Accelerating spin-echo EPI through combined patterned multislice excitation and simultaneous multislice acquisition.

ABSTRACT:

Purpose

To demonstrate further acceleration of spin echo MRI by combining the simultaneous multi-slice approach with the recently introduced patterned multislice excitation (PME) technique and evaluate application for rapid diffusion-weighted MRI.

Theory and methods

Implementation at 3T involved the design of RF pulses simultaneously acting on four separate slices within hardware limits on peak amplitude. This was accomplished by time-shifted sub-pulses and a dedicated switching scheme of the slice-select gradient. The new technique was evaluated on two clinical MRI systems with differing maximum gradient strength.

Results

Four-fold acceleration was successfully achieved by combining PME with rate-2 SMS. Within fixed measurement time, the proposed approach allows incr

SUBMITTER: Zhou J 

PROVIDER: S-EPMC11971492 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature