WO2022253055A1 - Image magnification method and system for x-ray medical equipment, and storage medium - Google Patents

Image magnification method and system for x-ray medical equipment, and storage medium Download PDF

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Publication number
WO2022253055A1
WO2022253055A1 PCT/CN2022/094803 CN2022094803W WO2022253055A1 WO 2022253055 A1 WO2022253055 A1 WO 2022253055A1 CN 2022094803 W CN2022094803 W CN 2022094803W WO 2022253055 A1 WO2022253055 A1 WO 2022253055A1
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WIPO (PCT)
Prior art keywords
interest
point
region
image
ray
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PCT/CN2022/094803
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French (fr)
Inventor
Hagen Klausmann
Xiaoai Fei
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Siemens Shanghai Medical Equipment Ltd.
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Publication of WO2022253055A1 publication Critical patent/WO2022253055A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00—Geometric image transformations in the plane of the image
    • G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/46—Arrangements for interfacing with the operator or the patient
    • A61B6/461—Displaying means of special interest
    • A61B6/463—Displaying means of special interest characterised by displaying multiple images or images and diagnostic data on one display
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/46—Arrangements for interfacing with the operator or the patient
    • A61B6/461—Displaying means of special interest
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/46—Arrangements for interfacing with the operator or the patient
    • A61B6/467—Arrangements for interfacing with the operator or the patient characterised by special input means
    • A61B6/469—Arrangements for interfacing with the operator or the patient characterised by special input means for selecting a region of interest [ROI]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/44—Constructional features of apparatus for radiation diagnosis
    • A61B6/4429—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units
    • A61B6/4435—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units the source unit and the detector unit being coupled by a rigid structure
    • A61B6/4441—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units the source unit and the detector unit being coupled by a rigid structure the rigid structure being a C-arm or U-arm

Definitions

  • the present invention relates to the field of medical instrument technologies, and in particular, to an image magnification method and system for X-ray medical equipment, and a storage medium.
  • FIG. 1A shows C-arm X-ray medical equipment using an image intensifier as an imaging component, and there is also C-arm X-ray medical equipment using a flat panel detector as an imaging component.
  • Most image intensifiers have an image capture unit (for example, a camera) encapsulated in a housing thereof, where a field of view of the image intensifier is mostly circular, and a field of view of the image capture unit is mostly rectangular (for example, square) .
  • FIG. 1A shows C-arm X-ray medical equipment using an image intensifier as an imaging component, and there is also C-arm X-ray medical equipment using a flat panel detector as an imaging component.
  • Most image intensifiers have an image capture unit (for example, a camera) encapsulated in a housing thereof, where a field of view of the image intensifier is mostly circular, and a field of view of the image capture unit is mostly rectangular (for example, square) .
  • 1B is a schematic diagram of fields of view of an image intensifier and an image capture unit thereof, where a circular region M is a schematic diagram of the field of view of the image intensifier, and a square region N is a schematic diagram of the field of view of the image capture unit.
  • the C-arm X-ray medical equipment shown in FIG. 1A When the C-arm X-ray medical equipment shown in FIG. 1A is used for exposure, if a partial magnified image of an exposure object needs to be obtained, the exposure needs to be stopped, and the exposure is performed again after a system mode is switched to a magnification mode, which is inconvenient in operation and increases a radiation dose to which an inspection object (for example, a patient) is exposed.
  • the foregoing image magnification method may cause a loss of pixels in an image obtained.
  • the magnification effect is mostly achieved by reducing field of view regions, thereby reducing image regions.
  • the present invention provides an image magnification method for X-ray medical equipment.
  • the method includes: selecting a point of interest on an X-ray image of an imaging object obtained by X-ray medical equipment; determining a region of interest based on the point of interest according to a predetermined rule; and clipping the region of interest from the X-ray image and displaying the region of interest.
  • the X-ray image is a rectangular image.
  • the predetermined rule includes: determining whether vertical distances between the point of interest and four sides of the X-ray image are all greater than or equal to a first predetermined threshold; and determining a square region on the X-ray image with the point of interest as a center and twice the first predetermined threshold as a side length if the vertical distances are all greater than or equal to the first predetermined threshold, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • the predetermined rule includes: determining a square region with the point of interest as a vertex and twice a first predetermined threshold as a side length if the point of interest is any vertex of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • the predetermined rule includes: determining a square region on the X-ray image with the point of interest as a center and twice a first predetermined threshold as a side length if the point of interest coincides with a center of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • the predetermined rule includes: a sum of a vertical extension length from the point of interest to a first side of the X-ray image and a vertical extension length from the point of interest to a third side of the X-ray image is equal to twice a first predetermined threshold, the first side and the third side being parallel; a sum of a vertical extension length from the point of interest to a second side of the X-ray image and a vertical extension length from the point of interest to a fourth side of the X-ray image is equal to twice the first predetermined threshold, the second side and the fourth side being parallel, and the first predetermined threshold being a predetermined pixel value; and a square region is determined in the foregoing manner, and the square region is the region of interest.
  • the present invention further provides a computer storage medium, storing program instructions, the program instructions being executable to implement any method described above.
  • the present invention further provides an image magnification system for X-ray medical equipment.
