Apparatus for conducting cranial X-ray tomography and radiograph

Details Apparatus for conducting cranial X-ray tomography and radiograph Apparatus for conducting cranial X-ray tomography and radiograph

1992-08-07

1994-06-28

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Dental panoramic

378168, 378171, A61B 614

Patent

active

053254155

ABSTRACT:
Apparatus is provided for cranial X-ray tomography and radiography which includes a housing having a horizontal support projecting forwardly therefrom. A pivot arm is pivotally supported by the horizontal support by means of a pivot bearing. The pivot arm provides support for a narrow beam tomographic X-ray source and film holder and is provided with a guide bearing which has guided relation with a horizontal guide shaft within the housing to provide for horizontal pivotal oscillation of the support arm during tomographic procedures. The pivot arm is controllably moved by means of a reversible electric motor which imparts driving movement to the guide bearing by means of a flexible drive element. The electric motor is controllably energized and deenergized by means of electrical circuitry incorporating limit switches which limit pivotal movement of the pivot arm. A patient head locator is provided in the form of a locator device which projects laterally from the fixed horizontal support and adjustably presents a mouthguard-type dentition engaging element so as to enable patient location with an anatomical area of interest located precisely at the focal point of the X-ray source. Proper location is achieved by means of an elongate pointer which is removably positioned along the axis of rotation of the pivot arm with its lower pointed end precisely at the focal point of the X-ray source.

REFERENCES:
patent: 3743832 (1973-07-01), Wright
patent: 4145611 (1979-03-01), Valila
patent: 5148454 (1992-09-01), Coffman

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