Back scattering inspection systems for human body

Patent metadata

Field	Value
Publication number	US-9366642-B2
Application number	US-201314135840-A
Country	US
Kind code	B2
Filing date	Dec 20, 2013
Priority date	Dec 27, 2012
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A human body back-scattering inspection system is disclosed. The system comprises a flying-spot forming unit configured to output beams of X-rays, a plurality of discrete detectors which are arranged vertically along a human body to be inspected, and a controlling unit coupled to the flying-spot forming unit and the plurality of detectors, and configured to generate a control signal to control the flying-spot forming unit and the plurality of detectors to perform a partition synchronous scan on the human body to be inspected vertically. The present disclosure utilizes the geometry property of the human body back-scattering inspection system, and proposes a multiple-point synchronous scan mechanism which largely accelerates the inspection of human body.

First claim

What is claimed is:

1. A human body back-scattering inspection system comprising:
a flying-spot forming unit configured to output beams of X-rays;
a plurality of detectors arranged discrete from each other vertically along a human body to be inspected, wherein the human body is vertically divided into a plurality of parts corresponding to the plurality of detectors; and
a controlling unit coupled to the flying-spot forming unit and the plurality of detectors, and configured to generate a control signal to control the flying-spot forming unit and the plurality of detectors to scan the plurality of parts of human body to be inspected vertically and synchronously.

2. The human body back-scattering inspection system according to claim 1 , wherein the flying-spot forming unit generates respective beams of X-rays for a plurality of vertical parts of the human body to be inspected, so that synchronous scan for different parts is performed on the human body to be inspected vertically.

3. The human body back-scattering inspection system according to claim 2 , wherein the human body to be inspected is divided into an upper part and a lower part vertically, and the plurality of detectors includes a first detector and a second detector that are arranged discretely from top to bottom,
wherein when a first beam of X-rays scans the upper part, a second beam of X-rays scans the lower part, and the first detector receives a first reflected beam of X-rays and the second detector receives a second reflected beam of X-rays.

4. The human body back-scattering inspection system according to claim 2 , wherein the human body to be inspected is divided into an upper part and a lower part vertically, and the plurality of detectors includes a first detector and a second detector that are arranged discretely from top to bottom,
wherein when a second beam of X-rays scans the upper part, a first beam of X-rays scans the lower part, and the first detector receives a second reflected beam of X-rays and the second detector receives a first reflected beam of X-rays.

5. The human body back-scattering inspection system according to claim 2 , wherein the human body to be inspected is divided into an upper part and a lower part vertically, and the plurality of detectors include a first detector, a second detector and a third detector that are arranged discretely from top to bottom,
wherein when a first beam of X-rays scans the upper part and a second beam of X-rays scans the lower part, a value detected by the first detector is taken as a value of the first reflected beam of X-rays, and a sum of values detected by the second and third detectors is taken as a value of the second reflected beam of X-rays, and
wherein when the first beam of X-rays scans the lower part and the second beam of X-rays scans the upper part, a sum of values detected by the first and second detectors is taken as a value of the second reflected beam of X-rays, and a value detected by the third detector is taken as a value of the first reflected beam of X-rays.

6. The human body back-scattering inspection system according to claim 2 , wherein the human body to be inspected is divided into an upper part and a lower part vertically, and the plurality of detectors include a first detector, a second detector, a third detector and a fourth detector that are arranged discretely from top to bottom,
wherein the upper part includes a first sub-part, a second sub-part and a third sub-part, and wherein when a first beam of X-rays scans the first sub-part, a value detected by the first detector is taken as a value of the first reflected beam of X-rays, and a sum of values detected by the second detector, the third detector and the fourth detector is taken as a value of the second reflected beams of X-rays,
wherein when a first beam of X-rays scans the second sub-part, a sum of values detected by the first detector and the second detector is taken as a value of the first reflected beam of X-rays, and a sum of values detected by the third detector and the fourth detector is taken as a value of the second reflected beams of X-rays, and
wherein when a first beam of X-rays scans the third sub-part, a sum of values detected by the first detector, the second detector and the third detector is taken as a value of the first reflected beam of X-rays, and a value detected by the fourth detector is taken as a value of the second reflected beams of X-rays.

7. The human body back-scattering inspection system according to claim 2 , wherein the flying-spot forming unit has a plurality of holes spirally distributed on a surface of its cylinder, which are configured to output the first beam of X-rays and the second beam of X-rays in a time-sharing manner, and wherein the time for outputting the first beams of X-rays and the time for outputting the second beam of X-rays are different by a half of a cycle of intensity of beams varying over time.

8. The human body back-scattering inspection system according to claim 1 , wherein the flying-spot forming unit includes a first flying-spot forming unit and a second flying-spot forming unit arranged along the vertical direction of the human body to be inspected, which are configured to independently scan the upper part and lower part of the human body to be inspected.

9. The human body back-scattering inspection system according to claim 8 , wherein the first flying-spot forming unit and the second flying-spot forming unit scan the human body to be inspected in the same direction, and have the same scanning speed.

Assignees

• Nuctech Co Ltd
• Univ Tsinghua

Inventors

• Zhao Ziran
• Chen Zhiqiang
• Li Yuanjing
• Wu Wanlong
• Ruan Ming
• Liu Yinong
• Jin Yingkang
• Tang Le
• Wen Yanjie
• Chen Xiuwei
• Ding Fuhua
• Sang Bin
• Shen Zongjun

Classifications

• G01N23/203 Primary

  Measuring back scattering · CPC title

• A61B6/483

  involving scattered radiation · CPC title

• A61B6/4021

  involving movement of the focal spot · CPC title

• A61B6/4266

  characterised by using a plurality of detector units (A61B6/4014 takes precedence) · CPC title

• G01T1/167 Primary

  Measuring radioactive content of objects, e.g. contamination (whole body counters G01T1/163) · CPC title