JP5518970B2 - Image display device - Google Patents

Description

The present invention relates to an image display device, and more particularly to an image display device that enables comparative observation of current image data and past image data collected by an image diagnostic device.

Medical diagnostic imaging uses X-ray CT equipment and MRI that have been put into practical use with the development of computer technology.
Rapid progress has been made with devices and the like, making them indispensable in today's medical care.
In particular, in recent X-ray CT apparatuses and MRI apparatuses, real-time display of two-dimensional image data becomes possible with the increase in the speed and performance of biological information detection apparatuses and arithmetic processing apparatuses. Generation and display are now easier.

In recent years, when a subject is diagnosed using three-dimensional image data (hereinafter referred to as diagnostic image data) collected by a current examination by the above-described medical image diagnostic apparatus, a past examination is performed. The three-dimensional image data (hereinafter referred to as past image data) collected in step S1 and stored in the storage unit is read as reference image data, and the obtained reference image data and diagnostic image data are compared and displayed. As a result, a method for improving the diagnostic accuracy has been carried out. In particular, when sufficient resolution cannot be obtained in the diseased part of the diagnostic image data obtained in the current examination, the deterioration of diagnostic accuracy is prevented by performing comparison display with the reference image data as described above. be able to.

Past image data suitable for comparative display with diagnostic image data from among many past image data collected in past examinations for the purpose of comparing and displaying such diagnostic image data and reference image data Is selected as reference image data, a method has been proposed in which desired three-dimensional image data is searched based on a specific feature amount obtained by performing statistical processing on the three-dimensional image data ( For example, see Patent Document 1.)

JP 2001-117936 A

When sufficient resolution is obtained in any of the diagnostic image data and the past image data, suitable reference image data can be obtained by applying the method described in Patent Document 1. However, as described above, if sufficient resolution is not ensured in the diseased part or the like of the diagnostic image data, it is difficult to retrieve the reference image data because accurate statistical processing becomes impossible. Further, since statistical processing for past image data requires a lot of time, there is a problem that diagnostic efficiency is remarkably lowered.

The present invention has been made in view of the above-described problems, and the object thereof is diagnostic image data collected in a current examination by a medical image diagnostic apparatus and reference images collected in a past examination. When comparing and displaying data, it is possible to quickly and accurately search for reference image data having a region of interest suitable for comparison and display with diagnostic image data from among many past image data collected in advance. An object is to provide an image display device.

In order to solve the above problem, an image display device according to a first aspect of the present invention includes a region-of-interest setting unit that sets a region of interest for image data generated by a medical image diagnostic apparatus, and a disease information. A first label information input unit configured to be able to input one label information in association with the region of interest, and an interest of the region of interest in which the first label information is associated by the first label information input unit Data storage means for storing region data and the image data in association with each other as reference image data; second label information input means for inputting second label information related to the first label information; said second and reference image data extraction means for extracting the reference image data we were associated with the first label information corresponding to the label information, before Symbol reference image data The reference image data extraction means has extracted is characterized in that a display means for table Shimesuru.

According to the present invention, when comparing and displaying the diagnostic image data collected in the current examination by the medical image diagnostic apparatus and the reference image data collected in the past examination, many past images collected in advance are displayed. Reference image data having a region of interest suitable for comparison display with diagnostic image data can be searched for in a short time and accurately. For this reason, it becomes possible to greatly improve the diagnostic efficiency and diagnostic accuracy for the subject.

1 is a block diagram showing the overall configuration of an image display device in an embodiment of the present invention. The block diagram which shows the specific structure of the image data generation part with which the image display apparatus of the Example is provided. The figure for demonstrating the setting method of the three-dimensional region of interest with respect to the three-dimensional image data of the Example. The figure which shows the specific example of the 2nd display data which the display part of the Example produces | generates for the purpose of the display of the reference image data candidate. The figure which shows the specific example of the 3rd display data which the display part of the Example produces | generates for the purpose of the comparison display of diagnostic image data and reference image data. 6 is a flowchart showing a procedure for storing past image data in the embodiment. The flowchart which shows the comparison display procedure of the diagnostic image data and reference image data in the Example. The figure which shows the modification of the 3rd display data which the display part of the Example produces | generates.

