Elke Hattingen1, Ulf Ziemann2, Jrg Magerkurth1, Mathias Wahl2, Ulrich Pilatus1
1Institute of Neuroradiology, Goethe University Frankfurt/Main, Frankfurt, Germany; 2Klinik fr Neurologie, Goethe University Frankfurt/Main, Frankfurt, Germany
Combined 1H and 31P MRSI was employed to evaluate the contribution of phosphorylated compounds to the well known increase in total choline (tCho) and total creatine (tCr) in MS. No change in the ratio of PCr/tCr was observed, indicating that increased tCr is not related to changes in energy metabolism but rather indicates gliosis. The significant tCho increase was mainly due to tCho components not visible by 31P MRS. The origin of this residual choline fraction remains to be investigated.