Combination of a radial sequence for in vivo DTI of articular cartialge with an iterative model-based reconstruction

We combine of a radial spin echo diffusion tensor imaging (RAISED) sequence for DTI of articular cartilage with a model-based iterative reconstruction, which directly calculates the diffusion tensor without reconstructing the intermediate diffusion-weighted images. This adds flexibility to the data acquisition. Purpose of this work was to assess value of different acquisition strategies for a model-based reconstruction. We tested four protocols with different resolutions, b-values and acquisitions times. We compared our model-based approach with the standard gridding reconstruction. We found improvement of the DTI parameters with the model based reconstruction and identify an optimal protocol for RAISED.

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