Mr imaging with an rf pulse producing reduced magnetization transfer
AssigneeCatholic Healthcare West, California Nonprofit Public Benefit Corporation
InventorJames Grant Pipe
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Abstract
A system and method are provided herein for designing and transmitting RF pulses which cause a reduced off-resonance magnetization transfer saturation. An RF pulse shape may be optimized according to a set of Bloch solutions defining a desired magnetization profile. An RF pulse may be transmitted according to this optimized shape according to a k-space trajectory which traverses a high amplitude portion of the RF pulse more times than one or more low amplitude portions. In addition, a generally alternating slice select gradient may be applied during transmission of the RF pulse.
Claims11
A computer readable storage medium having a set of instructions stored thereon which, when executed by a computer, causes the computer to:
- determine a desired k-space trajectory to repeatedly traverse at least a portion of an RF pulse profile;
- iteratively optimize the RF pulse profile to minimize magnetization transfer caused thereby;
- and
- output the iteratively optimized RF pulse profile for transmission in an RF scan sequence in order to acquire an MR image of a scan subject.
Dependencies are inferred from the claim text.