  Embodiments of the present invention will be described below with reference to the drawings.

The image display apparatus according to the embodiment of the present invention sets a three-dimensional region of interest to three-dimensional image data (past image data) generated in a past examination, and adds the past image data and first label information. The position information of the three-dimensional region of interest (hereinafter referred to as region-of-interest data) is stored in a data storage unit. On the other hand, three-dimensional image data (diagnosis image data) in the current examination
A plurality of past images in which the region-of-interest data to which the first label information corresponding to the input second label information is added and the three-dimensional region of interest having the region-of-interest data are set Data is extracted from the data storage unit as reference image data candidates. Then, the reference image data selected from the reference image data candidates and the diagnostic image data are compared and displayed.

In the embodiment described below, three-dimensional image data of a blood vessel site is generated as diagnostic image data based on the volume data of the subject collected in the current examination by the medical image diagnostic apparatus, and this diagnostic data is used. The case of comparing and displaying the image data and the reference image data of the blood vessel part collected in the past examination for the subject or another subject will be described. However, the diagnosis target part is not limited to the blood vessel part. Alternatively, the diagnostic image data and the reference image data to be compared and displayed may be other image data such as MPR (Multi Planar Reconstruction) image data. Furthermore, although an image display apparatus configured independently of the medical image diagnostic apparatus will be described, an image display apparatus incorporated in the medical image diagnostic apparatus may be used.

(Device configuration and functions)
The configuration and function of the image display apparatus in this embodiment will be described with reference to FIGS. However, FIG. 1 is a block diagram illustrating the overall configuration of the above-described image display device, and FIG. 2 is a block diagram illustrating a specific configuration of an image data generation unit included in the image display device.

An image display apparatus 100 shown in FIG. 1 includes a volume data storage unit 1 for storing volume data collected in a current examination and a past examination by a medical image diagnostic apparatus (not shown), and three-dimensionally processing the volume data. An image data generating unit 2 that generates image data and MPR image data; a three-dimensional region-of-interest setting unit 3 that sets a three-dimensional region of interest for a diseased part of the generated three-dimensional image data; Of the 3D region of interest to which the first label information corresponding to the 3D image data (past image data) collected in the past examination of the subject and the diseased part or disease name of the subject is added. Based on the data storage unit 4 for storing the position information (region of interest data) and the second label information supplied from the input unit 7 described later,
A plurality of past image data suitable for comparison display with the three-dimensional image data (diagnosis image data) collected in the current examination for the subject as a reference image data candidate as the data storage unit 4
Is provided with a reference image data extraction unit 5 for extracting from many past image data stored in the database.

Further, the image display device 100 displays the reference image data candidates extracted by the reference image data extraction unit 5, and the reference image data selected from these reference image data candidates and the diagnostic image data. Display unit 6 for performing comparison display, setting of two-dimensional region of interest for MPR image data, input of label information (first label information and second label information), selection of reference image data, various command signals An input unit 7 for performing input and the like, and an image display device 10
A system control unit 8 that controls the above-described units of 0 in an integrated manner is provided.

  Next, specific examples of each unit described above will be described in more detail.

The volume data storage unit 1 in FIG. 1 has a large-capacity storage circuit, and is collected by a current examination and a past examination using a medical image diagnostic apparatus such as an X-ray CT apparatus or an MRI apparatus (not shown). The volume data supplied via the storage medium is saved.

As shown in FIG. 2, the image data generation unit 2 includes a three-dimensional image data generation unit 21 and a two-dimensional image data generation unit 22.

The 3D image data generation unit 21 has a function of rendering the volume data supplied from the volume data generation unit 1 to generate 3D image data such as volume rendering image data and surface rendering image data. An opacity / hue setting unit 211 and a rendering processing unit 212 are provided. And the opacity / hue setting part 2
11 sets the opacity and hue of each voxel based on the voxel value of the volume data, the voxel position information, and the like. The rendering processing unit 212 sets the opacity and hue set by the opacity / hue setting unit 211. The volume data is rendered based on the information to generate three-dimensional image data.

