# US 2024/0188909 A1 · X-ray diagnosis apparatus and image processing apparatus

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- Number: US 2024/0188909 A1
- Document ID: US20240188909A1
- Status: Published application
- Kind: A1
- Application number: 18/584,941
- Filed: 2024-02-22
- Published: 2024-06-13
- Earliest claimed: 2008-10-27
- Assignees: Canon Medical Systems Corporation
- Applicants: Canon Medical Systems Corporation
- Inventors: Takuya SAKAGUCHI; Kyojiro NAMBU; Hisato TAKEMOTO
- Web page: https://patentgrep.com/patent/US20240188909A1

## CPC

- A61B 6/12: Arrangements for detecting or locating foreign bodies
- A61B 6/4441: {the rigid structure being a C-arm or U-arm}
- A61B 6/461: {Displaying means of special interest}
- A61B 6/486: {involving generating temporal series of image data}
- A61B 6/504: {for diagnosis of blood vessels, e.g. by angiography}
- A61B 6/5205: {involving processing of raw data to produce diagnostic data}
- G06T 5/50: using two or more images, e.g. averaging or subtraction
- G06T 7/0012: {Biomedical image inspection}
- G06T 7/11: Region-based segmentation
- G06T 7/246: using feature-based methods, e.g. the tracking of corners or segments
- A61B 6/481: {involving the use of contrast agents}
- G06T 2207/10116: X-ray image
- G06T 2207/10121: Fluoroscopy
- G06T 2207/20104: Interactive definition of region of interest [ROI]
- G06T 2207/20164: Salient point detection; Corner detection
- G06T 2207/30021: Catheter; Guide wire
- G06T 2207/30048: Heart; Cardiac
- G06T 2207/30052: Implant; Prosthesis
- G06T 2207/30101: Blood vessel; Artery; Vein; Vascular
- G06T 2207/30204: Marker
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

A marker-coordinate detecting unit detects coordinates of a stent marker on a new image when the new image is stored in an image-data storage unit; and then a correction-image creating unit creates a correction image from the new image through, for example, image transformation processing, so as to match up the detected coordinates with reference coordinates that are coordinates of the stent marker already detected by the marker-coordinate detecting unit in a first frame. An image post-processing unit then creates an image for display by performing post-processing on the correction image created by the correction-image creating unit, the post-processing including high-frequency noise reduction filtering-processing, low-frequency component removal filtering-processing, and logarithmic-image creating processing; and then a system control unit performs control of displaying a moving image of an enlarged image of a set region that is set in the image for display, together with an original image.

## Claims

### Claim 1

An image processing apparatus comprising:
memory configured to store X-ray images generated based on X-rays radiated from an X-ray tube and passed through a subject; and
processing circuitry configured:
to detect, each time one of the X-ray images is newly stored in the memory, a position of a feature point of a device retained in the subject on each of the X-ray images;
to generate, each time the position of the feature point is detected, a correction image by performing at least one of image shift and image transformation of a second X-ray image, based on a position of a feature point detected on a first X-ray image and a position of a feature point detected on the second X-ray image, the first X-ray image being generated before the second X-ray image;
to generate, each time the correction image is generated, an addition correction image obtained by adding together the correction image and at least one correction image generated before the correction image; and
to perform control of displaying, each time the addition correction image is generated, the generated addition correction image sequentially.