KR101971625B1 - Apparatus and method for processing CT image - Google Patents

Abstract

According to an aspect of the disclosed embodiments, a processor configured to set a window width and a window level for each of a plurality of setting areas in which a window width and a window level are set; A CT image processing apparatus includes a display unit configured to display a screen view indicating a CT image in the plurality of setting regions, wherein the plurality of setting regions have different window levels.

Description

Apparatus and method for processing CT image

The disclosed embodiments relate to a computer program product including a CT image processing apparatus, a CT image processing method, and a computer readable storage medium including instructions for performing the CT image processing method.

CT images may be represented by CT numbers. The CT number is also called the Hounsfield unit (HU) and is a numerical value that indicates radiation permeability. The CT number may be represented by, for example, an integer in the range of -1024 to 3071, and may be represented by 12-bit image data. CT images are often expressed in black and white images using CT numbers or in limited color components. Therefore, for accurate diagnosis, the image should be expressed in a wide range of gradations, but the number of gradations that can be expressed by the display unit may be smaller than the number of CT numbers of the CT image data, which makes it difficult to display the CT image data.

The disclosed embodiments are intended to enable simultaneous identification of portions of two or more objects having different CT number ranges when displaying CT images.

In addition, the disclosed embodiments are for easily adjusting the window width and the window level while the slice section is changed when displaying the CT image.

According to one aspect of the disclosed embodiments,

A display unit for displaying a screen view representing a plurality of CT images corresponding to each of the plurality of setting regions; And

A plurality of window widths and window levels are set for each of the plurality of setting areas of the display unit, and the plurality of converted areas according to window widths and window levels respectively corresponding to the plurality of setting areas. It includes a processing unit for generating a CT image,

The plurality of setting regions have different window levels,

The CT image processing apparatus is provided, wherein the plurality of CT images correspond to the same slice of the same data set.

Each of the plurality of setting areas may correspond to a view port of the display unit.

The CT image processing apparatus further includes an input unit configured to receive a control signal for controlling a screen view, wherein the processing unit is configured to set a rendering method and zooming for the plurality of setting areas based on the control signal. At least one of the value and the slice interval may be changed together.

The plurality of setting areas may correspond to different areas on the display unit defined in one CT image.

The CT image processing apparatus further includes an input unit configured to receive a control signal for setting the plurality of setting regions, wherein the processing unit is further configured to add a setting region, delete a setting region, or set a region based on the control signal. At least one of the area change, the window width change in the setting area, and the window level change in the setting area can be performed.

The CT image processing apparatus may further include a storage configured to store information about a setting area, a window width, and a window level set according to the control signal.

The CT image processing apparatus further includes an input unit configured to receive a control signal for setting the plurality of setting regions, wherein the processing unit includes the same CT image displayed in the setting region selected by the control signal among the plurality of setting regions. Another setting area for displaying data can be created on the screen view.

Window widths and window levels of the plurality of setting regions may be defined differently according to slice sections of the CT image.

Positions and sizes of the plurality of setting regions may be defined differently according to slice sections of the CT image data.

At least one of positions, sizes, window widths, and window levels of the plurality of setting regions may be defined differently according to segmentation of the object represented in the CT image data.

According to another aspect of the disclosed embodiments,

Setting a window width and a window level for each of the plurality of setting regions;

Generating the plurality of CT images converted according to a window width and a window level corresponding to each of the plurality of setting regions; And

Displaying a screen view representing the plurality of CT images corresponding to each of the plurality of setting regions;

The plurality of setting regions have different window levels,

The plurality of CT images corresponding to the same slice of the same data set, a CT image processing method is provided.

According to another aspect of the disclosed embodiments, a computer program product comprising a computer readable storage medium, the storage medium comprising:

Setting a window width and a window level for each of the plurality of setting regions;

Generating the plurality of CT images converted according to a window width and a window level corresponding to each of the plurality of setting regions; And

Instructions for performing an operation of displaying a screen view representing the plurality of CT images corresponding to each of the plurality of setting regions;

The plurality of setting regions have different window levels,

The plurality of CT images correspond to the same slice of the same data set.

According to the disclosed embodiments, when displaying a CT image, there is an effect capable of simultaneously identifying portions of two or more objects having different CT number ranges.

In addition, the disclosed embodiments have an effect of easily adjusting the window width and the window level while the slice section is changed when displaying the CT image.

1 is a schematic diagram of a CT system 100.
2 is a diagram illustrating a structure of a CT system 100 according to the disclosed embodiment.
3 is a diagram illustrating a configuration of the communication unit 132.
4 is a diagram illustrating a structure of a CT image processing apparatus 100a according to an exemplary embodiment.
5 is a diagram illustrating CT numbers of body tissues, organs, substances, etc. according to an exemplary embodiment.
6 is a diagram for describing a CT number and display gray scale, according to an exemplary embodiment.
7 illustrates a display example 710, a transfer curve 730, and a histogram 740 according to an exemplary embodiment.
8 illustrates window widths and window levels of two or more setting areas according to an exemplary embodiment.
9 is a flowchart illustrating a CT image processing method, according to an exemplary embodiment.
10 is a diagram illustrating a screen view, according to an exemplary embodiment.
FIG. 11 is a diagram for describing an operation of adjusting a window width and a window level of the view ports 1012a, 1012b, 1012c, and 1012d, according to an exemplary embodiment.
12 is a diagram illustrating a screen view 1210 displaying a CT image in a plurality of setting areas, according to an exemplary embodiment.
13 is a diagram illustrating a screen view according to an exemplary embodiment.
14 is a block diagram illustrating a CT image processing apparatus 100b according to an exemplary embodiment.
15 is a diagram illustrating an example of generating a setting area according to an exemplary embodiment.
16 is a diagram illustrating an example of generating a setting area according to an exemplary embodiment.
17 is a diagram for describing a process of adjusting a plurality of setting areas, window widths, and window levels, according to an exemplary embodiment.
18 is a diagram for describing a process of adjusting a plurality of setting areas, window widths, and window levels.
19 is a diagram illustrating a GUI screen view, according to an exemplary embodiment.

Advantages and features of the present invention, and methods of achieving them will be apparent with reference to the embodiments described below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Terms used herein will be briefly described and the present invention will be described in detail.

The terms used in the present invention have been selected as widely used general terms as possible in consideration of the functions in the present invention, but this may vary according to the intention or precedent of the person skilled in the art, the emergence of new technologies and the like. In addition, in certain cases, there is also a term arbitrarily selected by the applicant, in which case the meaning will be described in detail in the description of the invention. Therefore, the terms used in the present invention should be defined based on the meanings of the terms and the contents throughout the present invention, rather than the names of the simple terms.

When any part of the specification is to "include" any component, this means that it may further include other components, except to exclude other components unless otherwise stated. In addition, the term "part" as used herein refers to a hardware component, such as software, FPGA or ASIC, and "part" plays certain roles. But wealth is not limited to software or hardware. The 'unit' may be configured to be in an addressable storage medium or may be configured to play one or more processors. Thus, as an example, a "part" refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, procedures, Subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays and variables. The functionality provided within the components and "parts" may be combined into a smaller number of components and "parts" or further separated into additional components and "parts".

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention.

As used herein, "image" may mean multi-dimensional data composed of discrete image elements (eg, pixels in a 2D image and voxels in a 3D image). For example, the image may include a medical image of the object obtained by the CT imaging apparatus.

In the present specification, a “CT (Computed Tomography) image” may mean a composite image of a plurality of X-ray images obtained by photographing an object while rotating about at least one axis of the object.

As used herein, an "object" may be a person or an animal, or part or all of a person or an animal. For example, the subject may include at least one of organs such as the liver, heart, uterus, brain, breast, abdomen, and blood vessels. In addition, the "object" may be a phantom. Phantom means a material having a volume very close to the density and effective atomic number of an organism, and may include a sphere phantom having properties similar to the body.

As used herein, a "user" may be a doctor, a nurse, a clinical pathologist, a medical imaging professional, or the like, and may be a technician who repairs a medical device, but is not limited thereto.

Since the CT system may provide a cross-sectional image of the object, an internal structure of the object (for example, an organ such as a kidney and a lung) may be overlapped with each other, compared to a general X-ray imaging apparatus.

For example, the CT system may provide a relatively accurate cross-sectional image of an object by acquiring and processing image data having a thickness of 2 mm or less several hundred times per second. Conventionally, there has been a problem that only the horizontal cross section of the object is expressed, but it is overcome by the appearance of various image reconstruction techniques as follows. Three-dimensional reconstruction imaging techniques include the following techniques.

SSD (Shade surface display): A technique for displaying only voxels having a certain HU value as an initial three-dimensional imaging technique.

Maximum intensity projection (MIP) / minimum intensity projection (MinIP): A 3D technique showing only those having the highest or lowest HU value among the voxels constituting the image.

VR (volume rendering): A technique that can adjust the color and transmittance of the voxels constituting the image for each region of interest.

Virtual endoscopy: A technique that allows endoscopic observation in three-dimensional images reconstructed by the VR or SSD technique.

MPR (multi planar reformation): An image technique for reconstructing different cross-sectional images. It is possible to reconstruct freedom in the direction desired by the user.

Editing: Various techniques for arranging surrounding voxels to make it easier to observe the point of interest in VR.

VOI (voxel of interest): A technique for representing only a selected area in VR.

Computed tomography (CT) system 100 in accordance with the disclosed embodiments can be described with reference to FIGS. 1 and 2. CT system 100 according to the disclosed embodiments may include various types of devices.

1 is a schematic diagram of a CT system 100. Referring to FIG. 1, the CT system 100 may include a gantry 102, a table 105, an X-ray generator 106, and an X-ray detector 108.

The gantry 102 may include an X-ray generator 106 and an X-ray detector 108.

The object 10 may be located on the table 105.

The table 105 may move in a predetermined direction (eg, at least one of up, down, left, and right) during the CT imaging process. In addition, the table 105 may be tilted or rotated by a predetermined angle in a predetermined direction.

In addition, the gantry 102 may also be inclined by a predetermined angle in a predetermined direction.

2 is a diagram illustrating a structure of a CT system 100 according to the disclosed embodiment.

The CT system 100 according to the disclosed embodiment includes a gantry 102, a table 105, a controller 118, a storage unit 124, an image processor 126, an input unit 128, a display unit 130, and a communication unit. 132 may include.

As described above, the object 10 may be located on the table 105. The table 105 according to the disclosed embodiment may be moved in a predetermined direction (eg, at least one of up, down, left, and right), and the movement may be controlled by the controller 118.

The gantry 102 according to the disclosed embodiment includes a rotation frame 104, an X-ray generator 106, an X-ray detector 108, a rotation driver 110, a data acquisition circuit 116, and a data transmitter 120. ) May be included.

The gantry 102 according to the disclosed embodiment may include a rotatable frame 104 which is rotatable based on a predetermined rotation axis (RA). The rotating frame 104 may also be in the form of a disc.

The rotation frame 104 may include an X-ray generator 106 and an X-ray detector 108 disposed to face each other to have a predetermined field of view (FOV). The rotating frame 104 can also include an anti-scatter grid 114. The anti-scattering grid 114 may be located between the X-ray generator 106 and the X-ray detector 108.

In medical imaging systems, X-ray radiation that reaches the detector (or photosensitive film) includes attenuated primary radiation that forms a useful image, as well as scattered radiation that degrades the image. This is included. An anti-scattering grid can be placed between the patient and the detector (or photosensitive film) in order to transmit most of the main radiation and attenuate the scattered radiation.

For example, anti-scatter grids include strips of lead foil, solid polymer materials or solid polymers and fiber composite materials. It may be configured in the form of alternately stacked space filling material (interspace material) of. However, the shape of the anti-scattering grid is not necessarily limited thereto.

The rotation frame 104 may receive a driving signal from the rotation driver 110 and rotate the X-ray generator 106 and the X-ray detector 108 at a predetermined rotation speed. The rotation frame 104 may receive a driving signal and power from the rotation driver 110 in a contact manner through a slip ring (not shown). In addition, the rotation frame 104 may receive a drive signal and power from the rotation driver 110 through wireless communication.

 The X-ray generator 106 generates an X-ray by receiving a voltage and a current through a high voltage generator (not shown) through a slip ring (not shown) in a power distribution unit (PDU) (not shown). Can be released. When the high voltage generator applies a predetermined voltage (hereinafter referred to as a tube voltage), the X-ray generator 106 may generate X-rays having a plurality of energy spectra corresponding to the predetermined tube voltage. .

The X-rays generated by the X-ray generator 106 may be emitted in a predetermined form by the collimator 112.

The X-ray detector 108 may be positioned to face the X-ray generator 106. The X-ray detector 108 may include a plurality of X-ray detection elements. The single X-ray detection element may form a single channel, but is not necessarily limited thereto.

The X-ray detector 108 may detect an X-ray generated from the X-ray generator 106 and transmitted through the object 10 and generate an electric signal corresponding to the intensity of the detected X-ray.

