Rotation Correction with Self-Navigated MRI

Jason Mendes¹, Dennis L. Parker¹

This work provides a demonstration that in-plane rotational motion that occurs during the acquisition of MRI data can be quantified using a self-navigation technique. The proposed technique compares adjacent sets of measurement lines in k-space to detect and quantify object rotation. This method can be applied to any segmented sequence that samples k-space in sets of equally spaced lines. It does not require any patient preparation or the acquisition of separate navigator data. The method only requires a slight increase in the field of view along the phase encoding direction, but the increase required is small enough that resolution or total scan time are not significantly affected.