  • the system includes: a receiving unit, configured to receive selection of a point of interest on an X-ray image of an imaging object obtained by X-ray medical equipment; and a processing unit, configured to: determine a region of interest based on the point of interest according to a predetermined rule; and clip the region of interest from the X-ray image and display the region of interest.
  • the X-ray image is a rectangular image.
  • the predetermined rule includes: determining whether vertical distances between the point of interest and four sides of the X-ray image are all greater than or equal to a first predetermined threshold; and determining a square region on the X-ray image with the point of interest as a center and twice the first predetermined threshold as a side length if the vertical distances are all greater than or equal to the first predetermined threshold, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • the predetermined rule includes: determining a square region with the point of interest as a vertex and twice a first predetermined threshold as a side length if the point of interest is any vertex of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • the predetermined rule includes: determining a square region on the X-ray image with the point of interest as a center and twice a first predetermined threshold as a side length if the point of interest coincides with a center of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • the predetermined rule includes: a sum of a vertical extension length from the point of interest to a first side of the X-ray image and a vertical extension length from the point of interest to a third side of the X-ray image is equal to twice a first predetermined threshold, the first side and the third side being parallel; a sum of a vertical extension length from the point of interest to a second side of the X-ray image and a vertical extension length from the point of interest to a fourth side of the X-ray image is equal to twice the first predetermined threshold, the second side and the fourth side being parallel, and the first predetermined threshold being a predetermined pixel value; and a square region is determined in the foregoing manner, and the square region is the region of interest.
  • an operator of X-ray medical equipment only needs to select a point of interest on an X-ray image to obtain a corresponding partial magnified image (that is, a magnified image of a region of interest) on the X-ray image, which not only facilitates the operation of the operator and prevents an inspection object from being exposed to a high radiation dose, but also avoids a pixel loss of the image and realizes the lossless digital magnification of the image of the region of interest.
  • FIG. 1A is a schematic diagram of C-arm X-ray medical equipment using an image intensifier as an imaging component.
  • FIG. 1B is a schematic diagram of fields of view of an image intensifier and an image capture unit thereof.
  • FIG. 2 is a schematic flowchart of an image magnification method for X-ray medical equipment according to an implementation of the present invention.
  • FIG. 3A to FIG. 3D are schematic diagrams of a predetermined rule of an image magnification method for X-ray medical equipment according to a plurality of implementations of the present invention.
  • FIG. 4 is a schematic block diagram of an image magnification system for X-ray medical equipment according to an implementation of the present invention.
  • selecting a point of interest means determining a point of interest on an X-ray image in various manners, including but not limited to, directly tapping to determine the point of interest through a touchscreen, or determining the point of interest through an external device such as a mouse, a keyboard, or a stylus/touch pen.
  • FIG. 2 is a schematic flowchart of an image magnification method for X-ray medical equipment according to an implementation of the present invention. As shown in FIG. 2, an image magnification method 200 for X-ray medical equipment includes the following steps:
  • S220 Determine a region of interest.
  • a point of interest is selected on an X-ray image of an imaging object obtained by X-ray medical equipment.
  • an operator of the X-ray medical equipment for example, medical staff
  • step S220 a region of interest is determined based on the point of interest according to a predetermined rule.
  • the predetermined rule is schematically illustrated below with reference to the accompanying drawings.
  • FIG. 3A to FIG. 3D are schematic diagrams of a predetermined rule of an image magnification method for X-ray medical equipment according to a plurality of implementations of the present invention.
  • the X-ray image being a rectangular image is used for schematic illustration, for example, a square with a pixel value of 4096 ⁇ 4096 (4K ⁇ 4K) , but the present invention is not limited thereto.
  • the predetermined rule may include: determining whether vertical distances between the point of interest and four sides of the X-ray image are all greater than or equal to a first predetermined threshold; and determining a square region on the X-ray image with the point of interest as a center and twice the first predetermined threshold as a side length if the vertical distances are all greater than or equal to the first predetermined threshold, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • first predetermined threshold R1 vertical distances D1, D2, D3, and D4 from a point of interest P on an X-ray image I to four sides of the X-ray image I are all greater than or equal to a first predetermined threshold R1.
  • a square region S (shown by a dotted frame in FIG. 3A) is then determined with the point of interest P as a center and twice the first predetermined threshold R1 as a side length on the X-ray image I.
  • the first predetermined threshold R1 may be a predetermined pixel value, for example, 512. Therefore, the finally formed square region S is a square with a side length of 1024 (pixel value) , and a pixel value thereof is 1024 ⁇ 1024 (1K ⁇ 1K) .
  • the square region S is the region of interest.
  • the predetermined rule may include: determining a square region with the point of interest as a vertex and twice a first predetermined threshold as a side length if the point of interest is any vertex of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • the point of interest P on the X-ray image I is a vertex of the X-ray image I.
  • a square region S (shown by a dotted frame in FIG. 3B) is then determined with the point of interest P as a vertex and twice a first predetermined threshold R1 as a side length.
  • the first predetermined threshold R1 may be a predetermined pixel value, for example, 512. Therefore, the finally formed square region S is a square with a side length of 1024 (pixel value) , and a pixel value thereof is 1024 ⁇ 1024 (1K ⁇ 1K) .
  • the square region S is the region of interest.