The X-ray detector 108 may include an indirect method for converting radiation into light and a direct method detector for converting and detecting radiation into direct charge. Indirect X-ray detector can use Scintillator. In addition, the direct X-ray detector can use a photon counting detector. The data acquisitino system (DAS) 116 may be connected to the X-ray detector 108. The electrical signal generated by the X-ray detector 108 may be collected by the DAS 116. The electrical signal generated by the X-ray detector 108 may be collected by the DAS 116 by wire or wirelessly. In addition, the electrical signal generated by the X-ray detector 108 may be provided to an analog / digital converter (not shown) through an amplifier (not shown).

Only some data collected from the X-ray detector 108 may be provided to the image processor 126 according to the slice thickness or the number of slices, or only some data may be selected by the image processor 126.

The digital signal may be provided to the image processor 126 through the data transmitter 120. The digital signal may be transmitted to the image processor 126 by wire or wirelessly through the data transmitter 120.

The controller 118 according to the disclosed embodiment may control the operation of each module of the CT system 100. For example, the controller 118 may include a table 105, a rotation driver 110, a collimator 112, a DAS 116, a storage unit 124, an image processor 126, an input unit 128, and a display unit ( 130, operations of the communication unit 132 and the like may be controlled.

The image processor 126 may receive data (eg, raw data before processing) from the DAS 116 through the data transmitter 120 to perform a process of pre-processing. .

The preprocessing may include, for example, a process of correcting the sensitivity nonuniformity between the channels, a sharp reduction in signal strength, or a process of correcting the loss of a signal due to an X-ray absorber such as metal.

The output data of the image processor 126 may be referred to as raw data or projection data. Such projection data may be stored in the storage unit 124 together with photographing conditions (eg, tube voltage, photographing angle, etc.) at the time of data acquisition.

The projection data may be a set of data values corresponding to the intensity of X-rays passing through the object. For convenience of description, a set of projection data acquired simultaneously at the same photographing angle for all channels is referred to as a projection data set.

The storage unit 124 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (SD, XD memory, etc.) and a RAM. ; Random Access Memory (Static Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM (Programmable Read-Only Memory) magnetic memory, magnetic disk, optical disk It may include at least one type of storage medium.

In addition, the image processor 126 may reconstruct a cross-sectional image of the object by using the obtained projection data set. The cross-sectional image may be a 3D image. In other words, the image processor 126 may generate a 3D image of the object by using a cone beam reconstruction method or the like based on the obtained projection data set.

An external input for an X-ray tomography condition, an image processing condition, or the like may be received through the input unit 128. For example, X-ray tomography conditions may include a plurality of tube voltages, energy values of a plurality of X-rays, imaging protocol selection, image reconstruction method selection, FOV region setting, number of slices, slice thickness, post-image Processing parameter settings, and the like. Also, the image processing condition may include a resolution of an image, attenuation coefficient setting for the image, a combination ratio setting of the image, and the like.

The input unit 128 may include a device for receiving a predetermined input from the outside. For example, the input unit 128 may include a microphone, a keyboard, a mouse, a joystick, a touch pad, a touch fan, a voice, a gesture recognition device, and the like.

The display 130 may display an X-ray photographed image reconstructed by the image processor 126.

The transmission and reception of data, power, and the like between the above-described elements may be performed using at least one of wired, wireless, and optical communication.

The communication unit 132 may communicate with an external device, an external medical device, or the like through the server 134. This will be described later with reference to FIG. 3.

3 is a diagram illustrating a configuration of the communication unit 132.

The communication unit 132 may be connected to the network 301 by wire or wirelessly to perform communication with the external server 134, the medical device 136, or the portable device 138. The communication unit 132 may exchange data with a hospital server or another medical device in a hospital connected through a PACS.

In addition, the communication unit 132 may perform data communication with the portable device 138 or the like according to a digital imaging and communications in medicine (DICOM) standard.

The communication unit 132 may transmit / receive data related to diagnosis of the object through the network 301. In addition, the communication unit 132 may transmit and receive a medical image obtained from the medical device 136, such as an MRI device, an X-ray device.

In addition, the communication unit 132 may receive a diagnosis history or a treatment schedule of the patient from the server 134 and use it for clinical diagnosis of the patient. In addition, the communication unit 132 may perform data communication with the server 134 or the medical device 136 in the hospital, as well as the portable device 138 of the user or patient.

In addition, it is possible to send the information of abnormal condition and quality control status to the system administrator or service representative through the network and to receive feedback on it.

4 is a diagram illustrating a structure of a CT image processing apparatus 100a according to an exemplary embodiment.

The CT image processing apparatus 100a according to the present embodiment includes a processing unit 410 and a display unit 420. The CT image processing apparatus 100a is a device including a processing unit 410 for processing a CT image and a display unit 420 for displaying a CT image, and may be implemented in various forms. The CT image processing apparatus 100a may be implemented, for example, in the form of a CT system, a general purpose computer, a tablet PC, a smartphone, a medical terminal, a medical image information system, and the like. When the CT image processing apparatus 100a is implemented in the form of the CT system 100 illustrated in FIGS. 1 and 2, the processing unit 410 corresponds to the image processing unit 126 of FIG. 2, and the display unit 420 may be It may correspond to the display unit 130 of FIG. 2. An embodiment in which the processor 410 additionally performs the role of the controller 118 of FIG. 2 is also possible.

The processor 410 sets a window width and a window level for each of the plurality of setting areas disposed on the screen view.

The plurality of setting areas are different areas disposed on the screen view. The plurality of setting regions may be determined independently of each other in position and size, and may be set so as not to overlap each other. According to an embodiment, the plurality of setting regions may have regions overlapping in some.

The shape of the plurality of setting regions may have the form of, for example, a region defined by a rectangle or a closed curve.

Each of the plurality of setting regions has a window width and a window level. Each of the plurality of setting regions may have a different window level. The window width of each of the plurality of setting regions may be the same or different.

In addition, the processor 410 may generate display image data from the input CT image data. The CT image data may be expressed in a CT number, and the processor 410 may map each CT number to a brightness value of the display image data, and convert the CT image data into display image data. The relationship between the CT number and the brightness value of the display image data may be defined by a transfer graph, a lookup table, or the like. In the present specification, the relationship between the CT number and the brightness value of the display image data will be described based on the embodiment represented by the conversion graph, but the disclosed embodiments are not limited thereto.

The conversion graph may be defined differently for each of the plurality of setting regions. The conversion graph may be defined according to a window width and a window level defined for each of the plurality of setting regions.

