[Usefulness of transcranial sonography in Parkinson's disease. A comparative study using 123I-FP-CIT SPECT].

Background And Objective: An increased echogenicity of the substantia nigra in patients with Parkinson's disease has been demonstrated by brain parenchyma sonography (BPS). BPS is a new and non-invasive technique that allows imaging of the brain in 2-dimensional axial slices. Changes in echogenicity can be displayed using ultrasounds.