  • the predetermined rule may include: determining a square region on the X-ray image with the point of interest as a center and twice a first predetermined threshold as a side length if the point of interest coincides with a center of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • the point of interest P coincides with a center of the X-ray image I.
  • a square region S (shown by a dotted frame in FIG. 3C) is then determined with the point of interest P as a center and twice a first predetermined threshold R1 as a side length on the X-ray image I.
  • the first predetermined threshold R1 may be a predetermined pixel value, for example, 512. Therefore, the finally formed square region S is a square with a side length of 1024 (pixel value) , and a pixel value thereof is 1024 ⁇ 1024 (1K ⁇ 1K) .
  • the square region S is the region of interest.
  • the predetermined rule may include: a sum of a vertical extension length from the point of interest to a first side of the X-ray image and a vertical extension length from the point of interest to a third side of the X-ray image is equal to twice a first predetermined threshold, the first side and the third side being parallel; a sum of a vertical extension length from the point of interest to a second side of the X-ray image and a vertical extension length from the point of interest to a fourth side of the X-ray image is equal to twice the first predetermined threshold, the second side and the fourth side being parallel, and the first predetermined threshold being a predetermined pixel value; and a square region is determined in the foregoing manner, and the square region is the region of interest.
  • a sum of a vertical extension length d1 from the point of interest P to a first side L1 of the X-ray image I and a vertical extension length d3 from the point of interest P to a third side L3 of the X-ray image I is equal to twice a first predetermined threshold R1, the first side L1 and the third side L3 being parallel;
  • a sum of a vertical extension length from the point of interest P to a second side L2 of the X-ray image I and a vertical extension length from the point of interest P to a fourth side L4 of the X-ray image I is equal to twice the first predetermined threshold R1, the second side L2 and the fourth side L4 being parallel, and the first predetermined threshold R1 being a predetermined pixel value; and a square region S (shown by a dotted frame in FIG.
  • the first predetermined threshold R1 may be a predetermined pixel value, for example, 512. Therefore, the finally formed square region S is a square with a side length of 1024 (pixel value) , and a pixel value thereof is 1024 ⁇ 1024 (1K ⁇ 1K) .
  • the square region S is the region of interest.
  • the first predetermined threshold R1 is a pixel value
  • the regions of interest formed by determining the side length based on the predetermined threshold (pixel value) are all squares with a pixel value of 1024 ⁇ 1024 (1K ⁇ 1K) . It is easily understood that, a person skilled in the art can select and set different first predetermined thresholds R1 to determine different regions of interest according to practical application requirements, which are not limited to the examples described above with reference to the accompanying drawings.
  • step S230 the region of interest is clipped from the X-ray image and displayed.
  • an operator of X-ray medical equipment selects a point of interest on an X-ray image to obtain a corresponding partial magnified image (that is, a magnified image of a region of interest) on the X-ray image, which not only facilitates the operation of the operator, but also avoids a pixel loss of the image.
  • the predetermined rule may be any one or a combination of the plurality of specific rules illustrated above.
  • whether the determined point of interest may be used as a special position such as a center point or vertex of the region of interest may be first determined through the predetermined rule illustrated with reference to FIG. 3A to FIG. 3C; and if the point of interest is not at the special position, the region of interest is determined through the predetermined rule illustrated with reference to FIG. 3D.
  • the point of interest may be used as a special position such as a center point or vertex of the region of interest may not be distinguished, but instead the region of interest is directly determined through the predetermined rule illustrated with reference to FIG. 3D. It is easily understood that, the present invention is not limited in this aspect.
  • An image magnification system for X-ray medical equipment provided in the present invention is exemplarily described below with reference to FIG. 4.
  • the content the same as or similar to that in the image magnification method for X-ray medical equipment described above with reference to the accompanying drawings is only briefly described or omitted.
  • an image magnification system 400 for X-ray medical equipment includes a receiving unit 410 and a processing unit 420.
  • the receiving unit 410 is configured to receive selection of a point of interest on an X-ray image of an imaging object obtained by X-ray medical equipment; and the processing unit 420 is configured to: determine a region of interest based on the point of interest according to a predetermined rule; and clip the region of interest from the X-ray image and display the region of interest.
  • the X-ray image may be a rectangular image.
  • the predetermined rule may include: determining whether vertical distances between the point of interest and four sides of the X-ray image are all greater than or equal to a first predetermined threshold; and determining a square region on the X-ray image with the point of interest as a center and twice the first predetermined threshold as a side length if the vertical distances are all greater than or equal to the first predetermined threshold, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • the predetermined rule may include: determining a square region with the point of interest as a vertex and twice a first predetermined threshold as a side length if the point of interest is any vertex of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • the predetermined rule may include: determining a square region on the X-ray image with the point of interest as a center and twice a first predetermined threshold as a side length if the point of interest coincides with a center of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
  • the predetermined rule may include: a sum of a vertical extension length from the point of interest to a first side of the X-ray image and a vertical extension length from the point of interest to a third side of the X-ray image is equal to twice a first predetermined threshold, the first side and the third side being parallel; a sum of a vertical extension length from the point of interest to a second side of the X-ray image and a vertical extension length from the point of interest to a fourth side of the X-ray image is equal to twice the first predetermined threshold, the second side and the fourth side being parallel, and the first predetermined threshold being a predetermined pixel value; and a square region is determined in the foregoing manner, and the square region is the region of interest.