In addition, the processor 410 generates a screen view representing a CT image in the plurality of setting areas and outputs the screen view to the display unit 420.

The display unit 420 displays a screen view representing the CT image in the plurality of setting areas.

The display unit 420 includes a plurality of pixels and displays image data. The display unit 420 may be implemented in the form of, for example, a liquid crystal display, an organic electroluminescent device, an electrophoretic image display, a cathode ray tube (CRT), or the like.

According to an exemplary embodiment, the processor 410 may receive information about the display gray value range and the number of gray levels of the display unit 420 from the display unit 420 or store the information in a predetermined storage medium in advance.

5 is a diagram illustrating CT numbers of body tissues, organs, substances, etc. according to an exemplary embodiment.

The CT number of the CT image data may be referred to as a CT number. Each tissue, organ, or substance in the body has a unique CT number depending on its composition and structure. As such, since each body tissue, device, and substance has a unique CT number, each part of the CT image is displayed separately, and the user may check and diagnose the state of the object through the CT image. The CT number may be expressed as in Equation 1.

Each tissue, organ, or substance of the body may have a CT number as shown in FIG. 5. First, the air can have a CT number around -1000 and water around zero. Lung, fat tissue, breast, etc., which have high air content, may have a low CT number between -1000 and zero. Bone, blood, heart, liver, tumor, etc., which have low air content and are dense, may have a CT number between 0 and 3000. As such, since each body tissue, organ, or substance has a different range of CT numbers, when the diagnosis is performed by using a CT image, a corresponding CT number range corresponding to the body tissue, organ, and substance of interest is used. It is preferable to display the CT image data by setting the window width and the window level.

6 is a diagram for describing a CT number and display gray scale, according to an exemplary embodiment.

CT image data is represented by a CT number. For example, 12-bit CT image data may be represented by 4096 CT numbers, and the CT number of each pixel may be determined as an integer value in the range of -1024 to 3071. However, the display gray level of the display unit 420 may have a smaller gray level value than the number of CT numbers of the CT image data. For example, when the CT number is represented by 12 bits and the display unit 120 is represented by 8 bits, when the display unit 420 displays the CT image data, since the CT number and the display gray value do not match one-to-one, However, some of the CT image data may not be represented.

Due to the difference between the number of the CT number and the display gray scale, when displaying CT image data, a window level and a window width for the CT number can be defined. The window level WL is a representative value for CT numbers belonging to a range of CT numbers that will change the display gradation. For example, the window level WL may be expressed as an intermediate CT number of a range of CT numbers belonging to a corresponding CT number range. The CT number may be set according to the difference in the predicament coefficients. At low window levels, air or fat with low radiation absorption is visible, and at high levels, high radiation absorption materials such as bones are visible.

For convenience of explanation, the CT number range for changing the display gray level is referred to as the CT number range of interest. The window width WW represents the number of CT numbers belonging to a range of CT numbers to change the corresponding display gradation. For example, the CT number range of interest may be defined as window width 700, window level 1000.

7 illustrates a display example 710, a transfer curve 730, and a histogram 740 according to an exemplary embodiment.

According to an embodiment, the correspondence relationship between the CT number and the display gray scale value may be represented by a conversion graph. For example, as illustrated in FIG. 7B, a conversion graph 730 may be defined that represents the relationship between the CT number and the display gray level in a space defined by the horizontal axis as the CT number and the vertical axis as the display gray level.

As shown in FIG. 7B, when the window width WW and window level WL of the CT number range 750 of interest are defined, the CT number range belonging to the CT number range 750 of interest is included. Compared to the CT number range not belonging to the CT number range 750, the slope of the conversion graph may be set to be large. The processor 410 may adjust the inclination of the conversion graph to adjust the ratio of the number of CT numbers and the number of display gray scale values with respect to a predetermined CT number range. Therefore, for the CT number range belonging to the CT number range 750 of interest, different CT numbers of CT image data are displayed with different display gradation values, but for the CT number range not belonging to the CT number range 750 of interest. In other words, different CT numbers of CT image data are represented by the same display gray value, or the difference between the displayed gray value is smaller than the difference of the CT number. Therefore, the CT number range of the CT number range belonging to the CT number range 750 of interest is clearly revealed, while the image data of the CT number range not belonging to the CT number range 750 of interest is represented without the CT number difference. Or a small CT number difference can be expressed. The difference in the displayed gradation values smaller than the CT number difference is called gradation compression.

FIG. 7A illustrates CT image data displayed according to the conversion graph of FIG. 7B. The CT image data of FIG. 7A has the same CT number distribution as the histogram 740 of FIG. 7B. Most of the 8-bit display gradation values are allocated for the CT number range belonging to the CT number range 750 of interest, but a limited number of displays for the CT number ranges R1 and R2 not belonging to the CT number range 750 of interest. Only gradation values are assigned, and gradation compression occurs. Therefore, a part of the CT image data may be displayed in a single gray level even though there is a difference in the CT number. For example, although the CT image data of FIG. 7A is shown to have a high frequency in the range of CT numbers -1000 to -700 in the histogram 740, as shown in FIG. The CT numbers in the corresponding range are all expressed as 0, which is the lowest display grayscale value, and are displayed black in the display image 710 (712 and 314). In addition, despite the image data corresponding to the range of the CT number corresponding to the R2 section in the histogram 740, all the CT numbers in the range are represented by 255, which is the highest display gray level, and are white in the display image 710. Are displayed (716, 718).

8 illustrates window widths and window levels of two or more setting areas according to an exemplary embodiment.

According to the disclosed embodiments, a plurality of setting areas may be set on the screen view, and the plurality of setting areas may have different window levels. For example, the first setting area 820 and the second setting area 822 may have a predetermined CT number difference 812. For example, the minimum CT number 814 of the first setting area 820 and the maximum CT number 816 of the second setting area 822 may have a predetermined CT number difference 812.

Within the CT number range of interest of each setting area, the CT numbers can be continuous and the display gray scale values can be continuous. For example, the CT number range of interest of the first setting area 820 corresponds to the CT number of 650 to 1050 and the display gray scale value of 126 to 254, and the CT number range of the second setting area 822 is It may correspond to a CT number in the range of -950 to -450 and a display gray value of 2 to 124.

