Variable pin-hole type collimator and radiation imaging device using the same

Patent metadata

Field	Value
Publication number	US-9406412-B2
Application number	US-201414421673-A
Country	US
Kind code	B2
Filing date	Jan 7, 2014
Priority date	Jan 22, 2013
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

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.

First claim

The invention claimed is:

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.

Assignees

• Univ Korea Res & Bus Found
• Korea Univ Res And Business Machines

Inventors

• Lee Hakjae
• Lee Kisung
• Bae Jaekeon

Classifications

• A61B6/4057

  by using radiation sources located in the interior of the body (A61B6/037 takes precedence) · CPC title

• B62J11/00 Primary

  Supporting arrangements specially adapted for fastening specific devices to cycles, e.g. supports for attaching maps · CPC title

• G01T1/1648

  Ancillary equipment for scintillation cameras, e.g. reference markers, devices for removing motion artifacts, calibration devices (adapted for flow studies G01T1/1647) · CPC title

• A61B6/4258

  for detecting non x-ray radiation, e.g. gamma radiation (A61B6/037 takes precedence) · CPC title

• G21K1/046 Primary

  varying the contour of the field, e.g. multileaf collimators · CPC title