Method and system for reducing motion blurring in digital radiography

Patent metadata

Field	Value
Publication number	US-9418405-B2
Application number	US-201214403269-A
Country	US
Kind code	B2
Filing date	May 23, 2012
Priority date	May 23, 2012
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

A method of reducing motion blurring in digital radiography includes capturing at least one temporally coded blurred image of an object generated by using a coded pattern, and generating a de-blurred image from the at least one temporally coded blurred image by using the coded pattern and an estimate of a motion vector of the object. The at least one temporally coded blurred image is captured by using a total amount of generated light corresponding to at least a portion of radiation transmitted by the object. A digital radiography system is also provided.

First claim

The invention claimed is:

1. A method of reducing motion blurring in digital radiography, the method comprising the following steps:
generating at least one temporally coded blurred image of at least one object from radiation generated by an X-Ray generator responsive to a coded pattern;
capturing the at least one temporally coded blurred image through at least one micromirror device; and
generating a de-blurred image from the at least one temporally coded blurred image by using the coded pattern and an estimate of a motion vector of the at least one object.

2. The method according to claim 1 , which further comprises estimating the motion vector by using the at least one temporally coded blurred image, wherein a sum of intensity of the at least one temporally coded blurred image corresponds to an intensity of a total amount of light.

3. The method according to claim 2 , which further comprises generating the at least one temporally coded blurred image by directing the light corresponding to the radiation transmitted by the object onto a plurality of cameras responsive to the coded pattern.

4. The method according to claim 3 , which further comprises generating the de-blurred image by using a plurality of temporally coded blurred images.

5. The method according to claim 1 , which further comprises carrying out the step of controlling the generated radiation by controlling a voltage of an electrode between a cathode and an anode of the X-ray generator responsive to the coded pattern.

6. The method according to claim 1 , which further comprises carrying out the step of generating the at least one temporally coded blurred image by controlling a current supplied to the X-ray generator responsive to the coded pattern.

7. A digital radiography system, comprising:
an imaging module for capturing at least one temporally coded blurred image of an object generated by using a coded pattern, wherein the imaging module includes at least one digital micromirror device that selectively toggles on and off responsive to the coded pattern; and
a processing module executing an algorithm stored in a non-transitory memory internal to the processing module or external to, but operably coupled to, the processing module for generating a de-blurred image from the at least one temporally coded blurred image by using the coded pattern and an estimate of motion of the object;
the at least one temporally coded blurred image being captured by using a total amount of generated light corresponding to at least a portion of radiation transmitted by the object.

8. The system according to claim 7 , wherein said processing module estimates a motion vector by using the at least one temporally coded blurred image, and a sum of intensity of the at least one temporally coded blurred image corresponds to an intensity of a total amount of light.

9. The system according to claim 7 , wherein said imaging module includes a plurality of cameras for capturing a plurality of temporally coded blurred images.

10. The system according to claim 9 , wherein the at least one digital micromirror device includes a plurality of mirrors for directing the light corresponding to the radiation transmitted by the object onto said plurality of cameras.

11. The system according to claim 9 , wherein said processing module generates the de-blurred image by using the plurality of temporally coded blurred images.

12. The system according to claim 7 , which further comprises:
an X-ray generator configured to generate radiation; and
a controller operably coupled to said X-ray generator and controlling the radiation generated by said X-ray generator responsive to the coded pattern for generating the at least one coded blurred image.

13. The system according to claim 12 , wherein:
said X-ray generator includes a cathode, an anode and an electrode disposed between said cathode and said anode;
said controller controls voltage of said electrode responsive to the coded pattern.

14. The system according to claim 12 , wherein said controller controls a current supplied to said X-ray generator responsive to the coded pattern.

Assignees

• Venkatesan Varun Akur
• Issani Siraj
• Methani Chhaya
• Prabhu Vishal
• Siemens Ag

Inventors

• Venkatesan Varun Akur
• Issani Siraj
• Methani Chhaya
• Prabhu Vishal

Classifications

• G06T2207/20201

  Motion blur correction · CPC title

• G06T5/002 Primary

  Physics · mapped topic

• G06T2207/10116

  X-ray image · CPC title

• G06K9/481

  Physics · mapped topic

• G06T5/003

  Physics · mapped topic