Each setting area has a window width WW and a window level WL. For example, the first setting area 820 has a window width WW 700 and a window level WL 1000, and the second setting area 822 has a window width WW 500 and a window level WL −700. Can have

According to one embodiment, the first set area 820 has a window width WW and a window level WL corresponding to the CT number of the lung, and the second set area 822 corresponds to the CT number of the bone. It may have a window width WW and a window level WL. The lung has a low CT number around -700. Bone, on the other hand, has a high CT number around 1000. When CT scans around the lungs, bone tissue such as ribs and vertebrae are expressed along with the lungs. Therefore, if the first setting area 820 is set to correspond to the CT number of the lung and the second setting area 822 is set to correspond to the CT number of the bone, the user can view the CT image of the feh and bone in one screen view. You can check the data. In addition, for each of the lungs and the bones, the CT number difference in each organ can be discernably expressed in one screen view.

According to an embodiment, the CT image data is CT image data photographed using a contrast agent, and the first setting area 820 has a window width and a window level corresponding to the CT number of cancer tissue that absorbs the contrast agent. The second setting area may have a window width and a window level corresponding to the CT number of the soft tissue. Cancer tissues absorb contrast agents very well. Therefore, if a CT scan is performed after the contrast agent is administered to the subject, the cancer tissue absorbed with the contrast agent has a very high CT number. Soft tissues, on the other hand, have low CT numbers below zero. Therefore, the window width and the window level of the first setting region 820 are set to correspond to the CT number of the cancer tissue absorbing the contrast agent, and the window width and the window level of the second setting region 822 to the CT number of the soft tissue. When set to correspond, cancer tissue and soft tissue can be distinguished and viewed on one screen. In addition, for each of the cancer tissue and the soft tissue, the CT number difference in each tissue is expressed in the display image.

9 is a flowchart illustrating a CT image processing method, according to an exemplary embodiment.

Each step of the CT image processing method according to the disclosed embodiments may be performed by an electronic device having a processor capable of processing an image and a display unit. In the present specification, a CT image processing apparatus disclosed herein will be described based on an embodiment of performing a CT image processing method according to the disclosed embodiments. Therefore, the embodiments described with respect to the CT image processing apparatus 100 may be applied to the CT image processing method, and conversely, the embodiments described with respect to the CT image processing method may be applied to the embodiments of the CT image processing apparatus. The CT image processing method according to the disclosed embodiments is performed by the CT image processing apparatus disclosed herein, which is not limited thereto, and may be performed by various types of electronic devices.

The CT image processing apparatus first sets a window width and a window level for each of the plurality of setting regions (S902). Each of the plurality of setting regions has a different window level.

Next, the CT image processing apparatus displays a screen view representing the CT image in the plurality of setting areas (S904). The plurality of setting areas may be set to different areas on the screen view, and their positions, sizes, shapes, and the like may be determined.

10 is a diagram illustrating a screen view, according to an exemplary embodiment.

According to an embodiment, each of the plurality of setting regions may have the form of a plurality of view ports 1012a, 1012b, 1012c, and 1012d, as shown in FIG. 10. Each view port 1012a, 1012b, 1012c, and 1012d may display the same CT image as display images 1010a, 1010b, 1010c, and 1010d having different window widths and window levels. For example, as shown in FIG. 10, a CT image of the front of a human head is displayed in each of the view ports 1012a, 1012b, 1012c, and 1012d, and the first view port 1012a is high. A display image 1010a having a window level (WL = 300) and a wide window width (WW = 2000) is displayed, and the second view port 1012b has a low window level (WL = 30) and a narrow window width (WW = The display image 1010b having 300 may be displayed. According to the present exemplary embodiment, by displaying CT images at different window levels in the plurality of view ports 1012a, 1012b, 1012c, and 1012d, CT ranges of different ranges can be viewed on one screen, thereby increasing user convenience. You can. In addition, according to the present embodiment, by displaying the CT image in a plurality of view ports (1012a, 1012b, 1012c, and 1012d) with different window widths, only the desired CT number range is highlighted or displayed in a wide CT number range. By making the display identifiable, the user's convenience can be increased.

According to one embodiment, information about window width WW and window level WL corresponding to each view port 1012a, 1012b, 1012c, and 1012d is displayed in each view port 1012a, 1012b, 1012c, and 1012d. Can be displayed in a predetermined area 1022 of.

According to an embodiment, at least one of the number and arrangement of the view ports 1012a, 1012b, 1012c, and 1012d may be set and changed based on an external input signal through an input unit or a communication unit.

FIG. 11 is a diagram for describing an operation of adjusting a window width and a window level of the view ports 1012a, 1012b, 1012c, and 1012d, according to an exemplary embodiment.

According to an embodiment, window levels and window widths of the plurality of setting regions may be defined differently according to slice sections of the CT image data. For example, the window level and the window width of each of the plurality of setting regions for the first slice section 1130a are different from the window level and the window width of each of the plurality of setting regions for the second slice section 1130b. can do.

According to an embodiment, when the slice interval to be displayed is changed, variables other than the window width and the window level are equally applied to two or more view ports, and the window width and the window level may be changed. For example, the CT image processing apparatus according to an embodiment may apply the rendering method, the zooming factor, and the like to two or more view ports when the slice section is changed. Rendering schemes include, for example, minimum value rendering, maximum value rendering, average value rendering, and the like.

According to an embodiment, the CT image processing apparatus may change the two or more view ports together by interlocking variables except for the window width and the window level. For example, at least one of a zoom factor, a rendering method, a display area, a slice section, and a slice thickness may be simultaneously changed for two or more view ports.

12 is a diagram illustrating a screen view 1210 displaying a CT image in a plurality of setting areas, according to an exemplary embodiment.

According to an embodiment, as illustrated in FIG. 12, the CT images may be displayed on the plurality of view ports 1220a, 1220b, and 1220c at different window widths and window levels. For example, the first view port 1220a has a window width and window level corresponding to the bone, the second view port 1220b has a window width and window level corresponding to the heart, and the third view port 1220c. ) May have a window width and window level corresponding to closure.

According to an embodiment, information 1230a, 1230b, and 1230c about the portion of the object corresponding to the window width and the window level may be displayed in each of the view ports 1220a, 1220b, and 1220c. Information 1230a, 1230b, and 1230c about the part of the object may be displayed in various forms such as text and a figure.

13 is a diagram illustrating a screen view according to an exemplary embodiment.

According to an embodiment, on the screen view 1305 in which one CT image is displayed, a plurality of setting regions 1310a and 1310b respectively corresponding to a partial region of the CT image may be set. Each of the plurality of setting regions 1310a and 1310b may have a different window level. In addition, each of the plurality of setting regions 1310a and 1310b may have a predetermined window width. For example, as illustrated in FIG. 13, the first setting area 1310a may be an area corresponding to the brain, and the second setting area 1310b may be an area corresponding to the face part. In addition, the first setting region 1310a may have a window level 30 and a window width 300 corresponding to the brain, and the second setting region 1320b may have a window level 218 and a window width 271 corresponding to the bone.

