Method of effecting nuclear magnetic resonance experiments using Cartesian feedback



Cartesian feedback, as it is now known in the communications industry, was first mentioned in the context of magnetic resonance in 1989. This invention relates to a method of effecting nuclear magnetic resonance experiments using Cartesian feedback while maintaining an acceptable ratio of signal to noise.

Technology transfer

This technology is available for licensing, or for further development through a collaborative research agreement with NRC. The business opportunity may be referred to by its NRC ID: 11532

Market applications

This innovation is specifically for the health sector and its use of Magnetic resonance imaging (MRI) machines and Magnetic resonance spectroscopy (MRS) machines.

How it works

The use of Cartesian feedback is proposed to solve the problem of using an array of coils for the purposes of transmission in magnetic resonance imaging (MRI). It is shown through this invention that without loss of transmitter efficiency, highly effective impedance may be created in series with each coil in array by the use of Cartesian negative feedback. This technique is neither simple nor cheap but the cost of multiple transmitters is offset by the fact that individual power amplifiers need to generate much less power than a single main unit thus total expense becomes the same.


The technology provides more comprehensive and reliable measurements.


NRC file 11532:

Contact us

To inquire about this technology, please contact:

Claude Larose, Business Advisor
Telephone: 514-496-6173