CN115439317A

CN115439317A - Image magnification method, system and storage medium for X-ray medical equipment

Info

Publication number: CN115439317A
Application number: CN202110618640.9A
Authority: CN
Inventors: 哈根·克劳兹曼; 费孝爱
Original assignee: Siemens Shanghai Medical Equipment Ltd
Current assignee: Siemens Shanghai Medical Equipment Ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2022-12-06
Also published as: WO2022253055A1

Abstract

The invention provides an image magnification method, a system and a storage medium for an X-ray medical device. According to one embodiment, the present invention provides an image enlarging method for an X-ray medical apparatus, including: point-selecting a point of interest on an X-ray image of an imaging object acquired by an X-ray medical device; determining a region of interest based on the point of interest with a predetermined rule; and intercepting the region of interest from the X-ray image and displaying the region of interest. The invention is convenient for operators to operate, avoids the high radiation dose of the inspected object, avoids the pixel loss of the image and realizes the lossless digital amplification of the image of the region of interest.

Description

Image magnification method, system and storage medium for X-ray medical equipment

Technical Field

The invention relates to the technical field of medical instruments, in particular to an image amplification method, an image amplification system and a storage medium for X-ray medical equipment.

Background

Currently, X-ray imaging systems are widely used in medical examinations and procedures. A C-arm type X-ray medical apparatus for surgery has been proposed, see fig. 1A. As shown in fig. 1A, there are C-arm type X-ray medical apparatuses using an image intensifier as an imaging part, and there are also C-arm type X-ray medical apparatuses using a flat panel detector as an imaging part. Most image intensifiers have a camera unit (e.g., a camera) enclosed within their housing, where the field of view of the image intensifier is mostly circular and the field of view of the camera unit is mostly rectangular (e.g., square). Referring to fig. 1B, fig. 1B is a schematic view of the image intensifier and its image capturing unit, wherein a circular region M is a schematic view of the image intensifier, and a square region N is a schematic view of the image capturing unit.

When exposure is performed by using the C-arm X-ray medical apparatus shown in fig. 1A, if it is necessary to acquire a locally enlarged image of an exposure object, the exposure needs to be stopped, and the exposure is performed again after the system mode is switched to the enlargement mode, which is inconvenient in operation and increases the dose of radiation to which an inspection object (e.g., a patient) is subjected. Meanwhile, the aforementioned image enlarging method causes loss of pixels of the obtained image. For example, to achieve the magnification effect, the prior art mostly reduces the visual field area, thereby reducing the image area.

Therefore, there is a need to provide a corresponding solution to the above-mentioned problems.

Disclosure of Invention

In view of the above, the present invention provides an image magnifying method for an X-ray medical apparatus, the method comprising: selecting a point of interest on an X-ray image of an imaging object acquired by an X-ray medical device; determining a region of interest based on the point of interest with a predetermined rule; and intercepting the region of interest from the X-ray image and displaying the region of interest.

Wherein the X-ray image is a rectangular image.

Wherein the predetermined rule comprises: determining whether the vertical distances of the interest point from the periphery of the X-ray image are all greater than or equal to a first predetermined threshold; if the first preset threshold value is larger than or equal to the first preset threshold value, a square area is determined on the X-ray image by taking the point of interest as the center and taking two times of the first preset threshold value as the side length, and the square area is the region of interest; wherein the first predetermined threshold is a predetermined pixel value.

Wherein the predetermined rule comprises: if the interest point is any vertex of the X-ray image, determining a square area by taking the interest point as the vertex and taking two times of a first preset threshold value as the side length, wherein the square area is the interest area; wherein the first predetermined threshold is a predetermined pixel value.

Wherein the predetermined rule comprises: if the interest point is coincident with the center of the X-ray image, determining a square area on the X-ray image by taking the interest point as the center and taking two times of a first preset threshold value as the side length, wherein the square area is the interest area; wherein the first predetermined threshold is a predetermined pixel value.

Wherein the predetermined rule comprises: the sum of the vertical extension of the point of interest to a first edge of the X-ray image, which first edge is parallel to a third edge, and the vertical extension of the point of interest to the third edge is equal to twice a first predetermined threshold value; the sum of the vertical extension of the point of interest to a second side of the X-ray image, which second side is parallel to a fourth side, and the vertical extension to the fourth side equals twice the first predetermined threshold value; wherein the first predetermined threshold is a predetermined pixel value; a square region is determined in the above manner, and the square region is the region of interest.

