KR20130043405A - Method of obtaining x-ray image data and system for the same - Google Patents

Abstract

PURPOSE: An X-ray image data obtaining method and a system thereof are provided to easily find a problem area from X-ray image data by changing a pixel value corresponding to a range of the pixel value to a specific color. CONSTITUTION: An X-ray image data obtaining device determines a basic area by using a frame for selecting a specific area from X-ray image data(S10). The device generates a histogram by using a pixel value of the determined area(S20). The device determines a range of a change target pixel value from among pixel values of the X-ray image data by using the histogram(S30). The device changes and displays the pixel value included in the range(S40,S50). [Reference numerals] (AA) Start; (BB) End; (S10) Determining an area corresponding to a frame; (S20) Generating a histogram using the pixel value of the area; (S30) Determining a pixel value range to which the change of color is applied; (S40) Changing pixel values included in the range; (S50) Displaying by displaying with changed color;

Description

X-ray image data acquisition method and system for the same {METHOD OF OBTAINING X-RAY IMAGE DATA AND SYSTEM FOR THE SAME}

The present invention relates to a method of acquiring x-ray image data, wherein a pixel value corresponding to a range of pixel values of the x-ray image data is specified based on a range of pixel values to be changed determined in a histogram generated based on a specific region of the x-ray image data. The present invention relates to an x-ray image data acquisition method for acquiring x-ray image data changed in color (or a difference in density between black and white) and a system therefor.

In general, X-ray imaging apparatus has been widely used for a long time in that the accurate state can be seen by displaying the affected part inside the patient's body as an X-ray image. In the conventional x-ray imaging apparatus, the picked-up image is taken on a film and the film is developed and viewed, so that a doctor cannot see the photographing result immediately and it takes at least 2 to 3 days to view through the developing process. Therefore, after the patient has to visit the hospital again two or three days later to listen to the diagnosis results of other doctors, both the doctor and the patient was very cumbersome and uncomfortable.

An apparatus for measuring bone density by transmitting X-rays to bone or adjacent tissues is disclosed in Korean Patent Laid-Open Publication No. 10-2009-28407.

Recently, an X-ray imaging apparatus for converting an X-ray image into visible light and sensing the converted visible light with a sensor such as a solid state imaging device (CCD) is displayed. In the field of medical care, an X-ray imaging apparatus transmits a certain amount of X-ray flux to a part of a body to be photographed, an X-ray sensor measures the transmitted X-rays, records the measured signal in a memory, and stores the body by a computer. It is a photographing device that obtains the X-ray absorption rate of each point in the photographing part and reconstructs it into an image.

On the other hand, the intensity of the X-ray image data reconstructed by the X-ray imaging apparatus, that is, light and dark, is represented by an intensity value representing the intensity of X-rays, and the intensity value is related to the amount of X-ray transmission, that is, the density content of bone, kidney, etc. Represent information. For example, the greater the amount of X-ray transmission, the closer the intensity of the X-ray image data will be to the brighter side. In this case, the density of bone and kidneys will be lower. In this case, it indicates that the bone has a high density content. This may reverse the image.

In medical practice, these x-ray image data can be used to diagnose patients. For example, when the contrast corresponding to the specific part of the X-ray image data is different from that of the normal part, it may be determined that cancer occurs in the specific part and is not normal.

However, the difference in contrast between normal and non-normal portions of the X-ray image data is very small and difficult to distinguish from human vision.If there are many non-normal portions of the X-ray image data, the non-normal portions are the entire X-ray image data. There is a problem in that it takes a long time to determine which part exists in.

An object of the present invention for solving the above problems, the pixel value corresponding to the range of the pixel value of the X-ray image data based on the range of the pixel value to be changed determined in the histogram generated based on the specific region of the X-ray image data An X-ray image data acquisition method for acquiring X-ray image data changed to a specific color and a system therefor are provided.

In accordance with an aspect of the present invention, there is provided a method of acquiring an x-ray image, including determining a region on which a histogram is generated by using a frame for selecting a specific region from the x-ray image data. Generating a histogram representing a distribution of intensity of X-rays using pixel values of the determined region; determining a range of pixel values to which color change is applied among pixel values of X-ray image data using the histogram; Changing the pixel value to a predetermined pixel value when the pixel value of the X-ray image data is included in the range, and when the pixel value of an area corresponding to the frame is included in the range during the movement of the frame on the X-ray image data. The color corresponding to the changed pixel value It can comprise a step in which the display control.

The x-ray image data acquisition apparatus according to an embodiment of the present invention sets a position of a frame for selecting a specific region in the x-ray image data, and a range of pixel values to which a color change is applied among pixel values of the x-ray image data in the histogram. A setting unit for setting a; a histogram generating unit for generating a histogram indicating a distribution of X-ray intensity of the X-ray image data; a changing unit for changing a pixel value of the X-ray image data to a predetermined pixel value; The histogram is controlled to generate a histogram based on pixel values of a display unit displaying an area corresponding to a frame and an area corresponding to a position of a frame set by the setting unit, and the setting is performed among pixel values of the X-ray image data. By wealth The changer is controlled to change the pixel value corresponding to the predetermined range to a predetermined pixel value, and when the pixel value of the region corresponding to the moved frame is included in the range, the color (or the difference in density between black and white) corresponding to the changed pixel value is included. It may be configured to include a control unit for controlling the display unit to display by displaying ().

In the X-ray image data acquisition method and a system therefor according to the present invention as described above, among the pixel values of the X-ray image data based on a range of pixel values to be determined determined in the histogram generated based on a specific area of the X-ray image data. X-ray image data in which the pixel value corresponding to the range is changed to a specific color can be obtained, and a problem area can be easily found in the X-ray image data, which helps the doctor diagnose a patient's disease using the X-ray image data. This has the advantage that it can be.

1 is a block diagram illustrating components of an X-ray image data acquisition system.
2 is a block diagram illustrating components of an X-ray image data acquisition apparatus according to an embodiment of the present invention.
3 is an exemplary diagram of a case in which the x-ray image data acquisition apparatus selects a specific region from the x-ray image data using a frame according to an embodiment of the present invention.
4 is an exemplary diagram illustrating a histogram of a specific region of FIG. 3.
FIG. 5 illustrates an example of changing a pixel value corresponding to a range of pixel values of the X-ray image data to a predetermined pixel value based on the range of pixel values to be determined in the histogram of FIG. 4.
FIG. 6 illustrates an example in which a window value is determined and a pixel value corresponding to a range among pixel values of image data therein is changed to a predetermined pixel value.
7 is a flowchart illustrating a process of acquiring X-ray image data according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating components of an X-ray image data acquisition system.

Referring to FIG. 1, the X-ray image data acquisition system may include an X-ray generator 10, a CCD sensor 30, and an X-ray image data acquisition apparatus 100. The X-ray generator 200 scans the X-ray 20, the CCD sensor or the detector sensor 30 is mounted on the front surface corresponding to the X-ray generator 10, and detects the X-rays generated by the X-ray generator 100. Accumulate and generate X-ray image data.

1 is a mounting space portion (not shown) that can be placed in the middle of the X-ray generating unit 10 and the CCD sensor or detector sensor 30 (not shown) to configure a specific part of the body, for example, finger, wrist, Ankle, forehead, etc. can be settled.

The X-ray image data obtaining apparatus 100 receives the X-ray image data generated by the CCD sensor or the detector sensor 202 and generates a histogram using pixel values of an area corresponding to the frame size provided from the user. Here, the frame is generated in a size smaller than the size of the X-ray image data and used to select, enlarge, and reduce a specific area of the X-ray image data.

Also, the X-ray image data obtaining apparatus 100 receives a range of pixel values to which a color change (or black and white density difference) is applied among the pixel values of the X-ray image data in the histogram from the user, and the reference value among the pixel values of the X-ray image data. The pixel value corresponding to the range is changed to a predetermined pixel value. Here, the predetermined pixel value may be changed to a pixel value of a color, for example, red, yellow, and blue, that is contrasted with a color corresponding to the pixel value of the X-ray image data, or may be designated as a difference in density between black and white.

