Contrast-optimal simultaneous multi-slice bSSFP cine cardiac imaging at 0.55 T.

ABSTRACT:

Purpose

To determine if contemporary 0.55 T MRI supports the use of contrast-optimal flip angles (FA) for simultaneous multi-slice (SMS) balanced SSFP (bSSFP) cardiac function assessment, which is impractical at conventional field strengths because of excessive SAR and/or banding artifacts.

Methods

Blipped-CAIPI bSSFP was combined with spiral sampling for ventricular function assessment at 0.55 T. Cine movies with single band and SMS factors of 2 and 3 (SMS 2 and 3), and FA ranging from 60° to 160°, were acquired in seven healthy volunteers. Left ventricular blood and myocardial signal intensity (SI) normalized by background noise and blood-myocardium contrast were measured and compared across acquisition settings.

Results

Myocardial SI was slightly higher in single b

SUBMITTER: Tian Y 

PROVIDER: S-EPMC9712243 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature