Abstract
Magnetic resonance imaging (MRI) is a dual phase clinical diagnostic procedure based on nuclear magnetic resonance (NMR). In the transmission phase, the body protons are stimulated by an externally applied RF field. During the reception phase, the excited protons release RF signals which are used for imaging. The signal-to-noise ratio (SNR) of scanned images can be improved by enhancing the RF magnetic flux density. However, high strength of RF magnetic fields during excitation might cause tissue heating and inhomogeneous field distribution in the subject under scan. Selective enhancement of RF magnetic flux density solely during the imaging phase is required for averting tissue heating and image artifacts while maintaining high SNR. In order to facilitate this, we report a nonlinear metasurface which could act as a dynamic supplement to transceiver MRI coils for obtaining images with higher spatial resolution or faster acquisition while maintaining low specific absorption rate (SAR).
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
