| Literature DB >> 24065265 |
Abstract
The detection of an enlarged echogenic size ("hyperechogenicity") of the substantia nigra on transcranial sonography is increasingly used for the early and differential diagnosis of Parkinson disease. However, the diagnostic value of substantia nigra sonography depends on the quality of its execution. This article with an accompanying video presents a step-by-step description and demonstration of ultrasound system settings, typical errors in assessment of the substantia nigra, planimetric measurement of substantia nigra echogenicity according to current guidelines, and its diagnostic implications in 2 exemplary patients with parkinsonism. Published cutoff values for grading substantia nigra hyperechogenicity with different ultrasound systems and novel technologies are reviewed.Entities:
Keywords: Parkinson disease; methodological standard; parkinsonism; substantia nigra; transcranial sonography
Mesh：
Year: 2013 PMID： 24065265 DOI： 10.7863/ultra.32.10.1837
Source DB: PubMed Journal: J Ultrasound Med ISSN： 0278-4297 Impact factor: 2.153