Mobile radiography system and method for aligning mobile radiography system

Patent metadata

Field	Value
Publication number	US-10517562-B2
Application number	US-201715719079-A
Country	US
Kind code	B2
Filing date	Sep 28, 2017
Priority date	Sep 30, 2016
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

A mobile radiography system is disclosed, which includes a radiation source for radiating a plurality of beams; a detector for detecting the plurality of beams from the radiation source; a controller for determining an angular difference between the radiation source and the detector; and a positioning device mounted with the radiation source for recognizing a position of the detector relative to the radiation source based on the angular difference between the radiation source and the detector to align the radiation source to the detector. A method of aligning a mobile radiography system including a radiation source and a detector is also disclosed.

First claim

What is claimed is:

1. A mobile radiography system, comprising:
a radiation source for radiating a plurality of beams;
a detector for detecting the plurality of beams from the radiation source;
a controller for determining an angular difference between the radiation source and the detector;
a positioning device mounted with the radiation source for recognizing a position of the detector relative to the radiation source based on the angular difference between the radiation source and the detector to align the radiation source to the detector;
two orientation sensors mounted on the radiation source and the detector respectively for determining the angular difference between the radiation source and the detector.

2. The system of claim 1 , wherein the detector comprises at least two spaced apart markers detectable to the positioning device.

3. The system of claim 2 , wherein the at least two spaced apart markers comprise a LED respectively.

4. The system of claim 1 , wherein the positioning device comprises a visual sensor for capturing an image of the detector.

5. A method for aligning a mobile radiography system including a radiation source and a detector, comprising:
determining an angular difference between the radiation source and the detector; recognizing a position of the detector relative to the radiation source based on the angular difference between the radiation source and the detector;
setting a priori model of the detector, producing a perspective transformation of the priori model of the detector based on the angular difference between the radiation source and the detector;
comparing the perspective transformation with the position of the detector; and determining a center area of the detector; and
aligning the radiation source and the detector based on the position of the detector and the angular difference between the radiation source and the detector.

6. The method of claim 5 , wherein recognizing the position of the detector comprises capturing an image of the detector.

7. The method of claim 5 , wherein aligning the radiation source and the detector comprises aligning the center area of the detector with a center of a lightened area indicating the center of the radiation source.

8. The method of claim 5 , wherein determining the angular difference comprises determining an orientation of the radiation source and the detector respectively.

9. The method of claim 5 , comprising displaying the position of the detector relative to the radiation source based on the angular difference between the radiation source and the detector.

10. A method for aligning a mobile radiography system including a radiation source and a detector, comprising:
determining an angular difference between the radiation source and the detector; recognizing a position of the detector relative to the radiation source based on the angular difference between the radiation source and the detector;
recognizing the position of the detector comprises capturing at least two spaced apart markers of the detector;
obtaining a first distance between the at least two spaced apart markers captured by the positioning device, comparing the first distance with a second distance of the at least two spaced apart markers of a perspective transformation of a priori model of the detector based on the angular difference between the radiation source and the detector, determining a distance between the radiation source and the detector; and
aligning the radiation source and the detector based on the position of the detector and the angular difference between the radiation source and the detector.

Assignees

• Gen Electric

Inventors

• Gu Jiajun
• Lai Hao
• Tao Li
• Xu Hao
• Tao Kun

Classifications

• A61B6/4405 Primary

  the apparatus being movable or portable, e.g. handheld or mounted on a trolley · CPC title

• A61B6/547

  involving tracking of position of the device or parts of the device · CPC title

• A61B6/4291

  the detector being combined with a grid or grating · CPC title

• A61B6/4283

  characterised by a detector unit being housed in a cassette · CPC title

• A61B6/08

  Auxiliary means for directing the radiation beam to a particular spot, e.g. using light beams · CPC title