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

作者：Perrier Anne Laure^*; Goebel Jean Christophe; Pinzano Watrin Astrid; Roeder Emilie; Gillet Pierre; Grenier Denis; Beuf Olivier

来源：IEEE Sensors Journal, 2013, 13(6): 2450-2458.

DOI：10.1109/JSEN.2013.2254894

• Four-channels nuclear magnetic resonance (NMR) surface coil array
• small animal magnetic resonance imaging (MRI)
• tunable device

In magnetic resonance imaging, multichannel coil arrays are increasingly being used to improve signal-to-noise ratio in order to increase spatial and/or temporal image resolution. A recent decoupling technique allows conception of two-channel surface transceiver coil arrays. This technique, based on a common conductor, does not require an 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 is developed and described in this paper. A four-channel surface receiver coil array is designed to perform the simultaneous acquisition of both rat knee joints at 7 T. Without the use of additional preamplifiers, a good decoupling between channels is obtained and very high spatial resolution 3-D images with a voxel size of 49 x 49 x 98 mu m(3) is achieved in 1 h 22 min scan time. Acquisitions allow the quantification of cartilage morphological parameters such as thickness and volume.

• 出版日期2013-6