Abstract #4320

A bent dipole antenna and 4-channel loop array for 1H/31P brain application at 3 T MRI

Suk-Min Hong¹, Chang-Hoon Choi¹, Jörg Felder¹, Arthur W. Magill^1,2, and N. Jon Shah^1,3

¹Institute of Neuroscience and Medicine - 4 Medical Imaging Physics Forschungszentrum Juelich GmbH, Juelich, Germany, ²Current Address: Medical Physics in Radiology, German Cancer Research Centre (DKFZ), Heidelberg, Germany, ³Department of Neurology, Faculty of Medicine, RWTH Aachen University, JARA, Aachen, Germany

A dipole antenna achieves good isolation from a loop coil when it is located over the centre of a loop coil. Such an arrangement can be used as a dual-tuned coil, by tuning the dipole and the loop to the ¹H and X frequencies, respectively. At 3 T, however, the length of a dipole antenna is too long to be of use for brain applications. In this study, we bent the dipole antenna around the head to overcome the length problem. We then evaluated the feasibility of combining two dipole antennae and a 4-loop array for ¹H/³¹P application.

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