Phase matched RF pulse design for imaging a reduced field of excitation with a fast TSE acquisition

A method is described to design parallel transmit (PTX) excitation pulses that are compatible with turbo spin echo (TSE) sequences, based on information available from conventional per-channel B1+ mapping. The excitation phase of PTX pulses that generate a reduced field of excitation (rFOX) is matched to the phase the quadrature mode of a PTX coil. This enables TSE imaging of a PTX-enabled rFOX excitation combined with standard nonselective refocusing pulses transmitted in the quadrature mode. In-vivo imaging experiments were performed at 7T using a dual channel parallel transmit head coil.

Source: Magnetic Resonance Imaging - May 7, 2018 Category: Radiology Authors: Ronald Mooiweer, Alessandro Sbrizzi, Alexander J.E. Raaijmakers, Cornelis A.T. van den Berg, Peter R. Luijten, Hans Hoogduin Source Type: research