On the other hand, the two-dimensional image data generation unit 22 extracts an MPR cross-section setting unit 221 that sets an MPR cross section for the volume data supplied from the volume data generation unit 1, and extracts voxels of the volume data in the MPR cross-section to extract the MPR. An MPR image data generation unit 222 that generates image data is provided. For example, using volume data, MPR of a blood vessel site
When generating the image data, the MPR cross-section setting unit 221 described above is configured so that the core line data generation unit generates the center axis of the blood vessel lumen in the volume data as core line data, and the core line data is linearly extended. It has a straight volume data generator (not shown) that reconstructs the volume data and generates straight volume data.
The core data generation unit generates a start point and an end point specified by the input unit 7 for the blood vessel lumen of the three-dimensional image data generated using the volume data and displayed on the display unit 6 along the blood vessel lumen. Core wire data is generated by connecting them together. Note that a specific method for generating the core wire data is described in Japanese Patent Application Laid-Open No. 2008-67991, etc., and thus detailed description thereof is omitted.

On the other hand, the straight volume data generation unit reconstructs the volume data so that the above-described core data is extended in a straight line, and generates straight volume data. That is, the straight volume data generation unit extracts voxels in a plurality of planes perpendicular to the core line data set in the blood vessel lumen of the volume data, and these planes are parallel to each other to form the core line data in a straight line. The voxels are rearranged as follows. Then, processing such as interpolation is performed on these voxels to generate straight volume data, and the first MPR cross section including linear core data and the second MPR cross section perpendicular to the core data are converted into straight volume data. Set for

Next, the MPR image data generation unit 22 provided in the two-dimensional image data generation unit 22 of FIG.
2 extracts voxels of straight volume data in the first MPR cross section set by the MPR cross section setting unit 221 to generate first MPR image data indicating the longitudinal cross section of the blood vessel. Voxels of straight volume data in the MPR cross section are extracted to generate second MPR image data indicating the cross section of the blood vessel.

Returning to FIG. 1, the three-dimensional region-of-interest setting unit 3 is generated by the image data generation unit 2 and displayed on the display unit 6.
The position information of the two-dimensional region of interest set by the input unit 7 is processed with respect to the first MPR image data and the second MPR image data displayed on the screen, and the three-dimensional region of interest is set with respect to the three-dimensional image data described above To do. The method for setting the three-dimensional region of interest will be described in more detail with reference to FIG.

FIG. 3 shows past image data D1, first MPR image data D2, and second MPR image data D3 generated by the image data generation unit 2 and displayed on the display unit 6 in the past examination. The operator of the image display apparatus 100 inputs the slide bar Sb superimposed on the first MPR image data D2 on the input unit 7 while observing these image data displayed on the display unit 6. The slide bar Sb is moved sequentially in the core wire direction d using the device.
A two-dimensional region of interest Ra is set with respect to the second MPR image data D3 generated by the image data generation unit 2 based on the position information. Then, the three-dimensional region-of-interest setting unit 3 interpolates the position information of a plurality of two-dimensional regions of interest Ra supplied from the input unit 7 via the system control unit 8 with respect to the core direction d, thereby performing a three-dimensional region of interest. Rb is formed, and this three-dimensional region of interest Rb is set as past image data D1.

Note that Pa and Pb in FIG. 3 indicate the start point and the end point set in the lumen of the blood vessel Vs,
Cp indicates core data formed by connecting the start point Pa and the end point Pb. Further, in the right region of FIG. 3, a display unit for first label information (for example, “stenosis portion”) added to the region-of-interest data of the three-dimensional region of interest Rb is provided.

Returning to FIG. 1 again, the data storage unit 4 has a past image data storage unit and a region-of-interest data storage unit (not shown). In the past image data storage unit, past image data (three-dimensional image data) generated by the three-dimensional image data generation unit 21 of the image data generation unit 2 in the past examination is stored as image data identification information as supplementary information. The region-of-interest data storage unit includes the first label information supplied from the input unit 7 and the image data identification information of the region-of-interest data supplied from the three-dimensional region-of-interest setting unit 3. Stored as information.

That is, the past image data collected in the past examination is stored in the past image data storage unit, and the region-of-interest data of the three-dimensional region of interest set for the past image data corresponds to the disease part, disease name, etc. The first label information to be stored as supplementary information is stored in the region-of-interest data storage unit. The past image data and the region-of-interest data are associated with each other by image data identification information added to each data.

