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They report the use of functional f MR imaging and magnetic source MS imaging for preoperative mapping of eloquent cortex in difficult cases of brain tumor resection such as those in which there are large expansive masses or in which reoperations are required and the anatomy is distorted from prior treatments. To correlate methods of preoperative and intraoperative mapping localization directly, the authors have developed techniques of importing preoperative MS and fMR imaging data into an image-guided frameless stereotactic computer workstation. The data appear as a seamless overlay on the same preoperative volumetric MR imaging dataset used for stereotactic guidance during the operation. Intraoperatively identified functional locations mapped by cortical stimulation are recorded as digitally registered points. This approach should prove useful in assessing the accuracy and reliability of various preoperative functional brain mapping techniques.

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The information about this object, including provenance, may not be currently accurate. If you notice a mistake or have additional information about this object, please email collectionsdata clevelandart. To request more information about this object, study images, or bibliography, contact the Ingalls Library Reference Desk. All images and data available through Open Access can be downloaded for free. For images not available through Open Access, a detail image, or any image with a color bar, request a digital file from Image Services. Expand Zoom In Zoom Out. Additional Views. Japan, Edo period Image: John L. Severance Fund Public Domain You can copy, modify, and distribute this work, all without asking permission. Location: not on view.

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Object: Some of the earliest successful frame-based stereotactic interventions directed toward the thalamus and basal ganglia depended on identifying the anterior commissure AC and posterior commissure PC in a sagittal ventriculogram and defining the intercommissural line that connects them in the midsagittal plane. The AC-PC line became the essential landmark for the localization of neuroanatomical targets in the basal ganglia and diencephalon and for relating them to stereotactic atlases. The goal of the present article is to present the authors' technique. Methods: The technique described uses MR sequences that minimize geometric distortion and registration error, thereby maximizing accuracy in AC-PC line determinations from axially displayed MR data. The technique is based on the authors' experience with the Leksell G-frame but can be generalized to other MR imaging-based stereotactic systems.

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Robert B. Abstract Object: Some of the earliest successful frame-based stereotactic interventions directed toward the thalamus and basal ganglia depended on identifying the anterior commissure AC and posterior commissure PC in a sagittal ventriculogram and defining the intercommissural line that connects them in the midsagittal plane. Substances Contrast Media. The Met's Libraries and Research Centers provide unparalleled resources for research and welcome an international community of students and scholars. View Expanded. Peter Heilbrun Similar articles in PubMed. J Neurosci —, Article Information. Your current browser may not support copying via this button. Technical note. Chong Article by Jeffrey D. McDonald Article by Spencer B. Image: Credit line. A total of 18 of patients developed symptomatic next-segment degeneration at a previously asymptomatic level; 15 were postmenopausal women.

The twist is that the self-published game is purposefully shorter than two hours, which means it can be finished without exceeding Steam's playtime limit for no-questions-asked refunds. If you don't have two grand to temporarily blow on this game, though, don't worry: I've played it, and you're not missing anything.

The information about this object, including provenance, may not be currently accurate. The technique is based on the authors' experience with the Leksell G-frame but can be generalized to other MR imaging-based stereotactic systems. Magn Reson Med —, AJNR —, Neurology —, If you notice a mistake or have additional information about this object, please email collectionsdata clevelandart. Location: not on view. The authors sought to determine the risk factors for next-segment degeneration after lumbar spinal fusion with rigid instrumentation. Conclusions: The risk of adjacent-segment failure is clearly higher for patients in whom lumbar fusion with rigid instrumentation is performed to treat degenerative instability. For images not available through Open Access, a detail image, or any image with a color bar, request a digital file from Image Services. Public Domain. Article Information. Artist Biography. Twenty percent of all patients with next-segment failure were cigarette smokers.