William Dominguez-Viqueira1,2, Marc Carias2, Giles E. Santyr2,3
1Imaging Laboratories, Robarts Research Institute, London, Ontario, Canada; 2Department of Medical Biophysics, University of Western Ontario, London, Ontario, Canada; 3Department of Medical Imaging, University of Western Ontario, London, Ontario, Canada
SNR at low magnetic field strength can be improved by reducing RF coil noise using Litz wire coils. In this work the number of turns was optimized for Litz wire coils for low field hyperpolarized noble gas imaging of rat lungs. The comparison was conducted at 0.866 MHz and 2.385 MHz corresponding to Larmor frequencies of 129Xe and 3He at 73.5 mT. The quality factors and the signal to noise ratio (SNR) for each coil at each frequency were measured. Results demonstrate the advantages of multiturn Litz wire coils obtaining up to 300% improvement compared to copper coils.