Interest of routine MR spectroscopic techniques for differential diagnosis between radionecrosis and progression of brain tumor lesions.

Objectives: The main objective of the study is to assess the feasibility and reproducibility of routine MRS to assist in the differential diagnosis between post-radiation necrosis and tumor progression. The secondary objective is to evaluate the accuracy of the method.

Method: An additional sequence of MRS was added to the standard protocol routinely used for patient follow-up.