Multi-channel static CT device

Patent metadata

Field	Value
Publication number	US-11906447-B2
Application number	US-202117471725-A
Country	US
Kind code	B2
Filing date	Sep 10, 2021
Priority date	Sep 11, 2020
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

A multi-channel static CT device is provided, and the multi-channel static CT device includes: a scanning channel including a plurality of scanning sub-channels; a distributed X-ray source including a plurality of ray emission points arranged around the scanning channel; and a detector module including a plurality of detectors arranged around the scanning channel, wherein the plurality of detectors are arranged corresponding to the plurality of ray emission points.

First claim

What is claimed is:

1. A multi-channel static CT device, comprising:
a scanning channel comprising a plurality of scanning sub-channels, wherein each scanning sub-channel of the plurality of scanning sub-channels comprises a conveying mechanism configured to convey an inspected object;
a distributed X-ray source comprising a plurality of ray emission points arranged around the scanning channel; and
a detector module comprising a plurality of detectors arranged around the scanning channel, wherein the plurality of detectors are arranged corresponding to the plurality of ray emission points,
wherein a part of the plurality of ray emission points corresponding to one of the plurality of scanning sub-channels is operable independently of another part of the plurality of ray emission points corresponding to another one of the plurality of scanning sub-channels, so as to implement a multi-channel detection mode,
wherein the multi-channel detection mode comprises a first detection sub-mode, wherein in the first detection sub-mode, at least two scanning sub-channels among the plurality of scanning sub-channels operate, each of the at least two scanning sub-channels is configured to carry a respective inspected object placed on the each of the at least two scanning sub-channels, and the at least two scanning sub-channels in operation are individually controlled,
wherein the multi-channel detection mode further comprises a second detection sub-mode, wherein in the second detection sub-mode, at least two adjacent scanning sub-channels among the plurality of scanning sub-channels operate, the at least two adjacent scanning sub-channels are configured to carry an inspected object placed on the at least two adjacent scanning sub-channels, the conveying mechanisms in the at least two adjacent scanning sub-channels in operation are uniformly controlled to operate in a same direction and at a same speed, and parts of the plurality of ray emission points corresponding to the at least two adjacent scanning sub-channels operate.

2. The multi-channel static CT device of claim 1 , wherein a variable for individually controlling each scanning sub-channel comprises at least one of:
a conveying speed of the conveying mechanism in the scanning sub-channel, a conveying direction of the conveying mechanism in the scanning sub-channel, a pause of the conveying mechanism in the scanning sub-channel, a forward of the conveying mechanism in the scanning sub-channel, or a reverse of a conveying mechanism in the scanning sub-channel.

3. The multi-channel static CT device of claim 1 , wherein the plurality of ray emission points and the plurality of detectors are located on a plane intersecting a conveying direction of the inspected object.

4. The multi-channel static CT device of claim 3 , wherein the plurality of ray emission points located on the same plane are arranged in a linear shape, an L shape, a U shape, a semicircular shape, an arc shape, a parabola shape, or a curve shape.

5. The multi-channel static CT device of claim 3 , wherein the plurality of detectors located on the same plane are arranged in a linear shape, an L shape, a U shape, a semicircular shape, an arc shape, a parabola shape, or a curve shape.

6. The multi-channel static CT device of claim 1 , wherein the plurality of ray emission points of the X-ray source are distributed on at least two planes intersecting a conveying direction of the inspected object, and a ray emission point among the plurality of ray emission points of the X-ray source and a corresponding detector among the plurality of detectors of the detector module are arranged on a same plane.

7. The multi-channel static CT device of claim 1 , wherein a total coverage angle of the X-ray source is greater than 180°.

8. The multi-channel static CT device of claim 1 , wherein X-ray beams emitted by the plurality of ray emission points of the X-ray source are perpendicular to a conveying direction of the inspected object, or are inclined with respect to the conveying direction of the inspected object.

9. The multi-channel static CT device of claim 1 , further comprising:
a data and image processing system configured to process a signal acquired by the detector module, so as to reconstruct an image of the inspected object in the scanning channel; and
a display device configured to display the image of the inspected object.

10. The multi-channel static CT device of claim 1 , wherein an X-ray beam emitted by the part of the plurality of ray emission points corresponding to one of the plurality of scanning sub-channels is configured to cover an effective scanning region in the corresponding scanning sub-channel, so as to implement a detection of the inspected object in the corresponding scanning sub-channel.

11. The multi-channel static CT device of claim 10 , wherein the part of the plurality of ray emission points corresponding to one of the plurality of scanning sub-channels comprises a single target point configured to emit an X-ray beam, so as to implement a single-view detection of the inspected object in the corresponding scanning sub-channel.

12. The multi-channel static CT device of claim 1 , wherein in the first detection sub-mode, the reconstructed image of the inspected object in the scanning channel is divided into image portions corresponding to respective scanning sub-channels in operation, and the image portions corresponding to respective scanning sub-channels are respectively displayed on different display devices, or displayed in different display regions of a display device.

13. The multi-channel static CT device of claim 1 , wherein in the first detection sub-mode, parts of the plurality of ray emission points corresponding to respective scanning sub-channels in operation emit X-ray beams alternately, so as to avoid a mutual interference between the scanning sub-channels.

14. The multi-channel static CT device of claim 1 , wherein in the second detection sub-mode, X-ray beams emitted by the parts of the plurality of ray emission points corresponding to the at least two scanning sub-channels cover effective scanning regions in the at least two scanning sub-channels, so as to implement a detection of the inspected object in the at least two scanning sub-channels; and
wherein in the second detection sub-mode, the parts of the plurality of ray emission points corresponding to the at least two scanning sub-channels comprise a single target point configured to emit an X-ray beam, so as to implement a single-view detection of the inspected object in the at least two scanning sub-channels.

15. The multi-channel static CT device of claim 1 , wherein the scanning channel comprises two scanning sub-channels.

16. The multi-channel static CT device of claim 15 , wherein an aspect ratio of the scanning channel is not less than 1.5, a total width of the scanning channel is not less than 1 meter, and a height of the scanning channel is not less than 0.6 meters; or
wherein the X-ray source comprises not less than 120 ray emission points.

Assignees

• Nuctech Co Ltd
• Univ Tsinghua

Inventors

• Chen Zhiqiang
• Zhang Li
• Xu Xiaofei
• Shen Le
• Chang Ming
• Tang Hu
• Jin Xin
• Sun Yunda

Classifications

• G01N23/10 Primary

  the material being confined in a container, e.g. in a luggage X-ray scanners · CPC title

• G01N23/046 Primary

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

• G01N23/083

  the radiation being X-rays · CPC title

• G01N2223/1016

  X-ray · CPC title

• G01N2223/204

  source created from radiated target · CPC title