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Abstract #0292

High-Speed, High-Resolution Whole-Head Sparse Contrast-Enhanced MR Angiography

Aurelien F Stalder 1 , Harald H Quick 2,3 , Michael O Zenge 4 , Peter Schmitt 1 , Qiu Wang 5 , Marc Schlamann 6 , Stefan Maderwald 2 , Mariappan Nadar 5 , and Michaela Schmidt 1

1 Siemens Healthcare, Erlangen, Germany, 2 Erwin L. Hahn Institute for MR Imaging, University of Duisburg-Essen, Germany, 3 High Field and Hybrid MR Imaging, University Hospital Essen, Germany, 4 Siemens Healthcare, NY, United States, 5 Imaging and Computer Vision, Siemens Corporate Technology, NJ, United States, 6 Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Germany

Asymptotic incoherence and sparsity that can be obtained with large matrix sizes have been shown to play a key role in sparse data sampling. Based on this, a sequence and reconstruction prototype for high-resolution CEMRA was implemented on a standard clinical scanner. Whole head CEMRA with isotropic 0.7 mm resolution in just 10 s acquisition time was performed in 10 patients. The shown excellent image quality with 30-fold undersampling demonstrates the potential of sparse CEMRA for faster acquisition and/or resolution enhancement and confirms the sparse sampling theory indicating the potential of sparse MRI for high-resolution imaging.

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