Early pseudoprogression and progression lesions in glioblastoma patients are both metabolically heterogeneous Advances in the Use of Deep Learning for the Analysis of Magnetic Resonance Image in Neuro-Oncology Using Single-Voxel Magnetic Resonance Spectroscopy Data Acquired at 1.5T to Classify Multivoxel Data at 3T: A Proof-of-Concept Study A comparison of non-negative matrix underapproximation methods for the decomposition of magnetic resonance spectroscopy data from human brain tumors Extraction of artefactual MRS patterns from a large database using non-negative matrix factorization