ALL NINGBO XINGAOYI MAGNETISM PRODUCTS MRI SYSTEM SUPERSCAN-1.5T for whole-body tomography high-field MRI SYSTEM OPER-0.35T for whole-body tomography low-field open MRI SYSTEM OPER-0.4T for whole-body tomography low-field open MRI SYSTEM OPER-0.5T for whole-body tomography medium-field open Tomography tomography MRI system Open tomography Low-field tomography High-field tomography Medium-field tomography