A Correlation-Based Motion Correction Method for Functional MRI

摘要

One serious problem affecting the rest and active state images obtained during a functional MRI (fMRI) study is that of involuntary subject movements inside the magnet while the imaging protocol is being carried out. The small signal intensity rise and small activation areas observed in the fMRI results, such as the statistical maps indicating the significance of the observed signal intensity dif- ference between the rest and active states for each pixel, are greatly affected even by head displacements of less than one pixel.