Moving table magnetic particle imaging: a stepwise approach preserving high spatio-temporal resolution

Patryk Szwargulski; Nadine Gdaniec; Matthias Graeser; Martin Möddel; Florian Griese; Kannan M. Krishnan; Thorsten M. Buzug; Tobias Knopp

doi:10.1117/1.JMI.5.4.046002

27 November 2018 Moving table magnetic particle imaging: a stepwise approach preserving high spatio-temporal resolution

Patryk Szwargulski, Nadine Gdaniec, Matthias Graeser, Martin Möddel, Florian Griese, Kannan M. Krishnan, Thorsten M. Buzug, Tobias Knopp

Author Affiliations +

Journal of Medical Imaging, Vol. 5, Issue 4, 046002 (November 2018). https://doi.org/10.1117/1.JMI.5.4.046002

Abstract

Magnetic particle imaging (MPI) is a highly sensitive imaging method that enables the visualization of magnetic tracer materials with a temporal resolution of more than 46 volumes per second. In MPI, the size of the field of view (FoV) scales with the strengths of the applied magnetic fields. In clinical applications, those strengths are limited by peripheral nerve stimulation, specific absorption rates, and the requirement to acquire images of high spatial resolution. Therefore, the size of the FoV is usually a few cubic centimeters. To bypass this limitation, additional focus fields and/or external object movements can be applied. The latter approach is investigated. An object is moved through the scanner bore one step at a time, whereas the MPI scanner continuously acquires data from its static FoV. Using a 3-D phantom and dynamic 3-D in vivo data, it is shown that the data from such a moving table experiment can be jointly reconstructed after reordering the data with respect to the stepwise object shifts and heart beat phases.

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Patryk Szwargulski, Nadine Gdaniec, Matthias Graeser, Martin Möddel, Florian Griese, Kannan M. Krishnan, Thorsten M. Buzug, and Tobias Knopp "Moving table magnetic particle imaging: a stepwise approach preserving high spatio-temporal resolution," Journal of Medical Imaging 5(4), 046002 (27 November 2018). https://doi.org/10.1117/1.JMI.5.4.046002

Received: 18 April 2018; Accepted: 1 November 2018; Published: 27 November 2018

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