Field inhomogeneity may substantially affect hyperpolarised 129Xe rat head spectra
Kershaw J, Nakamura K, Kanno I, Wakai A, Kondoh Y
Akita Industry Promotion Foundation, Akita Research Institute of Brain and Blood Vessels
Recent results have uncovered inconsistencies in hyperpolarized 129Xe rat head spectra that seem to correspond to changes in the shimming. To investigate the homogeneity of the field in rat head and as a first step towards studying the possible effects inhomogeneity may have on the 129Xe dissolved phase spectrum, we have implemented a field-mapping algorithm. The results indicate that even with a supposedly well-shimmed state, there is a substantial variation in the field that may cause or contribute to anomalies in rat head spectra.