Feasibility of 11C-MET PET/MRI Imaging in Pediatric Brain Fossa Tumors

"Except PET/MRI imaging, all the examinations will be done according to the patient's usual care.~PET/MRI imaging will be realized within max 7 days after children enrollment, and the surgery (usual care) will be performed within max 4 days after PET/MRI imaging.~PET/MRI imaging will include the following sequences: T1axial, Diffusion, Magnetic susceptibility post-Gadolinium injection, 3DT1 pre and post-Gadolinium injection, and Arterial Spin Labelling Imaging (ASL)."