Simulation of a Hand-held Magnetic Particle Imaging Device Utilizing Triangular Waveform Scanning

Abstract

Magnetic particle imaging (MPI) is an emerging molecular imaging technique, and one of the focus of current research is the imaging devices for human applications. Both closed and open systems face limitations in terms of spatial and power constraints, affecting the detection of large volume. Hand-held MPI device is the representative of low power consumption in MPI devices. It can provide flexibility in human imaging due to the compact size. Current hand-held device consist of signal detection component and mechanical movement component, lacking a gradient field within the device itself. This limitation significantly impacts the resolution and scanning time of hand-held device. Here, we present the design of a novel hand-held device that simulates the generation and movement of Field Free Point (FFP). It can scan a 20 mm*20 mm area at a depth of 8 mm without the movement. Furthermore, due to the small impedance of coils, triangular wave scanning can be employed to enhance trajectory uniformity during the process.