Nonuniform and multidimensional Shinnar-Le Roux RF pulse design method
نویسندگان
چکیده
منابع مشابه
Nonuniform and multidimensional Shinnar-Le Roux RF pulse design method.
The Shinnar-Le Roux (SLR) radiofrequency (RF) pulse design algorithm is widely used for designing slice-selective RF pulses due to its intuitiveness, optimality, and speed. SLR is limited, however, in that it is only capable of designing one-dimensional pulses played along constant gradients. We present a nonuniform SLR RF pulse design framework that extends most of the capabilities of classica...
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Introduction: Adiabatic pulses are a special class of RF pulses that provide B1-insensitive rotation of the magnetization. When utilizing adiabatic pulses, particularly at high magnetic fields, low-SAR pulse designs are highly desirable. In this work, we present a new, systematic method for designing high-bandwidth, low-peak-amplitude adiabatic pulses by using the Shinnar Le-Roux (SLR) algorith...
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A new mathematical treatment and algorithm for the design of |B1(+)|-selective RF excitation pulses is presented and validated. The algorithm is based on a rotated Shinnar-Le Roux pulse design algorithm, wherein the pulse's frequency modulation waveform is directly designed by the algorithm, and its amplitude and sign modulation waveform takes the place of the gradient field. A new pulse config...
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Introduction: The tagging pulses in Velocity Selective Arterial Spin Labelling (VSASL) [1] are purely Velocity-Selective (VS), rendering VSASL potentially resistant to transit delay effects and suitable for use in cases with slow blood flow. Many different approaches have been used to design VS pulses [1-4], including saturations and inversions. Here we propose a method to improve the velocity ...
متن کاملTwo dimensional Spatial Selective Shinnar Le Roux pulse design for arbitrary k-space trajectory
Introduction: The Shinnar Le Roux (SLR) method [1,2,3] has been widely used to design slice selection pulse and two-dimensional (2D) RF pulse on EPI trajectory [4] due to the advantage of allowing tradeoffs among the in-slice ripple, out-of-slice ripple and transition. In this work, the SLR method is extended to design 2D pulse on arbitrary k-space trajectory. Firstly, 2D filter coefficients ar...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2011
ISSN: 0740-3194
DOI: 10.1002/mrm.23269