Loading patent…
AssigneeThe Regents of the University of Michigan
InventorsJon-Fredrik Nielsen, Daehyun Yoon, Douglas C. Noll
Estimating the term…
A method of acquiring image data with an MRI system from an object using a sequence of tip-down and tip-up RF pulses is described. A slice-selective first pulse α rotates the in-slice spins from the longitudinal axis (z) toward a transverse plane (x, y). Image data is acquired from the in-slice spins during a free precession interval (Tfree) in which the in-slice spins precess along the transverse plane (x, y). A spatially tailored, non-slice-selective second pulse β({right arrow over (r)}) is applied for rotating the in-slice spins from the transverse plane (x, y) to at least substantially along the longitudinal axis (z). A third pulse S may be applied to the in-slice and out-of-slice spins to eliminate (spoil) residual transverse signal from out-of-slice spins.
A method of acquiring image data with an MRI system from an object according to a plurality of slices, with the object including a plurality of in-slice spins within each respective slice and a plurality of out-of-slice spins outside each respective slice, said method comprising the steps of:
An MRI system configured to acquire image data from an object according to a plurality of slices, with the object including a plurality of in-slice spins within each respective slice and a plurality of out-of-slice spins outside each respective slice, and with the MRI system configured to acquire a B0 map from the object to determine magnetization characteristics of the in-slice spins, said MRI system comprising:
Dependencies are inferred from the claim text.