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Optimized gradient waveforms for spiral scanning
Author(s) -
King Kevin F.,
K. F. Foo Thomas,
Crawford Carl R.
Publication year - 1995
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910340205
Subject(s) - waveform , spiral (railway) , amplitude , electromagnetic coil , physics , amplifier , nuclear magnetic resonance , computer science , acoustics , optics , mathematical analysis , mathematics , voltage , cmos , optoelectronics , quantum mechanics
Abstract Spiral scanning gradient waveforms can be optimized with respect to blurring from off‐resonance effects by minimizing the readout time. This is achieved by maximizing the gradient amplitude during the scan so that the edge of k ‐space is reached as quickly as possible. Gradient hardware constraints are incorporated by considering a circuit model for the gradient coil and amplifier. The optimized gradient waveforms are determined by a set of coupled differential equations. The resulting solutions have shorter readout time than solutions that do not consider the circuit model.