A Volume Head Array with 8 Transmit / Receive Channels for 7 T
Weisser A, Lanz T
RAPID Biomedical GmbH
An 8 channel volume array for the human head was developed. The 8 coil elements are used for circular polarized transmission as well as for signal reception. The array includes preamplifiers, transmit-receive switches, phase shifters and power splitters. The array elements are arranged in a slightly elliptical manner for adaptation to an average human head shape. This enables roughly uniform loading conditions for each element. For the elements a rectangular loop design was chosen with the loop areas facing the sample to minimize excitation of dielectric resonances compared to other designs (e.g. TEM).