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Biomedical subjects

R Tash

Publications and source records attributed to R Tash.

4 recordsLinked to original sources
PubMed1994

Preoperative and postoperative neuroradiologic evaluation of cervical disk disease.

For over five years, a 2.0 Tesla superconductive magnetic resonance imager (Elscint) has been available in Rockland County for neuroradiologic evaluation of cervical disk herniation, stenosis, and spondylosis. Refinement in surface coil design, software, and scanning technique seems to have overcome the problems of providing thin, artifact-free sections with high signal to noise and contrast to noise in a short amount of time. Noninvasive magnetic resonance imaging has been used routinely to preoperatively screen and to postoperatively diagnose patients with cervical radiculopathy and myelopathy. The only patients who underwent conventional myelography or computerized-tomographic myelography were extremely claustrophobic or had a contraindication to MRI such as an aneurysm clip or pacemaker.

Adult↗
PubMed1991

Preoperative and postoperative neuroradiologic evaluation of lumbar disk herniation.

Three hundred and forty patients with signs and symptoms of lumbar disk disease were evaluated preoperatively by conventional X-rays, computed tomography, and 2.0 Tesla magnetic resonance imaging (MRI). High-resolution T2 weighted MRI provided a truly noninvasive myelogram. The operative findings were predicted by and correlated with the neuroradiologic studies. High-resolution MRI with intravenous gadolinium-DTPA (Magnevist, Berlex) has been particularly useful in evaluating patients with a history of prior disk surgery and patients who were not relieved of pain by lumbar diskectomy.

Adult↗
PubMedDate not supplied

Hemifacial spasm: MR imaging features.

MR imaging was used to evaluate the relationship of the root exit zone of the seventh cranial nerve to surrounding vascular structures in 13 patients with clinically documented hemifacial spasm and in 70 asymptomatic patients. MR imaging clearly demonstrated the course of the seventh nerve from the root exit zone of the brainstem to the internal auditory canal and its relationship to the surrounding vertebrobasilar system. The presence of a vascular structure at the root exit zone of the seventh nerve was identified in all 13 patients with hemifacial spasm. In the 70 asymptomatic patients, examination of 140 seventh nerves revealed that 21% had contact by a vascular structure at the root exit zone of the seventh nerve. Our results indicate that although neurovascular contact may be asymptomatic, MR demonstration of a vascular structure at the root exit zone of the seventh cranial nerve in a patient with hemifacial spasm may implicate neurovascular compression as the cause of symptomatology. This finding may alter therapeutic management. Because of the inherent limitations of CT in the visualization of posterior fossa structures, MR imaging should be considered the initial screening procedure in the assessment of patients with hemifacial spasm.

Adult↗