Patent ID: 7020245
Filing Date: 2006-03-28
Classification: A61N,G21K

Abstract:
1. A collimating device for controlling a radiation field of an X-ray radiated from an X-ray radiator, the device comprising: a first plurality of collimating leaves; a second plurality of collimating leaves opposing the first plurality of collimating leaves; a laser beam generator configured to generate a laser beam which emanates between the first and second plurality of collimating leaves, the laser beam having an axis perpendicular to an axis of the radiated X-ray between the first and second plurality of collimating leaves; a detector configured to detect the laser beam; a memory configured to store position information of each leaf of the first and second plurality of collimating leaves when said each leaf is determined to intersect the laser beam based on the detection; and a controller configured to position said each leaf based on the position information to control the radiation field.