Abstract #3464

Improving cartesian single-shot 2D T2 shuffling and reducing radial streaking artifacts with golden angle radial T2 shuffling

Yamin Arefeen¹, Fei Han², Borjan Gagoski^3,4, Jacob White¹, and Elfar Adalsteinsson^1,5,6

¹Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States, ²MR R&D and Collaborations, Siemens Healthineers, Los Angeles, CA, United States, ³Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children’s Hospital, Boston, MA, United States, ⁴Harvard Medical School, Boston, MA, United States, ⁵Harvard-MIT Health Sciences and Technology, Cambridge, MA, United States, ⁶Institute for Medical Engineering and Science, Cambridge, MA, United States

T₂ shuffling reduces blurring in 3D Fast Spin Echo (FSE) by incorporating a low rank representation of signal evolution in the forward model. However, extending T₂ shuffling to 2D-FSE is challenging due to the limited spatiotemporal incoherence achievable with cartesian sampling. Radial trajectories offer increased incoherence in multiple dimensions in comparison to cartesian acquisitions. We combine golden angle radial sampling with the T₂shuffling forward model to improve image quality in comparison to 2D cartesian T₂ shuffling and to reduce streaking artifacts in radial single-shot FSE images. Simulation and phantom experiments illustrate the advantages of radial T₂ shuffling.

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