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Abstract #4207

Promoting incoherence of radial x-f point spread functions using randomly perturbed golden angles

Mark Chiew1, Nadine N Graedel1, and Karla L Miller1

1FMRIB Centre, University of Oxford, Oxford, United Kingdom

In this work we propose a simple method for increasing the spatio-temporal incoherence of a golden angle radial time-series acquisition by mildly perturbing the golden angles with a random variable. Despite its quasi-random distribution of golden angle samples, x-f point spread function analysis reveals strong coherence along the frequency domain. When the golden angles are slightly jittered using a normal random variable with small variance, the x-f point spread functions take on a more diffuse, noise-like appearance, making the acquisition scheme more appropriate for k-t reconstruction methods relying on incoherence, while maintaining its favourable spatial properties.

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