A technique for computer-guided stereotaxis without preoperative head fixation.
A CT-guided stereotactic method is described which uses a standard BRW frame for probe insertion but which does not require frame fixation to the skull during the localizing scan. The patient is instead scanned wearing three radiopaque scalp markers, and new software utilized to obtain BRW coordinates. Acceptable accuracy for targets greater than one centimeter in diameter was obtained in phantom trials and in three case reports. This technique may be helpful for stereotactic targets greater than one centimeter in diameter and when preoperative head fixation is not desirable or possible.
Department of Neurological Surgery, University of Texas, Southwestern Medical Center, Dallas 75235-8855.
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Giller
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Purdy
D001921:Brain / Q000000981:diagnostic imaging; D004569:Electroencephalography; D006801:Humans; D008297:Male; D008875:Middle Aged; D008961:Models, Structural; D012640:Seizures / Q000209:etiology; D012984:Software; D013238:Stereotaxic Techniques; D014057:Tomography, X-Ray Computed / Q000379:methods*