Giovannetti Giulio, Frijia Francesca, Flori Alessandra, Positano Vincenzo
CNR Institute of Clinical Physiology, 56124 Pisa, Italy.
Bioengineering Unit, Fondazione Toscana G. Monasterio, 56124 Pisa, Italy.
Sensors (Basel). 2025 Apr 23;25(9):2673. doi: 10.3390/s25092673.
Clinical research groups rarely have easy access to dedicated animal Magnetic Resonance (MR) systems. For this reason, dedicated hardware has to be developed to optimize small animal imaging on clinical scanners. In MR systems, radiofrequency (RF) coils are key components in the acquisition process of the MR signal, and the design of hand-crafted, organ-specific RF coils can be a constraint in many research projects. Accurate design and simulation processes enable the optimization of RF coil performance for a given application by avoiding trial-and-error approaches. This paper describes the full-wave simulation of a solenoidal coil for Magnetic Resonance Imaging (MRI) using the finite-difference time-domain (FDTD) method. Such a simulator enables the estimation of the coil's magnetic field pattern in a loaded condition, the coil inductance, and the sample-induced resistance. The resulting accuracy is verified with data acquired with a solenoid prototype designed for small animal experiments with a 3T MRI clinical scanner.
临床研究团队很少能够轻松使用专用的动物磁共振（MR）系统。因此，必须开发专用硬件以优化临床扫描仪上的小动物成像。在MR系统中，射频（RF）线圈是MR信号采集过程中的关键部件，而手工制作的、针对特定器官的RF线圈设计可能会成为许多研究项目的限制因素。精确的设计和仿真过程能够通过避免反复试验的方法，针对给定应用优化RF线圈性能。本文描述了使用时域有限差分（FDTD）方法对用于磁共振成像（MRI）的螺线管线圈进行全波仿真。这样的模拟器能够估计加载条件下线圈的磁场模式、线圈电感以及样品感应电阻。通过使用为3T MRI临床扫描仪的小动物实验设计的螺线管原型采集的数据，验证了所得结果的准确性。