  • the present invention further provides a computer storage medium, storing program instructions, the program instructions being executable to implement any method described above.
  • a system or an apparatus that is equipped with a storage medium may be provided.
  • the storage medium stores software program code that implements functions of any implementation in the foregoing implementations, and a computer (aCPU or an MPU) of the system or the apparatus is enabled to read and execute the program code stored in the storage medium.
  • the program code read from the storage medium can implement the functions in any one of the foregoing implementations, and therefore the program code and the storage medium for storing the program code constitute a part of the present invention.
  • Embodiments of the storage medium for providing the program code may include a floppy disk, a hard disk, a magneto-optical disk, an optical memory (such as a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVD-RAM, a DVD-RW, and a DVD+RW) , a magnetic tape, a non-volatile storage card, and a ROM.
  • the program code may be downloaded from a server computer by using a communication network.
  • an operating system operated in the computer can be made, not only by executing program code read by a computer, but also by using an instruction based on the program code, to implement some or all actual operations, so as to implement functions of any one of the foregoing implementations.
  • the program code read from the storage medium is written into a memory that is disposed in an expansion board inserted in the computer, or written into a memory that is disposed in an expansion unit connected to the computer, and then a CPU or the like that is installed on the expansion board or expansion unit is enabled to execute some or all actual operations based on the instructions of the program code, so as to implement the functions of any one of the foregoing implementations.
  • the present invention provides an image magnification method and system for X-ray medical equipment, and a storage medium.
  • the image magnification method for X-ray medical equipment provided in the present invention includes: selecting a point of interest on an X-ray image of an imaging object obtained by X-ray medical equipment; determining a region of interest based on the point of interest according to a predetermined rule; and clipping the region of interest from the X-ray image and displaying the region of interest.
  • the present invention not only facilitates the operation of the operator and prevents an inspection object from being exposed to a high radiation dose, but also avoids a pixel loss of the image and realizes the lossless digital magnification of the image of the region of interest.

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Abstract

The present invention provides an image magnification method and system for X-ray medical equipment, and a storage medium. According to an implementation, the image magnification method for X-ray medical equipment provided in the present invention includes: selecting a point of interest on an X-ray image of an imaging object obtained by X-ray medical equipment; determining a region of interest based on the point of interest according to a predetermined rule; and clipping the region of interest from the X-ray image and displaying the region of interest. The present invention not only facilitates the operation of the operator and prevents an inspection object from being exposed to a high radiation dose, but also avoids a pixel loss of the image and realizes the lossless digital magnification of the image of the region of interest.

Description

IMAGE MAGNIFICATION METHOD AND SYSTEM FOR X-RAY MEDICAL EQUIPMENT, AND STORAGE MEDIUM TECHNICAL FIELD
The present invention relates to the field of medical instrument technologies, and in particular, to an image magnification method and system for X-ray medical equipment, and a storage medium.
BACKGROUND
Currently, X-ray imaging systems are widely applied to medical examinations and operations. C-arm X-ray medical equipment has been proposed for surgery, referring to FIG. 1A. FIG. 1A shows C-arm X-ray medical equipment using an image intensifier as an imaging component, and there is also C-arm X-ray medical equipment using a flat panel detector as an imaging component. Most image intensifiers have an image capture unit (for example, a camera) encapsulated in a housing thereof, where a field of view of the image intensifier is mostly circular, and a field of view of the image capture unit is mostly rectangular (for example, square) . FIG. 1B is a schematic diagram of fields of view of an image intensifier and an image capture unit thereof, where a circular region M is a schematic diagram of the field of view of the image intensifier, and a square region N is a schematic diagram of the field of view of the image capture unit.
When the C-arm X-ray medical equipment shown in FIG. 1A is used for exposure, if a partial magnified image of an exposure object needs to be obtained, the exposure needs to be stopped, and the exposure is performed again after a system mode is switched to a magnification mode, which is inconvenient in operation and increases a radiation dose to which an inspection object (for example, a patient) is exposed. In addition, the foregoing image magnification method may cause a loss of pixels in an image obtained. For example, in the related art, the magnification effect is mostly achieved by reducing field of view regions, thereby reducing image regions.
Therefore, corresponding solutions need to be provided to resolve the foregoing problems.
SUMMARY
In view of this, the present invention provides an image magnification method for X-ray medical equipment. The method includes: selecting a point of interest on an X-ray image of an imaging object obtained by X-ray medical equipment; determining a region of interest based on the point of interest according to a predetermined rule; and clipping the region of interest from the X-ray image and displaying the region of interest.
The X-ray image is a rectangular image.
The predetermined rule includes: determining whether vertical distances between the point of interest and four sides of the X-ray image are all greater than or equal to a first predetermined threshold; and determining a square region on the X-ray image with the point of interest as a center and twice the first predetermined threshold as a side length if the vertical distances are all greater than or equal to the first predetermined threshold, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
The predetermined rule includes: determining a square region with the point of interest as a vertex and twice a first predetermined threshold as a side length if the point of interest is any vertex of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
The predetermined rule includes: determining a square region on the X-ray image with the point of interest as a center and twice a first predetermined threshold as a side length if the point of interest coincides with a center of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
The predetermined rule includes: a sum of a vertical extension length from the point of interest to a first side of the X-ray image and a vertical extension length from the point of interest to a third side of the X-ray image is equal to twice a first predetermined threshold, the first side and the third side being parallel; a sum of a vertical extension length from the point of interest to a second side of the X-ray image and a vertical extension length from the point of interest to a fourth side of the X-ray image is equal to twice the first predetermined threshold, the second side and the fourth side being parallel, and the first predetermined threshold being a predetermined pixel value; and a square region is determined in the foregoing manner, and the square region is the region of interest.