The present invention also proposes a computer storage medium having stored therein program instructions executable to implement any one of the methods described above.

The invention also proposes an image magnification system for an X-ray medical device, the system comprising: a receiving unit that receives a selection of a point of interest on an X-ray image of an imaging object acquired by an X-ray medical apparatus; and a processing unit configured to: determining a region of interest based on the point of interest with a predetermined rule; and intercepting the region of interest from the X-ray image and displaying the region of interest.

Wherein the X-ray image is a rectangular image.

Wherein the predetermined rule comprises: determining whether the vertical distances from the interest point to the periphery of the X-ray image are all larger than or equal to a first preset threshold value; if the first preset threshold value is larger than or equal to the first preset threshold value, a square area is determined on the X-ray image by taking the point of interest as the center and taking two times of the first preset threshold value as the side length, and the square area is the region of interest; wherein the first predetermined threshold is a predetermined pixel value.

Through the solution provided by the invention, the operator of the X-ray medical equipment can obtain the corresponding local amplified image (namely the amplified image of the region of interest) on the X-ray image only by selecting the point of interest on the X-ray image, so that the operation of the operator is facilitated, the high radiation dose of an inspection object is avoided, the pixel loss of the image is also avoided, and the lossless digital amplification of the image of the region of interest is realized.

Drawings

The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail embodiments thereof with reference to the attached drawings in which:

FIG. 1A is a schematic view of a C-arm type X-ray medical apparatus utilizing an image intensifier as an imaging member.

Fig. 1B is a view schematically illustrating the image intensifier and its imaging unit.

Fig. 2 is a schematic flowchart of an image magnification method for an X-ray medical apparatus according to an embodiment of the present invention.

Fig. 3A to 3D are schematic diagrams illustrating predetermined rules of an image enlarging method for an X-ray medical apparatus according to various embodiments of the present invention.

Fig. 4 is a schematic block diagram of an image magnification system for an X-ray medical apparatus according to an embodiment of the present invention.

Wherein the reference numbers are as follows:

m, N visual field

200. Image magnification method for X-ray medical equipment

S210-S230 steps

I X-ray image

P Point of interest

D1-D4 vertical distance

S region of interest

d1-d4 vertical extension

L1-L4 side

400. Image magnification system for X-ray medical equipment

410. Receiving unit

420. Processing unit

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like parts in the various figures.

"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled.

In this document, "a" or "an" means not only "but also" more than one ". In this document, "first", "second", and the like are used only for distinguishing one from another, and do not indicate the degree and order of importance thereof, and the premise that each other exists, and the like.

Herein, "clicking a point of interest" means determining the point of interest on the X-ray image by various means, including, but not limited to, direct point contact determination through a touch screen or determination of the point of interest through an external device such as a mouse, keyboard, stylus/stylus, and the like.

First, see fig. 2. Fig. 2 is a schematic flowchart of an image magnification method for an X-ray medical apparatus according to an embodiment of the present invention. As shown in fig. 2, the image enlarging method 200 for the X-ray medical apparatus includes the steps of:

s210: clicking an interest point;

s220: determining a region of interest; and

s230: and intercepting and displaying the region of interest.

In step S210, a point of interest is point-selected on an X-ray image of an imaging object acquired by an X-ray medical apparatus. In an embodiment, the point of interest may be selected by an operator of the X-ray medical device (e.g., a health care provider) on the X-ray image, but the invention is not limited thereto.

In step S220, a region of interest is determined based on the point of interest with a predetermined rule. The predetermined rules are schematically illustrated in the following with reference to the accompanying drawings. Referring to fig. 3A to 3D, fig. 3A to 3D are schematic views illustrating predetermined rules of an image enlarging method for an X-ray medical apparatus according to various embodiments of the present invention. The X-ray image is schematically illustrated as a rectangular image, such as a square with a pixel value of 4096 × 4096 (4K × 4K), but the present invention is not limited thereto.

In an embodiment, the predetermined rule may include: determining whether the vertical distances from the point of interest to the periphery (four sides) of the X-ray image are all greater than or equal to a first predetermined threshold; if the first preset threshold value is larger than or equal to the first preset threshold value, a square area is determined on the X-ray image by taking the point of interest as the center and taking two times of the first preset threshold value as the side length, and the square area is an interested area; the first predetermined threshold is a predetermined pixel value. Referring to fig. 3A, in the embodiment shown in fig. 3A, the vertical distances D1, D2, D3 and D4 of the point of interest P on the X-ray image I from the periphery of the X-ray image I are each greater than or equal to a first predetermined threshold value R1, and a square region S (shown by a dashed box in fig. 3A) is determined on the X-ray image I with twice the first predetermined threshold value R1 as a side length, centered on the point of interest P. For example, the first predetermined threshold R1 may be a predetermined pixel value, such as 512. Accordingly, the finally formed square region S is a square having a side length of 1024 (pixel value), and has a pixel value of 1024 × 1024 (1K × 1K), which is the region of interest.

In a variant embodiment, the predetermined rules may comprise: if the interest point is any vertex of the X-ray image, determining a square area by taking the interest point as the vertex and taking two times of a first preset threshold value as the side length, wherein the square area is an interest area; wherein the first predetermined threshold is a predetermined pixel value. Referring to fig. 3B, in the embodiment shown in fig. 3B, the point of interest P on the X-ray image I is a vertex of the X-ray image I, and a square region S (shown by a dashed box in fig. 3B) is determined with the point of interest P as a vertex and two times a first predetermined threshold R1 as a side length. For example, the first predetermined threshold R1 may be a predetermined pixel value, such as 512. Accordingly, the finally formed square region S is a square having a side length of 1024 (pixel value), and has a pixel value of 1024 × 1024 (1K × 1K), which is the region of interest.

In other embodiments, the predetermined rules may include: if the interest point is coincident with the center of the X-ray image, determining a square area on the X-ray image by taking the interest point as the center and taking two times of a first preset threshold value as the side length, wherein the square area is an interest area; wherein the first predetermined threshold is a predetermined pixel value. Referring to fig. 3C, in the embodiment shown in fig. 3C, the point of interest P coincides with the center of the X-ray image I, and a square region S (shown by a dashed box in fig. 3C) is determined on the X-ray image I with a side length twice as large as a first predetermined threshold R1, centered on the point of interest P. For example, the first predetermined threshold R1 may be a predetermined pixel value, such as 512. Accordingly, the finally formed square region S is a square having a side length of 1024 (pixel value), and has a pixel value of 1024 × 1024 (1K × 1K), which is the region of interest.

In further embodiments, the predetermined rules may include: the sum of the vertical extent of the point of interest to a first edge of the X-ray image and to a third edge, which first edge is parallel to the third edge, is equal to twice a first predetermined threshold value; the sum of the vertical extension of the point of interest to the second side of the X-ray image and to the fourth side, which second side is parallel to the fourth side, equals twice the first predetermined threshold value; wherein, the first predetermined threshold is a predetermined pixel value; a square region is determined in the above manner, and the square region is an area of interest. Referring to fig. 3D, in the embodiment as shown in fig. 3D, the sum of the vertical extension D1 of the point of interest P to the first side L1 and the vertical extension D3 to the third side L3 of the X-ray image I is equal to twice the first predetermined threshold value R1, wherein the first side L1 is parallel to the third side L3; the sum of the vertical extension of the point of interest P to the second side L2 and to the fourth side L4 of the X-ray image I, where the second side L2 is parallel to the fourth side L4, is equal to twice the first predetermined threshold value R2; wherein, the first predetermined threshold R1 is a predetermined pixel value; a square area S (shown in dashed outline in fig. 3D) is determined in the manner described above. For example, the first predetermined threshold R1 may be a predetermined pixel value, such as 512. Accordingly, the finally formed square region S is a square having a side length of 1024 (pixel value), and has a pixel value of 1024 × 1024 (1K × 1K), which is the region of interest.

In the embodiments illustrated above, the first predetermined threshold value R1 is a pixel value, and the side lengths are determined based on the predetermined threshold value (pixel value) and the regions of interest are each a square having a pixel value of 1024 × 1024 (1K × 1K). It is easily understood that a person skilled in the art can select to set different first predetermined threshold values R1 to determine different regions of interest according to practical application requirements, and is not limited to the above-described examples in connection with the drawings.

In step S230, a region of interest is cut out from the X-ray image and displayed.

