Cardiac gating using scattering of an 8-channel parallel transmit coil at 7T.

ABSTRACT:

Purpose

To establish a cardiac signal from scattering matrix or scattering coefficient measurements made on a 7T 8-channel parallel transmit (pTx) system, and to evaluate its use for cardiac gating.

Methods

Measurements of the scattering matrix and scattering coefficients were acquired using a monitoring pulse sequence and during a standard cine acquisition, respectively. Postprocessing used an independent component analysis and gating feature identification. The effect of the phase of the excitation radiofrequency (RF) field ( B1+ shim) on the cardiac signal was simulated for multiple B1+ shim configurations, and cine images were reconstructed from both the scattering coefficients and electrocardiogram (ECG).

Results

The cardiac motion signal was successfully identif

SUBMITTER: Jaeschke SHF 

PROVIDER: S-EPMC5947608 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature