Overhead X-ray apparatus for imaging in bi-plane configuration

• US 5,086,447 A
• Filed: 06/04/1990
• Issued: 02/04/1992
• Est. Priority Date: 06/04/1990
• Status: Expired due to Fees

• Current Assignee: Aldona A. Siczek, Bernard W. Siczek
• Original Assignee: Aldona A. Siczek, Bernard W. Siczek
• Inventors: Siczek, Aldona A., Siczek, Bernard W.
• Primary Examiner(s): Fields, Carolyn E.
• Assistant Examiner(s): Porta, David P.
• Application Number:
  US07/533,155
• Time in Patent Office: 610 Days
• Field of Search: 378/193, 378/197, 378/198, 378/196
• US Class Current: 378/197
• CPC Class Codes: A61B 6/4441 the rigid structure being a C-arm or U-arm
• CPC Class Codes: A61B 6/4464 the source unit or the detector unit being mounted to ceiling

Abstract

An overhead X-ray apparatus for imaging in the bi-plane configuration which apparatus has the radiation isocenter vertically displaceable. A C-arm (or a like) for supporting an X-ray tube and image receptor is mounted on a carriage assembly in a rotatable arrangement about a vertical axes. The carriage assembly comprises a support frame and a slideable support mounted on overhead rails coupled by a scissor mechanism. A distance between the support frame and the slideable support and, hence the vertical position of the radiation isocenter can be varied by action of chains or timing belts connecting the support frame with the anchoring member which moves along the slideable support while actuated by an actuator.

Claims

1. An X-ray imaging apparatus for medical examinations comprising:

a support member for an X-ray tube and an X-ray image receptor mounted on a carriage assembly in a rotatable arrangement about a virtual vertical axis, wherein said carriage assembly is mounted on overhead rails and includes a means for providing vertical displacement of said support member relative to said overhead rails which means comprises a scissor mechanism disposed in an offset arrangement to the axis of rotation of said support member.

2. An X-ray imaging apparatus for medical examinations comprising:

a support member for an X-ray tube and an X-ray image receptor, mounted on a carriage assembly, which carriage assembly comprises a support frame coupled to a slideable support mounted on overhead rails and a means for varying the distance between said support frame and said slideable support comprising a pair of positive motion transmission means that move said support frame relative to said slideable support in a parallel shifting motion, which positive motion transmission means engage two positive traction wheels coupled to one another in rotating motion and anchored to an anchoring member linearly moved by an actuator.