The vision of integrating magnetic resonance (MR) technology into the neurosurgical operating room is relatively new. The primary goal is the fusion of direct vision and image-based information. The ideal intraoperative magnetic resonance imaging (iMRI) system needs to incorporate the features and characteristics of both the operating room and a diagnostic MR suite (1).Currently the best imaging modality for examining the central nervous system and defining pathologic changes is magnetic resonance imaging (MRI). The main reason is the ability of MRI to delineate soft tissue structures in a multiplanar, radiation-free fashion. MR also is able to characterize both anatomical and functional properties of normal and diseased tissue. The neuroradiologist and neurosurgeon use this information to define the intracra-nial target and preoperatively plan the neurosurgical corridor to the lesion. Intraoperative MRI updates the pre-operative diagnostic studies, refines the surgical approach, confirms accomplishment of surgical objectives, and excludes acute surgical complications. By updating spatial coordinates, injury to normal tissue is minimized.
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