A method of identifying a patient as prodromal to a disease associated with amyloid deposition by imaging techniques is provided. In addition, a method of identifying amyloid deposition diseases in patients who present with a dementing disorder of questionable etiology by imaging techniques is provided. The methods discloses substances which are used for imaging and generating data which can be used to determine progress of an asymptomatic patient to a disease associated with amyloid deposition. or to identify amyloid deposition diseases in patients who present with a dementing disorder of questionable etiology.
