使用有限元方法对4线圈阵列与带有PET/MRI的铜屏蔽层之间的磁相互作用进行研究。

Study of the magnetic interaction of a 4-coil array and copper shielding with a PET/MRI using the finite-element method.

作者信息

Solis S E, Rodriguez A O, Tomasi D

机构信息

Laboratorio de Imagen y Resonancia Magnética, Universidad Autonoma Metropolitana Iztapalapa, Mexico, DF, 09340 Mexico.

出版信息

Annu Int Conf IEEE Eng Med Biol Soc. 2010;2010:887-8. doi: 10.1109/IEMBS.2010.5627859.

DOI:10.1109/IEMBS.2010.5627859

PMID:21097202

Abstract

The effect of the shielding in a PET-MRI system was numerically estimated by calculating the RF magnetic field, B1, produced by a coil array of 4 independent elements at the resonant frequency of 171 MHz (4T for protons). The array coil is located inside a μPET camera to simultaneously acquire PET and MR images of a rat brain. Profiles showed a good uniformity despite the shielding that is interacting between the coil array and the μPET camera. These limitations are currently being dealt with the fabrication of a birdcage coil design.

摘要

通过计算由4个独立元件组成的线圈阵列在171 MHz（质子为4T）共振频率下产生的射频磁场B1，对PET-MRI系统中的屏蔽效果进行了数值估计。该阵列线圈位于一台微型PET相机内部，用于同时采集大鼠脑部的PET和MR图像。尽管线圈阵列与微型PET相机之间存在相互作用的屏蔽，但剖面图显示出良好的均匀性。目前正在通过制造鸟笼式线圈设计来解决这些限制。