Apparatus for automatically testing and tuning radio frequency coil

摘要

In one embodiment, an apparatus for automatically testing and tuning a RF coil is provided. The apparatus comprises a digital frequency generator for generating a stimulus, the stimulus comprising a range of radio frequency signals having different frequencies, a radio frequency coupler configured for applying the stimulus to the RF coil so as to enable the RF coil to generate a reflected signal in response to the stimulus applied, a radio frequency detector for detecting the reflected signal and a signal processing unit for processing the reflected signal, so as to identify the tuned resonant frequency of the RF coil and further configured for calculating return loss at the RF coil based on the reflected signal.

主权项

1. An apparatus for automatically testing and tuning a RF coil, the apparatus comprising:
a digital frequency generator for generating a stimulus, the stimulus comprising a range of radio frequency signals having different frequencies, the range of frequency signals comprising a first limit and a second limit, the first limit being above a Larmor frequency for the RF coil and the second limit being below the Larmor frequency; a radio frequency coupler configured for applying the stimulus to the RF coil so as to enable the RF coil to generate a reflected signal in response to the stimulus applied; a radio frequency detector for detecting the reflected signal; and a signal processing unit for processing the reflected signal, so as to identify the tuned resonant frequency of the RF coil and further configured for calculating return loss at the RF coil based on the reflected signal, the tuned resonant frequency corresponding to the frequency at which the reflected signal is at a minimum.