According to an embodiment, the screen view may include information about the window width and the window level for the first setting area 1310a, 1320a, and information about the window width and the window level for the second setting area 1310b, 1320b. ) May be included.

14 is a block diagram illustrating a CT image processing apparatus 100b according to an exemplary embodiment.

The CT image processing apparatus 100b according to an embodiment includes an input unit 1410, a processing unit 410, a display unit 420, and a communication unit 1420. According to an exemplary embodiment, the CT image processing apparatus 100b may include both the input unit 1410 and the communication unit 1420 or only one of the two. 14, a description overlapping with the description of FIG. 4 will be omitted.

The input unit 1410 or the communication unit 1420 may receive a control signal. The control signal may include, for example, a control signal for setting a plurality of setting regions, a control signal for setting a window width, a control signal for setting a window level, and the like.

The input unit 1410 receives a control signal. The input unit 1410 may include, for example, a key, a touch screen, a touch pad, a trackball, a mouse, and the like. The input unit 1410 may correspond to the input unit 128 described above with reference to FIG. 2. The input unit 1410 receives a control signal generated by a user's manipulation.

The communication unit 1420 communicates with an external device by wire or wirelessly. The communication unit 1420 may receive a control signal, data, or the like from an external device, or may transmit a control signal, data, etc. to an external device. The communication unit 1420 may correspond to the communication unit 132 described above with reference to FIGS. 2 and 3.

The processor 410 may generate or change a plurality of setting areas according to a control signal input through the input unit 1410 or the communication unit 1420. In addition, the processor 410 may set or change at least one of a window width and a window level for the plurality of setting areas according to the input control signal.

The storage unit 124 stores information about the setting area set by the user, window width and window level of each setting area. According to an embodiment, the storage unit 124 may store information about a setting area set by a user in a predetermined area in the CT image file. For example, a space for storing setting area information, window width, and window level may be defined in the data structure of the CT image file.

15 is a diagram illustrating an example of generating a setting area according to an exemplary embodiment.

According to an embodiment, the setting area may be generated according to a control signal received through the input unit 1410 or the communication unit 1420. For example, as shown in FIG. 15, the user drags the cursor 1502 from the first point 1504 to the second point 1506 to set the first setting area 1510a. Can be. In the state where the second setting area 1510b is set, by adding the first setting area 1510a, two setting areas having window widths and window levels independent of each other are set.

According to an embodiment, after an operation of generating a setting area, a graphical user interface (GUI) for setting a window width and a window level for the generated setting area may be provided.

16 is a diagram illustrating an example of generating a setting area according to an exemplary embodiment.

According to an embodiment, the setting area may be copied and added according to a control signal received through the input unit 1410 or the communication unit 1420. For example, while the first setting area 1610a is set, the user clicks on a point 1602 of the first setting area 1610a and drags and drops 1606 to the second point 1604. As a result, the third setting area 1610c generated by copying the first setting area 1610 may be generated. By this input, the third setting area 1610c is generated in addition to the existing first setting area 1610a and the second setting area 1610b. In the third setting area 1610c generated by dragging and dropping the first setting area 1610a 1606, the CT image displayed on the first setting area 1610a may be displayed as it is shown in FIG. 16. have. According to an embodiment, after the third setting area 1610c is generated, a GUI for setting the window width and the window level of the third setting area 1610c may be provided. The window width and the window level of the third setting area 1610c may be set independently of the first setting area 1610a.

17 is a diagram for describing a process of adjusting a plurality of setting areas, window widths, and window levels, according to an exemplary embodiment.

According to an embodiment, at least one of positions and sizes of the plurality of setting regions may be changed according to the slice section. According to the slice section, the position and the size may be changed only for some of the plurality of setting regions, or the position and the size may be changed for all of the plurality of setting regions. In addition, according to the slice section, only one of the window width and the window level of the predetermined setting region may be changed, or both the window width and the window level may be changed.

According to an embodiment, as shown in FIG. 17, the first setting region 1710a and the second setting region (for the first CT image 1704a corresponding to the first slice section of the CT image data 1702). 1710b may be set, and a third setting area 1710c and a fourth setting area 1710d may be set for the second CT image 1704b corresponding to the second slice section. Each setting area may have different window widths and window levels (WW / WL1, WW / WL2, WW / WL3, and WW / WL4). According to another embodiment, only the position and size of the setting region may be changed according to the slice section, and the window width and the window level may not be changed. According to another embodiment, the position and size of the setting area may not be changed according to the slice section, and only the window width and the window level may be changed.

The slice section may be changed in various axial directions. For example, the slice section may be changed in the x-axis, y-axis, or z-axis direction.

The plurality of setting areas, window widths, and window levels according to the slice intervals may be preset by the user or automatically set by the processor 410.

According to an embodiment, information about a setting area, a window width, and a window level set for each slice section may be stored together with a data set including CT images of a plurality of slices.

18 is a diagram for describing a process of adjusting a plurality of setting areas, window widths, and window levels.

According to an embodiment, when the slice section is changed, the position or size of the plurality of setting regions may be changed, or the window width or window level may be changed according to segmentation expressed in the CT image. Segmentation is a portion of a subject, for example, a portion of a subject such as liver, stomach, heart, bone, or the like. Referring to FIG. 18, an embodiment in which the first CT image 1810a, the second CT image 1810b, and the third CT image 1810c are displayed as the slice section is changed will be described. As the slice section is changed, the position, shape, and size of the first segmentation 1820 and the second segmentation 1830 may be changed as shown in FIG. 18. As the slice section is changed as described above, when the position and size of the segmentation 1820 and 1830 are changed, the position and size of the setting area may be changed according to the changed position and size. For example, the first setting area 1840a corresponding to the first segmentation 1820 is changed according to the slice section as shown in FIG. 18, and the second setting area 1840b corresponding to the second segmentation 1830. ) May be changed according to the slice section as shown in FIG. 18.

According to an embodiment, the CT image processing apparatus may recognize a segmentation corresponding to each setting region from the CT image, and change the position and size of each setting region according to the change in the position and size of the segmentation.

According to another exemplary embodiment, the CT image processing apparatus determines a segmentation to set a corresponding setting area according to a control signal input through the input unit 1410 or the communication unit 1420, and sets the setting area according to the position and size of the segmentation. After creation, the location and size of the setting region may be adjusted to correspond to the location and size of the segmentation according to the slice section.

