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Abstract #2729

Uniform Bilateral Breast MRI at 7T with Dual Transmit and 30-Channel Receive

Michel Italiaander1, Ingmar Voogt1, Irene van Kalleveen1, Bertine L. Stehouwer1, Tijl van der Velde1, Peter R. Luijten1, Vincent Oltman Boer2, Dennis W.J. Klomp1

1UMC Utrecht, Utrecht, Netherlands; 2University Medical Center Utrecht, Utrecht, Netherlands

In the detection of breast cancer strong T1 weighting in contrast-enhanced MRI is essential, requiring a high density of strong flip angles, that generally will be limited due to SAR constrains particularly at 7 Tesla. Therefore we propose the use of efficient quadrature surface arrays to maximize contrast-enhanced MRI efficiency at 7 Tesla in the breast (bilateral). With B1 compensating RF pulses in one dimension and B1 shimming in the second dimension uniform flip angles can be obtained. Combined with 30 receivers, we demonstrate uniform and strong T1 weighting in a volunteer and in a patient with breast cancer.

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Keywords

adjust agent amplitude applied arrays assessment bilateral boxes breast breasts cancer channel channels circle coil coils coincides combined compensating compromising contrast control cycles decoupled degrees density deposition designs detailed detecting detection dimension dimensional distribution driven dual duty efficient elements enables enabling enhanced equal equipped extension fields gadolinium healthy improve independent inductively infused injection interfaced kinetic likewise local maintain maintains mapping merged morphologic note orthogonal overview patient peter power preamplifier prior pulse pulses quadrature receive receiver receivers receiving reducing resolution schematic setup shimming spatial specificity steering still strong subsequent superb suppression surface system temporal transmit transmitters transmitting ultra uniform unilateral validated versus volunteer