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John Lawley wrote: > > Hi Joe and all from Erika > Thanks for more great CSR's, they often spark some thought. > > >Becker G et al; Neur 1995;45:182-184: > >One might think the brain's bony case prevents imaging with the > >simple technique of ultrasound, but it turns out that acoustic > >windows make it possible. They compared PD patients with healthy > >controls, and found the substantia nigra in the PD group to be > >distinctly more reflective than normal. > > Does anyone have any idea "what" is the cause of this extra reflectiveness? Not I, but the original articles contain some illustrations that are fairly convincing. As you probably know, ultrasound images tend to be rather blurry and confused, and it takes a trained observer to interpret them accurately. Cheers, Joe -- J. R. Bruman (818) 789-3694 3527 Cody Road Sherman Oaks, CA 91403-5013