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Preliminary Results of 7-Channel Insertional pTx Array Coil for 3T MRI

Journal of Magnetics, Volume 22, Number 2, 30 Jun 2017, Pages 238-243
Yeun Chul Ryu * (Department of Radiological Science, Gachon University)
Abstract
In this research, we report the preliminary results of an insertional type parallel transmission (pTx) array that has 7-elements that are placed in the space above a patient table as a transmit (Tx) coil to give an RF transmission(B1+) field for the body object of a 3 Tesla (T) MRI system. In previous research, we have tried to compare the performances of different coil elements and array geometries for a pTx body image. Based on these results, we attempt to obtain a human image with the proposed pTx array. Through the simulation and experimental results, we introduce a possible structure of multi-channel Tx array and verify the utility of a multi-channel Tx body image using B1+ shimming. The insertional pTx array, combined with a receiver (Rx) array coil, provides
an enhanced B1+ field homogeneity in a large ROI image as a result of B1+ shimming applied over the full body size object. Through this research, we hope to determine the usefulness of the proposed insertional type RF coil combination for 3 T body imaging.
Keywords: parallel transmission; shimming; 7-channel transmission array; B1+ field; 3 Tesla
DOI: https://doi.org/10.4283/JMAG.2017.22.2.238
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