If the user moves the frame in the X-ray image data, the X-ray image data obtaining apparatus 100 receives a coordinate value corresponding to the frame and displays an area corresponding to the coordinate value. In this case, when displaying the region corresponding to the position of the frame, the X-ray image data obtaining apparatus 100 displays the region having the pixel value corresponding to the reference value range in the color corresponding to the changed pixel value.

      2 is a block diagram illustrating components of an X-ray image data acquisition apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the apparatus 100 for acquiring X-ray image data includes a receiver 110, a setup unit 120, a histogram generator 130, a changer 140, a display 150, and a controller 160. It can be configured to include.

The receiver 110 receives the X-ray image data from the CCD sensor or the detector sensor 30 of FIG. 1, and provides the received X-ray image data to the histogram generator 130.

When the user generates a frame for selecting a specific region from the X-ray image data, the setting unit 120 provides the coordinates of the frame to the controller 160 and selects an icon for the user to reduce or enlarge the region corresponding to the frame. The control unit 160 provides a reduction command of an area corresponding to a frame or an enlargement command of an area corresponding to a frame. Here, the setting unit 120 receives the coordinate value of the frame whenever the user changes the coordinate value of the frame by moving the frame in the X-ray image data.

In addition, when the user selects a range in the histogram for determining a pixel value to be changed in the X-ray image data, the setting unit 120 provides the controller 160 with a pixel value corresponding to the selected range.

The histogram generator 130 receives the X-ray image data from the receiver 110 and receives the coordinate values of the frame set by the setting unit 120 through the controller 160. The histogram generator 130 generates a histogram indicating the distribution of the intensity of the X-rays using the pixel values of the region corresponding to the coordinate values of the frame in the X-ray image data. Here, the histogram is generated by sequentially arranging coordinates of the X-ray image corresponding to the pixel value according to the size of the pixel value of the X-ray image data. A detailed description of the histogram will be described with reference to FIG. 4 to be described later.

The changer 140 changes the pixel value corresponding to the range of the pixel value to be changed among the pixels of the X-ray image data into a predetermined pixel value under the control of the controller 160.

Herein, the range of pixel values to be changed is described in FIG. 4 to be described later, and the range of pixel values to be changed may be directly input by the user.

The display unit 150 displays an area corresponding to the position value of the frame under the control of the controller 160. Here, the display unit 150 enlarges or reduces the area corresponding to the position value of the frame under the control of the controller 160 and displays the enlarged or reduced area.

The controller 160 receives a coordinate value of a frame generated by the user from the setting unit 120, and provides the coordinate value of the received frame to the histogram generator 130, so that the histogram generator 130 receives the X-ray image. Control to generate a histogram using pixel values of the area corresponding to the coordinate values in the data.

In addition, the controller 160 receives a range of pixel values to which a color change (or difference in black and white density) is to be applied among the pixel values of the X-ray image data determined by the user from the setting unit 120, and receives the received pixel value. The range is provided to the changer 140, and the changer 140 controls to change the pixel value corresponding to the range of the pixel value among the pixel values of the X-ray image data to a predetermined pixel value.

As described further above, a range of pixel values for color change (or difference in black and white density) may be directly input by the user.

In addition, the controller 160 receives an enlargement command of an area corresponding to a frame or a reduction command of an area corresponding to a frame from the setting unit 120, and the display unit 150 enlarges or reduces an area corresponding to a frame. Control to display.

FIG. 3 is an exemplary diagram when a x-ray image data acquisition apparatus selects a specific region from the x-ray image data using a frame, and FIG. 4 is an exemplary diagram showing a histogram of the specific region of FIG. 3. 5 is an exemplary diagram of a case in which a pixel value corresponding to a range among pixel values of the X-ray image data is changed to a predetermined pixel value based on the range of pixel values to be changed determined in the histogram of FIG. 4.

3 to 6, the X-ray image data acquisition apparatus 100 receives the X-ray image data 300 from the CCD sensor or the detector sensor 30 of FIG. 1, and receives a frame from the received X-ray image data 300. Move to determine the area 310 to be represented by the histogram. Here, the size of the frame may be changed. When the frame is moved by the user, the color of the area corresponding to the frame is activated and is displayed in a predetermined color representing the active area unlike other areas.

In addition, the X-ray image data obtaining apparatus 100 determines the pixel value of the pixel corresponding to the coordinate value of the graph by displaying the region corresponding to the frame on the graph in order to represent the histogram of the region 310 corresponding to the frame.

For example, an area corresponding to a frame is shown on the graph 320 from (0, 0) to (m, n), and corresponding to (0, 0) when the coordinate value of the graph is (0, 0). The pixel value of the pixel may be determined as 100, and when the coordinate value of the graph 320 is (5, 8), the pixel value of the pixel corresponding to (5, 8) may be determined as 150. Here, m and n may be changed according to the number of pixels of the region corresponding to the frame.

The X-ray image data acquisition apparatus 100 may generate the histogram 400 as shown in FIG. 4 by using the coordinate value and the pixel value of the pixel corresponding to the coordinate value. The X axis of the histogram 400 represents a coordinate value, and there may be, for example, a scale from (0, 0) to (m, n) as many as the coordinate value of the region corresponding to the frame, and the Y axis is a pixel value. A scale from 0 to 255 may be present, which may represent pixel values of the X-ray image data.

The X-ray image data obtaining apparatus 100 arranges the pixel values of the X-ray image data in order from the coordinate values with the smallest pixel values to the coordinate values with the largest pixel values, and arranges the coordinate values on the X-axis, as much as the pixel values corresponding to the coordinate values. A histogram 400 is generated by generating a bar graph with a height of.

For example, the pixel value of the pixel corresponding to the coordinate value (0, 0) of the region corresponding to the frame is 150, the pixel value of the pixel corresponding to the coordinate value (1, 0) is 142, and the coordinate value (0, 1). If the pixel value of the pixel corresponding to) is 140 and the pixel value of the pixel corresponding to the coordinate value (1, 1) is 152, the coordinate value is (0, 1), (1, 0) according to the size of the pixel value. , (0, 0), (1, 1) in the order, coordinate values (0, 1), (1, 0), (0, 0), (1, 1) are placed on the X axis, and the Y axis In the histogram 400, a histogram 400 is generated with heights of pixel values 140, 142, 150, and 152 corresponding to coordinate values (0, 1), (1, 0), (0, 0), and (1, 1). Is generated.

The x-ray image data obtaining apparatus 100 determines a range 410 of pixel values to be changed among pixel values of the x-ray image data. For example, after the user looks at the distribution of the histogram, the user can determine the range (range t1 to t2) by selecting a predetermined position (t1 and t2) on the X axis with the mouse.

 Here, the X-ray image data obtaining apparatus 100 may determine the range of pixel values input by the user through the keyboard or the range of pixel values to be changed by the user through the mouse. no.

After determining the range of pixel values to be changed, the X-ray image data obtaining apparatus 100 changes a pixel value included in the determined range 410 among pixel values of the X-ray image data to a predetermined pixel value. For example, the X-ray image data acquisition apparatus 100 may change a pixel value included in a range 410, for example, 100 to 150, among pixel values of the X-ray image data to a pixel value corresponding to red, and FIG. 5. You can get the same result.

FIG. 6 may determine a separate window for an area represented by changing a pixel value, and may display only pixels in the range (t1 to t2, see the determined range in FIG. 4) among the pixel values inside the window as the changed pixel value. . This allows the user to determine which window to view so as to know what part of the pixel is in the range (t1 to t2 range).

In addition, the determined window of FIG. 6 can be changed by dragging with a mouse so that the user can easily observe a desired area, and the size of the window can be freely changed.

7 is a flowchart illustrating a process of acquiring X-ray image data according to an embodiment of the present invention.

Referring to FIG. 7, the apparatus 100 for obtaining x-ray image data determines an area based on generating a histogram using a frame for selecting a specific area from the x-ray image data (S601). The X-ray image data acquisition apparatus 100 having determined the region on which the histogram is generated, generates a histogram indicating the distribution of the intensity of the X-rays using the pixel value of the determined region (S602), and uses the histogram to determine the histogram. A range of pixel values to which the change of color is applied among the pixel values is determined (S603).

