Image brightness adjustment

Patent metadata

Field	Value
Publication number	US-10383594-B2
Application number	US-201615299482-A
Country	US
Kind code	B2
Filing date	Oct 21, 2016
Priority date	Dec 1, 2015
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

An image brightness adjustment method and an image brightness adjustment device are provided in the present disclosure. A brightness of a fluoroscopic image obtained by irradiating an object with an initial fluoroscopic dose of X-rays is acquired as an initial brightness. A current load corresponding to the initial brightness is determined according to a relationship between image brightness and loads for the initial fluoroscopic dose, where the current load indicates an X-ray blocking ability of the object. Then, a stable fluoroscopic dose corresponding to the current load is determined according to a relationship between load and stable fluoroscopic dose, where the stable fluoroscopic dose is used to obtain a fluoroscopic image of a predetermined brightness for the object.

First claim

The invention claimed is:

1. An image brightness adjustment method, comprising:
acquiring image brightness of a fluoroscopic image as an initial brightness, the fluoroscopic image being obtained by irradiating an object with an initial fluoroscopic dose of X-rays;
determining a current load corresponding to the initial brightness according to a relationship between image brightness and loads being obtained based on the initial fluoroscopic dose, wherein the current load indicates an X-ray blocking ability of the object;
determining a stable fluoroscopic dose corresponding to the current load according to a relationship between loads and stable fluoroscopic dose, wherein the stable fluoroscopic dose is used to obtain a fluoroscopic image of a predetermined brightness for the object; and
irradiating the object with the stable fluoroscopic dose of X-rays.

2. The method according to claim 1 , further comprising:
acquiring image brightness by irradiating a plurality of loads with the initial fluoroscopic dose of X-rays respectively under a non-ABS adjustment mode; and
determining the relationship between image brightness and loads being obtained based on the initial fluoroscopic dose with the plurality of loads and corresponding acquired image brightness.

3. The method according to claim 1 , further comprising:
acquiring a plurality of stable fluoroscopic doses corresponding to a plurality of loads respectively by performing a proportion, integration, and differentiation (PID) adjustment under an ABS adjustment mode; and
determining the relationship between loads and stable fluoroscopic dose based on the loads and corresponding acquired stable fluoroscopic doses.

4. The method according to claim 1 , further comprising:
acquiring a brightness of a fluoroscopic image obtained by irradiating the object with the stable fluoroscopic dose of X-rays as an adjusted brightness; and
when the adjusted brightness is not equal to the predetermined brightness, performing a PID adjustment according to a difference between the adjusted brightness and the predetermined brightness until obtaining a fluoroscopic image of the predetermined brightness with respect to the object.

5. The method according to claim 1 , wherein:
the initial fluoroscopic dose comprises an initial fluoroscopic mA and an initial fluoroscopic kV; and
the stable fluoroscopic dose comprises a stable fluoroscopic kV and a stable fluoroscopic mA.

6. The method according to claim 5 , wherein:
the relationship between loads and stable fluoroscopic dose comprises a relationship between loads and stable fluoroscopic kV; and
determining the stable fluoroscopic dose corresponding to the current load according to the relationship between loads and stable fluoroscopic dose, comprises:
determining a stable fluoroscopic kV corresponding to the current load according to the relationship between loads and stable fluoroscopic kV; and
determining a stable fluoroscopic mA corresponding to the stable fluoroscopic kV according to a conversion relationship between stable fluoroscopic kV and stable fluoroscopic mA.

7. An image brightness adjustment device, the device comprising:
a processor;
a storage medium, which stores executable machine readable instructions for the processor;
wherein, by reading and performing the machine readable instructions, the processor is caused to:
acquire image brightness of a fluoroscopic image as an initial brightness, the fluoroscopic image being obtained by irradiating an object with an initial fluoroscopic dose of X-rays;
determine a current load corresponding to the initial brightness according to a relationship between image brightness and loads being obtained based on the initial fluoroscopic dose, wherein the current load indicates an X-ray blocking ability of the object;
determine a stable fluoroscopic dose corresponding to the current load according to a relationship between loads and stable fluoroscopic dose, wherein the stable fluoroscopic dose is used to obtain a fluoroscopic image of a predetermined brightness for the object; and
irradiate the object with the stable fluoroscopic dose of X-rays.

8. The device according to claim 7 , wherein said machine readable instructions further cause the processor to:
acquire image brightness by irradiating a plurality of loads with the initial fluoroscopic dose of X-rays respectively under a non-ABS adjustment mode; and
determine the relationship between image brightness and loads being based on the initial fluoroscopic dose with the plurality of loads and corresponding acquired image brightness.

9. The device according to claim 7 , wherein said machine readable instructions further cause the processor to:
acquire a plurality of stable fluoroscopic doses corresponding to a plurality of loads respectively by performing a PID adjustment method under an ABS adjustment mode; and
determine the relationship between loads and stable fluoroscopic dose based on the plurality of loads and corresponding acquired stable fluoroscopic doses.

10. The device according to claim 7 , wherein said machine readable instructions further cause the processor to:
acquire a brightness of a fluoroscopic image obtained by irradiating the object with the stable fluoroscopic dose of X-rays as an adjusted brightness; and
when the adjusted brightness is not equal to the predetermined brightness, perform a PID adjustment according to a difference between the adjusted brightness and the predetermined brightness until obtaining a fluoroscopic image of the predetermined brightness with respect to the object.

11. The device according to claim 7 , wherein:
the initial fluoroscopic dose comprises an initial fluoroscopic mA and an initial fluoroscopic kV; and
the stable fluoroscopic dose comprises a stable fluoroscopic kV and a stable fluoroscopic mA.

12. The device according to claim 11 , wherein:
the relationship between loads and stable fluoroscopic dose comprises a relationship between loads and stable fluoroscopic kV; and
when determining the stable fluoroscopic dose corresponding to the current load according to the relationship between loads and stable fluoroscopic dose, said machine readable instructions further cause the processor to:
determine a stable fluoroscopic kV corresponding to the current load according to the relationship between loads and stable fluoroscopic kV; and
determine a stable fluoroscopic mA corresponding to the stable fluoroscopic kV according to a conversion relationship between stable fluoroscopic kV and stable fluoroscopic mA.

Assignees

• Shenyang Neusoft Medical Sys

Inventors

• Wang Dexin

Classifications

• A61B6/545

  involving automatic set-up of acquisition parameters · CPC title

• A61B6/542 Primary

  involving control of exposure · CPC title

• A61B6/52

  Devices using data or image processing specially adapted for radiation diagnosis · CPC title

• A61B6/487

  involving fluoroscopy · CPC title

• A61B6/405

  Source units specially adapted to modify characteristics of the beam during the data acquisition process (A61B6/4021, A61B6/4035 take precedence) · CPC title