Abstract: A collimator for X-ray apparatus has an aperture defined by the edges of four movable flexible shutters. Each shutter can be moved independently of the other shutters; thus, the position and the size of the aperture can be adjusted at will. The shutters are moved by winding them onto drums; each drum is driven by a stepping motor. Springs bias the shutters towards the closed position of the collimator.
Type:
Grant
Filed:
December 19, 2001
Date of Patent:
September 7, 2004
Assignee:
GE Medical Systems Global Technology Company LLC
Inventors:
Jean-Pierre Saladin, Serge Louis Muller, Luc Gabriel Miotti