Improvement in B1+-homogeneity of 3T cardiac MRI in swine with dual-source parallel RF excitation
نویسندگان
چکیده
منابع مشابه
Improvement 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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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...
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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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A. C. Zelinski, L. L. Wald, K. Setsompop, V. Alagappan, B. A. Gagoski, F. Hebrank, U. Fontius, F. Schmitt, and E. Adalsteinsson Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States, Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, United States, A. A. Martinos C...
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Introduction: One of the major causes of image non-uniformity in MRI is due to the existence of non-homogeneity in RF receive and transmit. This can be the most effective source of error in quantitative studies in MRI imaging. Part of this non-homogeneity demonstrates the characteristics of RF coil and part of it is due to the interaction of RF field with the material being imaged...
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ژورنال
عنوان ژورنال: Journal of Cardiovascular Magnetic Resonance
سال: 2013
ISSN: 1532-429X
DOI: 10.1186/1532-429x-15-s1-w22