Abstract: A dental radiographic absorptiometric device and method is provided that quantitatively measures the amount of bone of a patient in any dentist's office. Absorptiometric information simultaneously obtained from the mandible and calibration devices are used to screen patients for osteoporosis.

Abstract: A method for verifying the authenticity of a secure document, the method includes the steps of encoding the secure document with one or more of steganographically encoded people identification, equipment identification, material identification or secure-document, production geographical location all associated with production of the secure document and all of which are not generally known to the public for forming metadata; scanning a secure document for obtaining the metadata: verifying the metadata with a database; and accepting identification by correctly matching one or more of the provided metadata.