Resolution improvement by decreasing the drive field amplitude

A. Weber, T. Buzug, Jürgen Weizenecker, Jürgen Rahmer, Jochen Franke, Ulrich Heinen


In Magnetic Particle Imaging the signal is generated by an oscillating magnetic field, the so-called Drive Field. Thereby, increasing the Drive Field amplitude (DFA) yields higher signal strength [1]. Furthermore, the sensitive area which is covered by the field-free point is determined by the ratio between the DFA and the gradient strength [2]. This area scaling with the DFA is referred to as drive field field-of-view (DF-FoV). While the spatial shape of a certain system function component (SFC) does not change with varying DFA [3], its spatial extent scales with the DFA and therefore the same component describes a different resolution for different DFA values. In general, decreasing the DFA reduces the signal strength of each SFC, but at the same time SFCs determining a certain resolution level typically appear at lower frequencies with higher signal intensities. In this work a 2D simulation study is performed to evaluate the effect of decreasing the DFA.
Original languageEnglish
Title of host publication2015 5th International Workshop on Magnetic Particle Imaging (IWMPI)
Number of pages1
Publication date01.03.2015
ISBN (Print)978-1-4799-7269-2
ISBN (Electronic)978-1-4799-7271-5
Publication statusPublished - 01.03.2015
Event5th International Workshop on Magnetic Particle Imaging (IWMPI) - Istanbul, Turkey
Duration: 26.03.201528.03.2015


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