%0 Journal Article %T Simultaneous characterization of tumor cellularity and the Warburg effect with PET, MRI and hyperpolarized 13C-MRSI %A Adam E. Hansen %A Andreas Kj£¿r %A Axel Haase %A Benedikt Feuerecker %A Christian Hundshammer %A Christoph A. M¨¹ller %A Franz Schilling %A Jan-Bernd H£¿vener %A Jorge Cabello %A Katja Steiger %A Markus Schwaiger %A Mathias Schillmaier %A Miriam Braeuer %A Steffen J. Glaser %A Stephan D¨¹wel %A Stephan G. Nekolla %A Wilko Weichert %J Theranostics %D 2018 %I Ivyspring International Publisher %R 10.7150/thno.25162 %X Modern oncology aims at patient-specific therapy approaches, which triggered the development of biomedical imaging techniques to synergistically address tumor biology at the cellular and molecular level. PET/MR is a new hybrid modality that allows acquisition of high-resolution anatomic images and quantification of functional and metabolic information at the same time. Key steps of the Warburg effect-one of the hallmarks of tumors-can be measured non-invasively with this emerging technique. The aim of this study was to quantify and compare simultaneously imaged augmented glucose uptake and LDH activity in a subcutaneous breast cancer model in rats (MAT-B-III) and to study the effect of varying tumor cellularity on image-derived metabolic information. %K PET/MR %K [18F]FDG-PET %K hyperpolarized 13C-MRSI %K DNP %K diffusion-weighted imaging %K multimodal imaging %K NMR %K spectroscopy %U http://www.thno.org/v08p4765.htm