RF TRANSMITTER WITH DIGITAL FEEDBACK FOR MRI
First Claim
1. A method for generating RF transmit signals by means of an RF transmit system for feeding an RF transmitter, comprising the following steps:
- detecting an RF transmit signal which is generated at an output of the RF transmit system or at the RF transmitter,converting the detected RF transmit signal into a digital signal,evaluating a difference or error between the digitized detected RF transmit signal and a demand RF signal which is supplied to the RF transmit system or generated by the RF transmit system,digitally adjusting the demand RF signal such that the difference or error is at least minimized or removed such that the RF transmit signal is at least substantially equal to or corresponds or correlates with the demand signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and an RF transmit system for generating RF transmit signals for feeding an RF transmitter (14) in the form of, or comprising, one or more antenna device(s), coil(s), coil elements, or coil array(s) is disclosed. Furthermore, a multi-channel RF transmit system for feeding a plurality of such RF transmitters, especially for use as an RF excitation system in a magnetic resonance imaging (MRI) system for exciting nuclear magnetic resonances (NMR) is disclosed. A demand RF transmit signal is compared in the digital domain with an RF transmit signal and digitally corrected with respect to differences or errors between both by means of a complex predistorter (11), an adaption unit (17) and a look-up table unit (18).
-
Citations
10 Claims
-
1. A method for generating RF transmit signals by means of an RF transmit system for feeding an RF transmitter, comprising the following steps:
-
detecting an RF transmit signal which is generated at an output of the RF transmit system or at the RF transmitter, converting the detected RF transmit signal into a digital signal, evaluating a difference or error between the digitized detected RF transmit signal and a demand RF signal which is supplied to the RF transmit system or generated by the RF transmit system, digitally adjusting the demand RF signal such that the difference or error is at least minimized or removed such that the RF transmit signal is at least substantially equal to or corresponds or correlates with the demand signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification