Neuroimaging in basal ganglia disorders: Perspectives for transcranial ultrasound
Identifieur interne : 006C25 ( Main/Merge ); précédent : 006C24; suivant : 006C26Neuroimaging in basal ganglia disorders: Perspectives for transcranial ultrasound
Auteurs : Georg Becker [Allemagne] ; Daniela Berg [Allemagne]Source :
- Movement Disorders [ 0885-3185 ] ; 2001-01.
Abstract
Transcranial sonography is a new diagnostic tool, allowing not only the evaluation of cerebral arteries but also the two‐dimensional display of the brain parenchyma. In this review we will summarize basics of the application, the ultrasound anatomy of the brain and sonographic findings in some movement disorders. While in normal adults basal ganglia nuclei are hypoechogenic, they are hyperechogenic in certain basal ganglia disorders. In Parkinson's disease, for example, the substantia nigra can be depicted as a distinctly echogenic area. An elevated echogenicity of the lentiform nuclei was noticed in patients with primary adult‐onset dystonia. In both disorders the altered echogenicity may arise from higher heavy metal tissue content (i.e. iron in Parkinson's disease and copper in primary dystonia). Our findings converge to the hypothesis that transcranial ultrasound sensitively detects pathological metal accumulation not identified by other neuroimaging techniques (CT and MRI) and therefore provides new insights in the diagnosis of basal ganglia disorders. The implications of these findings for the understanding of the pathogenesis and its usefulness for the early diagnosis of movement disorders are outlined. Mov. Disord. 16:23–32, 2001. © 2001 Movement Disorder Society.
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DOI: 10.1002/1531-8257(200101)16:1<23::AID-MDS1003>3.0.CO;2-2
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