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Sodium-MRI using a density adapted 3D Radial Acquistion Technique

A. Nagel, F. Laun, M. Weber, C. Matthies, W. Semmler and L. Schad

Proceedings 17th Scientific Meeting, International Society for Magnetic Resonance in Medicine, Honolulu,, p.256

A density adapted 3D radial projection reconstruction pulse sequence (DA-3DPR) is presented that provides a more efficient k-space sampling than conventional 3D projection reconstruction sequences (3DPR). The gradients of the DA-3DPR sequence are designed such that the averaged sampling density in each spherical shell of k-space is constant. Benefits for low SNR applications are demonstrated with the example of sodium imaging. In simulations of the point-spread function, the SNR is increased by the factor 1.66. Using analytical and experimental phantoms, it is shown that the DA-3DPR sequence allows higher resolutions and is more robust in the presence of B0-inhomogeneities.

Contact: Prof. Dr. Frank Zöllner last modified: 21.09.2020
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