1999.90

The information about this object, including provenance, may not be currently accurate. If you notice a mistake or have additional information about this object, 1999.90 email collectionsdata clevelandart. To request more information about this object, 1999.90, study images, or bibliography, contact the Ingalls Library Reference Desk, 1999.90. All images and data available through Open Access can be 1999.90 for free.

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. Magn Reson Med —,

1999.90

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. This methodology has been used in a series of 62 stereotactic procedures in 47 adults 55 pallidotomies and seven thalamotomies with preliminary results that compare favorably with results reported when using microelectrode recordings. The measurements of the AC-PC line reported here also compare favorably with those based on ventriculography and computerized tomography scanning. Conclusions: The methodology reported here is critical in maintaining the accuracy and utility of MR imaging as its role in modern stereotaxy expands. Accurate parameters such as these aid in ensuring the safety, efficacy, and reproducibility of MR-guided stereotactic procedures. 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.

Artist Biography. Neurology —,

Due to rights restrictions, this image cannot be enlarged, viewed at full screen, or downloaded. As part of the Met's Open Access policy , you can freely copy, modify and distribute this image, even for commercial purposes. This artwork is meant to be viewed from right to left. Scroll left to view more. Use your arrow keys to navigate the tabs below, and your tab key to choose an item. Period: pre-Angkor period. Date: 8th—early 9th century.

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1999.90

Due to rights restrictions, this image cannot be enlarged, viewed at full screen, or downloaded. As part of the Met's Open Access policy , you can freely copy, modify and distribute this image, even for commercial purposes. This artwork is meant to be viewed from right to left. Scroll left to view more. Use your arrow keys to navigate the tabs below, and your tab key to choose an item. Period: pre-Angkor period. Date: 8th—early 9th century. Culture: Thailand.

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Public Domain You can copy, modify, and distribute this work, all without asking permission. Open Access. Object: The authors performed a retrospective analysis of consecutive patients in whom instrumentation was placed to promote lumbar fusion for the treatment of degenerative instability. Conclusions: The methodology reported here is critical in maintaining the accuracy and utility of MR imaging as its role in modern stereotaxy expands. J Neurosurg —, Lewine Jeffrey D. This methodology has been used in a series of 62 stereotactic procedures in 47 adults 55 pallidotomies and seven thalamotomies with preliminary results that compare favorably with results reported when using microelectrode recordings. Magn Reson Imaging —, Resources for Research The Met's Libraries and Research Centers provide unparalleled resources for research and welcome an international community of students and scholars. Cite this page. Substances Contrast Media. While fragile paper fans are often used for a single season, this one was cherished for its design. ArtLens App. Did You Know? Peter Heilbrun Similar articles in Google Scholar.

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Object: The authors performed a retrospective analysis of consecutive patients in whom instrumentation was placed to promote lumbar fusion for the treatment of degenerative instability. Severance Fund For images not available through Open Access, a detail image, or any image with a color bar, request a digital file from Image Services. Advanced Search Help. Magn Reson Imaging —, Ojemann GA : Cortical organization of language. Patients frequently had more than one degenerative process at the next segment. Open Access data and public domain images are available for unrestricted commercial and noncommercial use without permission or fee. The measurements of the AC-PC line reported here also compare favorably with those based on ventriculography and computerized tomography scanning. Accurate parameters such as these aid in ensuring the safety, efficacy, and reproducibility of MR-guided stereotactic procedures.