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Abstract #3791

Shortened Quarter Lambda Antenna for Traveling Wave Excitation in High Field MRI

Hugo Kroeze1,2, Anna Andreychenko3, Cornelis A.T. van den Berg3, Dennis W.J. Klomp1, Peter R. Luijten1

1Radiology, UMC Utrecht, Utrecht, Netherlands; 2Medical Technology, UMC Utrecht, Utrecht, Netherlands; 3Radiotherapy, UMC Utrecht, Utrecht, Netherlands

A patch antenna can be used for travelling wave excitation in high field MRI. Due to its size, this antenna has to be placed at the far end of the bore, reducing it efficiency when imaging in the abdominal area. A Shortened Quarter Lambda antenna is proposed to overcome this problem. By placing the SQL antenna between the lags of the patient, an 8 fold improved efficiency can be demonstrated in the abdomen, compared to a patch antenna. Images of the prostate and the head of a healthy volunteer are presented.