[Implementation of multimodal navigation combined with intraoperative magnetic resonance imaging in the frameless stereotactic biopsy of intracranial lesions].

Objective: To investigate the impact and value of multimodal navigation and intraoperative magnetic resonance imaging (iMRI) on the biopsy of intracranial lesions. Methods: From February, 2009 to December, 2016, this study enrolled 156 patients, who underwent multimodal navigation and iMRI-guided brain biopsy in the Neurosurgery Department of PLA General Hospital. Metabolic information was used for biopsy target selection. Intraoperative guidance helped biopsy trajectory avoid the eloquent structures. iMRI was performed to prove the biopsy accuracy and to revise the incorrect biopsy. Diagnostic rate, perioperative neurological status, surgical parameter, and surgical outcome were recorded. Results: The first iMRI helped to revise 7 (4.5%) incorrect biopsy sites, and final iMRI confirmed biopsy accuracy in all cases. Postoperative diagnostic rate was 96.8% (151/156). No statistical difference was found between postoperative and preoperative neurological statuses, despite 86 (55.1%) lesions were adjacent to eloquent areas. Additionally, iMRI detected 6 (3.8%) intraoperative hematomas that were treated immediately. Conclusions: Brian biopsy with iMRI and multimodal navigation is a safe, accurate and efficient biopsy modality. This technique may help increase the biopsy accuracy with low morbidity and mortality.