=====Preoperative mapping of language area=====
It is done by [[functional MRI]] (fMRI) at 3T.

There are pitfalls in preoperative fMRI as currently used in preoperative [[language mapping]] in glioma patients, made more complicated when high-grade and hyperperfused tumors are evaluated
((Kuchcinski G, Mellerio C, Pallud J, Dezamis E, Turc G, Rigaux-Viodé O,
Malherbe C, Roca P, Leclerc X, Varlet P, Chrétien F, Devaux B, Meder JF,
Oppenheim C. Three-tesla functional MR language mapping: Comparison with direct
cortical stimulation in gliomas. Neurology. 2015 Jan 14. pii:
10.1212/WNL.0000000000001226. [Epub ahead of print] PubMed PMID: 25589667.))