# US 2017/0281101 A1 · X-ray image forming device

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- Number: US 2017/0281101 A1
- Document ID: US20170281101A1
- Status: Published application
- Kind: A1
- Application number: 15/512,538
- Filed: 2015-09-18
- Published: 2017-10-05
- Earliest claimed: 2014-09-18
- Assignees: VATECH Co., Ltd.; VATECH EWOO Holdings Co., Ltd.
- Applicants: VATECH Co., Ltd.; VATECH EWOO Holdings Co., Ltd.
- Inventors: Sung Il CHOI; Woong BAE
- Web page: https://patentgrep.com/patent/US20170281101A1

## CPC

- A61B 6/51: for dentistry
- A61B 6/4435: {the source unit and the detector unit being coupled by a rigid structure}
- A61B 6/461: {Displaying means of special interest}
- A61B 6/5211: {involving processing of medical diagnostic data}
- G06T 3/4038: Image mosaicing, e.g. composing plane images from plane sub-images
- H05G 1/02: Constructional details
- H05G 1/60: Circuit arrangements for obtaining a series of X-ray photographs or for X-ray cinematography
- A61B 6/032: {Transmission computed tomography [CT]}
- A61B 6/405: {Source units specially adapted to modify characteristics of the beam during the data acquisition process (A61B6/4021, A61B6/4035 take precedence)}
- A61B 6/5205: {involving processing of raw data to produce diagnostic data}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- H05G: X-RAY TECHNIQUE (investigating or analysing materials by the use of X-rays G01N23/00; apparatus for X-ray photography G03B42/02; X-ray tubes H01J35/00; TV systems having X-ray input H04N5/321)

## 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.

## Claims

### 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 3)

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.

### Claim 5 (depends on 1)

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.

### Claim 6 (depends on 1)

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.

### Claim 7 (depends on 1)

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.

### Claim 8 (depends on 1)

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.

### Claim 9 (depends on 8)

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.

### Claim 10 (depends on 1)

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.

### Claim 11 (depends on 10)

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.

### Claim 12 (depends on 1)

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.

### Claim 13 (depends on 1)

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.

### Claim 14 (depends on 13)

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.

### Claim 15

(canceled)

### Claim 16

(canceled)

### Claim 17

(canceled)

### Claim 18

(canceled)

### Claim 19

(canceled)

### Claim 20

(canceled)

### Claim 21

(canceled)

### Claim 22

(canceled)

### Claim 23

(canceled)

### Claim 24

(canceled)

### Claim 25

(canceled)

### Claim 26

(canceled)