Evaluating Requirements for Spatial Resolution of fMRI for Neurosurgical Planning
The unambiguous localization of eloquent functional areas is necessary to decrease the neurological morbidity of neurosurgical procedures. This paper explores the minimum spatial resolution requirements for functional magnetic resonance imaging (fMRI) data acquisition when brain mapping is used in neurosurgical planning and navigation. Using a 1.5 Tesla clinical MRI scanner, eight patients with brain tumors underwent fMRI scans using spatial resolution of approximately 4 _ 4 _ 4 mm3 to map the eloquent motor and language areas during the performance of cognitive/sensorimotor tasks. The fMRI results were then used intra-operatively in an open MRI system to delineate eloquent areas.