Integration of T2-preparation and motion tracking in magnetic resonance imaging
An embodiment in accordance with the present invention provides concurrent measurement of motion during T2-weighted magnetic resonance imaging. The present invention combines T2 preparation, a module used to impart T2 contrast, and motion measurement, tracking, and/or correction. The present invention provides for the expedition of more efficient motion compensation during T2-weighted imaging. The proposed invention can be used to provide a variety of measurements of motion, with no overhead in imaging time. The proposed invention also enables T2 contrast imaging to be executed while a subject is breathing freely, without the additional time cost associated with the standard motion tracking methodologies.
1. A method of obtaining a corrected image of a subject comprising:
using a T2 preparation module comprising RF pulses and gradients to obtain a base magnetic resonance (MR) image of the subject;
inserting motion tracking elements into the T2 preparation module;
determining motion information from the motion tracking elements; and
correcting the base MR image of the subject using the motion information.
2. The method of claim 1 further comprising interspersing said motion tracking elements between 2 consecutive RF pulses.
3. The method of claim 1 further comprising using the method for 1D projection of 2D and 3D volumes.
4. The method of claim 1 further comprising for tracking and correction of respiratory displacement.
5. The method of claim 4 further comprising tracking one of the respiratory displacement of the heart and the motion of the heart itself due to cardiac contraction.
6. The method of claim 1 further comprising tracking affine or non-rigid movement of the abdomen.
7. The method of claim 1 further comprising using RF pulses taking the form of at least one of hard pulses, shaped slice-selective pulses, MLEV composite pulses, adiabatic pulses, or any other equivalent pulses for excitation, refocusing, and restoring.
8. The method of claim 1 further comprising using signal conditioning and imaging data acquisition after using the T2 preparation module.
9. The method of claim 1 further comprising using the motion tracking element that comprises a projection.
10. The method of claim 9 further comprising inserting multiple projections along more than one axis.
11. The method of claim 1 further comprising using the motion tracking element comprising radial readouts.
12. The method of claim 1 further comprising using the motion tracking element taking the form of a motion-measurement readout.
13. The method of claim 1 further comprising using a magnetic resonance imaging machine to execute steps of the method.
14. The method of claim 1 further comprising executing steps of the method with a non-transitory computer readable medium.
15. The method of claim 13 further comprising using a computing device networked to the magnetic resonance imaging machine, the computing device being loaded with a non-transitory computer readable medium programmed with steps for executing the method.