Trajectory analysis for magnetic particle imaging

T. Knopp*, S. Biederer, T. Sattel, J. Weizenecker, B. Gleich, J. Borgert, T. M. Buzug

*Corresponding author for this work
102 Citations (Scopus)


Recently a new imaging technique called magnetic particle imaging was proposed. The method uses the nonlinear response of magnetic nanoparticles when a time varying magnetic field is applied. Spatial encoding is achieved by moving a field-free point through an object of interest while the field strength in the vicinity of the point is high. A resolution in the submillimeter range is provided even for fast data acquisition sequences. In this paper, a simulation study is performed on different trajectories moving the field-free point through the field of view. The purpose is to provide mandatory information for the design of a magnetic particle imaging scanner. Trajectories are compared with respect to density, speed and image quality when applied in data acquisition. Since simulation of the involved physics is a time demanding task, moreover, an efficient implementation is presented utilizing caching techniques.

Original languageEnglish
JournalPhysics in Medicine and Biology
Issue number2
Pages (from-to)385-397
Number of pages13
Publication statusPublished - 21.01.2009


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