Neuroimaging clinics of North America
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Primary central nervous system tumors are the most common solid tumors in children. Their overall frequency is second only to that of leukemia. Many brain tumors in children are relatively benign and can be successfully treated with surgery or radiation therapy, but progress in treating the malignant forms of these neoplasms lags behind that for leukemias and other solid tumors. This article discusses how MR spectroscopy is used to manage the individualized treatment of children with brain tumors.
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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.