Measurement and correction of microscopic head motion during magnetic resonance imaging of the brain.

ABSTRACT: Magnetic resonance imaging (MRI) is a widely used method for non-invasive study of the structure and function of the human brain. Increasing magnetic field strengths enable higher resolution imaging; however, long scan times and high motion sensitivity mean that image quality is often limited by the involuntary motion of the subject. Prospective motion correction is a technique that addresses this problem by tracking head motion and continuously updating the imaging pulse sequence, locking the imaging volume position and orientation relative to the moving brain. The accuracy and precision of current MR-compatible tracking systems and navigator methods allows the quantification and correction of large-scale motion, but not the correction of very small involuntary movements in six degrees of

SUBMITTER: Maclaren J 

PROVIDER: S-EPMC3492340 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature