configuration to detect and / or locate a magnetic material in an action region, method to detect and / or locate a magnetic material in an action region and computer program

摘要

configuration to detect and / or locate a magnetic material in an action region, method to detect and / or locate a magnetic material in an action region and computer program in the generation of magnetic particle image (mpi), reconstruction requires the knowledge of a so-called system function. this function describes the relationship between the spatial position and the frequency response. for reasonable resolutions and fields of view, the system function becomes relatively large, resulting in longer acquisition times for the system function and high memory demand during reconstruction. the present invention proposes to reduce the size of the system function matrix using the structural properties of the matrix. these properties are, for example, spatial symmetries that reduce the number of columns and identical responses at different frequencies, reducing the number of rows. in other configurations the matrix can be transformed into a sparse representation using appropriate base functions.