According to an embodiment, the CT image processing apparatus may adjust the window width and the window level of the setting area according to a change in the CT number range of the segmentation according to the change of the slice section.

19 is a diagram illustrating a GUI screen view, according to an exemplary embodiment.

The GUI screen view according to an embodiment has an image display portion 1910 and an operation portion 1920.

In the image display portion 1910, CT images are displayed in a plurality of view ports. Each view port may have a different window width and window level. According to another exemplary embodiment, the CT image and the plurality of setting regions may be displayed in the form as described above with reference to FIG. 13 before the image display portion 1910.

According to an embodiment, the CT image displayed on the image display unit 1910 may display a preview image reflecting a setting value changed according to a control signal input through the manipulation unit 1920.

The operation portion 1920 includes a layout selection portion 1930, a scale grid selection portion 1940, a segmentation selection portion 1960, a filter selection portion 1970, a window width and window level setting portion 1980, and a zoom factor setting. Portion 1990. The manipulation portion 1920 may be implemented in various combinations of the portions. That is, various combinations of GUI screen views including all or some of the GUI portions illustrated in FIG. 19 may be generated.

The layout selection portion 1930 may receive a control signal for selecting the number and arrangement of view ports. The scale grid selection portion 1940 may receive a control signal for selecting whether to display the scale grid or a control signal for selecting an interval or shape of the scale grid.

The preset portion 1960 may receive a control signal for selecting segmentation. Preset portion 1960 may have a selection key corresponding to each segmentation, including, for example, a description of the segmentation graphically or textually. The CT image processing apparatus may set the window width and the window level to a value corresponding to the segmentation selected by the preset part 1960.

The filter selection unit 1970 may receive a control signal for selecting a type of filter to be applied to at least one view port of the image display unit 1910. When the type of filter is selected, the CT image processing apparatus performs the selected filter processing on the CT image to be displayed on the corresponding view port and displays it on the corresponding view port.

The window width and window level setting part 1980 may receive a control signal for setting the window width and the window level of the selected setting area.

The zoom factor setting part 1990 may receive a control signal for setting the zoom factor. According to the control signal for setting the zoom factor, the CT image processing apparatus may change the zoom factor of the CT image displayed on the image display portion 1910. For example, the CT image displayed on the image display portion 1910 may be enlarged or reduced in size according to the zoom factor.

When the key 1952 is selected, the CT image processing apparatus receives a control signal for selecting whether to display a reference line. The CT image processing apparatus may or may not display the reference line on the CT image display unit 1910 according to a control signal for selecting whether to display the reference line.

The key 1950 may receive a control signal that selects whether to display header annotations. The CT image data may include annotation information in the header portion. The CT image processing apparatus may or may not display annotation information included in the header portion along with the CT image according to a control signal for selecting whether to display the header annotation.

When the key 1982 is selected, the CT image processing apparatus receives a control signal for setting the setting values of the operation portion 1920 to default values. The default value may be stored in advance.

When the key 1984 is selected, information about the setting area, window width, and window level set for each CT image is stored. The information on the set region, the window width, and the window level may be stored in a corresponding CT image file or may be stored in a separate file. In addition, when 1984 is selected, the currently set screen layout may be stored together with the CT image. For example, when the user designates a predetermined layout for the data set of the CT image, the screen layout may be stored together with the CT image data set.

20 is a diagram illustrating a GUI screen, according to an exemplary embodiment.

According to an embodiment, the preset portion 1960 and the window width and window level setting portion 1980 are displayed on the GUI screen, and the processor 410 (see FIG. 4) sets the preset portion 1960 and the window width and window level. The window width and window level may be set via user input received through portion 1980. The arrangement, configuration, and type of segmentation icons 2012a, 2012b, 2012c, and 2012d displayed on the GUI screen may vary according to specific embodiments.

The preset portion 1960 is a GUI region in which a window width and a window level can be set by selecting a body part or a tissue. The preset portion 1960 includes at least one icon 2012a, 2012b, 2012c, 2012d representing a body part or tissue. When one of the icons 2012a, 2012b, 2012c, and 2012d shown in the preset portion 1960 is selected, the CT number range corresponding to the CT number corresponding to the body part or tissue of the selected icon 2012a is displayed in the window width and the window level. It may be set to a value (S2002). For example, when the icons 2012a, 2012b, 2012c, and 2012d representing brains, lungs, abdomen, kidneys, bones, etc. are displayed in the preset part 1960, and the user selects the icons 2012a corresponding to the brains, The CT number range (eg, -120 to 180) corresponding to the brain is set to the window width and window level. The setting value set by the input through the preset portion 1960 may be displayed in the window width and window level setting portion 1980. The selected icon 2012a may be displayed differently from the other icons 2012b, 2012c, and 2012d by the box 2014 or the like.

The window width and window level values set by the selection through the preset portion 1960 may be adjusted by input through the window width and window level setting portion 1980 (S2004). For example, when the brain icon 2012a is selected in the preset portion 1960 and the window width 300 and the window level 30 are set in the window width and window level setting portion 1980, the input unit 1410 (see FIG. 14). When the window width display portion 2022 is selected by the input signal through the window width and the setting value of the window width is input, the window width is changed according to the input setting value. Similarly, when the window level display portion 2024 is selected by the input signal through the input unit 1410 and the setting value of the window level is input, the window level is changed according to the input setting value.

According to the present exemplary embodiment, the user may set an approximate window width and window level through the preset portion 1960 and directly set the window width and window level through the window width and window level setting portion 1980. Therefore, the user can easily set the window width and window level for the segmentation he is interested in, and fine adjustment of the preset is possible, thereby increasing user convenience.

The disclosed embodiments may be implemented as S / W programs that include instructions stored in computer-readable storage media.

The computer is a device capable of calling stored instructions from a storage medium and operating according to the disclosed embodiments according to the called instructions, and may include a CT system according to the disclosed embodiments.

The computer readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' means that the storage medium does not include a signal and is tangible, but does not distinguish that the data is stored semi-permanently or temporarily on the storage medium.

In addition, the CT system or method according to the disclosed embodiments may be provided included in a computer program product. The computer program product may be traded between the seller and the buyer as a product.

The computer program product may include a S / W program and a computer readable storage medium storing the S / W program. For example, a computer program product may include a product (eg, a downloadable app) in the form of a S / W program distributed electronically through the manufacturer of an CT system or an electronic market (eg, Google Play Store, App Store). have. For electronic distribution, at least a part of the S / W program may be stored in a storage medium or temporarily generated. In this case, the storage medium may be a server of a manufacturer, a server of an electronic market, or a storage medium of a relay server that temporarily stores a SW program.

