Respiration resolved imaging with continuous stable state 2D acquisition using linear frequency SWEEP.

ABSTRACT:

Purpose

To investigate the potential of continuous radiofrequency (RF) shifting (SWEEP) as a technique for creating densely sampled data while maintaining a stable signal state for dynamic imaging.

Methods

We present a method where a continuous stable state of magnetization is swept smoothly across the anatomy of interest, creating an efficient approach to dense multiple 2D slice imaging. This is achieved by introducing a linear frequency offset to successive RF pulses shifting the excited slice by a fraction of the slice thickness with each successive repeat times (TR). Simulations and in vivo imaging were performed to assess how this affects the measured signal. Free breathing, respiration resolved 4D volumes in fetal/placental imaging is explored as potential application

SUBMITTER: Jackson LH 

PROVIDER: S-EPMC6682494 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature