Mimicking focused ultrasound with a loop coil in acoustic radiation force imaging.

ABSTRACT:

Purpose

To enable development of MR-acoustic radiation force imaging (MR-ARFI) methods for targeting ultrasound in human subjects without the regulatory, acoustic, or hardware challenges associated with actual transcranial ultrasound setups.

Methods

MR-ARFI is a phase-contrast imaging method that measures focal tissue displacement produced by an ultrasound transducer, when the transducer is pulsed simultaneously with a motion encoding gradient. The ultrasound-induced focal phase shift can be mimicked with a small loop coil that is driven by a DC pulse to produce a resonance frequency offset at the same time as the ultrasound pulse in an MR-ARFI pulse sequence. A coil was designed and built for use in MR-ARFI. Its focus size was characterized, its field map was measured, and

SUBMITTER: Zarcone K 

PROVIDER: S-EPMC12501678 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature