KR20170116945A - Apparatus and method for processing CT image - Google Patents

Abstract

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

Description

[0001] Apparatus and method for processing CT images [0002]

The disclosed embodiments relate to a computer program product comprising a computer-readable storage medium including a computer-readable medium having computer-executable instructions for performing the method.

CT images can be represented by CT numbers. The CT number is also referred to as the Hounsfield unit (HU) and is a measure of radiopacity. The CT number may be represented by an integer in the range of, for example, -1024 to 3071, and may be expressed 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 must be expressed in a wide gradation range. The number of gradations that can be displayed on the display portion is 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 allow 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 changing the slice interval when displaying a CT image.

According to an aspect of the disclosed embodiments,

A display unit that displays a plurality of CT images corresponding to the plurality of setting areas; And

Wherein the control unit sets a window width and a window level for each of the plurality of setting areas of the display unit and sets the window width and the window level corresponding to the plurality of setting areas, And a processing unit for generating a CT image,

Wherein the plurality of setting areas have different window levels,

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 viewport of the display unit.

Wherein the CT image processing apparatus further comprises an input section that receives a control signal for controlling a screen view, and the processing section sets, based on the control signal, a rendering method, a zooming setting Value, and slice interval can be changed together.

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

Wherein the CT image processing apparatus further comprises an input section for receiving a control signal for setting the plurality of setting areas, wherein the processing section is configured to add the setting area, delete the setting area, It is possible to perform at least one of the area change, the window width change of the setting area, and the window level change of the setting area.

The CT image processing apparatus may further include a storage unit for storing information about a setting region, a window width, and a window level set according to the control signal.

Wherein the CT image processing apparatus further comprises an input unit for receiving a control signal for setting the plurality of setting areas, wherein the processing unit is configured to perform, in the plurality of setting areas, the same CT image displayed in the setting area selected by the control signal Another setting area for displaying data can be created on the screen view.

The window width and the window level of the plurality of setting areas may be defined differently according to the slice interval of the CT image.

The position and size of the plurality of setting areas may be defined differently according to the slice interval of the CT image data.

At least one of the position, size, window width, and window level of the plurality of setting areas may be defined differently according to the 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 a plurality of setting areas;

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

And displaying a screen view showing the plurality of CT images corresponding to each of the plurality of setting areas,

Wherein the plurality of setting areas have different window levels,

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

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

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

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

And displaying a screen view representing the plurality of CT images corresponding to each of the plurality of setting areas,

Wherein the plurality of setting areas have different window levels,

Wherein 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, it is possible to simultaneously identify parts of two or more objects having different CT number ranges.

Also, the disclosed embodiments have the effect of easily adjusting the window width and the window level while changing the slice interval when displaying CT images.

1 is a schematic view of a CT system 100. FIG.
2 is a diagram showing the structure of a CT system 100 according to the disclosed embodiment.
Fig. 3 is a diagram showing the configuration of the communication unit 132. Fig.
FIG. 4 is a diagram illustrating a structure of a CT image processing apparatus 100a according to an embodiment.
FIG. 5 is a view showing a CT number of the body tissue, organ, material, etc. according to an embodiment.
6 is a view for explaining a CT number and a display gradation according to an embodiment.
7 is a diagram illustrating an example display 710, a transfer curve 730, and a histogram 740, according to one embodiment.
FIG. 8 is a diagram illustrating 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 embodiment.
10 is a view illustrating a screen view according to an embodiment.
11 is a view for explaining the operation of adjusting the window width and window level of the view ports 1012a, 1012b, 1012c, and 1012d according to an embodiment.
12 is a view illustrating a screen view 1210 displaying CT images in a plurality of setting areas according to an embodiment.
13 is a view illustrating a screen view according to an embodiment.
14 is a block diagram showing a CT image processing apparatus 100b according to an embodiment.
FIG. 15 is a diagram illustrating a configuration area being created according to an embodiment.
FIG. 16 is a view showing a configuration area being created according to an embodiment.
FIG. 17 is a diagram for explaining a process of adjusting a plurality of setting areas, a window width, and a window level according to an embodiment.
18 is a diagram for explaining a process of adjusting a plurality of setting areas, a window width, and a window level.
19 is a diagram illustrating a GUI screen view according to an embodiment.

Brief Description of the Drawings The advantages and features of the present invention, and how to accomplish them, will become apparent with reference to the embodiments described hereinafter with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

The terms used in this specification will be briefly described and the present invention will be described in detail.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements, without departing from the spirit or scope of the present invention. Also, as used herein, the term "part " refers to a hardware component such as software, FPGA or ASIC, and" part " However, 'minus' is not limited to software or hardware. The " part " may be configured to be in an addressable storage medium and configured to play back one or more processors. Thus, by way of example, and not limitation, "part (s) " refers to components such as software components, object oriented software components, class components and task components, and processes, Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays and variables. The functions provided in the components and "parts " may be combined into a smaller number of components and" parts " or further separated into additional components and "parts ".

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly explain the present invention in the drawings, parts not related to the description will be omitted.

As used herein, the term "image" may refer to multi-dimensional data composed of discrete image elements (e.g., pixels in a two-dimensional image and voxels in a three-dimensional image). For example, the image may include a medical image or the like of the object obtained by the CT photographing apparatus.

As used herein, the term "CT (Computed Tomography) image" may mean a composite image of a plurality of x-ray images obtained by photographing an object while rotating around 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 comprise at least one of the following: liver, heart, uterus, brain, breast, organs such as the abdomen, and blood vessels. The "object" may also be a phantom. A phantom is a material that has a volume that is very close to the density of the organism and the effective atomic number, and can include a spheric phantom that has body-like properties.

As used herein, the term "user" may be a doctor, a nurse, a clinical pathologist, a medical imaging specialist, or the like, and may be a technician repairing a medical device.

The CT system can provide a cross-sectional image for a target object, which is advantageous in that the internal structure of the target object (for example, an organ such as a kidney, a lung, etc.) can be expressed without overlapping with a general X-ray imaging apparatus.

The CT system can obtain a relatively accurate sectional image with respect to a target object, for example, by acquiring image data of 2 mm or less in thickness and obtaining it several hundred times per second. Conventionally, there has been a problem that only the horizontal section of the object is expressed, but it has been overcome by the appearance of the following various image reconstruction techniques. Three-dimensional reconstruction imaging techniques include the following techniques.

- SSD (Shade surface display): A technique to represent only voxels having a certain HU value by the initial 3D image technique.

- MIP (maximum intensity projection) / MinIP (minimum intensity projection): A 3D technique that represents only those with the highest or lowest HU value among the voxels that make up the image.

- VR (volume rendering): A technique that can control the color and transparency of voxels constituting an image according to a region of interest.

- Virtual endoscopy: A technique capable of endoscopic observation on reconstructed 3-D images using VR or SSD techniques.

- MPR (multi planar reformation): An image technique that reconstructs into other sectional images. It is possible to reconstruct the free direction in the direction desired by the user.

- Editing: Several techniques for organizing surrounding voxels to more easily observe the region of interest in the VR.

- VOI (voxel of interest): A technique that expresses only the selected region by VR.

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

1 is a schematic view of a CT system 100. FIG. 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 generating unit 106 and an X-ray detecting unit 108.

The object 10 can be placed on the table 105. [

The table 105 can be moved in a predetermined direction (e.g., at least one of up, down, left, and right) in the CT photographing process. In addition, the table 105 may be tilted or rotated by a predetermined angle in a predetermined direction.

Also, the gantry 102 may be inclined by a predetermined angle in a predetermined direction.

2 is a diagram showing the 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 control unit 118, a storage unit 124, an image processing unit 126, an input unit 128, a display unit 130, (132).

As described above, the object 10 may be located on the table 105. [ The table 105 according to the disclosed embodiment is movable in a predetermined direction (e.g., at least one of up, down, left, and right) and the movement can be controlled by the control unit 118. [

The gantry 102 according to the disclosed embodiment includes a rotating frame 104, an X-ray generating unit 106, an X-ray detecting unit 108, a rotation driving unit 110, a data acquiring circuit 116, a data transmitting unit 120 ).

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

The rotating frame 104 may include an X-ray generating unit 106 and an X-ray detecting unit 108 arranged to face each other with a predetermined field of view (FOV). In addition, the rotating frame 104 may include an anti-scatter grid 114. Scattering prevention grid 114 may be positioned between the X-ray generation unit 106 and the X-ray detection unit 108.

In medical imaging systems, X-ray radiation reaching the detector (or photosensitive film) includes attenuated primary radiation, which forms useful images, as well as scattered radiation, which degrades the quality of the image . An anti-scatter grid may be placed between the patient and the detector (or photosensitive film) to transmit the majority of the radiation and attenuate the scattered radiation.

For example, the anti-scatter grid may include strips of lead foil, solid polymer material, solid polymer and fiber composite material, etc. And the interspace material of the interlayer material may be alternately stacked. However, the form of the scattering prevention grid is not necessarily limited thereto.

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

 The X-ray generator 106 receives voltage and current from a power distribution unit (PDU) (not shown) through a slip ring (not shown) through a high voltage generator (not shown) . When the high voltage generating section applies a predetermined voltage (hereinafter referred to as a tube voltage), the X-ray generating section 106 can generate X-rays having a plurality of energy spectra corresponding to this predetermined tube voltage .

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

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

The X-ray detector 108 senses X-rays generated from the X-ray generator 106 and transmitted through the object 10, and can generate an electric signal corresponding to the intensity of the sensed X-rays.

The X-ray detector 108 may include an indirect method for detecting and converting radiation into light, and a direct method detector for detecting and converting the radiation directly into electric charge. An indirect X-ray detector can use a Scintillator. In addition, a direct-type X-ray detector can use a photon counting detector. A Data Acquisition System (DAS) 116 may be coupled to the X-ray detector 108. The electrical signal generated by the X-ray detector 108 may be collected at the DAS 116. The electrical signal generated by the X-ray detector 108 may be collected at the DAS 116 either wired or wirelessly. The electrical signal generated by the X-ray detector 108 may be provided to an analog / digital converter (not shown) via an amplifier (not shown).

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

The digital signal may be provided to the image processing unit 126 through the data transmission unit 120. The digital signal may be transmitted to the image processing unit 126 via the data transmission unit 120 in a wired or wireless manner.

The controller 118 according to the disclosed embodiment can control the operation of each module of the CT system 100. [ For example, the control unit 118 includes a table 105, a rotation driving unit 110, a collimator 112, a DAS 116, a storage unit 124, an image processing unit 126, an input unit 128, 130, the communication unit 132, and the like.

The image processing unit 126 may receive the data (e.g., raw data) obtained from the DAS 116 through the data transmission unit 120 and perform a pre-processing process .

The preprocessing may include, for example, a process of non-uniformity of sensitivity correction between channels, a sharp decrease in signal intensity or a process of correcting loss of signal due to an X-ray absorber such as a metal.

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

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

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

Also, the image processing unit 126 can reconstruct the cross-sectional image of the object using the acquired projection data set. Such a cross-sectional image may be a three-dimensional image. In other words, the image processing unit 126 may generate a three-dimensional image of the object using a cone beam reconstruction method based on the acquired projection data set.

External inputs for X-ray tomography conditions, image processing conditions and the like can be received through the input unit 128. For example, the X-ray tomography conditions include a plurality of tube voltages, energy value setting of a plurality of X rays, selection of a photography protocol, selection of an image reconstruction method, FOV area setting, number of slices, slice thickness, Processing parameter setting, and the like. The image processing condition may include resolution of the image, setting of the attenuation coefficient for the image, and setting of the combination ratio of the image.

The input unit 128 may include a device or the like 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 pan, a voice, and a gesture recognition device.

The display unit 130 may display an X-ray image reconstructed by the image processing unit 126. FIG.

Transmission and reception of data, power, etc. between the above-described elements can be performed using at least one of wired, wireless, and optical communication.

The communication unit 132 can perform communication with an external device, an external medical device, or the like through the server 134 or the like. This will be described later with reference to Fig.

Fig. 3 is a diagram showing the configuration of the communication unit 132. Fig.

The communication unit 132 may be connected to the network 301 by wire or wireless and may communicate with the external server 134, the medical device 136, or the portable device 138. The communication unit 132 can exchange data with other medical devices in the hospital server or the hospital connected through the PACS (Picture Archiving and Communication System).

In addition, the communication unit 132 may perform data communication with the portable device 138 and the like in accordance with a DICOM (Digital Imaging and Communications in Medicine) standard.

The communication unit 132 can transmit and receive data related to diagnosis of the object through the network 301. [ Also, the communication unit 132 can transmit and receive medical images and the like acquired by the medical device 136 such as an MRI apparatus and an X-ray apparatus.

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

In addition, information on the abnormality of the equipment and the quality management status information can be transmitted to the system administrator or the service person through the network, and the feedback can be received.

FIG. 4 is a diagram illustrating a structure of a CT image processing apparatus 100a according to an 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 includes a processing unit 410 for processing a CT image and a display unit 420, and can be implemented in various forms. The CT image processing apparatus 100a may be implemented in the form of a CT system, a general-purpose computer, a tablet PC, a smart phone, a medical terminal, a medical image information system, or the like. When the CT image processing apparatus 100a is implemented in the form of the CT system 100 shown in FIGS. 1 and 2, the processing unit 410 corresponds to the image processing unit 126 of FIG. 2, May correspond to the display unit 130 of FIG. It is also possible that the processing section 410 further performs the role of the control section 118 in Fig.

The processing unit 410 sets a window width and a window level for each of a plurality of setting areas arranged on the screen view.

The plurality of setting areas are different areas arranged on the screen view. The plurality of setting areas can be determined independently of their positions and sizes, and can be set so as not to overlap each other. According to one embodiment, the plurality of setting areas may have overlapping areas in some areas.

The configuration of the plurality of setting areas may take the form of, for example, a rectangle, a region defined by a closed curve, and the like.

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

In addition, the processing unit 410 can generate display image data from the input CT image data. The CT image data may be expressed in the CT number and the processing unit 410 may convert the CT image data into display image data by mapping each of the CT numbers to the brightness value of the display image data. The relationship between the CT number and the brightness value of the display image data can be defined by a transfer graph, a lookup table, and the like. In the present specification, the relationship between the CT number and the brightness value of the image data for display is described 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 areas. The transformation graph may be defined according to a window width and a window level defined for each of the plurality of setting areas.

In addition, the processing unit 410 generates a screen view representing the 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 showing a CT image in a plurality of setting areas.

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

According to one embodiment, the processing unit 410 may receive information on the display gradation value range and the number of gradations of the display unit 420 from the display unit 420 or may store the information in advance on a predetermined storage medium.

FIG. 5 is a view showing a CT number of the body tissue, organ, material, etc. according to an embodiment.

The CT number of the CT image data may be referred to as a CT number. Each tissue, organ, and material in the body has its own CT number according to its composition and structure. As described above, since each body tissue, device, and material have unique CT numbers, each part is displayed separately in the CT image, and the user can diagnose the state of the object through the CT image. The CT number can be expressed by Equation (1).

Each tissue, organ, and material of the body may have a CT number as shown in FIG. First, the air can have a CT number around -1000, and water can have a CT number around 0. Lungs with high air content, fat, Mamma, etc. can have low CT numbers between -1000 and 0. Bone, Blood, Heart, Liver, Tumor, etc. with low air content and high density can have CT numbers between 0 and 3000. As described above, since each body tissue, organ, and substance have CT numbers of different ranges, when the CT image is used for diagnosis, the CT number corresponding to the range of the CT number corresponding to the body tissue, organ, It is preferable to display the CT image data by setting the window width and the window level.

6 is a view for explaining a CT number and a display gradation according to an embodiment.

The CT image data is represented by a CT number. For example, 12-bit CT image data can be represented by 4096 CT numbers, and the CT number of each pixel can be determined to an integer value ranging from -1024 to 3071. However, the display gradation of the display unit 420 may have a smaller number of tone values than the number of CT numbers of 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, the CT number and the display gradation value do not match one to one , Some of the CT image data may not be representable.

Due to the difference between the CT number and the number of display gradations, it is possible to define the window level and the window width for the CT number when displaying the CT image data. The window level WL is a representative value for the CT numbers belonging to the CT number range which gives a change to the display gradation, and can be expressed by a middle CT number of the CT number range belonging to the corresponding CT number range, for example. The CT number can be set in accordance with the difference in the magnitude of the advance magnitude. Lower levels of the window show low air absorption and fat absorption, and high radiation absorption materials such as bones can be seen.

For convenience of explanation, the CT number range giving change in the display gradation is referred to as a CT number range of interest. The window width WW indicates the number of CT numbers belonging to the CT number range that gives a change to the display gradation. For example, the CT number range of interest may be defined as window width 700, window level 1000, and so on.

7 is a diagram illustrating an example display 710, a transfer curve 730, and a histogram 740, according to one embodiment.

According to one embodiment, the correspondence relation between the CT number and the display gradation value can be expressed by a conversion graph. For example, as shown in Fig. 7 (b), in the space defined by the CT number of the horizontal axis and the display gradation of the vertical axis, a conversion graph 730 indicating the relationship between the CT number and the display gradation can be defined.

7 (b), when the window width WW and the window level WL of the CT number range of interest 750 are defined, in the CT number range belonging to the CT number range of interest 750, The slope of the conversion graph can be set larger than the CT number range that does not belong to the CT number range 750. [ The processing unit 410 may adjust the slope of the transformed graph to adjust the ratio of the number of CT numbers to the number of the displayed gradation values with respect to the predetermined CT number range. Accordingly, for the CT number range belonging to the CT number range of interest 750, different CT numbers of the CT image data are displayed separated by different display gradation values. However, for the CT number range not belonging to the CT number range of interest 750, , The different CT numbers of the CT image data are expressed by the same display gradation value or the difference of the display gradation values is expressed by the difference of the CT number. Accordingly, the image data of the CT number range falling within the CT number range of interest 750 clearly reveals the CT number difference, whereas the image data of the CT number range not belonging to the CT number range of interest 750 is expressed without the CT number difference Or the CT number difference can be expressed small. In this way, the difference in the display gradation value becomes smaller than the CT number difference is referred to as gradation compression.

7 (a) shows the CT image data displayed according to the conversion graph of FIG. 7 (b). The CT image data of FIG. 7 (a) has the same CT number distribution as the histogram 740 of FIG. 7 (b). Most of the 8-bit display gradation values are assigned to the CT number range belonging to the CT number range of interest 750. However, a limited number of display is performed for the CT number ranges R1 and R2 that do not belong to the CT number range of interest 750 Only the gradation value is assigned, and gradation compression occurs. Therefore, a part of the CT image data can be displayed in a single gradation even though there is a difference in the CT number. For example, although the CT image data in Fig. 7 (a) is confirmed to have a high frequency number in the range of CT numbers -1000 to -700 in the histogram 740 as shown in Fig. 7 (b) , The CT numbers of the corresponding range are all expressed as 0, which is the lowest display gradation value, and are displayed in black on the display image 710 (712, 314). In addition, although the image data corresponding to the range of the CT number corresponding to the R2 section exists in the histogram 740, the CT numbers of the corresponding range are all represented by 255, which is the highest display gradation, (716, 718).

FIG. 8 is a diagram illustrating 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 are 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 in each setting area, the CT numbers are continuous and the displayed tonal values can be continuous. For example, the CT number range of interest in the first setting area 820 corresponds to the CT numbers in the range of 650 to 1050 and the display tone values in the range of 126 to 254, and the CT number range of interest in the second setting area 822 is A CT number in the range of -950 to -450, and a display gradation value in the range of 2 to 124.

Each setting area has a window width (WW) and a window level (WL). For example, the first setting region 820 has the window width WWW 700 and the window level WL 1000, the second setting region 822 has the window width WW 500, the window level WL-700 Lt; / RTI >

According to one embodiment, the first setting area 820 has a window width WW and a window level WL corresponding to the CT number of the lungs, and the second setting area 822 has a CT number corresponding to the CT number of the bone A window width WW and a window level WL. The lung has a low CT number of around -700. On the other hand, the bones have a high CT number around 1000. By CT scan around the lungs, however, bone tissues such as ribs and vertebrae are expressed along with the lungs. Accordingly, when 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, You can see the data. Also, for each of the lungs and bones, the CT number difference within each organ is identifiably represented in one screen view.

According to one embodiment, the CT image data is CT image data captured using a contrast agent, the first setting region 820 has a window width and a window level corresponding to the CT number of the cancer tissue absorbing the contrast agent, 2 setting area may have a window width and window level corresponding to the CT number of the soft tissue. Cancer tissues absorb contrast agents very well. Therefore, when CT imaging is performed after administering contrast medium to a subject, cancer tissues absorbing the contrast agent have a very high CT number. Whereas the soft tissue has a low CT number of zero or less. Accordingly, the window width and the window level of the first setting area 820 are set to correspond to the CT number of the cancer tissue absorbing the contrast agent, and the window width and window level of the second setting area 822 are set to the CT number of the soft tissue It is possible to distinguish the cancer tissue and the soft tissue from each other and to see them on a single screen. Also, for each of the cancer tissue and the soft tissues, the CT number difference within each tissue is expressed in the display image.

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

Each step of the CT image processing method according to the disclosed embodiments can be performed by an electronic device having a processor and a display unit capable of image processing. In the present specification, the CT image processing apparatus disclosed in this specification will be described focusing on an embodiment for performing the CT image processing method according to the disclosed embodiments. Therefore, the embodiments described for the CT image processing apparatus 100 are applicable to the CT image processing method, and conversely, the embodiments described for the CT image processing method are applicable 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 in this specification, and the embodiment is not limited thereto, and can be performed by various types of electronic apparatuses.

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

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

10 is a view illustrating a screen view according to an embodiment.

According to one embodiment, each of the plurality of setting areas may have the form of a plurality of view ports 1012a, 1012b, 1012c, and 1012d, as shown in FIG. The same CT image can be displayed on the respective view ports 1012a, 1012b, 1012c, and 1012d by display images 1010a, 1010b, 1010c, and 1010d of different window widths and window levels. For example, as shown in Fig. 10, a CT image of the front of the human head is displayed on each of the viewports 1012a, 1012b, 1012c, and 1012d, and the first viewport 1012a has a high (WL = 30) and a narrow window width (WW = 2000), and the second view port 1012b displays the display image 1010a having the window level (WL = 300) and the wide window width 300 can be displayed on the display screen 1010b. According to this embodiment, by displaying the CT images at different window levels in the plurality of view ports 1012a, 1012b, 1012c, and 1012d, the CT number areas of different ranges can be viewed on one screen, . Further, according to the present embodiment, CT images are displayed with different window widths in the plurality of view ports 1012a, 1012b, 1012c, and 1012d, so that only a desired CT number range is highlighted and displayed, So that the user convenience can be increased.

Information about window width WW and window level WL corresponding to each viewport 1012a, 1012b, 1012c, and 1012d is stored in each viewport 1012a, 1012b, 1012c, and 1012d, In a predetermined area 1022 of the display area 1023.

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

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

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

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

The CT image processing apparatus according to an exemplary embodiment may change variables except for the window width and the window level for two or more view ports together. For example, for two or more viewports, at the same time, at least one of the zoom factor, the rendering method, the display area, the slice interval, and the slice thickness can be changed together.

12 is a view illustrating a screen view 1210 displaying CT images in a plurality of setting areas according to an embodiment.

According to one embodiment, as shown in FIG. 12, CT images can be displayed on the plurality of view ports 1220a, 1220b, and 1220c at different window widths and window levels. For example, the first viewport 1220a has a window width and window level corresponding to the bone, the second viewport 1220b has a window width and window level corresponding to the heart, and the third viewport 1220c Quot;) < / RTI > lungs.

According to one embodiment, information 1230a, 1230b, and 1230c may be displayed for each viewport 1220a, 1220b, and 1220c about the window width and the portion of the object corresponding to the window level. The information 1230a, 1230b, and 1230c for the part of the object can be displayed in various forms such as text, graphics, and the like.

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

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

According to one embodiment, the screen view includes information about the window width and window level 1320a for the first setting area 1310a and information about the window width and window level 1320b for the second setting area 1310b ).

14 is a block diagram showing a CT image processing apparatus 100b according to an 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 the embodiment, the CT image processing apparatus 100b may include both the input unit 1410 and the communication unit 1420, or may include only one of them. 14 will not be described in conjunction with FIG. 4 described above.

The input unit 1410 or the communication unit 1420 can receive a control signal. The control signal may include, for example, a control signal for setting a plurality of setting areas, 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. The input unit 1410 receives the control signal generated by the user's operation.

The communication unit 1420 communicates wired or wirelessly with an external device. The communication unit 1420 can receive control signals, data, and the like from an external device, or transmit control signals, data, and the like to an external device. The communication unit 1420 may correspond to the communication unit 132 described above with reference to FIG. 2 and FIG.

The processing unit 410 may generate or change a plurality of setting areas in accordance with a control signal input through the input unit 1410 or the communication unit 1420. [ In addition, the processing unit 410 may set or change at least one of a window width and a window level for a plurality of setting areas in accordance with an input control signal.

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

FIG. 15 is a diagram illustrating a configuration area being created according to an embodiment.

According to one embodiment, a setting area may be generated according to a control signal received through the input unit 1410 or the communication unit 1420. [ 15, the user may drag the cursor 1502 from the first point 1504 to the second point 1506 to set the first setting area 1510a . By setting the second setting area 1510b and adding the first setting area 1510a, two setting areas having independent window widths and window levels are set.

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

FIG. 16 is a view showing a configuration area being created according to an embodiment.

According to one embodiment, the setting area may be copied and added according to the control signal received through the input unit 1410 or the communication unit 1420. [ For example, when the user clicks on one point 1602 of the first setting area 1610a and drag-and-drop (1606) to the second point 1604 with the first setting area 1610a set, The third setting area 1610c generated by copying the first setting area 1610 can be generated. By this input, in addition to the existing first setting area 1610a and the second setting area 1610b, a third setting area 1610c is generated. The CT image displayed in the first setting area 1610a may be displayed as it is in the third setting area 1610c generated by dragging and dropping the first setting area 1610a have. According to one embodiment, after the third setting area 1610c is created, a GUI for setting the window width and window level of the third setting area 1610c may be provided. The window width and window level of the third setting area 1610c may be set independently of the first setting area 1610a.

FIG. 17 is a diagram for explaining a process of adjusting a plurality of setting areas, a window width, and a window level according to an embodiment.

According to one embodiment, at least one of the positions and sizes of the plurality of setting areas may be changed according to the slice interval. The position and size may be changed only for a part of the plurality of setting areas according to the slice section, or the position and the size may be changed for all of the plurality of setting areas. Also, depending on 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.

17, for the first CT image 1704a corresponding to the first slice interval of the CT image data 1702, a first setting area 1710a and a second setting area A third setting region 1710c and a fourth setting region 1710d may be set for the second CT image 1704b corresponding to the second slice section. In addition, 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 area are changed according to the slice interval, and the window width and the window level may not be changed. According to another embodiment, only the window width and window level can be changed without changing the position and size of the setting area according to the slice section.

The slice section can 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, the window width, and the window level according to the slice interval may be preset by the user or automatically set by the processing unit 410. [

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

18 is a diagram for explaining a process of adjusting a plurality of setting areas, a window width, and a window level.

According to an embodiment, when the slice interval is changed, the position or size of a plurality of setting areas may be changed or the window width or window level may be changed according to the segmentation expressed in the CT image. A segmentation is a part of an object, for example, a part of an object such as a liver, stomach, heart, bone, and 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. 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 interval is changed. If the position and size of the segments 1820 and 1830 are changed as the slice interval is changed, the position and size of the setting area can 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 interval as shown in Fig. 18, and the second setting area 1840b corresponding to the second segmentation 1830 May be changed according to the slice interval as shown in FIG.

According to one embodiment, the CT image processing apparatus recognizes the segmentation corresponding to each setting region from the CT image, and can change the position and size of each setting region according to the change of the position and size of the segmentation.

According to another 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 region according to the position and size of the segmentation The position and size of the setting area can be adjusted so as to correspond to the position and size of the segmentation according to the slice section.

According to one embodiment, the CT image processing apparatus can adjust the window width and the window level for the setting area in accordance with the change of the segment number of the segmentation according to the change of the slice section.

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

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

In the image display portion 1910, CT images are displayed on a plurality of viewports. Each viewport can have different window widths and window levels. According to another embodiment, a CT image and a plurality of setting areas may be displayed in the form as described with reference to Fig. 13 prior to the image display part 1910. Fig.

According to one embodiment, the CT image displayed on the image display portion 1910 may be displayed with a preview image reflecting the changed setting value according to the control signal input through the operation portion 1920. [

The manipulation 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, (1990). ≪ / RTI > The manipulation portion 1920 may be implemented in various combinations of portions. That is, various combinations of GUI screen views including all or some of the GUI portions shown in FIG. 19 may be generated.

The layout selection portion 1930 may receive a control signal that selects the number and arrangement of viewports. The scale grid selection portion 1940 may receive a control signal that selects whether to display the scale grid, or a control signal that selects the spacing or shape of the scale grid.

Preset portion 1960 may receive a control signal that selects a segmentation. The preset portion 1960 may include a selection key corresponding to each segmentation, including, for example, a picture or textual description of the segmentation. The CT image processing apparatus can set the window width and window level to values corresponding to the segmentation selected by the preset section 1960. [

The filter selection portion 1970 may receive a control signal that selects the type of filter to be applied to at least one viewport of the image display portion 1910. [ When the type of the 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 the selected CT image on the corresponding view port.

The window width and window level setting portion 1980 may receive a control signal that sets the window width and window level of the selected setting area.

The zoom factor setting portion 1990 may receive a control signal for setting the zoom factor. In accordance with the control signal for setting the zoom factor, the CT image processing apparatus can change the zoom factor of the CT image displayed in the image display portion 1910. [ For example, the CT image displayed on the image display portion 1910 may be enlarged or displayed 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 the reference line. The CT image processing apparatus may or may not display the reference line on the CT image display portion 1910 in accordance with a control signal for selecting whether to display the reference line.

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 display or not display the annotation information included in the header portion together 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 set values of the operation section 1920 to default values. The default value may be stored in advance.

When the key 1984 is selected, information on the setting area, window width, and window level set for each CT image is stored. Information on the set area, window width, and window level can be stored in the CT image file or in a separate file. Also, if 1984 is selected, the currently set screen layout can be saved together with the CT image. For example, if 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 showing a GUI screen according to an embodiment.

According to one embodiment, the preset portion 1960 and the window width and window level setting portion 1980 are displayed on the GUI screen, and the processing portion 410 (see FIG. 4) displays the preset portion 1960, The window width and window level can be set via the user input received through portion (1980). The arrangement and configuration of the GUI screen, the types of the segmentation icons 2012a, 2012b, 2012c, and 2012d to be displayed, and the like can be changed according to specific embodiments.

Preset portion 1960 is a GUI area that can select a body part or tissue and set window width and window level. Preset portion 1960 includes at least one icon 2012a, 2012b, 2012c, 2012d that represents a body part or tissue. The CT number range corresponding to the CT number corresponding to the body part or the tissue of the selected icon 2012a is selected as the window width and window level (2012a, 2012b, 2012c, 2012d) (S2002). For example, if icons 2012a, 2012b, 2012c, 2012d indicating the brain, lung, abdomen, kidney, bone and the like are displayed in the preset part 1960 and the user selects the icon 2012a corresponding to the brain, The CT number range (for example, -120 to 180) corresponding to the brain is set to the window width and window level. The set value set by the input through the preset portion 1960 can be displayed in the window width and window level setting portion 1980. [ The selected icon 2012a can be displayed separately 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 can 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) The window width display portion 2022 is selected by the input signal through the window 2012. When the set value of the window width is input, the window width is changed according to the input set value. Similarly, the window level display portion 2024 is selected by the input signal through the input portion 1410, and when the set value of the window level is input, the window level is changed according to the input set value.

According to the present embodiment, the user can set the 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. Accordingly, the user can easily set the window width and the window level for the segmentation of interest to the user, and can fine-tune the preset, thereby increasing the user's convenience.

The disclosed embodiments may be implemented in a software program that includes instructions stored on a computer-readable storage medium.

The computer may include a CT system according to the disclosed embodiments as an apparatus capable of calling stored instructions from a storage medium and being operable in accordance with the disclosed embodiments according to the called instructions.

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 whether data is stored semi-permanently or temporarily on the storage medium.

Furthermore, the CT system or method according to the disclosed embodiments may be provided in a computer program product. A computer program product can be traded between a seller and a buyer as a product.

The computer program product may include a computer readable storage medium having stored thereon a software program and a software program. For example, a computer program product may include a manufacturer of a CT system or a product in the form of a software program (e.g., a downloadable application) electronically distributed via an electronic marketplace (e.g. Google Play Store, App Store) have. For electronic distribution, at least a portion of the S / W program may be stored on a storage medium or may be created temporarily. 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 for temporarily storing an SW program.

The computer program product may comprise a storage medium of a server or a storage medium of a terminal, in a system consisting of a server and a terminal (e.g., a CT system). Alternatively, if there is a third device (e.g., a smart phone) in communication with the server or 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 the computer program product to distribute the method according to the disclosed embodiments.

