Keywords: Quantitative Imaging, Relaxometry, radial sampling
Quantitative MRI protocols can benefit from radial trajectory sampling to reduce the acquisition time. However we identified a bias in T2 relaxometry studies conducted with radial imaging. After in-depth analysis aiming at further our understanding of the underlying mechanisms, we propose some guidelines to mitigate this bias. The error depends on the range of T2 present in the object of interest and its geometry, the number of spokes and the trajectory of the sequence. Parallel imaging and compressed sensing help reducing the bias.
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