The present invention further provides a computer storage medium, storing program instructions, the program instructions being executable to implement any method described above.
The present invention further provides an image magnification system for X-ray medical  equipment. The system includes: a receiving unit, configured to receive selection of a point of interest on an X-ray image of an imaging object obtained by X-ray medical equipment; and a processing unit, configured to: determine a region of interest based on the point of interest according to a predetermined rule; and clip the region of interest from the X-ray image and display the region of interest.
The X-ray image is a rectangular image.
The predetermined rule includes: determining whether vertical distances between the point of interest and four sides of the X-ray image are all greater than or equal to a first predetermined threshold; and determining a square region on the X-ray image with the point of interest as a center and twice the first predetermined threshold as a side length if the vertical distances are all greater than or equal to the first predetermined threshold, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
The predetermined rule includes: determining a square region with the point of interest as a vertex and twice a first predetermined threshold as a side length if the point of interest is any vertex of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
The predetermined rule includes: determining a square region on the X-ray image with the point of interest as a center and twice a first predetermined threshold as a side length if the point of interest coincides with a center of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
The predetermined rule includes: a sum of a vertical extension length from the point of interest to a first side of the X-ray image and a vertical extension length from the point of interest to a third side of the X-ray image is equal to twice a first predetermined threshold, the first side and the third side being parallel; a sum of a vertical extension length from the point of interest to a second side of the X-ray image and a vertical extension length from the point of interest to a fourth side of the X-ray image is equal to twice the first predetermined threshold, the second side and the fourth side being parallel, and the first predetermined threshold being a predetermined pixel value; and a square region is determined in the foregoing manner, and the square region is the region of interest.
With the solutions provided in the present invention, an operator of X-ray medical equipment only needs to select a point of interest on an X-ray image to obtain a corresponding partial magnified image (that is, a magnified image of a region of interest) on the X-ray image, which not only facilitates the operation of the operator and prevents an  inspection object from being exposed to a high radiation dose, but also avoids a pixel loss of the image and realizes the lossless digital magnification of the image of the region of interest.
BRIEF DESCRIPTION OF THE DRAWINGS
To enable a person of ordinary skill in the art to understand the foregoing and other features and advantages of the present invention more clearly, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the accompanying drawings:
FIG. 1A is a schematic diagram of C-arm X-ray medical equipment using an image intensifier as an imaging component.
FIG. 1B is a schematic diagram of fields of view of an image intensifier and an image capture unit thereof.
FIG. 2 is a schematic flowchart of an image magnification method for X-ray medical equipment according to an implementation of the present invention.
FIG. 3A to FIG. 3D are schematic diagrams of a predetermined rule of an image magnification method for X-ray medical equipment according to a plurality of implementations of the present invention.
FIG. 4 is a schematic block diagram of an image magnification system for X-ray medical equipment according to an implementation of the present invention.
Reference numerals are as follows:
M, N             Field of view
200              Image magnification method for X-ray medical equipment
S210 to S230     Steps
I                X-ray image
P                Point of interest
D1 to D4         Vertical distance
S                Region of interest
d1 to d4         Vertical extension length
L1 to L4         Sides
400              Image magnification system for X-ray medical equipment
410              Receiving unit
420              Processing unit
DETAILED DESCRIPTION
To have a clearer understanding of the technical features, the objectives, and the effects of the present invention, specific implementations of the present invention are now illustrated with reference to the accompanying drawings, and same reference numerals in the accompanying drawings represent same parts.
In this specification, "schematic" indicates "serving as an example, a case, or description" , and any illustration or implementation described as "schematic" in this specification should not be interpreted as a more preferable or more advantageous technical solution.
For brevity of the accompanying drawings, only parts related to the present invention are schematically shown in the accompanying drawings, and do not represent an actual structure as a product. In addition, for brevity of the accompanying drawings and ease of understanding, for components with same structures or functions in some accompanying drawings, only one of the components is schematically shown or marked.
In this specification, "a/an" or "one" not only indicates "only one" , but also indicates "more than one" . In this specification, "first" , "second" , and the like are only used to distinguish from each other, not to indicate importance, an order, and a premise of mutual existence thereof, and the like.
In this specification, "selecting a point of interest" means determining a point of interest on an X-ray image in various manners, including but not limited to, directly tapping to determine the point of interest through a touchscreen, or determining the point of interest through an external device such as a mouse, a keyboard, or a stylus/touch pen.
First, FIG. 2 is a schematic flowchart of an image magnification method for X-ray medical equipment according to an implementation of the present invention. As shown in FIG. 2, an image magnification method 200 for X-ray medical equipment includes the following steps:
S210: Select a point of interest.;
S220: Determine a region of interest.
S230: Clip and display the region of interest.
