Neuroimaging clinics of North America
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Recent changes in sinonasal imaging are a direct result of the development of functional endoscopic sinus surgery. Because of this technique, radiologists have noted an increased volume of sinus imaging, developed new imaging techniques, and are interpreting films in a different manner. This article covers the common variants seen on coronal computed tomography, discusses the complications of functional endoscopic sinus surgery, reviews the radiographic criteria for sinusitis, and addresses the role of computed tomography and magnetic resonance imaging in evaluating the sinonasal cavity.
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Ameliorated computed tomography techniques and new magnetic resonance sequences have led to an important improvement in temporal bone imaging. Computed tomography is still the method of choice for imaging of temporal bone fractures, middle ear disease, and conductive hearing loss, although magnetic imaging can add important information. ⋯ In some cases, however, such as congenital malformations and petrous apex lesions, magnetic resonance imaging and computed tomography are complementary. The value of both modalities is discussed.
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Neuroimaging Clin. N. Am. · Feb 1996
ReviewRadiologic assessment of trauma and foreign bodies of the eye and orbit.
The detection and definition of orbital trauma is a frequent clinical problem. Therefore, the radiologic assessment is crucial. This article discusses the radiologic techniques and types of injuries that occur to the orbit.
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Lymphoproliferative disease of the orbit represents a diverse group of lesions affecting various soft tissue structures within the orbital cavity. They are one of the most common disease entities encountered in orbital pathology and frequently present with proptosis or anterior tumefactive swelling in the lids, conjunctiva, and lacrimal glands. For elucidation of the underlying cause, computed tomography and magnetic resonance imaging are the optimal imaging modalities.
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Multiple techniques are vying for establishing the new gold standard for functional cortical mapping, displacing that of the currently invasive and risk-prone techniques of subdural electrode arrays and intraoperative electrical stimulation mapping. Transcranial magnetic stimulation holds promise for functional localization of primary motor areas and speech areas, and possibly even other higher cortical functions. The technique is economical, especially when compared with the cost of functional magnetic resonance imaging and positron emission tomography. It can be performed effectively and safely in patients with epilepsy.