Medical image processing apparatus, x-ray diagnosis apparatus, and medical image processing method

Patent metadata

Field	Value
Publication number	US-11179125-B2
Application number	US-201916394591-A
Country	US
Kind code	B2
Filing date	Apr 25, 2019
Priority date	Apr 25, 2018
Publication date	Nov 23, 2021
Grant date	Nov 23, 2021

Abstract

A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to sequentially obtain X-ray images. The processing circuitry is configured to sequentially generate average images by using the obtained plurality of X-ray images, in parallel to the obtainment of the X-ray images. The processing circuitry is configured to sequentially generate difference images by performing a difference calculating process between the X-ray images and the average images, in parallel to the obtainment of the X-ray images and the generation of the average images.

First claim

What is claimed is:

1. A medical image processing apparatus comprising:
processing circuitry configured to
sequentially obtain X-ray images;
sequentially generate, every time a new X-ray image is obtained after a start of the obtainment of the X-ray images, average images by using the obtained plurality of X-ray images including the new X-ray image, in parallel to the obtainment of the X-ray images; and
sequentially generate difference images by performing a difference calculating process between the X-ray images and the average images, in parallel to the obtainment of the X-ray images and the generation of the average images.

2. The medical image processing apparatus according to claim 1 , wherein the processing circuitry is further configured to
sequentially generate combined images by combining the difference images with a blood vessel image that is substantially in a same position as the X-ray images, and
exercise control so as to cause the combined images to be sequentially displayed.

3. The medical image processing apparatus according to claim 1 , wherein
when a quantity of the X-ray images used for generating any one of the average images has reached a value, the processing circuitry is configured to stop generating the average images and store, into a storage, the average image generated by using the X-ray images of which the quantity is equal to the value, and
the processing circuitry is configured to perform a difference calculating process using the average image stored in the storage, on X-ray images obtained while exceeding the value.

4. The medical image processing apparatus according to claim 3 , wherein, when an acquisition condition of the X-ray images is changed, the processing circuitry is configured to delete the average image stored in the storage and re-generate an average image by using a plurality of X-ray images obtained after the acquisition condition is changed.

5. The medical image processing apparatus according to claim 4 , wherein, being triggered by the acquisition condition of the X-ray images being changed, the processing circuitry is configured to delete the average image stored in the storage and re-generate an average image by using a plurality of X-ray images obtained after the acquisition condition is changed.

6. The medical image processing apparatus according to claim 4 , wherein, being triggered by acquisition of X-ray images being newly started under a post-change acquisition condition, the processing circuitry is configured to delete the average image stored in the storage and re-generate an average image by using a plurality of X-ray images obtained after the acquisition condition is changed.

7. The medical image processing apparatus according to claim 1 , wherein
when a quantity of the obtained X-ray images has reached a first value, the processing circuitry is configured to stop generating the average images and store, into a storage, an average image generated by using X-ray images that are among the X-ray images of which the quantity is equal to the first value and of which a quantity is equal to a second value as counted from a most recent X-ray image, and
the processing circuitry is configured to perform a difference calculating process using the average image stored in the storage, on X-ray images obtained while exceeding the first value.

8. The medical image processing apparatus according to claim 1 , wherein the processing circuitry is configured to further exercise control so that a framerate used for acquiring the X-ray images is relatively higher for a time period during which the average images are generated.

9. The medical image processing apparatus according to claim 1 , further comprising a storage configured to store therein, as at least one of the average images, a non-contrast-enhanced blood vessel image that was used for generating a blood vessel image being substantially in a same position as the X-ray images, wherein
when the non-contrast-enhanced blood vessel image is not stored in the storage, the processing circuitry is configured to generate the average images, and
when the non-contrast-enhanced blood vessel image is stored in the storage, the processing circuitry is configured to sequentially generate the difference images by performing the difference calculating process between the obtained X-ray images and the non-contrast-enhanced blood vessel image stored in the storage.

10. A medical image processing apparatus comprising:
processing circuitry configured to
obtain a non-contrast-enhanced blood vessel image that was used for generating a blood vessel image;
sequentially obtain X-ray images that are substantially in a same position as a contrast-enhanced blood vessel image that was used for generating the blood vessel image, the X-ray images being images acquired when a medical device is inserted into a blood vessel; and
sequentially generate difference images by performing a difference calculating process between the X-ray images and the non-contrast-enhanced blood vessel image, in parallel to the obtainment of the X-ray images.

11. An X-ray diagnosis apparatus comprising:
processing circuitry configured to
sequentially acquire X-ray images;
sequentially generate, every time a new X-ray image is acquired after a start of acquisition of the X-ray images, average images by using the acquired plurality of X-ray images including the new X-ray image, in parallel to the acquisition of the X-ray images; and
sequentially generate difference images by performing a difference calculating process between the X-ray images and the average images, in parallel to the acquisition of the X-ray images and the generation of the average images.

12. An X-ray diagnosis apparatus comprising:
processing circuitry configured to
acquire a non-contrast-enhanced blood vessel image that was used for generating a blood vessel image, the X-ray images being images acquired when a medical device is inserted into a blood vessel;
sequentially acquire X-ray images that are substantially in a same position as a contrast-enhanced blood vessel image that was used for generating the blood vessel image; and
sequentially generate difference images by performing a difference calculating process between the X-ray images and the non-contrast-enhanced blood vessel image, in parallel to the obtainment of the X-ray images.

13. A medical image processing method comprising:
sequentially obtaining X-ray images;
sequentially generating, every time a new X-ray image is obtained after a start of the obtainment of the X-ray images average images by using the obtained plurality of X-ray images including the new X-ray image, in parallel to the obtainment of the X-ray images; and
sequentially generating difference images by performing a difference calculating process between the X-ray images and the average images, in parallel to the obtainment of the X-ray images and the generation of the average images.

14. The medical image processing method according to claim 13 , comprising acquiring the X-ray images at a framerate relatively higher for a time period during which the average images are generated.

15. The medical image processing method according to claim 13 , further comprising storing, as at least one of the average images, a non-contrast-enhanced blood vessel image that was used for generating a blood vessel image being substantially in a same position as the X-ray images, wherein
when the non-contrast-enhanced blood vessel image is not stored, generating the average images, and
when the non-contrast-enhanced blood vessel image is stored, sequentially generating

Assignees

• Canon Medical Systems Corp

Inventors

• Ohashi Shumpei
• Iijima Yoshiaki
• Shiraishi Kunio

Classifications

• G06T2207/20221

  Image fusion; Image merging · CPC title

• A61B6/4441

  the rigid structure being a C-arm or U-arm · CPC title

• A61B6/487 Primary

  involving fluoroscopy · CPC title

• A61B6/504

  for diagnosis of blood vessels, e.g. by angiography · CPC title

• A61B6/481

  involving the use of contrast agents · CPC title