In step S210, a point of interest is selected on an X-ray image of an imaging object obtained by X-ray medical equipment. In an embodiment, an operator of the X-ray medical equipment (for example, medical staff) may select the point of interest on the X-ray image, but the present invention is not limited thereto.
In step S220, a region of interest is determined based on the point of interest according to a predetermined rule. The predetermined rule is schematically illustrated below with  reference to the accompanying drawings. FIG. 3A to FIG. 3D are schematic diagrams of a predetermined rule of an image magnification method for X-ray medical equipment according to a plurality of implementations of the present invention. The X-ray image being a rectangular image is used for schematic illustration, for example, a square with a pixel value of 4096×4096 (4K×4K) , but the present invention is not limited thereto.
In an implementation, the predetermined rule may include: determining whether vertical distances between the point of interest and four sides of the X-ray image are all greater than or equal to a first predetermined threshold; and determining a square region on the X-ray image with the point of interest as a center and twice the first predetermined threshold as a side length if the vertical distances are all greater than or equal to the first predetermined threshold, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value. Referring to FIG. 3A, in the implementation shown in FIG. 3A, vertical distances D1, D2, D3, and D4 from a point of interest P on an X-ray image I to four sides of the X-ray image I are all greater than or equal to a first predetermined threshold R1.A square region S (shown by a dotted frame in FIG. 3A) is then determined with the point of interest P as a center and twice the first predetermined threshold R1 as a side length on the X-ray image I. For example, the first predetermined threshold R1 may be a predetermined pixel value, for example, 512. Therefore, the finally formed square region S is a square with a side length of 1024 (pixel value) , and a pixel value thereof is 1024×1024 (1K×1K) . The square region S is the region of interest.
In an optional implementation, the predetermined rule may include: determining a square region with the point of interest as a vertex and twice a first predetermined threshold as a side length if the point of interest is any vertex of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value. Referring to FIG. 3B, in the implementation shown in FIG. 3B, the point of interest P on the X-ray image I is a vertex of the X-ray image I. A square region S (shown by a dotted frame in FIG. 3B) is then determined with the point of interest P as a vertex and twice a first predetermined threshold R1 as a side length. For example, the first predetermined threshold R1 may be a predetermined pixel value, for example, 512. Therefore, the finally formed square region S is a square with a side length of 1024 (pixel value) , and a pixel value thereof is 1024×1024 (1K×1K) . The square region S is the region of interest.
In another implementation, the predetermined rule may include: determining a square region on the X-ray image with the point of interest as a center and twice a first predetermined threshold as a side length if the point of interest coincides with a center of the  X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value. Referring to FIG. 3C, in the implementation shown in FIG. 3C, the point of interest P coincides with a center of the X-ray image I. A square region S (shown by a dotted frame in FIG. 3C) is then determined with the point of interest P as a center and twice a first predetermined threshold R1 as a side length on the X-ray image I. For example, the first predetermined threshold R1 may be a predetermined pixel value, for example, 512. Therefore, the finally formed square region S is a square with a side length of 1024 (pixel value) , and a pixel value thereof is 1024×1024 (1K×1K) . The square region S is the region of interest.
In a further implementation, the predetermined rule may include: a sum of a vertical extension length from the point of interest to a first side of the X-ray image and a vertical extension length from the point of interest to a third side of the X-ray image is equal to twice a first predetermined threshold, the first side and the third side being parallel; a sum of a vertical extension length from the point of interest to a second side of the X-ray image and a vertical extension length from the point of interest to a fourth side of the X-ray image is equal to twice the first predetermined threshold, the second side and the fourth side being parallel, and the first predetermined threshold being a predetermined pixel value; and a square region is determined in the foregoing manner, and the square region is the region of interest. Referring to FIG. 3D, in the implementation shown in FIG. 3D, a sum of a vertical extension length d1 from the point of interest P to a first side L1 of the X-ray image I and a vertical extension length d3 from the point of interest P to a third side L3 of the X-ray image I is equal to twice a first predetermined threshold R1, the first side L1 and the third side L3 being parallel; a sum of a vertical extension length from the point of interest P to a second side L2 of the X-ray image I and a vertical extension length from the point of interest P to a fourth side L4 of the X-ray image I is equal to twice the first predetermined threshold R1, the second side L2 and the fourth side L4 being parallel, and the first predetermined threshold R1 being a predetermined pixel value; and a square region S (shown by a dotted frame in FIG. 3D) is determined in the foregoing manner. For example, the first predetermined threshold R1 may be a predetermined pixel value, for example, 512. Therefore, the finally formed square region S is a square with a side length of 1024 (pixel value) , and a pixel value thereof is 1024×1024 (1K×1K) . The square region S is the region of interest.
In the foregoing illustrated implementations, the first predetermined threshold R1 is a pixel value, and the regions of interest formed by determining the side length based on the predetermined threshold (pixel value) are all squares with a pixel value of 1024×1024  (1K×1K) . It is easily understood that, a person skilled in the art can select and set different first predetermined thresholds R1 to determine different regions of interest according to practical application requirements, which are not limited to the examples described above with reference to the accompanying drawings.
In step S230, the region of interest is clipped from the X-ray image and displayed.
