PARALLEL TRANSMIT ENABLED PULSE SEQUENCE DEVELOPMENT FOR HIGH FIELD MRI

这个子项目是利用资源的许多研究子项目之一。 由NIH/NCRR资助的中心拨款提供。对子项目的主要支持 子项目的首席调查员可能是由其他来源提供的， 包括美国国立卫生研究院的其他来源。为子项目列出的总成本可能 表示该子项目使用的中心基础设施的估计数量， 不是由NCRR赠款提供给次级项目或次级项目工作人员的直接资金。 我们正在开发多通道射频发射系统硬件和方法，以改善7特斯拉的B1一致性 人体核磁共振成像。由于射频波长在7T时变得与人体尺寸相当，图像质量可以 由于通过导电/介电组织的传播延迟而严重退化，导致破坏性 传输的B1场的干扰和严重的不均匀性。通过实施多个发射源和线圈 元件，我们将创建独立传输到每个线圈元件的能力。这一新技术的主要应用 技术上将提高B1的均匀性。 要了解卢卡斯中心正在进行的其他项目，请访问http://rsl.stanford.edu/(卢卡斯年度报告和 ISMRM 2011年摘要)

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. We are developing multi-channel RF transmit systems hardware and methods for improving B1 uniformity for 7 Tesla human MRI imaging. Due to the RF wavelength becoming comparable to human body dimensions at 7T, image quality can be seriously degraded as a result of propagation delays through conductive/dielectric tissue, leading to destructive interference of the transmitted B1 field and serious inhomogeneity. By implementing multiple transmit sources and coil elements, we will create the ability to transmit independently to each coil element. A major application of this new technology will be to improve B1 uniformity. To read about other projects ongoing at the Lucas Center, please visit http://rsl.stanford.edu/ (Lucas Annual Report and ISMRM 2011 Abstracts)