Investigation of Different Tissue Samples with ΜCT and MPS for Determination of Iron Oxide Concentration in Tracers for MPI

^{Magnetic Particle Imaging (MPI) is a new imaging modality for medical diagnostics. In order to obtain images of clinical relevance, tracers made of ferrofluids need to be injected into the patient. Hence, the iron concentration of the ferrofluids is a critical factor. Measurements have been carried out with a Magnetic Particle Spectrometer (MPS) and a Micro Computed Tomograph (μCT) to examine the properties of ferrofluids in different media and tissues and to determine the concentration.}