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The slice selection gradients, as well as the phase and frequency, in MRI imaging are traditionally represented by on/off box or rectangular symbols:

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or

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My question is what is the mathematical name for these functions - it would be the equivalent of multiple rectangle functions, periodic or not. For example:

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or

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Antoni Parellada
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1 Answers1

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They are usually simply called trapezoidal waveforms or trapezoidal gradients. The vertical edges are not possible, the maximum change in gradient strength with respect to time (dG/dt) is called the slew rate. In modern MRI systems it is on the order of 200 mT/m/ms

Dale
  • 117,350