Additive angle method for fast large-tip-angle RF pulse design in parallel excitation
نویسندگان
چکیده
منابع مشابه
Additive angle method for fast large-tip-angle RF pulse design in parallel excitation.
Current methods for parallel excitation RF pulse design are based on the small-tip-angle approximation, which provides a computationally efficient means of pulse calculation. In general, pulses designed with those methods are inaccurate when scaled to produce large-tip angles, and methods for large-tip-angle pulse design are more computationally demanding. This paper introduces a fast iterative...
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Introduction The optimal control method [1,2] is among existing techniques for large-tip-angle RF pulse design in parallel excitation [1,3-5]. Optimal control has some advantages over other methods; it is robust, it applies to general excitation trajectories, and it provides control over the excited phase pattern. However, it requires long computation times, rendering it unsuitable for online p...
متن کاملMagnetic Resonance in Medicine 59:779–787 (2008) Additive Angle Method for Fast Large-Tip-Angle RF Pulse Design in Parallel Excitation
Current methods for parallel excitation RF pulse design are based on the small-tip-angle approximation, which provides a computationally efficient means of pulse calculation. In general, pulses designed with those methods are inaccurate when scaled to produce large-tip angles, and methods for large-tipangle pulse design are more computationally demanding. This paper introduces a fast iterative ...
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Introduction: Designing RF pulses in parallel excitation (PTX) using the linear small-tip-angle approximation [1-3] produces distorted excitation patterns at large tip angles due to the nonlinear nature of the Bloch equation. Grissom et al [4] proposed the ‘Additive Angle’ (AA) method for large-tip-angle RF pulse as a means to improve upon the small-tip-angle approximation (STA). This iterative...
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W. A. Grissom, A. B. Kerr, P. P. Stang, G. C. Scott, I. Hancu, M. W. Vogel, and J. M. Pauly Electrical Engineering and Radiology, Stanford University, Stanford, CA, United States, Stanford University, Stanford, CA, United States, Electrical Engineering, Stanford University, Stanford, CA, United States, GE Global Research, Niskayuna, NY, United States, Advanced Medical Applications Laboratory, G...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2008
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.21510