US 2019/0195970 A1 · A TRANSMIT/RECEIVE RADIO FREQUENCY (RF) SYSTEM FOR A MAGNETIC RESONANCE EXAMINATION SYSTEM AND METHOD THEREOF

Abstract

The invention provides a transmit/receive RF system for a magnetic resonance examination system. The transmit/receive RF system comprises an RF antenna, an RF power amplifier configured to supply electrical RF power to the RF antenna, a coupling device coupled between the RF power amplifier and the RF antenna and configured to couple out fractions of a reflected power flowing from the RF antenna toward the RF power amplifier and a forward power flowing from the RF power amplifier toward the RF antenna to output a first coupled signal VREV and a second coupled signal VFWD, a wave detector coupled to the coupling device and configured to detect amplitude and phase information of the first coupled signal VREV and the second coupled signal VFWD, and a parameter calculator coupled to the wave detector and configured to calculate an operational parameter of the RF power amplifier based on complex scattering parameters of the coupling device and the detected amplitude and phase information of the first coupled signal VREV and second coupled signal VFWD.

Claims14

Dependent claims

A transmit/receive radio frequency (RF) system for a magnetic resonance examination system comprising:

an RF antenna;
an RF power amplifier configured to supply electrical RF power to the RF antenna;
and
a coupling device coupled between the RF power amplifier and the RF antenna and configured to couple out fractions of a reflected power flowing from the RF antenna toward the RF power amplifier and a forward power flowing from the RF power amplifier toward the RF antenna to output a first coupled signal VREV and a second coupled signal VFWD;
a wave detector coupled to the coupling device and configured to detect amplitude and phase information of the first coupled signal VREV and the second coupled signal VFWD;
and
a parameter calculator coupled to the wave detector and configured to calculate an operational parameter of the RF power amplifier based on complex scattering parameters of the coupling device and the detected amplitude and phase information of the first coupled signal VREV and second coupled signal VFWD.

4 more elements

A method for determining an operational parameter of an RF power amplifier in a transmit/receive radio frequency (RF) system for a magnetic resonance examination system, the method comprising:

receiving a first coupled signal VREV comprising a first coupled-out fraction of a reflected power flowing from the RF power amplifier toward an RF antenna and a second coupled-out fraction of the forward power flowing from the RF antenna toward the RF power amplifier via a coupling device coupled between the RF power amplifier and the RF antenna, wherein the first coupled signal VREV is a first complex value containing amplitude and phase information;
receiving a second coupled signal VFWD comprising a third coupled-out fraction of the forward power and a fourth coupled-out fraction of the reflected power via the coupling device, wherein the second coupled signal VFWD is a second complex value containing amplitude and phase information;
and
calculating the operational parameter of the RF power amplifier as a complex-valued function of complex scattering parameters of the coupling device, the first coupled signal VREV and the second coupled signal VFWD.

1 more element

Dependencies are inferred from the claim text.

A transmit/receive radio frequency (rf) system for a magnetic resonance examination system and method thereof

Life of this patent

A transmit/receive radio frequency (rf) system for a magnetic resonance examination system and method thereof

Life of this patent

Abstract

Claims14