Effectiveness of 32-element Surface Coil Array for Accelerated Volume-Targeted Breath-Hold Coronary MRA.
- Author:
Hyun Yeol LEE
1
;
Jin Suck SUH
;
Jaeseok PARK
Author Information
1. Department of Medical Science, Yonsei University, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Magnetic resonance imaging (MRI);
Coronary magnetic resonance angiography;
Parallel imaging;
Geometry factor
- MeSH:
Acceleration;
Artifacts;
Coronary Vessels;
Magnetic Resonance Angiography;
Noise;
Orientation
- From:Journal of the Korean Society of Magnetic Resonance in Medicine
2009;13(2):137-145
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: To compare 12 and 32-element surface coil arrays for highly accelerated coronary magnetic resonance angiography (MRA) using parallel imaging. MATERIALS AND METHODS: Steady state free precession coronary MRA was performed in 5 healthy volunteers at 1.5 T whole body MR scanner using both 12 and 32-element surface coil arrays. Left anterior descending and right coronary artery data sets were acquired for each volunteer. Data sets were sub-sampled for parallel imaging using reduction factors from 1 to 6. Mean geometry factor (g-factor), maximum g-factor, and artifact level were calculated for each of the two coil arrays. RESULTS: Over all reduction factors, the mean and maximum g-factors and artifact level were significantly reduced using the 32-element array compared to the 12-element array (P << 0.1). The mean g-factor was sensitive to the imaging orientations of coronary arteries while the maximum g-factor and artifact level were independent of orientation. CONCLUSION: The 32-element surface coil array significantly improves artifact and noise suppression for highly accelerated coronary MRA using parallel imaging. The increased acceleration factors made feasible with the 32-element array offer the potential to enhance spatial resolution or increase volumetric coverage for 3D coronary MRA.