Next, the reference image data extraction unit 5 includes a label information search unit that searches for the first label information added to the region-of-interest data in the region-of-interest data storage unit, and the searched first label information. A data extraction unit (each of which extracts from the region-of-interest data storage unit and the past image data storage unit of the data storage unit 4 the region-of-interest data of the three-dimensional region of interest and past image data in which the three-dimensional region of interest is set. (Not shown).

The label information search unit receives second label information supplied from the input unit 7 via the system control unit 8 in the current examination, and stores a number of data stored in the region of interest data storage unit of the data storage unit 4. The first label information corresponding to the second label information (ie, having the same label information or similar label information) among the first label information added to each region of interest data
Search the label information of.

The data extraction unit extracts a plurality of region-of-interest data having the first label information searched by the label information search unit from many regions of interest data stored in the region-of-interest data storage unit. Further, a plurality of past image data set with these region-of-interest data is extracted from many past image data stored in the past image data storage unit as reference image data candidates.

Next, the display unit 6 includes a display data generation unit 61 and a monitor 62, displays 3D image data and MPR image data for the purpose of setting a 3D region of interest, displays reference image data candidates, and further. Comparison display between the diagnostic image data and the reference image data is performed.

That is, the display data generation unit 61 of the display unit 6 sets the past image data, the first MPR image data, and the second MPR image data generated by the image data generation unit 2 when setting the three-dimensional region of interest for the past image data. Are combined to generate first display data (see FIG. 3). In addition, the display data generating unit 61 displays the reference image data candidates extracted from the data storage unit 4 based on the second label information supplied from the input unit 7 when displaying the reference image data candidates. A three-dimensional region of interest based on the region of interest data extracted from 4 is superimposed. And 3
Second display data is generated by arranging a plurality of reference image data candidates on which the dimensional region of interest is superimposed in parallel.

FIG. 4 shows a specific example of the second display data. For example, the past image data C-1 to C-6 and the region of interest corresponding to these past image data based on the second label information. When data is extracted from the data storage unit 4, the display data generation unit 61 past image data C-1 to C-6 on which three-dimensional regions of interest Rb-1 to Rb-6 based on the region of interest data are superimposed. Are arranged in parallel to generate second display data.

Further, the display data generation unit 61 performs reference display selected from the diagnostic image data generated in the current examination and the above-described reference image data candidates when comparing and displaying the diagnostic image data and the reference image data. Third display data is generated by arranging the image data in parallel.

FIG. 5 shows a specific example of the third display data. The display data generating unit 61 displays the reference image in which the diagnostic image data (FIG. 5A) and the three-dimensional region of interest Rb are superimposed. Data (FIG. 5B) is arranged in parallel to generate third display data. Then, the display data generation unit 61
Each of the first display data to the third display data generated by the above is subjected to a predetermined conversion process as necessary and displayed on the monitor 62.

As shown in FIGS. 4 and 5, each of the reference image data candidates constituting the second display data has a three-dimensional interest based on the region-of-interest data to which the first label information is added. Similarly, the area is superimposed on the reference image data constituting the third display data.
Dimensional regions of interest are superimposed. In this case, the three-dimensional region of interest can be highlighted by superimposing the three-dimensional region of interest having a predetermined hue and opacity on the reference image data candidate or the reference image data. In particular, when the three-dimensional region of interest corresponding to the first label information and the three-dimensional region of interest corresponding to other label information are superimposed on the same reference image data candidate or reference image data, the first label By highlighting the three-dimensional region of interest corresponding to information by the above-described method, it is possible to easily identify the three-dimensional region of interest corresponding to other label information.

On the other hand, the input unit 7 includes input devices such as a display panel, a keyboard, a trackball, a mouse, a selection button, and an input button on the operation panel, and the second M generated in the past examination.
A region-of-interest setting function 71 for setting a two-dimensional region of interest having a predetermined geometric shape or arbitrary shape for PR image data, a label information input function 72 for labeling region-of-interest data of a three-dimensional region of interest, and a plurality of An image data selection function 73 for selecting reference image data from among reference image data candidates. Also, input of subject information, setting of generation conditions and display conditions of various image data, setting of the position of the slide bar in the first MPR image data, setting of the start point and end point for the blood vessel lumen of the past image data, three-dimensional interest Setting of opacity and hue for the area, and input of various command signals are also performed using the above-described display panel and input device.

