PHANTOM DESIGN, METHOD FOR HIGH-FIELD MRI HUMAN SYSTEMS

这个子项目是许多研究子项目中利用 资源由NIH/NCRR资助的中心拨款提供。子项目和 调查员(PI)可能从NIH的另一个来源获得了主要资金， 并因此可以在其他清晰的条目中表示。列出的机构是 该中心不一定是调查人员的机构。 根据样品的射频场波形特性，提出了一种适用于高场磁共振成像的体模设计方法，并在7.0T和3.0T下进行了实验验证。具有给定射频线圈系统的体模中的射频场分布主要由样品相对于样品内部波长的大小以及位移和传导电流之间的比率决定。实验结果表明，在相同或不同场强下，只要样品介质中相应的波长标度了尺寸和穿透常数，就可以用体模再现与人体样品中的波动行为相关的磁共振图像强度图案。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. A phantom design method suitable for high-field MRI based on the RF field wave characteristics of sample and experimental validations at 7.0 T and 3.0 T are presented. The RF field distribution in a phantom with a given RF coil system is primarily determined by the sample size relative to the wavelength inside the sample, and the ratio between the displacement and conduction currents. Experimental results demonstrate that the MR image intensity patterns associated with wave behavior in human samples at a given field strength can be reproduced with a phantom at the same or different field strengths once the dimension and penetration constant are scaled by the corresponding wavelength in the sample medium.