Multidimensional motion correction in MRI

摘要：在磁共振成像中，主体运动仍然是一个重要的问题——自愿或生理运动导致图像模糊和其他伪影。目前有一种叫做“导航仪”的技术，在获取图像的过程中使用，可以纠正一维运动。我们的团队一直致力于开发一种三维“导航仪”，可以同时检测到所有维度的运动。我们将面临和努力克服的一些挑战包括确保新的导航仪能够足够快地制造出来，从而不干扰图像的获取，以及开发在大脑和心脏成像过程中使用它们的技术。这项研究将包括许多步骤，首先是优化导航器的获取方式，验证准确性，并在MRI扫描仪上实现。

Summary: Subject motion remains an important problem in magnetic resonance (MR) imaging - voluntary or physiologic motion causes blurring and other artifacts in the images. Currently there is a technique called a "navigator" that is used during the acquisition of the image that can correct for motion in one dimension. Our group has been working on developing a three-dimensional "navigator" to allow motions in all dimensions to be detected simultaneously. Some of the challenges we will face and work to overcome include the ability to ensure that the new navigators can be made fast enough so as not to interfere with the acquisition of the image and to develop techniques for using them during imaging of brain and heart. The research will include many steps, starting with an optimization of the way the navigators are acquired, verification of the accuracy and implementation on the MRI scanners.