X-ray image forming device

Patent metadata

Field	Value
Publication number	US-2017281101-A1
Application number	US-201515512538-A
Country	US
Kind code	A1
Filing date	Sep 18, 2015
Priority date	Sep 18, 2014
Publication date	Oct 5, 2017
Grant date	—

Abstract

Disclosed is an X-ray image forming device is disclosed. The device includes an X-ray imaging unit including a rotating member rotatable about a rotating shaft and linearly movable, and an X-ray source and an X-ray sensor disposed at opposite ends of the rotating member to face each other with a region of interest therebetween, a penetration data acquisition unit configured to acquire X-ray penetration data from multiple directions crossing through an image layer in the region of interest by controlling the X-ray imaging unit and an image reconstructor configured to generate projection data in a predetermined angle range at each section of the image layer from the X-ray penetration data, and reconstruct a two-dimensional X-ray panoramic image of the image layer based on the projection data.

First claim

1 . An X-ray image forming device comprising:
an X-ray imaging unit including a rotating member rotatable about a rotating shaft and linearly movable, and an X-ray source and an X-ray sensor disposed at opposite ends of the rotating member to face each other with a region of interest therebetween; a penetration data acquisition unit configured to acquire X-ray penetration data from multiple directions crossing through an image layer in the region of interest by controlling the X-ray imaging unit; and an image reconstructor configured to generate projection data in a predetermined angle range at each section of the image layer from the X-ray penetration data, and reconstruct a two-dimensional X-ray panoramic image of the image layer based on the projection data.

2 . The X-ray image forming device of claim 1 , wherein the image reconstructor reconstructs the two-dimensional X-ray panoramic image by backprojecting the projection data at each section of the image layer.

3 . The X-ray image forming device of claim 1 , wherein the predetermined angle range is 10 degrees or more and less than 180 degrees including a normal direction at each section of the image layer.

4 . The X-ray image forming device of claim 3 , wherein the region of interest includes a dental arch, the image layer is within the dental arch, and the predetermined angle range gradually increases from a molar tooth to an anterior tooth.

5 . The X-ray image forming device of claim 1 , wherein the image reconstructor includes an interpolation data generator configured to generate interpolation data in the predetermined angle range at each section of the image layer from the X-ray penetration data and generate the projection data based on both the X-ray penetration data and the interpolation data.

6 . The X-ray image forming device of claim 1 , further comprising:
a projection data compensator configured to constantly compensate a number and a distance of the projection data at each section of the image layer.

7 . The X-ray image forming device of claim 1 , wherein the rotating shaft moves linearly at a constant velocity to acquire the X-ray penetration data.

8 . The X-ray image forming device of claim 1 , wherein the X-ray sensor has a width of 6 mm or more and 100 mm or less.

9 . The X-ray image forming device of claim 8 , wherein the X-ray sensor has a width of 20 mm or more and 70 mm or less.

10 . The X-ray image forming device of claim 1 , wherein the region of interest includes a dental arch, and the rotating member moves linearly along a centerline passing through a center of an anterior tooth of the dental arch at a distance of 0 to 60 mm, to acquire the X-ray penetration data.

11 . The X-ray image forming device of claim 10 , wherein the rotating member moves linearly along the centerline passing through the center of the anterior tooth of the dental arch at a distance of 20 mm to 50 mm, to acquire the X-ray penetration data.

12 . The X-ray image forming device of claim 1 , wherein the rotating member includes at least one condition of three conditions: a first condition that the rotating shaft moves linearly at a constant velocity to acquire the X-ray penetration data; a second condition that the X-ray sensor has a width of 20 mm or more and 50 mm or less; and a third condition that the rotating member moves linearly forwards and backwards along a centerline of the dental arch at a distance of 20 mm to 50 mm to acquire the X-ray penetration data.

13 . The X-ray image forming device of claim 1 , wherein the penetration data acquisition unit controls the X-ray imaging unit such that the X-ray penetration data includes penetration data penetrating through a substantial entire area of the region of interest by respectively penetrating through a part of the region of interest, and the image reconstructor reconstructs a three-dimensional CT image of the entire region of interest based on the X-ray penetration data.

14 . The X-ray image forming device of claim 13 , further comprising:
a display configured to selectively or simultaneously display the two-dimensional panoramic image and the three-dimensional CT image on a screen.

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Assignees

• Vatech Co Ltd
• Vatech Ewoo Holdings Co Ltd

Inventors

• Choi Sung Il
• Bae Woong

Classifications

• A61B6/4435

  the source unit and the detector unit being coupled by a rigid structure · CPC title

• A61B6/461

  Displaying means of special interest · CPC title

• A61B6/405

  Source units specially adapted to modify characteristics of the beam during the data acquisition process (A61B6/4021, A61B6/4035 take precedence) · CPC title

• G06T3/4038

  Image mosaicing, e.g. composing plane images from plane sub-images · CPC title

• A61B6/032

  Transmission computed tomography [CT] · CPC title