2024/11/05 by Ting-Ou Liang, Liang, Ting-Ou, Mengyi Xu +5
Engineering · #Electric Motor Design and Analysis #FOS: Physical sciences #Medical Physics (physics.med-ph)
paper · pdf · doi:10.48550/arxiv.2411.03249
openalex publication_date 2024/11/05 · openalex created_date 2024/11/15 · openalex updated_date 2026/07/28
Permanent magnet array (PMA) is a popular option to provide the main magnetic field in a dedicated portable magnetic resonance imaging (MRI) system because it does not need power or a cooling system and has a much stronger field strength compared to a resistive magnet. Aside from the popular Halbach array that has a transversal field direction, the Inward-Outward ring (IO ring) array is a promising candidate that offers a longitudinal field direction with various design and engineering possibilities. In this article, a thorough study of IO ring arrays is conducted by examining the relation between the design parameters and its field patterns, its variants that lead to different applications and their properties. A detailed comparison between an IO ring array and Halbach array was conducted and reported. Moreover, the feasibility of building an IO ring array in a lab is demonstrated. The investigations strongly indicate that IO ring is a promising candidate that can offer high and homogeneous fields or a desired field pattern to portable MRI systems. With a longitudinal field direction, an IO ring array opens up opportunities to adopt MRI advanced technology and techniques in a portable system to improve image quality and shorten scan time.