PubMed Health⌕ Search

Biomedical subjects

B Gelber

Publications and source records attributed to B Gelber.

6 recordsLinked to original sources
PubMed1992

The value of intraoperative scans during CT-guided stereotactic procedures.

The accuracy stereotactic procedures performed during the pre-computed tomography (CT) era was confirmed by intraoperative X-ray pictures. With the availability of CT it is now possible to confirm the position of the probe-tip on an image of the target. For biopsy of small lesions in critical areas of the brain, permanent placement of radioactive seeds, or thalamotomy, it would be desirable to have confirmation of the site of the probe-tip prior to performing the main step of the procedure. Intraoperative CT was performed in 216 stereotactic procedures carried out on the scanner table including biopsies, aspiration of cysts, brachytherapy, aspiration of abscesses, thalamotomy, and evacuation of intracerebral hematoma. In 6 cases, inaccuracies were detected, which it was possible to correct so as to place the probe where desired.

Adolescent↗
PubMed1991

Accuracy of thalamotomy target determination using axial images only.

The target point for thalamotomy is generally determined in relationship to the intercommissural line. Standard axial computed tomography (CT) images can show both the anterior and posterior commissures. However, these commissures may not always be visible on the same axial image, as the plane in which the two commissures are located may not be the same as the plane of scanning. Mathematical calculations were performed to determine the degree of error that would occur if the target point determination was performed using axial images alone, even when the two commissures were not in the same plane as the CT images. The degree of error was found to be directly proportional to the distance between the plane of scanning for the two commissures. For each millimeter separation of these planes an error of approximately 0.11 mm in the z-coordinate (caudo-cephaled distance) and 0.04 mm in the y-coordinate (antero-posterior distance) was observed. These errors were felt to be negligible, especially since the final target point determination is based on physiological responses.

Humans↗
PubMed1990

Intraventricular neurocytoma: a report of two cases.

Intraventricular neurocytoma is a rare clinicopathological entity that has been recently recognized. Previous reports have not described the magnetic resonance imaging findings of this tumor. This paper describes two patients with neurocytoma in which serpiginous flow voids and isointensity with cortex were distinctive features on the magnetic resonance imaging scan. Immunohistochemical studies showed reactivity for neuron-specific enolase, Leu-7, and S-100 protein.

Adult↗
PubMed1990

Therapy of giant intracranial aneurysms in the elderly.

A series of 13 elderly patients (eight female, five male) with giant intracranial aneurysms is presented. The mean age was 67.8 years, with a range of 57-81 years. The paper presents the significant medical problems associated with operating on elderly individuals. Surgical intervention was attempted in all cases. Following surgical treatment, eight patients (62%) are alive and functional. Three patients (23%) are alive but partially disabled. Two patients (15%) died during the perioperative period. This compares favorably with other series which include younger patients indicating surgery for giant intracranial aneurysms can be carried out in elderly patients with an acceptable morbidity and mortality.

Aged↗