The computer program product may include a storage medium of a server or a storage medium of a terminal in a system consisting of a server and a terminal (eg, a CT system). Alternatively, when there is a third device (eg, a smartphone) that is in communication with the server or the terminal, the computer program product may include a storage medium of the third device. Alternatively, the computer program product may include the S / W program itself transmitted from the server to the terminal or the third device, or transmitted from the third device to the terminal.

In this case, one of the server, the terminal and the third device may execute the computer program product to perform the method according to the disclosed embodiments. Alternatively, two or more of the server, the terminal and the third device may execute a computer program product to distribute and implement the method according to the disclosed embodiments.

For example, a server (eg, a cloud server or an artificial intelligence server, etc.) may execute a computer program product stored in the server to control a terminal connected to the server to perform the method according to the disclosed embodiments.

As another example, a third device may execute a computer program product to control a terminal in communication with the third device to perform the method according to the disclosed embodiment. As a specific example, the third apparatus may remotely control the CT system so that the CT system irradiates the X-ray to the object and generates an image of a part inside the object based on the radiation information detected by the X-ray detector through the object. can do.

As another example, a third device may execute a computer program product to directly perform a method according to the disclosed embodiment based on values input from an auxiliary device (eg, a gantry of a CT system). As a specific example, the auxiliary device may irradiate the X-ray to the object and acquire the detected radiation information through the object. The third device may receive the radiation information detected from the auxiliary device and generate an image of a portion inside the object based on the input radiation information.

When the third device executes the computer program product, the third device may download the computer program product from the server and execute the downloaded computer program product. Alternatively, the third apparatus may execute the provided computer program product in a preloaded state to perform the method according to the disclosed embodiments.

As described above, the disclosed embodiments have been described with reference to the accompanying drawings. Those skilled in the art will understand that the present invention can be implemented in a form different from the disclosed embodiments without changing the technical spirit or essential features of the present invention. The disclosed embodiments are exemplary and should not be construed as limiting.

100: CT system
100a, 100b: CT image processing device
410: processing unit
420: display unit

Claims (20)

A display unit configured to display a screen view representing a plurality of CT images corresponding to each of the plurality of setting regions; And
A plurality of window widths and window levels are set for each of the plurality of setting areas of the display unit, and the plurality of converted areas according to window widths and window levels respectively corresponding to the plurality of setting areas. It includes a processing unit for generating a CT image,
The plurality of setting regions have different window levels,
And the plurality of CT images corresponds to the same slice of the same data set, and the screen view representing the plurality of CT images comprises a plurality of CT images corresponding to the same slice and having different window levels. The method of claim 1,
Each of the plurality of setting areas corresponds to a view port of the display unit. The method of claim 2,
The CT image processing apparatus further includes an input unit configured to receive a control signal for controlling a screen view.
The processor is further configured to change at least one of a rendering method, a zooming setting value, and a slice interval for the plurality of setting areas based on the control signal. The method of claim 1,
And the plurality of setting areas correspond to different areas on the display unit defined in one CT image. The method of claim 4, wherein
The CT image processing apparatus further includes an input unit configured to receive a control signal for setting the plurality of setting regions.
The processor is configured to perform at least one of adding a setting area, deleting a setting area, changing a area of a setting area, changing a window width of a setting area, and changing a window level of a setting area, based on the control signal. CT image processing device. The method of claim 5,
And a storage unit which stores information about a setting area, a window width, and a window level set according to the control signal. The method of claim 4, wherein
The CT image processing apparatus further includes an input unit configured to receive a control signal for setting the plurality of setting regions.
And the processing unit generates, on the screen view, another setting area displaying the same CT image data displayed on the setting area selected by the control signal among the plurality of setting areas. The method of claim 4, wherein
The window width and the window level of the plurality of setting areas are differently defined according to slice sections of the CT image. The method of claim 4, wherein
The position and size of the plurality of setting regions are differently defined according to slice sections of the CT image data. The method of claim 4, wherein
The at least one of the position, the size, the window width, and the window level of the plurality of setting regions is differently defined according to segmentation of the object represented in the CT image data. The processor sets a window width and a window level for each of the plurality of setting regions;
Generating, by the processor, a plurality of CT images converted according to window widths and window levels corresponding to each of the plurality of setting regions; And
A display unit displaying an screen view representing the plurality of CT images corresponding to each of the plurality of setting regions,
The plurality of setting regions have different window levels,
And the plurality of CT images corresponds to the same slice of the same data set, and the screen view representing the plurality of CT images comprises a plurality of CT images corresponding to the same slice and having different window levels. The method of claim 11,
Each of the plurality of setting areas corresponds to a view port of the display unit. The method of claim 12,
An input unit receiving a control signal for controlling a screen view; And
And the processor is further configured to change at least one of a rendering method, a zooming setting value, and a slice section of the plurality of setting areas based on the control signal. The method of claim 11,
The plurality of setting areas correspond to different areas on the display unit defined in one CT image. The method of claim 14,
An input unit receiving a control signal for setting the plurality of setting regions; And
The processor performs an operation of performing at least one of adding a setting area, deleting a setting area, changing an area of a setting area, changing a window width of a setting area, and changing a window level of a setting area, based on the control signal. CT image processing method further comprising. The method of claim 15,
And storing information about a setting area, a window width, and a window level set according to the control signal. The method of claim 14,
An input unit receiving a control signal for setting the plurality of setting regions; And
And the processing unit generates another setting area on the screen view that displays the same CT image data displayed on the setting area selected by the control signal among the plurality of setting areas. The method of claim 14,
The window width and the window level of the plurality of setting areas are differently defined according to the slice section of the CT image, CT image processing method. The method of claim 14,
The position and size of the plurality of setting regions are differently defined according to slice sections of the CT image data. In a computer program stored in a computer-readable storage medium for executing a CT image processing method, the CT image processing method includes:
The processor sets a window width and a window level for each of the plurality of setting regions;
Generating, by the processor, a plurality of CT images converted according to window widths and window levels corresponding to each of the plurality of setting regions; And
A display unit displaying an screen view representing the plurality of CT images corresponding to each of the plurality of setting regions,
The plurality of setting regions have different window levels,
Wherein the plurality of CT images correspond to the same slice of the same data set, and the screen view representing the plurality of CT images comprises a plurality of CT images corresponding to the same slice and having different window levels.

Images