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At least 37 records · Page 2Linked to original sources
PubMed1989

[Stereotaxic technics with an open skull in the treatment of space-occupying brain lesions].

When intra-cerebral space-occupying lesions are small or when they are deeply located in the brain parenchyma, it is sometimes difficult to localize them at surgery or to design the most direct and least hazardous surgical approach. Therefore we have developed a method which combines conventional neurosurgical techniques with craniotomy using stereotaxic guidance. We have used the Brown-Roberts-Wells (B.R.W.) stereotaxic system which allows for CT scan or MRI guidance and does not interfere with the absolute sterility mandatory every time a flap is created. Eleven patients were operated on using this method. The deep tumors were approached through a linear incision of the cerebral cortex; then a needle fixed in the right position on the arc system of the B.R.W. was inserted toward the surface of the lesion; the exposure was finally widened by the inflation of a rubber balloon set on the stereotaxic needle. The post-operative course was very uncomplicated in all these patients. No permanent post-operative neurological worsening was observed, even after the removal of an intra-thalamic tumor.

Brain Neoplasms↗
PubMedDate not supplied

[Stereotaxic technics in expanding lesions of the brain stem].

Stereotactic biopsies, according to the Talairach's system, define the histopathological data (nature, grading, spatial delimitation, evolutive potential) of brain stem lesions, precisely localized by computerized tomography scanner and magnetic resonance imaging. They are the more valued complement of the modern neuro-imaging and they prove the extreme polymorphism of theses lesions. According to this histological analysis and the volume of the lesions, it's possible to choose the best therapeutic procedure.

Adult↗
PubMed1997

[Stereotaxic technics and clinical neurosurgery].

Stereotactic methodology developed at Sainte-Anne Hospital Center from 1947 is based on the application of a simple spatial geometry-the Talairach Ac-Pc reference system-to the cranial volume and the identification of any anatomical structure or brain lesion within this volume. Now upgraded with modern imaging techniques, this methodology is the ground for multiple applications in functional as well as lesional neurosurgery and is now a a part of the daily neurosurgical practice at Sainte-Anne Hospital. Stereotactic procedures include three steps: first, the identification of one or several target-volumes through stereotactic imaging acquisition: CT, MRI and conventional stereoscopic angiography; second, the image treatment on a dedicated workstation for stereotactic coordinates determination and surgical planning; third, the surgical procedure itself and its control. The most frequent applications for stereotactic methodology are: image-guided stereotactic biopsies of brain tumors, in order to obtain tissue pathological diagnosis and spatial configuration; linac-based radiosurgery of arterio-venous malformations and tumors with high energy collimated beams converging towards a simple or complex target volume; surgery for partial drug-resistant epilepsy including depth electrode implantation for stereo-electroencephalography and epileptogenic cortex resection; stereotactic image-guided resection of superficial or deep-seated tumors or vascular malformation; Rhenium 186 intracavitary irradiation of cystic tumors such as craniopharyngiomas.

Biopsy↗
PubMed1988

New head fixation for the Riechert stereotaxic system. Technical note.

The combined use of stereotaxic and microsurgical techniques makes it possible to minimize damage to critical nervous tissue during operations in subcortical regions. The Riechert stereotaxic system has been further modified. The patient's head is fixed in the new head ring with standard Mayfield pins. The headring is connected to a standard Mayfield clamp at symmetrical bearings at 0, 90, 180, and 270 degrees, which holds the head stable in any desired position and allows unhindered access to the cranial vault and skull base.

Humans↗
PubMed1980

New frame for stereotaxic surgery. Technical note.

A new frame designed for stereotaxic surgery allows performance of a one-stage procedure without the need for mathematical calculation or the use of atlases or diagrams. This frame simulates the reference line in the center of the brain with two lines, one on each side of the head (on the frame) parallel and equal in length to the reference line and at equal distance from the midline. Lesions can be made easily and accurately on either or both sides in a one-stage procedure with use of precise data for the target through any specific or pre-existing burr hole.

Humans↗
PubMed1987

A new fixation device for the Leksell stereotaxic system. Technical note.

A device is presented that permits several applications for the Leksell stereotaxic system. The patient is fixed in this new system by means of a rectangular instrument that connects to the standard Leksell stereotaxic coordinate frame and maintains spatial orientation after the frame itself is removed. Specific uses for this device include stereotaxic radiosurgery and stereotaxic guidance during microsurgery. Other attractive features of this device are its capability of being precisely reapplied, its compatibility with both computerized tomography and magnetic resonance imaging, and the availability of an accessory device to adapt it for animal stereotaxis.

Humans↗