The system control unit 8 includes a CPU and a storage circuit (not shown), and various information input / set / selected by the input unit 7 is stored in the storage circuit. Then, the CPU comprehensively controls each unit of the image display device 100 based on these pieces of information, and corresponds to the second label information from among a lot of past image data stored in the data storage unit 4. A plurality of past image data is extracted as reference image data candidates. Then, the reference image data selected from these reference image data candidates and the diagnostic image data collected in the current examination are compared and displayed.

(Storing procedure of past image data)
Next, a procedure for storing past image data in this embodiment will be described with reference to the flowchart of FIG.

When storing past image data in which a three-dimensional region of interest is set, the volume data storage unit 1 of the image display apparatus 100 is collected in the past examination by the medical image diagnostic apparatus and supplied via a network or a storage medium. The volume data of the subject or another subject is stored (step S1 in FIG. 6).

Next, the three-dimensional image data generation unit 21 of the image data generation unit 2 sets opacity and hue for the voxels of the volume data read from the volume data storage unit 1 and then renders to generate three-dimensional image data. The obtained three-dimensional image data is displayed on the display unit 6
Is displayed on the monitor 62 (step S2 in FIG. 6).

The operator of the image display apparatus 100 that observed the above-described three-dimensional image data displayed on the display unit 6 uses, for example, the blood vessel indicated in the three-dimensional image data using the input device provided in the input unit 7. A start point and an end point are set for the center of the lumen.

The two-dimensional image data generation unit 22 of the image data generation unit 2 that has received the position information of the start point and the end point from the input unit 7 via the system control unit 8 sets the start point and end point set in the volume data described above in the blood vessel. By connecting along the cavity, core data is generated, and the volume data is reconstructed so that the core data is extended in a straight line to generate straight volume data. Then, a first MPR section including linear core line data and a second MPR section perpendicular to the core line data are set for the straight volume data.

Further, the two-dimensional image data generation unit 22 extracts the voxels of the straight volume data in the first MPR section to generate the first MPR image data indicating the longitudinal section of the blood vessel, and the straight volume in the second MPR section. Voxels of the data are extracted to generate second MPR image data indicating the cross section of the blood vessel. Then, the obtained first MPR image data and second MPR image data are displayed on the monitor 62 of the display unit 6 together with the above-described three-dimensional image data (step S3 in FIG. 6).

If the display unit 6 displays the three-dimensional image data and the MPR image data,
The operator moves the slide bar Sb superimposed on the first MPR image data in the core line direction at a predetermined interval using the input device of the input unit 7. Then, a two-dimensional region of interest is set for the blood vessel part of the second MPR image data generated by the two-dimensional image data generation unit 22 of the image data generation unit 2 at the position where the slide bar Sb is set ( Step S of FIG.
4).

On the other hand, the three-dimensional region-of-interest setting unit 3 forms a three-dimensional region of interest by interpolating the position information of a plurality of two-dimensional regions of interest supplied from the input unit 7 via the system control unit 8 with respect to the core line direction. Then, the obtained three-dimensional region of interest is set as the above-described three-dimensional image data and displayed on the monitor 62 of the display unit 6 (step S6 in FIG. 6).

The operator who has observed the above-described 3D image data displayed on the display unit 6 confirms the validity of the 3D region of interest set in the 3D image data, and then handles the diseased part in the input unit 7. The first label information is input (step S7 in FIG. 6).

The above-described 3D image data generated by the 3D image data generation unit 21 of the image data generation unit 2 is stored as past image data in the past image data storage unit of the data storage unit 4 together with the image data identification information. . On the other hand, the region-of-interest data of the three-dimensional region of interest supplied from the three-dimensional region-of-interest setting unit 3 uses the first label information and the image data identification information supplied from the input unit 7 as supplementary information in the data storage unit 4. It is preserve | saved at a region-of-interest data storage part (step S8 of FIG. 6).

(Comparison display procedure of diagnostic image data and reference image data)
Next, a comparison display procedure between the diagnostic image data and the reference image data in this embodiment will be described with reference to the flowchart of FIG.

