H - Electricity – 05 – G
Patent
H - Electricity
05
G
358/36
H05G 1/00 (2006.01)
Patent
CA 1111151
ABSTRACT OF THE DISCLOSURE Dental X-ray apparatus characterized by very substantial reductions in radiation exposure of the patient, comprises: a) an X-ray tube with a cathode providing an electron beam, b) a beam target carried by said tube and located axially rearwardly thereof to be received rearwardly into a patient's mouth, c) the target angled relative to the said axis to produce a radiation pattern that extends forwardly of the target and also rearwardly and sidewardly of the target, said X-ray tube including structure to cause the electron beam to form a beam impingement spot on the target of sufficiently small size that radiation emanating from said spot and directed toward a tooth and film produce a sharp boundary tooth image on the film, and d) an X-ray absorbing shield adjacent the target rearwardly thereof and extending forwardly at the side of the target, the shield and target being integrally connected, the shield defining a probe that projects rearwardly for reception into the patient's mouth.
304166
Borden Ladner Gervais Llp
Thoro-Ray Inc.
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