Therefore, an operator of the X-ray medical equipment can obtain a corresponding local amplified image (namely an amplified image of the region of interest) on the X-ray image by clicking the point of interest on the X-ray image, so that the operation of the operator is facilitated, and the pixel loss of the image is also avoided.

In practice, the predetermined rule may be any one or combination of the specific rules exemplified above. For example, the image magnification method for the X-ray medical device may first determine whether the determined interest point may be used as a special position such as a center point or a vertex of the region of interest according to a predetermined rule illustrated in conjunction with fig. 3A to 3C, and if the interest point is not located at the special position, determine the region of interest according to the predetermined rule illustrated in conjunction with fig. 3D. Alternatively, the image enlargement method for the X-ray medical apparatus may determine the region of interest directly by a predetermined rule as illustrated in fig. 3D without distinguishing whether the point of interest may be a special position such as a center point or a vertex of the region of interest. It will be readily understood that the invention is not limited in this respect.

The image magnification system for an X-ray medical apparatus according to the present invention will be described in detail with reference to fig. 4. The same or similar contents as those of the image enlarging method for the X-ray medical apparatus described above with reference to the drawings are described only for brevity or omitted.

In the embodiment shown in fig. 4, the image magnification system 400 for an X-ray medical device comprises a receiving unit 410 and a processing unit 420. The receiving unit 410 receives a click of a point of interest on an X-ray image of an imaging object acquired by an X-ray medical apparatus; the processing unit 420 is configured to: determining a region of interest based on the point of interest with a predetermined rule; and intercepting the region of interest from the X-ray image and displaying the region of interest.

In an embodiment, the X-ray image may be a rectangular image.

In an embodiment, the predetermined rule may include: determining whether the vertical distances from the point of interest to the periphery of the X-ray image are all greater than or equal to a first predetermined threshold; if the first preset threshold value and the second preset threshold value are both larger than or equal to the first preset threshold value, a square area is determined on the X-ray image by taking the point of interest as the center and taking two times of the first preset threshold value as the side length, and the square area is the region of interest; the first predetermined threshold is a predetermined pixel value.

In an embodiment, the predetermined rules may include: if the interest point is any vertex of the X-ray image, determining a square area by taking the interest point as the vertex and taking two times of a first preset threshold value as the side length, wherein the square area is an interest area; the first predetermined threshold is a predetermined pixel value.

In an embodiment, the predetermined rule may include: if the interest point coincides with the center of the X-ray image, determining a square area on the X-ray image by taking the interest point as the center and twice of a first preset threshold as the side length, wherein the square area is an interest area; the first predetermined threshold is a predetermined pixel value.

In an embodiment, the predetermined rules may include: the sum of the vertical extent of the point of interest to a first edge of the X-ray image and to a third edge, which first edge is parallel to the third edge, is equal to twice a first predetermined threshold value; the sum of the vertical extension of the point of interest to the second side of the X-ray image and to the fourth side, which second side is parallel to the fourth side, equals twice the first predetermined threshold value; wherein, the first preset threshold value is a preset pixel value; a square region is determined in the above manner, and the square region is the region of interest.

The present invention also provides a computer storage medium having stored therein program instructions executable to implement any of the methods described above. Specifically, a system or an apparatus equipped with a storage medium on which a software program code that realizes the functions of any one of the above-described embodiments is stored may be provided, and a computer (or a CPU or MPU) of the system or the apparatus is caused to read out and execute the program code stored in the storage medium.

In this case, the program code itself read from the storage medium can realize the functions of any of the above-described embodiments, and thus the program code and the storage medium storing the program code constitute a part of the present invention.

Examples of the storage medium for supplying the program code include a flexible disk, hard disk, magneto-optical disk, optical disk (e.g., CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW), magnetic tape, nonvolatile memory card, and ROM. Alternatively, the program code may be downloaded from a server computer by a communications network.

Further, it should be clear that the functions of any of the above-described embodiments may be implemented not only by executing the program code read out by the computer, but also by causing an operating system or the like operating on the computer to perform a part or all of the actual operations based on instructions of the program code.

Further, it is to be understood that the functions of any of the above-described embodiments are realized by writing the program code read out from the storage medium into a memory provided in an expansion board inserted into the computer or into a memory provided in an expansion unit connected to the computer, and then causing a CPU or the like mounted on the expansion board or the expansion unit to perform part or all of the actual operations based on the instructions of the program code.

