Neuroimaging clinics of North America
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Neuroimaging Clin. N. Am. · Nov 1998
ReviewProton MR spectroscopy in inflammatory and infectious brain disorders.
This article reviews the proton MR spectroscopy literature regarding brain infarction and inflammatory diseases. We examine the salient findings reported for bacterial abscesses, intracranial tuberculomas, Creutzfeldt-Jakob disease, herpes simplex encephalitis and HIV. These processes demonstrate specific metabolic profiles which may be useful in differential diagnosis. The results reported in the literature support the view that MR spectroscopy can be employed in longitudinal studies to monitor the response to therapy and therefore may lead to individual optimized treatment effectiveness.
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Neuroimaging Clin. N. Am. · Aug 1998
ReviewUnique CT imaging advantages. Hemorrhage and calcification.
Computed tomography remains the imaging modality of choice in the detection of two processes: acute intracranial hemorrhage and calcification; however, in the subacute and chronic stages of hemorrhage, MR imaging is more sensitive in aging and staging hemorrhage. FLAIR imaging increases the sensitivity of MR imaging in the detection of subarachnoid hemorrhage. ⋯ CT is superior to MR imaging in the detection of calcification. A number of factors including slice thickness, as well as window width and level may affect the detectability of calcification on CT.
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The normal orbit arguably contains the most complex anatomy of the human body. The orbit's small size, complex anatomy, and elaborate function make it a diagnostic challenge to evaluate. ⋯ This article attempts to review and illustrate the normal anatomical structures that can be identified on CT and MR images. These structures include the bony orbit, globe and optic nerve, extraocular muscles, lid retractor system, fibrous tissue framework, vascular system, neural structures, and lacrimal system.
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Neuroimaging Clin. N. Am. · Nov 1997
ReviewClinical evaluation and management of aneurysmal subarachnoid hemorrhage.
As neuroradiologic techniques become more critical to the care of patients suffering from aneurysmal subarachnoid hemorrhage, a thorough understanding of the natural history and medical management of this disorder by neuroradiologists is required to insure appropriate diagnosis and therapy. This article addresses the medical and perioperative management of subarachnoid hemorrhage, with an emphasis on features relevant to neuroradiologic diagnosis and treatment.
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An estimated 1% to 5% of adults have a cerebral aneurysm. Each year, approximately 1 in 10,000 North Americans suffer an aneurysmal subarachnoid hemorrhage, with greater than 50% combined morbidity and mortality. Cerebral aneurysm formation and rupture is associated with a variety of factors, including increasing age, female gender, hypertension, alcohol, smoking, and genetic factors.