International Journal on Magnetic Particle Imaging
Vol 6 No 2 Suppl. 1 (2020)
https://doi.org/10.18416/IJMPI.2020.2009030

Proceedings Articles

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

Main Article Content

Marija Boberg (University Medical Center Hamburg-Eppendorf), Tobias Knopp , Martin Möddel 

Abstract

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.
 
Int. J. Mag. Part. Imag. 6(2), Suppl. 1, 2020, Article ID: 2009030, DOI: 10.18416/IJMPI.2020.2009030

Article Details

Most read articles by the same author(s)

1 2 3 > >>