Therefore, an operator of X-ray medical equipment selects a point of interest on an X-ray image to obtain a corresponding partial magnified image (that is, a magnified image of a region of interest) on the X-ray image, which not only facilitates the operation of the operator, but also avoids a pixel loss of the image.
In practice, the predetermined rule may be any one or a combination of the plurality of specific rules illustrated above. For example, in the image magnification method for X-ray medical equipment, whether the determined point of interest may be used as a special position such as a center point or vertex of the region of interest may be first determined through the predetermined rule illustrated with reference to FIG. 3A to FIG. 3C; and if the point of interest is not at the special position, the region of interest is determined through the predetermined rule illustrated with reference to FIG. 3D. Alternatively, in the image magnification method for X-ray medical equipment, whether the point of interest may be used as a special position such as a center point or vertex of the region of interest may not be distinguished, but instead the region of interest is directly determined through the predetermined rule illustrated with reference to FIG. 3D. It is easily understood that, the present invention is not limited in this aspect.
An image magnification system for X-ray medical equipment provided in the present invention is exemplarily described below with reference to FIG. 4. The content the same as or similar to that in the image magnification method for X-ray medical equipment described above with reference to the accompanying drawings is only briefly described or omitted.
In the implementation shown in FIG. 4, an image magnification system 400 for X-ray medical equipment includes a receiving unit 410 and a processing unit 420. The receiving unit 410 is configured to receive selection of a point of interest on an X-ray image of an imaging object obtained by X-ray medical equipment; and the processing unit 420 is configured to: determine a region of interest based on the point of interest according to a predetermined rule; and clip the region of interest from the X-ray image and display the region of interest.
In an implementation, the X-ray image may be a rectangular image.
In an implementation, the predetermined rule may include: determining whether vertical  distances between the point of interest and four sides of the X-ray image are all greater than or equal to a first predetermined threshold; and determining a square region on the X-ray image with the point of interest as a center and twice the first predetermined threshold as a side length if the vertical distances are all greater than or equal to the first predetermined threshold, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
In an implementation, the predetermined rule may include: determining a square region with the point of interest as a vertex and twice a first predetermined threshold as a side length if the point of interest is any vertex of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
In an implementation, the predetermined rule may include: determining a square region on the X-ray image with the point of interest as a center and twice a first predetermined threshold as a side length if the point of interest coincides with a center of the X-ray image, the square region being the region of interest, and the first predetermined threshold being a predetermined pixel value.
In an implementation, the predetermined rule may include: a sum of a vertical extension length from the point of interest to a first side of the X-ray image and a vertical extension length from the point of interest to a third side of the X-ray image is equal to twice a first predetermined threshold, the first side and the third side being parallel; a sum of a vertical extension length from the point of interest to a second side of the X-ray image and a vertical extension length from the point of interest to a fourth side of the X-ray image is equal to twice the first predetermined threshold, the second side and the fourth side being parallel, and the first predetermined threshold being a predetermined pixel value; and a square region is determined in the foregoing manner, and the square region is the region of interest.
The present invention further provides a computer storage medium, storing program instructions, the program instructions being executable to implement any method described above. Specifically, a system or an apparatus that is equipped with a storage medium may be provided. The storage medium stores software program code that implements functions of any implementation in the foregoing implementations, and a computer (aCPU or an MPU) of the system or the apparatus is enabled to read and execute the program code stored in the storage medium.
In this case, the program code read from the storage medium can implement the functions in any one of the foregoing implementations, and therefore the program code and the storage medium for storing the program code constitute a part of the present invention.
Embodiments of the storage medium for providing the program code may include a floppy disk, a hard disk, a magneto-optical disk, an optical memory (such as a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVD-RAM, a DVD-RW, and a DVD+RW) , a magnetic tape, a non-volatile storage card, and a ROM. Optionally, the program code may be downloaded from a server computer by using a communication network.
Moreover, it should be clear that an operating system operated in the computer can be made, not only by executing program code read by a computer, but also by using an instruction based on the program code, to implement some or all actual operations, so as to implement functions of any one of the foregoing implementations.
In addition, it can be understood that the program code read from the storage medium is written into a memory that is disposed in an expansion board inserted in the computer, or written into a memory that is disposed in an expansion unit connected to the computer, and then a CPU or the like that is installed on the expansion board or expansion unit is enabled to execute some or all actual operations based on the instructions of the program code, so as to implement the functions of any one of the foregoing implementations.
The present invention provides an image magnification method and system for X-ray medical equipment, and a storage medium. According to an implementation, the image magnification method for X-ray medical equipment provided in the present invention includes: selecting a point of interest on an X-ray image of an imaging object obtained by X-ray medical equipment; determining a region of interest based on the point of interest according to a predetermined rule; and clipping the region of interest from the X-ray image and displaying the region of interest. The present invention not only facilitates the operation of the operator and prevents an inspection object from being exposed to a high radiation dose, but also avoids a pixel loss of the image and realizes the lossless digital magnification of the image of the region of interest.
The foregoing descriptions are merely embodiments of the present invention, but are not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (13)

  1. An image magnification method for X-ray medical equipment, comprising:
    selecting a point of interest on an X-ray image of an imaging object obtained by X-ray medical equipment;
    determining a region of interest based on the point of interest according to a predetermined rule; and
    clipping the region of interest from the X-ray image and displaying the region of interest.
