Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5405593 | Journal of Magnetic Resonance | 2013 | 6 Pages |
Abstract
Multi-dimensional pulses are frequently used in MRI for applications such as targeted excitation, fat-water separation or metabolic imaging with hyperpolarised 13C compounds. For the design, the problem is typically separated into the different dimensions. In this work, a method to directly design two-dimensional pulses using the small-tip angle approximation is introduced based on a direct matrix representation. The numerical problem is solved in a single step directly in two dimensions by matrix inversion. Exemplary spectral-spatial excitation and spatio-temporal encoding (SPEN) pulses are designed and validated. The main benefits of the direct design approach include a reduction of artefacts in case of spectral-spatial pulses, a simple and straightforward computer implementation and high flexibility in the pulse design.
Keywords
Related Topics
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Chemistry
Physical and Theoretical Chemistry
Authors
Rolf F. Schulte, Florian Wiesinger,