Neuroimaging clinics of North America
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Temporal bone and ear structure inflammation is commonly due to infection. It can be associated with a variety of complications and postinflammatory sequelae. Where the ear is easily inspected, clinical evaluation suffices. ⋯ High-resolution computed tomography scanning is suited for temporal bone imaging and is the modality of choice. MR imaging is useful to characterize disease, define the extent and spread of disease, or as a surveillance tool. MR imaging can be used with high-resolution computed tomography scanning to give a comprehensive evaluation of a complex disease process.
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Temporal bone high-resolution computed tomography (HRCT) and magnetic resonance (MR) imaging are valuable tools in the evaluation of pediatric hearing loss. Computed tomography is important in the evaluation of pediatric conductive hearing loss and is the imaging modality of choice for evaluation of osseous abnormalities. ⋯ A broad spectrum of imaging findings can be seen with hearing loss in children. HRCT and MR imaging provide complementary information and are often used in conjunction in the preoperative evaluation of pediatric candidates for cochlear implantation.
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Neuroimaging Clin. N. Am. · Feb 2019
ReviewManagement of Vestibular Schwannomas for the Radiologist.
Vestibular schwannomas are the most common tumor of the cerebellopontine angle. The history of their management has driven advances in imaging, lateral skull base surgery, as well as radiosurgery. With these advances, a shift has occurred from life-saving treatment for late-stage disease to quality of life focused management of smaller tumors. The complicated treatment paradigms involving observation, stereotactic radiosurgery and surgery require close communication between the treatment and neuroradiology teams.
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Visualization of the morphologic substrate of Ménière disease, the endolymphatic hydrops, can be performed using noncontrast or contrast-enhanced MR imaging techniques. Noncontrast MR imaging uses a heavily T2-weighted sequence; however, its reproducibility remains to be confirmed. ⋯ The latter technique is most frequently used and is able to detect and grade Ménière disease. It is a reliable technique with a high diagnostic accuracy, enabling visualization of endolymphatic hydrops.
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Neuroimaging Clin. N. Am. · Feb 2019
ReviewCommon Otologic Surgical Procedures: Clinical Decision-Making Pearls and the Role of Imaging.
Neuro-otologists rely on the expertise and judgment of a skilled neuroradiologist to identify radiographic abnormalities in the complicated regional anatomy of the temporal bone and middle and posterior fossa, and more importantly, to alert the surgeon to potential operative pitfalls. This article highlights some of the common otologic surgical procedures that stress this important dynamic. The surgical perspective on quick and effective clinical decision-making pearls to keep in mind during a thorough radiographic analysis of the ear and lateral skull base is presented.