Improvement in B1+ Homogeneity and Average Flip Angle Using Dual-Source Parallel RF Excitation for Cardiac MRI in Swine Hearts

• Published in: PloS one Vol. 10; no. 10; p. e0139859
• Main Authors: Schär, Michael, Ding, Haiyan, Herzka, Daniel A.
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 05.10.2015; Public Library of Science (PLoS)
• Subjects: Animals; Biomedical engineering; Calibration; Catheter Ablation; Coefficient of variation; Correlation; Excitation; Field strength; Heart; Heart attacks; Heart diseases; Homogeneity; Human subjects; Image Enhancement - methods; Image transmission; Inhomogeneity; Livestock; Magnetic fields; Magnetic resonance imaging; Magnetic Resonance Imaging - methods; Myocardial Infarction - pathology; Myocardium - pathology; NMR; Nuclear magnetic resonance; Patients; Phase shift; Radio frequency; Radio Waves; Studies; Swine; United States > US; Maryland; Baltimore Maryland

Cardiac MRI may benefit from increased polarization at high magnetic field strength of 3 Tesla but is challenged by increased field inhomogeneity. Initial human studies have shown that the radiofrequency (RF) excitation field (B1+) used for signal excitation in the heart is both inhomogeneous and si...