Magnetic resonance imaging clinics of North America
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Magn Reson Imaging Clin N Am · May 2013
ReviewBrain tumors: a multimodality approach with diffusion-weighted imaging, diffusion tensor imaging, magnetic resonance spectroscopy, dynamic susceptibility contrast and dynamic contrast-enhanced magnetic resonance imaging.
This article focuses on advanced magnetic resonance (MR) imaging techniques and how they can be used to help diagnose a specific tumor, suggest tumor grade and prognosis, follow tumor progression, evaluate tumor extension, suggest the ideal site for biopsy, and assess therapeutic response. Advanced MR imaging techniques may also help to distinguish between lesions that simulate brain tumors on conventional MR imaging studies.
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MR imaging of the brachial plexus assesses the continuity of the elements, relationship, and orientation of lesions, evaluates morphology, and reveals secondary features of plexopathies. The selection of sequences and imaging planes is guided by the history, clinical examination, and suspected type and location of the abnormality. Increased magnet strength and isotropic imaging with multiplanar reconstructions may allow for standardized imaging protocols and shorter examination time. This article discusses MR imaging evaluation of the brachial plexus, relevant anatomy, and common pathology with clinical and imaging details, indications for use of intravenous contrast, differential considerations, and diagnostic pitfalls.
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Magn Reson Imaging Clin N Am · Aug 2012
ReviewMyocutaneous flaps and other vascularized grafts in head and neck reconstruction for cancer treatment.
This article addresses the clinical evaluation and some of the more common flaps and grafts used to reconstruct the surgical bed after excision of primary head and neck cancers and nodal metastases. This focused summary is intended to enhance the reader's understanding and improve the interpretation of posttreatment MR imaging. A practical approach to MR imaging evaluation of the postoperative reconstructed neck is presented. Readers of this article will become familiar with the normal appearances of commonly used flaps, recognize common complications, be able to delineate residual and recurrent neoplasm, and learn to avoid interpretative pitfalls.
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Magn Reson Imaging Clin N Am · Aug 2012
ReviewApplications of magnetic resonance imaging in adult temporal bone disorders.
Magnetic resonance (MR) imaging has new applications in the assessment of temporal bone disorders. This article summarizes current MR imaging applications in evaluating adult temporal bone lesions according to their location, beginning from the most common indication, vestibular schwannoma. ⋯ Although this article emphasizes the role of MR imaging, the diagnostic value of computed tomography scan associated with MR imaging is also stressed. The main indications of temporal bone MR imaging are summarized.