In certain circumstances that [[neuronavigation]] is not easily available or affordable, Sina can be helpful for scalp localization and pre-operative planning of the incision for selected supratentorial pathologies
((Eftekhar B. A smartphone app to assist scalp localization of superficial
supratentorial lesions - Technical note. World Neurosurg. 2015 Oct 5. pii:
S1878-8750(15)01259-0. doi: 10.1016/j.wneu.2015.09.091. [Epub ahead of print]
PubMed PMID: 26455767.
)).