  2. The image magnification method for X-ray medical equipment according to claim 1, wherein the X-ray image is a rectangular image.
  3. The image magnification method for X-ray medical equipment according to claim 2, wherein the predetermined rule comprises:
    determining whether vertical distances between the point of interest and four sides of the X-ray image are all greater than or equal to a first predetermined threshold; and
    determining a square region on the X-ray image with the point of interest as a center and twice the first predetermined threshold as a side length if the vertical distances are all greater than or equal to the first predetermined threshold, the square region being the region of interest, and
    the first predetermined threshold being a predetermined pixel value.
  4. The image magnification method for X-ray medical equipment according to claim 2, wherein the predetermined rule comprises:
    determining a square region with the point of interest as a vertex and twice a first predetermined threshold as a side length if the point of interest is any vertex of the X-ray image, the square region being the region of interest, and
    the first predetermined threshold being a predetermined pixel value.
  5. The image magnification method for X-ray medical equipment according to claim 2, wherein the predetermined rule comprises:
    determining a square region on the X-ray image with the point of interest as a center and twice a first predetermined threshold as a side length if the point of interest coincides with a center of the X-ray image, the square region being the region of interest, and
    the first predetermined threshold being a predetermined pixel value.
  6. The image magnification method for X-ray medical equipment according to claim 2, wherein the predetermined rule comprises:
    a sum of a vertical extension length from the point of interest to a first side of the X-ray image and a vertical extension length from the point of interest to a third side of the X-ray image is equal to twice a first predetermined threshold, the first side and the third side being parallel;
    a sum of a vertical extension length from the point of interest to a second side of the X-ray image and a vertical extension length from the point of interest to a fourth side of the X-ray image is equal to twice the first predetermined threshold, the second side and the fourth side being parallel, and
    the first predetermined threshold being a predetermined pixel value; and
    a square region is determined in the foregoing manner, and the square region is the region of interest.
  7. A computer storage medium, storing program instructions, the program instructions being executable to implement the method according to any one of claims 1 to 6.
  8. An image magnification system for X-ray medical equipment, comprising:
    a receiving unit, configured to receive selection of a point of interest on an X-ray image of an imaging object obtained by X-ray medical equipment; and
    a processing unit, configured to:
    determine a region of interest based on the point of interest according to a predetermined rule; and
    clip the region of interest from the X-ray image and display the region of interest.
  9. The image magnification system for X-ray medical equipment according to claim 8, wherein the X-ray image is a rectangular image.
  10. The image magnification system for X-ray medical equipment according to claim 9, wherein the predetermined rule comprises:
    determining whether vertical distances between the point of interest and four sides of the X-ray image are all greater than or equal to a first predetermined threshold; and
    determining a square region on the X-ray image with the point of interest as a center and twice the first predetermined threshold as a side length if the vertical distances are all greater than or equal to the first predetermined threshold, the square region being the region of interest, and
    the first predetermined threshold being a predetermined pixel value.
  11. The image magnification system for X-ray medical equipment according to claim 9, wherein the predetermined rule comprises:
    determining a square region with the point of interest as a vertex and twice a first  predetermined threshold as a side length if the point of interest is any vertex of the X-ray image, the square region being the region of interest, and
    the first predetermined threshold being a predetermined pixel value.
  12. The image magnification system for X-ray medical equipment according to claim 9, wherein the predetermined rule comprises:
    determining a square region on the X-ray image with the point of interest as a center and twice a first predetermined threshold as a side length if the point of interest coincides with a center of the X-ray image, the square region being the region of interest, and
    the first predetermined threshold being a predetermined pixel value.
  13. The image magnification system for X-ray medical equipment according to claim 9, wherein the predetermined rule comprises:
    a sum of a vertical extension length from the point of interest to a first side of the X-ray image and a vertical extension length from the point of interest to a third side of the X-ray image is equal to twice a first predetermined threshold, the first side and the third side being parallel;
    a sum of a vertical extension length from the point of interest to a second side of the X-ray image and a vertical extension length from the point of interest to a fourth side of the X-ray image is equal to twice the first predetermined threshold, the second side and the fourth side being parallel, and
    the first predetermined threshold being a predetermined pixel value; and
    a square region is determined in the foregoing manner, and the square region is the region of interest.
PCT/CN2022/094803 2021-06-03 2022-05-24 Image magnification method and system for x-ray medical equipment, and storage medium WO2022253055A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120296212A1 (en) * 2010-10-20 2012-11-22 Toshiba Medical Systems Corporation Ultrasound diagnostic apparatus, control method, and image processing apparatus
US20170084031A1 (en) * 2014-07-30 2017-03-23 Olympus Corporation Image processing apparatus
US20190278436A1 (en) * 2014-01-15 2019-09-12 Samsung Electronics Co., Ltd. Medical image providing apparatus and medical image processing method of the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120296212A1 (en) * 2010-10-20 2012-11-22 Toshiba Medical Systems Corporation Ultrasound diagnostic apparatus, control method, and image processing apparatus
US20190278436A1 (en) * 2014-01-15 2019-09-12 Samsung Electronics Co., Ltd. Medical image providing apparatus and medical image processing method of the same
US20170084031A1 (en) * 2014-07-30 2017-03-23 Olympus Corporation Image processing apparatus

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