tailieunhanh - NEUROENGINEERING - PART 3

Bài viết sợi carbon và các chân tương thích với MRI / CT được sử dụng. Các quét MRI bao gồm một việc mua lại khối lượng tăng cường tương phản T1 trọng bằng cách sử dụng trục lát với khoảng cách không lát-. Tiếp theo là cả một cái đầu CT | 4-6 Neuroengineering FIGURE Intraoperative picture demonstrating the implanted Navigus electrode lead securing device Image-guided Neurologics Melbourne FL in its final position. to the patient s skull. Carbon fiber posts and MRI CT-compatible pins are used. The MRI scan consists of a contrast-enhanced T1-weighted volume acquisition using axial slices with zero slice-gap. This is followed by a whole-head CT scan using 3-mm slices with zero slice-gap. The two data sets are imported over the local network to a computer workstation BrainLab Heimstetten Germany . After fusing MR and CT data both target and trajectory are defined. A probe view algorithm is used to maximize the distance between any surface veins and the depth lead at the cortical entry point. At this point the patient is appropriately positioned on the operating table by attaching the basering to the Mayfield holder. The craniotomy incision is marked with gentian violet and the surgical area is prepped and draped in a standard sterile fashion. The previously marked incision is now infiltrated with a local anesthetic and a horseshoe-shaped craniotomy flap is turned. The Leksell stereotactic arc system is attached to the base-ring and a drill guide tube is then advanced through the incision down to the skull and antibiotic irrigation is flushed through the tube. The appropriate burr hole is outlined on the skull and a high-speed air-driven drill Midas Rex Fort Worth TX is used. Attention must be given to the diameter of the burr hole to exactly match the diameter of the Navigus Image-guided Neurologics Melbourne FL securing device which will be used for securing the implanted depth lead Figure . The underlying dura is opened in a linear fashion. At this point a mm inner-diameter guide block is introduced and the dura and pia are cauterized with a monopolar electrode AdTech Racine WI . Next a 14-gauge depth electrode cannula AdTech Racine WI is passed through the same guide block to the .

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