Neuroimaging clinics of North America
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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 diagnostic evaluation of a brain arteriovenous malformation requires a thorough understanding of the imaging features seen on CT, MR, and conventional angiography. Therapeutic planning requires a comprehensive understanding of the angioarchitecture of AVMs, necessitation selective and superselective angiography in order to give an accurate assessment of the lesion. ⋯ AVM treatment requires a multidisciplinary approach that includes interventional neuroradiology, radiosurgery, and neurosurgery. The considerations and philosophies of each discipline will discussed in order to provide the perspective required for the comprehensive treatment of AVMs.
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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. · Feb 1998
Anatomy of the mandible, temporomandibular joint, and dentition.
This article provides an overview of the normal gross anatomy and physiology of the mandible, TMJ, as well as a working overview of normal dental anatomy. The appearances of a number of important anatomic structures and features on plain film, computed tomography, reformatted computed tomography, and magnetic resonance imaging studies are presented.
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For survivors of aneurysmal subarachnoid hemorrhage, cerebral vasospasm significantly contributes to its morbidity and mortality by causing delayed ischemic neurological deficit. Noninvasive evaluation with computed tomography, transcranial doppler and single photon emission computerized tomography helps guide clinical decisions. ⋯ Encouraging long-term clinical and transcranial artery damage following angioplasty. Despite balloon angioplasty's 2% to 5% peri-procedure mortality rate, it remains under used.