When the pixel value of the X-ray image data is included in the range determined in operation S603, the X-ray image data obtaining apparatus 100 changes the pixel value to a predetermined pixel value in operation S604. Thereafter, when the frame is moved on the X-ray image data by the user, if the pixel value of the area corresponding to the frame is included in the range in step S603, the pixel value is displayed and displayed in the color corresponding to the changed pixel value (S605).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

10: X-ray generator 30: CCD sensor or detector sensor
100: X-ray image data acquisition device
110: receiving unit 120: setting unit
130: histogram generation unit 140: change unit
150: display unit 160: control unit

Claims (12)

In the x-ray image data acquisition method performed by the x-ray image data acquisition device,
Determining a region on which the histogram is generated using a frame for selecting a specific region in the X-ray image data;
Generating a histogram representing a distribution of intensities of X-rays using pixel values of the determined region;
Determining a range of pixel values to which a change is to be applied due to a difference in density between color and black and white among pixel values of the X-ray image data using the histogram;
If the pixel value of the X-ray image data is included in the range, storing the pixel value in a memory unit to change the pixel value into a predetermined pixel value; And
And displaying, when the pixel value is included in the range on the x-ray image data, the pixel value is displayed as a difference in density between the color and the black and white corresponding to the changed pixel value.
The method of claim 1, wherein the predetermined pixel value,
And a value of a color contrasted with a color corresponding to a pixel value of the x-ray image data. The apparatus of claim 1,
And generating a size smaller than the size of the x-ray image data and moving the x-ray image data.
The method of claim 1, wherein the histogram,
The coordinate value of the area is sequentially arranged according to the size of the pixel value, and the x-ray image data acquisition method, characterized in that generated by arranging a bar graph of the length of the pixel value of the coordinate value.
The method of claim 4, wherein
In the histogram generated by arranging a bar graph having a length equal to the pixel value of the coordinate value, a predetermined range (refer to the t1 to t2 range in FIG. 4) is selected to select a range 410 of pixel values to be changed among pixel values of the image data. Determining the x-ray image data.
The method of claim 5, wherein
Selecting a predetermined range from the histogram (refer to the range t1 to t2 in FIG. 4) is determined by selecting a predetermined position (t1 and t2) in the X axis on the histogram by using a mouse.
The method of claim 4, wherein
After the pixel value of the X-ray image data is included in the range, after storing the pixel value to a predetermined pixel value to store in the memory unit,
Creating a separate window;
If the pixel value within the window is included in the range on the x-ray image data, displaying and displaying the difference in density between the color and the black and white corresponding to the changed pixel value (see FIG. 6); Acquisition method.
The method of claim 7, wherein
Moving or resizing the window; The x-ray image data acquisition method further comprises.
A setting unit configured to set a position of a frame for selecting a specific region in the X-ray image data and to set a range of pixel values to which color changes are applied among pixel values of the X-ray image data in the histogram;
A histogram generator for generating a histogram representing a distribution of X-ray intensity of the X-ray image data;
A changer which changes a pixel value of the X-ray image data into a predetermined pixel value;
A display unit configured to display a region corresponding to the moved frame on the X-ray image data; And
The histogram is controlled to generate a histogram based on a pixel value of an area corresponding to a position of a frame set by the setting unit, and a pixel value corresponding to a range set by the setting unit among pixel values of the X-ray image data. An x-ray including a control unit controlling the display unit to change to a predetermined pixel value, and controlling the display unit to display and display the color value corresponding to the changed pixel value when the pixel value of the region corresponding to the moved frame is included in the range. Image data acquisition device.
The method of claim 9, wherein the predetermined pixel value,
And a color value contrasted with a color corresponding to a pixel value of the x-ray image data.
The method of claim 9, wherein the frame,
The x-ray image data acquisition device, characterized in that the generated smaller than the size of the x-ray image data.
The method of claim 9, wherein the histogram,
The coordinate value of the area is sequentially arranged according to the size of the pixel value, and the x-ray image data acquisition device, characterized in that generated by arranging a bar graph of the length of the pixel value of the coordinate value.

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