AJNR. American journal of neuroradiology
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AJNR Am J Neuroradiol · Sep 1985
CT of the brain in acute carbon monoxide intoxication: characteristic features and prognosis.
Of 60 patients with acute carbon monoxide (CO) intoxication caused by accidental or intentional inhalation of natural gas, smoke inhalation, or inhalation of automobile exhaust, 23 had characteristic computed tomographic findings. The most common finding, seen in 21 patients, was symmetric and diffuse low density in the cerebral white matter, which was more advanced in the centrum semiovale and varied in degree from slight to severe. ⋯ Of the 23 patients, six made a good recovery, four recovered with some disabilities, eight remained in a vegetative state, and five died. The prognosis depended on the severity of the cerebral white-matter changes and not on the size of the low-density lesion of the globus pallidus.
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The jugular foramen in normal volunteers was studied with 1.5 T magnetic resonance (MR) systems in 3-mm-thick head- and surface-coil images. Anatomic sections through cadaver heads were correlated with the MR images to identify the jugular bulb and the course of cranial nerves IX-XI. Sagittal images were more useful than coronal or axial to show the course of these nerves through the skull base. MR demonstrates the anatomic relations of the jugular foramen (except its osseous margins) such that its primary use in evaluating this region can be anticipated.
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AJNR Am J Neuroradiol · Jan 1985
Case ReportsExternal carotid-vertebral artery anastomosis for vertebrobasilar insufficiency.
Surgical treatment of vertebrobasilar insufficiency has long lagged behind that of carotid disease. However, as more aggressive microsurgical techniques have been developed, surgical intervention in vertebrobasilar occlusive disease is seen with increasing frequency. ⋯ Awareness of this new technique will be useful to the radiologist servicing an active neurosurgery practice. The clinical, radiologic, and pathologic manifestations of vertebrobasilar insufficiency are also briefly reviewed.
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AJNR Am J Neuroradiol · Mar 1984
Skull phylogeny: an investigation using radiography and high-resolution computed tomography.
To demonstrate the phylogenetic changes that have led to the current form of the human skull, dried skulls of various representative vertebrates were examined using plain radiography and high-resolution computed tomography. The latter was chosen rather than pluridirectional tomography in anticipation of its future role as the major method for imaging the skull base. The phylogenetic history of the human skull is reviewed by considering separately the evolution of the calvarium, zygomatic arch, palate, jaw, and skull base.
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AJNR Am J Neuroradiol · Sep 1982
Case ReportsMultiplanar metrizamide-enhanced CT imaging of the foramen magnum.
Definition of masses and malformations at the foramen magnum has been less than optimal with traditional radiographic techniques. The use of intrathecal metrizamide with computed tomographic (CT) scanning improves contrast resolution and facilitates detection of abnormalities that may not be apparent on Pantopaque cisternography, plain films, or conventional axial CT alone. Fifty patients with clinically suspected foramen-magnum lesions were evaluated with this technique. ⋯ Metrizamide CT cisternography provides superior spatial and contrast resolution of lesions at the foramen magnum not obtainable with other radiographic techniques. Morbidity is minimal because of the low dose of metrizamide used. Multiplanar reformations are particularly helpful in assessing anatomic detail not readily recognized on axial scans alone.