Improvement in B1+ Homogeneity and Average Flip Angle Using Dual-Source Parallel RF Excitation for Cardiac MRI in Swine Hearts
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چکیده
منابع مشابه
Improvement in B1+ Homogeneity and Average Flip Angle Using Dual-Source Parallel RF Excitation for Cardiac MRI in Swine Hearts
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 significantly lower than desired, potentially leading to image artifacts and biased quantitative me...
متن کاملImprovement in B1+-homogeneity of 3T cardiac MRI in swine with dual-source parallel RF excitation
Background Conventional MRI scanners up to a magnetic field strength of 3T use an integrated birdcage quadrature coil to generate a radio frequency (RF) excitation field (B1+). At 3T, Sung et al. observed a flip angle variation ranging from 31 to 66% over the entire left ventricle (LV) in humans as well as a flip-angle distribution from 34° to 63, for a nominal flip angle of 60°. This not only ...
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ACKNOWLEDGEMENTS I have many people to thank. First, I would like to thank Doug Noll, for taking me on as a student five years ago. He is the best mentor I have ever had, and I look up to him as a model of what an engineer should be. He is creative, open-minded, friendly and excited about his work. I was blessed to have him as an advisor, and I am excited to be working in a field with people li...
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K. Setsompop, A. C. Zelinski, V. A. Alagappan, U. J. Fontius, F. Hebrank, F. Schmitt, L. L. Wald, and E. Adalsteinsson EECS, Massachusetts Institute of Technology, Cambridge, MA, United States, A. A. Martinos Center for Biomedical Imaging, MGH, Harvard Medical School, Charlestown, MA, United States, Siemens Medical Solutions, Erlangen, Germany, Siemens Medical Solutions, Charlestown, MA, United...
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ژورنال
عنوان ژورنال: PLOS ONE
سال: 2015
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0139859