MRI of the Human Torso at 7 Tesla Using Dual Quadrature Patch Antennas.

Andrew Webb¹, Nadine Smith¹

Whole-body imaging at high magnetic fields presents a variety of engineering challenges arising mainly from the short wavelength of electromagnetic radiation in the human body. One successful solution has been to use multi-transmit arrays with the magnitude and phase of the driving signal to each array element under operator control. In this work we present an alternative and simple approach which uses two large patch antennas, both driven in quadrature, which essentially form a large distributed microstrip. Using this hardware configuration, homogenous low-tip angle gradient echo images can be acquired through the abdomen and cardiac regions of the body.