Trade-off between preamplifier noise figure and decoupling in MRI detectors.

ABSTRACT:

Purpose

There is a limit to the maximum achievable preamplifier decoupling. In many cases, this level is not enough. To overcome this limit, the preamplifier noise figure can be compromised for further decoupling increase. This is useful in flexible MRI arrays where ensuring coil insensitivity to changes in other array elements is a challenge.

Methods

This work establishes the relation between the preamplifier noise figure and preamplifier decoupling using closed-form equations. These equations allow the evaluation of preamplifier decoupling properties and benchmark different preamplifiers against each other. The method to design the corresponding decoupling networks is described. The derived generalized design equations, which are not limited to 50 Ω pre-matched preamplifie

SUBMITTER: Wang W 

PROVIDER: S-EPMC10092476 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature