Split-blade data collection for propeller MRI
AssigneeCatholic Healthcare West, California Nonprofit Benefit Corporation
InventorJames G. Pipe
Life of this patent
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Abstract
The present invention provides a system and method of MR imaging particularly applicable with fast spin echo protocols. Odd and even echoes are used to create separate blades or strips in k-space. Preferably, each blade extends through the center of k-space. The blades are incrementally rotated about the center of k-space with each echo train until a full set of k-space data is acquired. After a phase correction, each odd and even blade is combined into a single k-space data set that is used for image reconstruction.
Claims19
A method of MR imaging comprising the steps of:
- for an echo train, splitting MR data acquisition into an odd and an even echo acquisition blade;
- for a subsequent echo train, rotating the odd and the even acquisition blades of data acquisition with respect to a previous acquisition and rotating the odd and the even acquisition blades with respect to a center of k-space;
- and
- reconstructing an image from the aquisition blades.
An MRI apparatus comprising:
- a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet to impress a polarizing magnetic field and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images;
- and
- a computer programmed to:
- segment acquisition of an echo train into at least first and second sections, wherein the at least first and second sections extend through a common reference point;
- acquire a segment of MR data;
- for a subsequent echo train, segment acquisition into the at least first and second sections and rotate the at least first and second sections a prescribed interval about the common reference point;
- and
- reconstruct an image from the at least first and second sections.
A computer readable storage medium having stored thereon a computer program comprising instructions which when executed by a computer cause the computer to:
- for an echo train, segment data acquisition into an odd data acquisition and an even data acquisition;
- associate a strip of k-space extending through a center of k-space for the even data acquisition and a strip of k-space extending through the center of k-space for the odd data acquisition;
- rotate the strips of k-space for acquisition from a subsequent echo train;
- and
- acquire data from the subsequent echo train for the rotated strips of k-space.
Dependencies are inferred from the claim text.