AJNR. American journal of neuroradiology
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AJNR Am J Neuroradiol · Aug 2003
Comparative StudyMR imaging in the differential diagnosis of neurogenic foot drop.
Prolonged T2 relaxation time of denervated muscle has been described in several clinical and experimental studies. The purpose of this study was to evaluate the utility of MR imaging in the diagnosis of neurogenic muscle disorders compared with that of clinical and electrophysiologic examination. ⋯ MR imaging improves accuracy in the differential diagnosis of peripheral nerve lesions compared with that of EMG and can supplement EMG in the diagnosis of denervated muscles.
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AJNR Am J Neuroradiol · Aug 2003
Multicenter Study Comparative StudyHow often do neuroradiologists perform sonography of the carotid arteries? A survey of academic and nonacademic radiology practices, with implications for fellowship training.
Debate in the neuroradiology community surrounds the amount of formal training in sonography of the carotid arteries that should be provided to fellows. This study was designed to assess current practice patterns at both academic and nonacademic practices regarding the performance of carotid sonography. ⋯ At most academic practices, neuroradiologists do not perform sonography of the carotid arteries. This may explain the reluctance of some fellowships to provide formal training in this technique. In contrast, although neuroradiologists perform carotid sonography at a majority of the nonacademic practices, the percentage of studies that they perform is small; moreover, neuroradiologists perform far fewer studies than do general radiologists or sonography specialists.
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AJNR Am J Neuroradiol · Aug 2003
Comparative StudyThree-dimensional rotational spinal angiography in the evaluation and treatment of vascular malformations.
Conventional spinal angiography, although useful in providing angioarchitectural details of spinal vascular disease, has limitations. The advent of 3D angiography has provided a better comprehension of angioarchitectural detail when evaluating the intracranial circulation. The purpose of this study was to evaluate the usefulness of 3D angiography in the diagnosis and treatment of vascular malformations of the spine. ⋯ In this small series of patients, 3D angiography was safe and useful for evaluation of the 3D vascular anatomy of spinal vascular malformations.
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AJNR Am J Neuroradiol · Aug 2003
Comparative StudySonographic mapping of the normal brachial plexus.
Mapping of the brachial plexus with MR imaging has been reported and may have potential clinical applications (eg, precise localization of traumatic or tumoral nerve lesions, selective anesthesia of the brachial plexus). We sought to demonstrate that mapping of the brachial plexus may be performed by means of sonography. ⋯ The brachial plexus can be mapped with sonography. However, this technique requires a good grounding in anatomy and may be impossible in short-necked individuals.
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AJNR Am J Neuroradiol · Aug 2003
Case ReportsDiffusion tensor imaging in an infant with traumatic brain swelling.
We present the case of a 14-month-old male infant who underwent diffusion tensor imaging within 24 hours of traumatic brain injury. Although conventional MR findings that included those of diffusion-weighted imaging were unremarkable, full-tensor diffusion imaging revealed striking abnormalities in regions of brain that subsequently developed overt swelling. This case engenders important hypotheses regarding mechanisms of traumatic brain swelling and anisotropic diffusion of water in pathologic tissues.