Self shielded computerized tomographic scanner

• US 4,977,585 A
• Filed: 04/05/1989
• Issued: 12/11/1990
• Est. Priority Date: 04/05/1989
• Status: Expired due to Term

• Current Assignee: GE Medical Systems Global Technology Company LLC (GE Healthcare Technologies, Inc.)
• Original Assignee: Imatron, Inc.
• Inventors: Boyd, Douglas P.
• Primary Examiner(s): Church, Craig E.
• Application Number:
  US07/334,076
• Time in Patent Office: 615 Days
• Field of Search: 378/4-20, 378/57, 378/203, 378/204, 378/210
• US Class Current: 378/4
• CPC Class Codes: A61B 6/035 Mechanical aspects of CT
• CPC Class Codes: A61B 6/107 Protection against radiation, e.g. shielding

Abstract

A compact computerized tomographic x-ray scanner having a patient tunnel in which the walls and the ends of the patient tunnel include shielding material to form a shielded enclosure in which the patient body portion is scanned.

Claims

1. In a compact computerized tomographic x-ray scanner of the type including a gantry having spaced faces and a patient tunnel extending between said faces, an x-ray tube in said gantry to project an x-ray beam across said tunnel, a detector array in said gantry for receiving x-rays and providing output signals representative of transmission, a patient couch for introducing a patient into said tunnel, and a signal processing system for receiving the output signal form said detector array providing an image of a section of a patient body placed in the tunnel, the improvement comprising:

a layer of x-ray shielding material forming a lining for said tunnel; and

a layer of x-ray shielding material disposed at each of said faces to define with said tunnel a shielded enclosure which shields the surrounds form x-ray scattered by a patient and couch within the enclosure, each curtain comprising two parts movable towards and away from one another whereby the parts are moved away from one another to allow the patent to be introduced into the tunnel and moved towards one another to engage the couch and patient to define the enclosure.

2. A self-shielded computerized tomographic scanner as in claim 1 in which said curtain parts include a rigid portion and a flexible portion which conforms to the shape of the patient and couch.

3. A self-shielded computerized tomographic scanner as in claim 1 including means for guiding said curtains for movement towards and away from one another.