首页>
外国专利>
Parallel MRI method for rigid body motion compensation using calibration scan, coil sensitivity map and navigator
Parallel MRI method for rigid body motion compensation using calibration scan, coil sensitivity map and navigator
展开▼
机译:使用校准扫描,线圈灵敏度图和导航器的并行MRI方法进行刚体运动补偿
展开▼
页面导航
摘要
著录项
相似文献
摘要
Magnetic resonance (MR) calibration data are acquired using a plurality of radio frequency receive coils, and both coil sensitivity maps and reference projection vectors are generated based on the MR calibration data. During imaging, extra navigator projection vectors are acquired, or part of the imaging data can be used as navigator projection vectors. Partially parallel imaging (PPI) can performed to enhance the navigation information. The navigator projection vectors and the reference projection vectors are sensitivity weighted using the coil sensitivity maps to generate navigator sensitivity weighted projection vectors (navigator SWPV) and reference sensitivity weighted projection vectors (reference SWPV) respectively, and these are compared to generate subject position information. The subject motions are compensated prospectively or retrospectively using the generated subject position information. The motion compensation may be prospective, performed by adjusting an imaging volume of the PPI based on the subject position information.
展开▼