Computed tomography scanner drive system and bearing

Details Computed tomography scanner drive system and bearing Computed tomography scanner drive system and bearing

1997-10-10

1999-11-09

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 20, G01N 2300

Patent

active

059828447

ABSTRACT:
In an improved computed tomography scanner drive system and bearing configuration, a gantry disk is sheaved about its perimeter such that the gantry is operable as a driven pulley rotatable about an object to be scanned. A motor assembly mounted to a stationary frame includes a similar sheaved drive pulley. A belt tensioned between the drive pulley of the motor assembly and the driven pulley of the gantry disk transfers rotational motion of the motor to drive the gantry rotationally about the object. In a preferred embodiment, the belt comprises a V-belt or poly-V-belt, and the bearing comprises a wire bearing located proximal to the gantry center of mass. In this manner, the present invention provides a simple and effective technique for driving the gantry about the object, providing sufficiently accurate angular positioning in a reliable and cost effective drive system.

REFERENCES:
patent: 4093863 (1978-06-01), Zacher
patent: 4200799 (1980-04-01), Saito
patent: 4797008 (1989-01-01), Helbig et al.
patent: 5071264 (1991-12-01), Franke etal.
patent: 5448608 (1995-09-01), Swain et al.

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