International Journal on Magnetic Particle Imaging IJMPI
Vol 8 No 1 Suppl 1 (2022): Int J Mag Part Imag
https://doi.org/10.18416/IJMPI.2022.2203061

Proceedings Articles

Comparison of Reconstruction Methods for Measured FFL Data

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Jonas Schumacher  (Fraunhofer Research Institution for Individualized and Cell-Based Medical Engineering IMTE), Mandy Ahlborg  (Fraunhofer Research Institution for Individualized and Cell-Based Medical Engineering IMTE), Eric Aderhold  (Fraunhofer Research Institution for Individualized and Cell-Based Medical Engineering IMTE), Pascal Stagge  (Fraunhofer Research Institution for Individualized and Cell-Based Medical Engineering IMTE), Thorsten M. Buzug (Fraunhofer Research Institution for Individualized and Cell-Based Medical Engineering IMTE), Matthias Gräser  (Fraunhofer Research Institution for Individualized and Cell-Based Medical Engineering IMTE)

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Abstract

System matrix and x-space resonstruction are two of the main approaches for image reconstruction of field free line magnetic particle imaging. A comparative studiy of both options is performed on data from a phantommeasurement in a permanent magnet-based scanner system. The system matrix reconstruction is performed in a hybrid fashion with data obtained in a spectrometer. This data is also used to obtain the relaxation time and particle diameter of the particles used. A deconvolution can then be used to enhance the image quality of the x-space approach which is compared to the system matrix reconstruction. A slight blurring can be depicted in the x-space reconstruction but overall a good agreement between both approaches is reached with the Structural Similarity Index yielding a value of 0.79.

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