Abstract: A microfocus X-ray tube having a rotating anode wherein X-ray are generated by electron beam bombardment of the anode and wherein the electron beam is bent as by a magnetic field to impinge on a selected surface of the anode.

Abstract: Dental X-ray apparatus characterized by very substantial reductions in radiation exposure of the patient, incorporates a ceramic window in a probe receivable into a patient's mouth, and comprises:A. X-ray tube means for providing an electron beam,B. a target for said beam, andC. a carrier for said target and locating the target in longitudinally spaced relation from said means to be received rearwardly into a patient's mouth,D. said carrier defining a tubular X-ray shield, and there being a ceramic element defining an X-ray window carried by the carrier and positioned to sidewardly laterally pass X-rays emanating from the target.

Abstract: Dental X-ray apparatus characterized by very substantial reductions in radiation exposure of the patient, comprises(a) X-ray tube means providing an electron beam,(b) a beam target carried by said means 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 means 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.

Abstract: Dental X-ray apparatus characterized by very substantial reductions in radiation exposure of the patient, comprises:(a) X-ray tube means providing an electron beam,(b) a beam target carried by said means and located axially rearwardly thereof to be received rearwardly into a patient's mouth,(c) the target angled relative to said axis to produce a radiation pattern that extends forwardly of the target and also rearwardly and sidewardly of the target, and(d) a shield adjacent the target rearwardly thereof and extending forwardly above and below the target. The shield may also define a tongue suppressor and may be removably mounted on the tubular carrier for the target. An extra-oral adapter is also provided, to removably fit on the carrier tube. Structure carried by the tube means projects an image delineating the main path of the X-ray beam.