X-ray imaging device

Patent metadata

Field	Value
Publication number	US-12089978-B2
Application number	US-202217691665-A
Country	US
Kind code	B2
Filing date	Mar 10, 2022
Priority date	Jul 29, 2014
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

Disclosed is an X-ray imaging device, which is capable of providing a tomographic image of an image layer disposed between an axis of rotation and an X-ray source. The imaging device according to the present invention includes a radiography unit having an X-ray source and an X-ray sensor disposed to face each other with a rotating axis therebetween, wherein the X-ray sensor configured to obtain X-ray transmission images, a driver configured to rotate the X-ray source and the X-ray sensor about the rotating axis, and an image processor configured to provide a two-dimensional tomographic image of an image layer disposed between the rotating axis and the X-ray source, by shifting and overlapping the X-ray transmission images after reversing left and right at least some of the X-ray transmission images.

First claim

The invention claimed is:

1. An X-ray imaging device comprising:
a radiography unit having an X-ray source and an X-ray sensor disposed to face each other with a rotating axis therebetween, wherein the X-ray sensor is configured to obtain a plurality of X-ray transmission images of an object disposed between the X-ray source and the X-ray sensor;
a driver configured to rotate the X-ray source and the X-ray sensor about the rotating axis; and
an image processor configured to provide, from the plurality of X-ray transmission images, a two-dimensional tomographic image of an image layer within the object disposed between the rotating axis and the X-ray source,
the image processor further configured to:
flip the image orientation, in a left to right direction, of at least some of the plurality of X-ray transmission images;
realign the flipped X-ray transmission images with each other in a moving direction of the X-ray sensor; and
overlay the realigned, flipped X-ray transmission images on each other, such that the flipped, aligned, and overlaid transmission images overlap partially with each other to create the two-dimensional tomographic image, so that shifted X-ray transmission images are overlapped partially with each other, whereby the two-dimensional tomographic image of the image layer disposed between the rotating axis and the X-ray source is provided.

2. The imaging device of claim 1 , wherein the image layer includes a temporomandibular joint (TMJ) in a posteroanterior view (PA) mode.

3. The imaging device of claim 2 , wherein the postero-anterior view (PA) mode, in which the TMJ of the object is shown as a cross section perpendicular to an extension direction of a jawbone.

4. The imaging device of claim 1 , wherein a distance from the X-ray source to the X-ray sensor is 1000 mm or less.

5. The imaging device of claim 1 , wherein a distance from the X-ray source to the X-ray sensor is between 300 mm or more and is 700 mm.

6. The imaging device of claim 1 , wherein the image processor is further configured to provide a panoramic image of dental arch of the object by using said plurality of X-ray transmission images, wherein the dental arch in disposed between the rotation axis and the X-ray sensor.

Assignees

• Vatech Co Ltd
• Vatech Ewoo Holdings Co Ltd

Inventors

• Choi Sungil

Classifications

• G06T12/10

  Image preprocessing, e.g. calibration, positioning of sources or scatter correction · CPC title

• G01N23/046

  using tomography, e.g. computed tomography [CT] · CPC title

• A61B6/4452

  the source unit and the detector unit being able to move relative to each other · CPC title

• A61B6/5205

  involving processing of raw data to produce diagnostic data · CPC title

• G06T2207/30036

  Dental; Teeth · CPC title