New Stereotactic Apparatus and Cryogenic Device for Stereotactic Surgery

1975 ◽  
Vol 37 (1-3) ◽  
pp. 128-132 ◽  
Author(s):  
E.I. Kandel
Keyword(s):  
Stereotactic Surgery ◽  
Stereotactic Apparatus

Linear Accelerator as a Neurosurgical Tool for Stereotactic Radiosurgery

Neurosurgery ◽  
1988 ◽  
Vol 22 (3) ◽  
pp. 454-464 ◽  
Author(s):  
Ken R. Winston ◽  
Wendell Lutz
Keyword(s):  
Computed Tomography ◽  
Cerebral Angiography ◽  
Linear Accelerator ◽  
Photon Radiation ◽  
Entire System ◽  
High Doses ◽  
Design And Testing ◽  
Stereotactic Apparatus ◽  
The Brain ◽  
New System

Abstract A new system has been developed for stereotactically delivering prescribed high doses of radiation to precisely located volumes of approximately 0.6 to 10.0 ml within the brain. A Brown-Roberts-Wells stereotactic apparatus and a 6-MeV linear accelerator equipped with a special collimator (12.5 to 30 mm in diameter) have been adapted. The 20-mm collimator allows treatment of a nearly spherical volume of 2.1 ml. Outside the treatment field, the dosage declines to 80% of the dose prescribed for the periphery of the lesion over a distance of 1.8 mm and to 50% over the next 3.4 mm. Localization can be accomplished via computed tomography or cerebral angiography. Treatment is accomplished with an arcing beam of photon radiation with the turntable (couch) in each of four positions. The entire system has been extensively tested for accuracy in alignment and distribution of radiation. Errors have been measured for the alignment of the apparatus and for the process of localization. Safety of operation was emphasized throughout the design and testing phase. (Neurosurgery 22:454-464, 1988)

Use of an intracranial near-infrared probe for localization during stereotactic surgery for movement disorders

2000 ◽  
Vol 93 (3) ◽  
pp. 498-505 ◽  
Author(s):  
Cole A. Giller ◽  
Maureen Johns ◽  
Hanli Liu
Keyword(s):  
White Matter ◽  
Gray Matter ◽  
Movement Disorders ◽  
Near Infrared ◽  
Subcortical White Matter ◽  
Stereotactic Surgery ◽  
Resected Specimen ◽  
Subcortical Structures ◽  
Content Type ◽  
Fine Print

✓ Localization of targets during stereotactic surgery is frequently accomplished by identification of the boundaries between the gray matter of various nuclei and the surrounding white matter. The authors describe an intracranial probe developed for this purpose, which uses near-infrared (NIR) light.The probe fits through standard stereotactic holders and emits light at its tip. The scattered light is detected and analyzed by a spectrometer, with the slope of the trailing portion of the reflectance curve used as the measurement value.Near-infrared readings were obtained during 27 neurosurgical procedures. The first three operations were temporal lobectomies, with values obtained from tracks in the resected specimen and resection bed. In the next five procedures, the probe was inserted stereotactically to a depth of 1 to 2 cm with measurements obtained every 1 mm. The probe was then used in 19 stereotactic procedures for movement disorders, obtaining measurements every 0.5 to 1 mm to target depths of 6 to 8 cm to interrogate subcortical structures. The NIR signals were correlated to distances beneath the cortical surface measured on postoperative computerized tomography or magnetic resonance imaging by using angle correction and three-dimensional reconstruction techniques.The NIR values for white and gray matter obtained during the lobectomies were significantly different (white matter 2.5 ± 0.37, gray matter 0.82 ± 0.23 mean ± standard deviation). The NIR values from the superficial stereotactic tracks showed initial low values corresponding to cortical gray matter and high values corresponding to subcortical white matter.There was good correlation between the NIR signals and postoperative imaging in the 19 stereotactic cases. Dips due to adjacent sulci, a plateau of high signal due to subcortical white matter, a dip in the NIR signal during passage through the ventricle, dips due to the caudate nucleus, and peaks due to the white matter capsule between ventricle and thalamus were constant features. The putamen—capsule boundary and the lamina externa and interna of the globus pallidus could be distinguished in three cases. Elevated signals corresponding to the thalamic floor were seen in 10 cases. Nuances such as prior lesions and nonspecific white matter changes were also detected. There was no incidence of morbidity associated with use of the probe. Data acquisition was straightforward and the equipment required for the studies was inexpensive.The NIR probe described in this article seems to be able to detect gray—white matter boundaries around and within subcortical structures commonly encountered in stereotactic functional neurosurgery. This simple, inexpensive method deserves further study to establish its efficacy for stereotactic localization.

Use of stereotactic apparatus for brain tumor biopsies and craniotomies

1997 ◽  
Vol 99 ◽  
pp. S162
Author(s):  
M. Taşkin ◽  
A. Dikilitaş ◽  
L. Uysal ◽  
K. Avlar ◽  
A. Aslan ◽  
...  
Keyword(s):  
Brain Tumor ◽  
Tumor Biopsies ◽  
Stereotactic Apparatus

Akinesis Following Stereotactic Surgery for Parkinsonism The Use of L-dopa

1970 ◽  
Vol 32 (2-5) ◽  
pp. 128-134
Author(s):  
R. Ahmad ◽  
F.J. Gillingham ◽  
A. Hanieh ◽  
I.A. Pullar ◽  
J. Weddell ◽  
...  
Keyword(s):  
Stereotactic Surgery

Computer Tomography-Controlled Stereotactic Surgery

1985 ◽  
Vol 48 (1-6) ◽  
pp. 39-44 ◽  
Author(s):  
Keizo Matsumoto ◽  
Fumio Shichijo ◽  
Tsutomu Masuda ◽  
Hajime Miyake
Keyword(s):  
Computer Tomography ◽  
Stereotactic Surgery

scholarly journals STEREOTACTIC SURGERY: A NOTE ON INSTRUMENTATION

1962 ◽  
Vol 25 (1) ◽  
pp. 86-89 ◽  
Author(s):  
V. H. Mark ◽  
W. H. Sweet ◽  
P. M. McPherson
Keyword(s):  
Stereotactic Surgery
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