Multidimensional motion correction in MRI

MRI 中的多维运动校正

• 批准号: RGPIN-2016-05835
• 负责人: Drangova, Maria
• 金额: $ 2.99万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=632945
• 关键词: Multidimensional; motion; correction; MRI

BACKGROUND: The availability of high field strength magnetic resonance imaging (MRI) scanners is driving resolution to higher levels. However subject motion can often negate the benefits of increasing field strength by blurring images or introducing artifacts. Degradation in image quality is a result of the motion itself and the change in local magnetic field uniformity resulting from the motion. Therefore methods for rapid measurement of motion in six-degrees of freedom (DoF) and rapid generation of a magnetic field (B0) map, which can be used for active shimming, are required.

背景：高场强磁共振成像（MRI）扫描仪的可用性正在将分辨率推向更高水平。然而，受试者运动通常会通过模糊图像或引入伪影来抵消增加场强的益处。图像质量的劣化是运动本身和由运动引起的局部磁场均匀性的变化的结果。因此，需要用于快速测量六自由度（DoF）中的运动和快速生成磁场（B0）图的方法，其可用于主动匀场。