Multi-feed, loop-dipole combined dielectric resonator antenna arrays for human brain MRI at 7  T

DiscussionThis work provides novel insights into the rectangular DRA design for high field MRI and shows that the loop-only feed should be used instead of the dipole-only in transmit mode to achieve the highest B1+ and SAR efficiency, while the loop-dipole should be the best suited in receive mode to obtain the highest SNR in spherical samples of similar size and electrical properties as the human head.
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - Category: Materials Science Source Type: research