Helical scanning 3D magnetic particle imaging technology

Abstract

Magnetic particle imaging (MPI) is a novel emerging tomographic technique with high resolution and high sensitivity. Typically, the magnetic fields of MPI scanners are generated by current-carrying coils, resulting in an immense power consumption and making it difficult to apply in clinical research. Halbach array-based MPI devices offer a new solution that greatly reduces device power consumption while providing high gradients. In this work, a mechanically-driven scanning MPI technique was designed using Halbach arrays. This design enables the device to achieve an imaging field of view(FOV) with a diameter of 45 mm, a simulated imaging resolution better than 0.5 mm, and a power consumption of less than 1.5 kW. The feasibility of the device was analyzed through simulation and image reconstruction. In this design, we used extended PSF and extended FOV after deconvolution reconstruction method, which improves the reconstruction resolution by 2-3 times.