Stephanie Blanke

Artifact reduction for Radon-based image reconstruction in magnetic particle imaging with an FFL-scanner - Project S3

Reliable and fast medical imaging techniques are indispensable for diagnostics in clinical everyday life. A promising example of those is given by magnetic particle imaging (MPI) whose purpose is to recover the spatial distribution of magnetic particles injected into the patient's blood vessels for visualization of the blood flow via exploiting their non-linear magnetization response to changing magnetic fields. Within our research, we dedicate ourselves towards using a field-free line for spatial encoding. Then, the data acquisition process resembles the one of computerized tomography and we therefore are interested in the applicability of Radon-based image reconstruction methods for this case. In practice, however, we are confronted with imperfections of the applied magnetic fields leading to deformed low-field volumes and, when ignored, image artifacts. Our aim is to modify the aforementioned reconstruction techniques so that they are able to deliver artifact-free or at least artifact-reduced images. Besides, we will stay in constant exchange with the RTG’s project S1, which deals with kernel-based approximation methods and whose main application interests lay also in MPI.

Advisor: Jun.-Prof. Dr. Christina Brandt

Co-Advisor: Prof. Dr. Armin Iske

16.12.2020

Lothar-Collatz-Seminar (online): "Radon-based image reconstruction in magnetic particle imaging with an FFL-scanner."

22.-25.03.2021

Workshop on Modeling, Simulation & Optimization of Fluid Dynamic Applications (Online): “Computerized Tomography and Magnetic Particle Imaging using a Field-Free Line - Similarities and Differences"

22.-24.09.2021

2nd Alps-Adriatic Inverse Problems Workshop, Chemnitz Inverse Problems Symposium on tour, Klagenfurt am Wörthersee (AUT): “Radon-based image reconstruction in magnetic particle imaging using an FFL-scanner”

21.-24.03.2022

YRM & CSE Workshop on Modeling, Simulation & Optimization of Fluid Dynamic Applications, Groß Schwansee (GER): “Motion Compensation for Magnetic Particle Imaging using an FFL-Scanner”

21.-25.03.2022

SIAM Conference on Imaging Science (Online): “Time-Dependent Image Reconstruction in Magnetic Particle Imaging with an FFL-Scanner”

03.-05.05.2022

3rd IMA Conference on Inverse Problems from Theory to Application, Edinburgh (GBR): “Artifact Reduction for Magnetic Particle Imaging with an FFL-Scanner and Dynamic Particle Concentrations” (poster)

15.-19.08.2022

GAMM Annual Meeting 2022, Aachen (GER): “Magnetic Particle Imaging using an FFL-Scanner: Radon-based Image Reconstruction for Dynamic Particle Concentrations"

12.-16.12.2022

Inverse Days 2022, Kuopio (FIN): "Field-free Line Magnetic Particle Imaging: Artifact Reduction for Time-dependent Tracer Concentrations"

S. E. Blanke, B. N. Hahn, and A. Wald: „Inverse problems with inexact forward operator: iterative
regularization and application in dynamic imaging”, Inverse Problems, vol. 36, no. 12, p. 124001, doi: 10.1088/1361-6420/abb5e1, 2020.