Gradient-coil-free vertical magnetic particle imaging equipment, imaging system and imaging method

The invention relates to a gradient-coil-free vertical magnetic particle imaging device, imaging system and imaging method.The gradient-coil-free vertical magnetic particle imaging device comprises a plurality of annular Halbach array modules, a rotating mechanism, a translation mechanism and a lifting mechanism, and the rotating mechanism is installed at the lifting end of the lifting mechanism; the translation mechanism is mounted at the rotating end of the rotating mechanism; the plurality of annular Halbach array modules are fixed at the translation end of the translation mechanism at intervals up and down; in the multiple annular Halbach array modules, the direction difference of planar magnetic fields of every two adjacent Halbach array modules is 180 degrees, and the central axis of the rotating mechanism and the central axes of the multiple annular Halbach array modules are all vertically arranged. According to the invention, the spatial position of the MPI imaging magnetic field based on the permanen