For example, a server (e.g., a cloud server or an artificial intelligence server, etc.) may execute a computer program product stored on a server to control the terminal communicating with the server to perform the method according to the disclosed embodiments.

As yet another example, a third device may execute a computer program product to control a terminal communicatively coupled to a third device to perform the method according to the disclosed embodiment. As a specific example, the third device controls the CT system by remote control so that the CT system irradiates the X-ray to the object, generates an image of a site inside the object based on the radiation information detected by the X- can do.

As yet another example, the third device may execute the computer program product to perform the method according to the disclosed embodiment directly based on the value input from the auxiliary device (e.g., the gantry of the CT system). As a specific example, the ancillary apparatus can irradiate the object with X-rays and obtain the detected radiation information through the object. The third apparatus receives the radiation information detected from the auxiliary apparatus, and can generate an image of a region inside the object based on the inputted radiation information.

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

The embodiments disclosed with reference to the accompanying drawings have been described above. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. The disclosed embodiments are illustrative and should not be construed as limiting.

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

Claims (20)

A display unit that displays a plurality of CT images corresponding to the plurality of setting areas; And
Wherein the control unit sets a window width and a window level for each of the plurality of setting areas of the display unit and sets the window width and the window level corresponding to the plurality of setting areas, And a processing unit for generating a CT image,
Wherein the plurality of setting areas have different window levels,
Wherein the plurality of CT images correspond to the same slice of the same data set. The method according to claim 1,
Wherein each of the plurality of setting areas corresponds to a view port of the display unit. 3. The method of claim 2,
Wherein the CT image processing apparatus further includes an input unit for receiving a control signal for controlling a screen view,
Wherein the processing unit changes 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 according to claim 1,
Wherein the plurality of setting areas correspond to different areas on a display unit defined in one CT image. 5. The method of claim 4,
Wherein the CT image processing apparatus further comprises an input section for receiving a control signal for setting the plurality of setting areas,
Wherein the processing unit performs at least one of adding a setting area, deleting a setting area, changing an area of the setting area, changing the window width of the setting area, and changing the window level of the setting area based on the control signal. CT image processing device. 6. The method of claim 5,
And a storage unit for storing information on a setting area, a window width, and a window level set according to the control signal. 5. The method of claim 4,
Wherein the CT image processing apparatus further comprises an input section for receiving a control signal for setting the plurality of setting areas,
Wherein the processing section generates on the screen view another setting area for displaying the same CT image data displayed in the setting area selected by the control signal among the plurality of setting areas. 5. The method of claim 4,
Wherein a window width and a window level of the plurality of setting areas are differently defined according to a slice interval of the CT image. 5. The method of claim 4,
Wherein the position and size of the plurality of setting areas are differently defined according to a slice interval of the CT image data. 5. The method of claim 4,
Wherein at least one of a position, a size, a window width, and a window level of the plurality of setting areas is differently defined according to a segmentation of a target object expressed in the CT image data. Setting a window width and a window level for each of a plurality of setting areas;
Generating the plurality of CT images converted according to a window width and a window level corresponding to each of the plurality of setting areas; And
And displaying a screen view showing the plurality of CT images corresponding to each of the plurality of setting areas,
Wherein the plurality of setting areas have different window levels,
Wherein the plurality of CT images correspond to the same slice of the same data set. 12. The method of claim 11,
Wherein each of the plurality of setting areas corresponds to a view port of the display unit. 13. The method of claim 12,
Receiving a control signal for controlling a screen view; And
Further comprising changing at least one of a rendering method, a zooming setting value, and a slice interval of the plurality of setting areas based on the control signal. 12. The method of claim 11,
Wherein the plurality of setting areas correspond to different areas on a display unit defined in one CT image. 15. The method of claim 14,
Receiving a control signal for setting the plurality of setting areas; And
Performing at least one of adding a setting area, deleting the setting area, changing the area of the setting area, changing the window width of the setting area, and changing the window level of the setting area based on the control signal CT image processing method. 16. The method of claim 15,
And storing information about a set region, a window width, and a window level set according to the control signal. 15. The method of claim 14,
Receiving a control signal for setting the plurality of setting areas; And
Further comprising generating, on the screen view, another setting area for displaying the same CT image data displayed in the setting area selected by the control signal among the plurality of setting areas. 15. The method of claim 14,
Wherein the window width and the window level of the plurality of setting areas are differently defined according to the slice interval of the CT image. 15. The method of claim 14,
Wherein the position and size of the plurality of setting areas are differently defined according to a slice interval of the CT image data. A computer program product comprising a computer readable storage medium,
Setting a window width and a window level for each of a plurality of setting areas;
Generating the plurality of CT images converted according to a window width and a window level corresponding to each of the plurality of setting areas; And
And displaying a screen view representing the plurality of CT images corresponding to each of the plurality of setting areas,
Wherein the plurality of setting areas have different window levels,
Wherein the plurality of CT images correspond to the same slice of the same data set.

Images