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Design of a Four-Channel Surface Receiver Coil Array Without Preamplifiers for the Decoupling Between Elements: Validation for High-Resolution Rat Knee MR Imaging

Abstract : In Magnetic Resonance Imaging (MRI), multi-channel coil arrays are increasingly being used to improve Signal-to-Noise Ratio (SNR) in order to increase spatial and/or temporal image resolution. Recent decoupling technique allows conception of two-channel surface transceiver coil arrays; this technique based on common conductor does not require additional preamplifier for the decoupling between elements. In this case the coil array loops are directly connected to the independent transmit/receive switches and preamplifiers of the MR system. Using this common conductor decoupling technique, a topology of a four-channel coil array was developed and described in this paper. A four-channel surface receiver coil array was designed to perform the simultaneous acquisition of both rat knee joints at 7T. Without the use of additional preamplifiers, a good decoupling between channels was obtained and very high spatial resolution 3D images with a voxel size of 49 × 49 × 98 µm 3 were achieved in 1h22min scan time. Acquisitions allowed the quantification of cartilage morphological parameters such as thickness and volume
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Anne-Laure Perrier, Jean-Christophe Goebel, Astrid Pinzano-Watrin, Émilie Roeder, Pierre Gillet, et al.. Design of a Four-Channel Surface Receiver Coil Array Without Preamplifiers for the Decoupling Between Elements: Validation for High-Resolution Rat Knee MR Imaging. IEEE Sensors Journal, Institute of Electrical and Electronics Engineers, 2013, 13 (6), pp.2450-2458. ⟨10.1109/JSEN.2013.2254894⟩. ⟨hal-01814440v2⟩

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