When comparing and displaying the reference image data extracted / selected from the past image data and the diagnostic image data collected in the current examination, the volume data storage unit 1 of the image display device 100 stores the medical image diagnosis. The volume data of the subject collected by the current examination by the apparatus and supplied via a network or a storage medium is stored (step S1 in FIG. 7).
1).

The three-dimensional image data generation unit 21 of the image data generation unit 2 sets the opacity and hue for the voxels of the volume data read from the volume data storage unit 1 and then renders them to perform three-dimensional rendering as diagnostic image data. Image data is generated, and the obtained diagnostic image data is displayed on the monitor 62 of the display unit 6 (step S12 in FIG. 7).

The operator of the image display apparatus 100 who has determined that the comparison display with the reference image data is necessary because the resolution of the diseased part in the above-described diagnostic image data displayed on the display unit 6 is insufficient, the input unit 7 uses the disease After inputting the second label information corresponding to the part, a command signal for executing comparison display between the diagnostic image data and the reference image data is input (step S13 in FIG. 7).

The label information search unit of the reference image data extraction unit 5 that has received the command signal and the second label information from the input unit 7 via the system control unit 8 is stored in the region of interest data storage unit of the data storage unit 4. The first label information corresponding to the second label information is retrieved from the first label information added to each of the plurality of region-of-interest data. Then, the data extraction unit of the reference image data extraction unit 5 has a plurality of interests having the first label information searched by the label information search unit from among many regions of interest data stored in the region of interest data storage unit. Region data is extracted, and a plurality of past image data in which a three-dimensional region of interest of the region-of-interest data is set is selected as a reference image data candidate from many past image data stored in the past image data storage unit. Extract. Then, a three-dimensional region of interest based on the region-of-interest data is superimposed on each reference image data candidate and displayed on the monitor 62 of the display unit 6 (step S14 in FIG. 7).

Next, the operator who observed the plurality of reference image data candidates displayed on the display unit 6
From these reference image data candidates, reference image data suitable for comparison display with diagnostic image data is selected using the input device of the input unit 7 (step S15 in FIG. 7). Then, the display unit 6 displays the diagnostic image data generated in step S12 and the step S12.
The reference image data selected from the reference image data candidates in 15 is compared and displayed on the monitor 62 of the display unit 6 (step S16 in FIG. 7).

According to the embodiment of the present invention described above, when the diagnostic image data collected in the current examination by the medical image diagnostic apparatus and the reference image data collected in the past examination are compared and displayed, they are collected in advance. The reference image data having a region of interest suitable for comparison display with the diagnostic image data can be searched for in a short time and accurately from the many past image data. For this reason, it is possible to greatly improve the diagnostic efficiency and diagnostic accuracy for the subject.

In particular, according to the present embodiment, since the reference image data having the three-dimensional region of interest is searched from the past image data based on the label information corresponding to the disease part, disease name, etc., the diagnostic image data Even when the resolution is insufficient, the reference image data used for comparison display with the diagnostic image data can be reliably searched. Search for reference image data
Since complicated image processing and signal processing as described in Patent Document 1 are not required, the processing can be performed in a very short time.

In this embodiment, since a three-dimensional region of interest with a predetermined hue and opacity set is superimposed on the reference image data or the reference image data candidate, the region where the diagnosis target part exists is emphasized. Can be displayed.

Further, in this embodiment, a plurality of past image data is automatically set as reference image data candidates by collating the first label information input in the past examination with the second label information inputted in the current examination. Then, since the reference image data is selected from the reference image data candidates at the operator's discretion, the best reference image data for comparison display with the diagnostic image data is searched with high accuracy. can do.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, in the above-described embodiments, the image display apparatus configured independently of the medical image diagnostic apparatus has been described. However, an image display apparatus incorporated in the medical image diagnostic apparatus may be used. Moreover, although the case where the blood vessel part is set as the diagnosis target part has been described, it may be another disease part.

Further, in the above-described embodiment, a plurality of past image data is selected from the many past image data collected in the past examination by comparing the first label information and the second label information as reference image data candidates. The reference image data suitable for comparison display with the diagnostic image data is selected from these reference image data candidates. However, one past image data is selected as the reference image data candidate. When extracted, this past image data may be used as reference image data. It should be noted that a normal database search technique can be applied to search for the first label information similar to the second label information.

