A
radio frequency identification (RFID)
system having the capacity to detect various geometric parameters of alignment. The described
system is configured for use with dental x-
ray,
medical imaging and treatment, and customary and
digital radiography apparatus, but is not restricted to such apparatus or applications. The
system may include a multiplicity of RF transponders, RF tags, and RF readers, wherein each RF tag may include one or more carrier receive / data transmit coils and wherein each RF reader may include one or more carrier transmit / data receive coils, and wherein each coil of an RF tag or RF reader may resonate at one or more, and / or, at the same or differing frequencies. An RF tag located about an x-
ray sensitive film or device, and an RF reader located about a dental x-
ray machine or apparatus, are configured to be critically aligned, one to the other, rendering repeat imaging unnecessary.