Variable pin-hole type collimator and radiation imaging device using the same
View Patent ↗The present invention relates to a variable pin-hole type collimator applied to a radiation imaging device. The variable pin-hole type collimator comprises: a hole forming module having a plurality of apertures which are stacked in a direction of irradiation such that each aperture defines a penetrating-space through which radiation passes; a plurality of driving modules which are configured that each driving module varies each penetrating-space of the aperture independently; and a collimating controller to control the driving modules such that each penetrating-space of the aperture varies independently and the hole forming module forms a pin-hole through which radiation passes. Therefore, a collimator having various types can be embodied by the variation of the pin-hole shape.
1. A variable pin-hole type collimator applied to a radiation imaging device comprising:
a hole forming module having a plurality of apertures which are stacked in a direction of irradiation such that each aperture defines a penetrating-space through which radiation passes;
a plurality of driving modules which are configured such that each driving module varies each penetrating-space of the aperture independently; and
a collimating controller to control the driving modules such that each penetrating-space of the aperture varies independently and the hole forming module forms a pin-hole, which is divided into a first cone region, a penetrating hole region and a second cone region, through which radiation passes.
2. The variable pin-hole type collimator according to claim 1 , wherein the penetrating-space formed by each aperture has a circular shape or an oval shape.
3. The variable pin-hole type collimator according to claim 1 , wherein each aperture is made from a radiation-shielding material.
4. A radiation imaging device to which a variable pin-hole type collimator according to claim 1 is applied.