Introduction of the snake antenna array: Geometry optimization of a sinusoidal dipole antenna for 10.5T body imaging with lower peak SAR.

ABSTRACT:

Purpose

To improve imaging performance for body MRI with a local transmit array at 10.5T, the geometry of a dipole antenna was optimized to achieve lower peak specific absorption rate (SAR) levels and a more uniform transmit profile.

Methods

Electromagnetic simulations on a phantom were used to evaluate the SAR and B1+ -performance of different dipole antenna geometries. The best performing antenna (the snake antenna) was simulated on human models in a 12-channel array configuration for safety assessment and for comparison to a previous antenna design. This 12-channel array was constructed after which electromagnetic simulations were validated by B1+ -maps and temperature measurements. After obtaining approval by the Food and Drug Administration to scan with the snake antenn

SUBMITTER: Steensma B 

PROVIDER: S-EPMC7496175 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature