A spiral-based volumetric acquisition for MR temperature imaging.

ABSTRACT:

Purpose

To develop a rapid pulse sequence for volumetric MR thermometry.

Methods

Simulations were carried out to assess temperature deviation, focal spot distortion/blurring, and focal spot shift across a range of readout durations and maximum temperatures for Cartesian, spiral-out, and retraced spiral-in/out (RIO) trajectories. The RIO trajectory was applied for stack-of-spirals 3D imaging on a real-time imaging platform and preliminary evaluation was carried out compared to a standard 2D sequence in vivo using a swine brain model, comparing maximum and mean temperatures measured between the two methods, as well as the temporal standard deviation measured by the two methods.

Results

In simulations, low-bandwidth Cartesian trajectories showed substantial shift of the

SUBMITTER: Fielden SW 

PROVIDER: S-EPMC6377207 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature