Free-breathing radial imaging using a pilot-tone radiofrequency transmitter for detection of respiratory motion.

ABSTRACT:

Purpose

To describe an approach for detection of respiratory signals using a transmitted radiofrequency (RF) reference signal called Pilot-Tone (PT) and to use the PT signal for creation of motion-resolved images based on 3D stack-of-stars imaging under free-breathing conditions.

Methods

This work explores the use of a reference RF signal generated by a small RF transmitter, placed outside the MR bore. The reference signal is received in parallel to the MR signal during each readout. Because the received PT amplitude is modulated by the subject's breathing pattern, a respiratory signal can be obtained by detecting the strength of the received PT signal over time. The breathing-induced PT signal modulation can then be used for reconstructing motion-resolved images from free-b

SUBMITTER: Solomon E 

PROVIDER: S-EPMC7902348 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature