Non-Cartesian balanced steady-state free precession pulse sequences for real-time cardiac MRI.

ABSTRACT:

Purpose

To develop a new spiral-in/out balanced steady-state free precession (bSSFP) pulse sequence for real-time cardiac MRI and compare it with radial and spiral-out techniques.

Methods

Non-Cartesian sampling strategies are efficient and robust to motion and thus have important advantages for real-time bSSFP cine imaging. This study describes a new symmetric spiral-in/out sequence with intrinsic gradient moment compensation and SSFP refocusing at TE = TR/2. In vivo real-time cardiac imaging studies were performed to compare radial, spiral-out, and spiral-in/out bSSFP pulse sequences. Furthermore, phase-based fat/water separation taking advantage of the refocusing mechanism of the spiral-in/out bSSFP sequence was also studied.

Results

The image quality of the spiral-

SUBMITTER: Feng X 

PROVIDER: S-EPMC4637255 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature