7 TESLA TECHNOLOGY FOR FUNCTIONAL IMAGING

这个子项目是许多研究子项目中的一个 由NIH/NCRR资助的中心赠款提供的资源。子项目及 研究者（PI）可能从另一个NIH来源获得了主要资金， 因此可以在其他CRISP条目中表示。所列机构为 研究中心，而研究中心不一定是研究者所在的机构。 Siemens Medical Solutions在过去7年中一直与MGH合作开发高场（7 T）MRI技术 大脑的研究应用。 MGH系统被安装为开发该系统的原型和测试台。 技术. 西门子有专门的3名现场工程师，以促进这一项目和其他项目在MGH，并有一个7 T 埃尔兰根工厂的项目经理 西门子的设备、制造能力和专业知识 是无价的MGH成功地让这个系统运行和优化其性能。 七特斯拉 技术对于所有涉及的人来说仍然是相对较新的;没有已知的可以直接运输的“最佳配置”。 为 例如，我们的资源项目2已经评估了大多数重要子系统的多次迭代。 我们有 使用了3种不同的头部梯度、2种不同的配置类型、2种不同的RF接收器体现，以及无数的RF 线圈。与西门子的合作对于确保该系统针对功能成像进行优化至关重要 所需的应用程序。 阵列技术合作围绕开发128通道接收器系统，目前在 MGH 3 T系统当追索权准备好使用该系统时，将在MGH 7 T系统上复制该系统。MGH将 负责提供和安装前置放大器阵列和第二级放大器。Siemens-MGH大型天线阵 线圈合作已经导致1.5T和3 T 32通道脑阵列作为商业产品。初期有这样的体验 更高的元件数量为西门子提供了这一方向实用性的早期视图。类似地， 广义模式混合问题是西门子感兴趣的;目前的“TIM”平台利用了3x 3等效的 巴特勒矩阵作为模式混合策略。这种方法的成功激发了人们对其他更大规模， 模式混合方案。

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. Siemens Medical Solutions has been working with the MGH for the past 7 years to develop high field (7T) MRI technology for research applications of the brain. The MGH system was installed as a prototype and test-bed for developing this technology. Siemens has dedicated 3 on-site engineers to facilitate this and other projects at the MGH and has a 7T project manager at the factory in Erlangen. Access to equipment, manufacturing ability and expertise at Siemens has been invaluable to MGH for successfully getting this system running and optimizing its performance. Seven Tesla technology is still relatively new for all involved; there is no known "optimal configuration" that can just be shipped. For example, Project 2 of our Resource has evaluated multiple iterations of most of the important sub-systems. We have utilized 3 different head gradients, 2 different types configurations, 2 different RF receiver incarnations, and countless RF coils. The collaboration with Siemens has been crucial for ensuring that this system is optimized for the functional imaging applications desired. The array technology collaboration centers around developing the 128-channel receiver system currently in place on the MGH 3T system. This system will be duplicated on the MGH 7T system when the recourse is ready to utilize it. MGH will be responsible for providing and installing the preamplifier array and second stage amplifiers. The Siemens-MGH large array coil collaboration has already lead to a 1.5T and 3T 32 channel brain array as a commercial product. The early experience into even higher element counts provides Siemens with an early view of the utility of this direction. Similarly, the generalized mode-mixing problem is of interest to Siemens; the current "TIM" platform utilizes a 3x3 equivalent of the Butler matrix as a mode-mixing strategies. The success of this methodology spurs keen interest in other, larger-scale, mode mixing schemes.