The invention provides an image amplification method, an image amplification system and a storage medium for an X-ray medical device. According to one embodiment, the present invention provides an image enlargement method for an X-ray medical apparatus, including: selecting a point of interest on an X-ray image of an imaging object acquired by an X-ray medical device; determining a region of interest based on the point of interest with a predetermined rule; and intercepting the region of interest from the X-ray image and displaying the region of interest. The invention is convenient for operators to operate, avoids the high radiation dose of the inspected object, avoids the pixel loss of the image and realizes the lossless digital amplification of the image of the region of interest.

The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An image magnification method for an X-ray medical device, the method comprising:

selecting a point of interest on an X-ray image of an imaging object acquired by an X-ray medical device;

determining a region of interest based on the point of interest with a predetermined rule; and

intercepting the region of interest from the X-ray image and displaying the region of interest.

2. The image magnification method for an X-ray medical device of claim 1 wherein the X-ray image is a rectangular image.

3. The image magnification method for an X-ray medical device of claim 2 wherein the predetermined rule comprises:

determining whether the vertical distances of the interest point from the periphery of the X-ray image are all greater than or equal to a first predetermined threshold; and

if the two points of interest are larger than or equal to the first preset threshold, determining a square area on the X-ray image by taking the two times of the first preset threshold as side lengths by taking the point of interest as a center, wherein the square area is the region of interest;

wherein the first predetermined threshold is a predetermined pixel value.

4. The image magnification method for an X-ray medical device of claim 2 wherein the predetermined rule comprises:

if the interest point is any vertex of the X-ray image, determining a square area by taking the interest point as the vertex and taking two times of a first preset threshold value as the side length, wherein the square area is the interest area;

wherein the first predetermined threshold is a predetermined pixel value.

5. The image magnification method for an X-ray medical device of claim 2 wherein the predetermined rule comprises:

if the interest point is coincident with the center of the X-ray image, determining a square area on the X-ray image by taking the interest point as the center and taking two times of a first preset threshold value as the side length, wherein the square area is the interest area;

wherein the first predetermined threshold is a predetermined pixel value.

6. The image magnification method for an X-ray medical device of claim 2 wherein the predetermined rule comprises:

the sum of the vertical extension of the point of interest to a first edge of the X-ray image, which first edge is parallel to a third edge, and the vertical extension of the point of interest to the third edge is equal to twice a first predetermined threshold value;

the sum of the vertical extension of the point of interest to a second side of the X-ray image, which second side is parallel to a fourth side, and the vertical extension to the fourth side equals twice the first predetermined threshold value;

wherein the first predetermined threshold is a predetermined pixel value;

determining a square region in the above manner, wherein the square region is the region of interest.

7. A computer storage medium having stored therein program instructions executable to implement the method of any one of claims 1-6.

8. An image magnification system for an X-ray medical device, the system comprising:

a receiving unit that receives a selection of a point of interest on an X-ray image of an imaging object acquired by an X-ray medical apparatus; and

a processing unit configured to:

9. The image magnification system for an X-ray medical device of claim 8 wherein the X-ray image is a rectangular image.

10. The image magnification system for an X-ray medical device of claim 9 wherein the predetermined rule comprises:

if the first preset threshold value is larger than or equal to the first preset threshold value, determining a square area on the X-ray image by taking the point of interest as the center and taking two times of the first preset threshold value as the side length, wherein the square area is the region of interest;

wherein the first predetermined threshold is a predetermined pixel value.

11. The image magnification system for an X-ray medical device of claim 9 wherein the predetermined rule comprises:

wherein the first predetermined threshold is a predetermined pixel value.

12. The image magnification system for an X-ray medical device of claim 9 wherein the predetermined rules comprise:

wherein the first predetermined threshold is a predetermined pixel value.

13. The image magnification system for an X-ray medical device of claim 9 wherein the predetermined rules comprise:

the sum of the vertical extension of the point of interest to a second side of the X-ray image, which second side is parallel to a fourth side, and the vertical extension to the fourth side is equal to twice the first predetermined threshold value;

wherein the first predetermined threshold is a predetermined pixel value;

a square region is determined in the above manner, and the square region is the region of interest.