Beat Pilot Tone (BPT): Simultaneous MRI and RF motion sensing at arbitrary frequencies.

ABSTRACT:

Purpose

To introduce a simple system exploitation with the potential to turn MRI scanners into general-purpose radiofrequency (RF) motion monitoring systems.

Methods

Inspired by Pilot Tone (PT), this work proposes Beat Pilot Tone (BPT), in which two or more RF tones at arbitrary frequencies are transmitted continuously during the scan. These tones create motion-modulated standing wave patterns that are sensed by the receiver coil array, incidentally mixed by intermodulation in the receiver chain, and digitized simultaneously with the MRI data. BPT can operate at almost any frequency as long as the intermodulation products lie within the bandwidth of the receivers. BPT's mechanism is explained in electromagnetic simulations and validated experimentally.

Results

Phantom

SUBMITTER: Anand S 

PROVIDER: S-EPMC11429784 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature