs to be acquired for each patch. One can reuse system matrices by shifting them in space, which decreases the calibration effort but leads to distortions due to field imperfections. In this work, we introduce a method for reducing displacement artifacts in the efficient joint multi-patch reconstruction. Based on the magnetic fields we propose a mapping that warps the central system matrix to capture the spatial displacement of off-center system matrices. In this way, we can maintain the low calibration time while significantly improving the image quality.