The purpose of the study is to investigate the use of a special radioactive drug called
123I-MIBG and myocardial MIBG scintigraphy. This scan may be able to help determine who may
have a certain kind of neurologic disorder called Lewy Body Disease.
The overall purpose of this study is to correlate myocardial MIBG scintigraphy findings with
clinical diagnosis. Myocardial MIBG scintigraphy imaging will be combined with other
clinical, neuropsychological and neuroimaging findings to improve the prediction for
underlying Lewy Body Disease.