In the above-described embodiment, the case where one three-dimensional region of interest is set for one past image data as shown in FIGS. 3 to 5 has been described. The above three-dimensional region of interest may be set, and the same first for the plurality of three-dimensional regions of interest.
Label information may be set.

Furthermore, in the comparative display of the diagnostic image data and the reference image data, the case where the three-dimensional image data obtained from the same direction is displayed in parallel has been described. However, the present invention is not limited to this. These directions may be arbitrarily updated, and their relative sizes may be arbitrarily updated.

On the other hand, in the above-described embodiment, three-dimensional image data as past image data is generated based on the volume data of the subject or other subject collected in the past examination by the medical image diagnostic apparatus, and the current Although the case where three-dimensional image data as diagnostic image data is generated based on the volume data of the subject collected in the examination has been described, past image data and diagnostic image data are generated using the volume data. MPR image data or MIP (Maximum Intensity Projection) image data may be used. The MPR image data may be generated using straight volume data constructed by rearranging voxels of volume data.

In this case, the input unit 7 is newly provided with a display mode selection function for displaying any one of the three-dimensional image data, the MPR image data, and the MIP image data. The supplied volume data is input from the input unit 7 to the system control unit 8.
The past image data and the diagnostic image data are generated by processing in accordance with the display mode selection signal supplied via.

FIG. 8 shows MPR image data (a) as diagnostic image data generated by setting an MPR cross section (first MPR cross section) including core line data Cp with respect to straight volume data;
MPR image data (b) as reference image data is shown, and a two-dimensional or three-dimensional region of interest Rc is superimposed on the MPR image data as reference image data.

DESCRIPTION OF SYMBOLS 1 ... Volume data storage part 2 ... Image data generation part 21 ... Three-dimensional image data generation part 211 ... Opacity and hue setting part 212 ... Rendering process part 22 ... Two-dimensional image data generation part 221 ... MPR cross-section setting part 222 ... MPR Image data generation unit 3... 3D region of interest setting unit 4 Data storage unit 5 Reference image data extraction unit 6 Display unit 61 Display data generation unit 62 Monitor 7 Input unit 71 Region of interest setting function 72 Label information input function 73 ... image data selection function 8 ... system control unit 100 ... image display device

Claims (8)

Region-of-interest setting means for setting an arbitrary region in the image data generated by the medical image diagnostic apparatus as a region of interest;
First label information input means configured to allow an operator to input first label information including disease information in association with the region of interest;
Data storage means for storing the region-of-interest data of the region of interest associated with the first label information by the first label information input means and the image data in association with each other, and storing as reference image data;
Second label information input means for inputting second label information related to the first label information;
Reference image data extraction means for extracting the reference image data associated with the first label information corresponding to the second label information;
An image display apparatus comprising: display means for displaying the reference image data extracted by the reference image data extraction means. The image display apparatus according to claim 1, wherein the display unit displays the extracted reference image data and diagnostic image data collected in a current examination in comparison. The image data is three-dimensional image data generated by rendering the volume data collected by the medical image diagnostic apparatus,
The image display device according to claim 1, wherein the region-of-interest setting unit sets a three-dimensional region of interest for the three-dimensional image data as the image data. The region-of-interest setting means sets a two-dimensional region of interest for each of the MPR image data generated at a plurality of MPR sections having different volume data, and performs interpolation processing on position information of these two-dimensional regions of interest. The image display apparatus according to claim 3, wherein the three-dimensional region of interest is set. The image data is at least one of three-dimensional image data, MPR (Multi Planar Reconstruction) image data, and MIP (Maximum Intensity Projection) image data generated by processing volume data collected by the medical image diagnostic apparatus. The image display apparatus according to claim 1, wherein: Image data selection means for selecting the reference image data from the plurality of reference image data candidates that are extracted from the data storage means by the reference image data extraction means based on the second label information; The image display device according to any one of claims 1 to 5, further comprising: 7. The image data selection unit selects the reference image data from the plurality of reference image data candidates displayed in parallel by the display unit.
The image display device described. The image display apparatus according to claim 1, wherein a plurality of the regions of interest are set for one piece of the image data.

Images