2D sense for faster 3D MRI |
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Authors: | Markus Weiger Klaas P Pruessmann Peter Boesiger |
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Affiliation: | (1) Institute for Biomedical Engineering, University of Zurich and Swiss Federal Institute of Technology Zurich, Gloriastrasse 35, CH-8092 Zurich, Switzerland |
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Abstract: | Sensitivity encoding in two spatial dimensions (2D SENSE) with a receiver coil array is discussed as a means of improving
the encoding efficiency of three-dimensional (3D) Fourier MRI. it is shown that in Fourier imaging with two phase encoding
directions, 2D SENSE has key advantages over one-dimensional parallel imaging approaches. By exploiting two dimensions for
hybrid encoding, the conditioning of the reconstruction problem can be considerably improved, resulting in superior signal-to-noise
behavior. As a consequence, 2D SENSE permits greater scan time reduction, which particularly benefits the inherently time-consuming
3D techniques.
Along with the principles of 2D SENSE imaging, the properties of the technique are discussed and investigated by means of
simulations. Special attention is given to the role of the coil configuration, yielding practical setups with four and six
coils. The in vivo feasibility of the two-dimensional approach is demonstrated for 3D head imaging, permitting four-fold scan
time reduction.
Presented in parts at the 16th meeting of the ESMRMB, Sevilla, September, 1999. |
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Keywords: | Sensitivity encoding 2D SENSE Fast 3D MRI |
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