JPH04132542A - Image display device - Google Patents

Abstract

PURPOSE:To achieve a higher diagnosing effect of comparison diagnosis by arranging an image memory means to store an image data in correspondence to imaging conditions and a display control means to read and display image data the same in the imaging conditions from the image memory means. CONSTITUTION:Image memories 11 and 21 has a plurality of frames to store image data before and after a diagnosis. An AND gate 34 of a selection means 30 outputs a contrast agent mixing indication signals S1 and S2 to a select controller 40 according to the results of comparison between an pixel cumulative value determined with an accumulation circuit 31 and a comparison value held in a register 32 as performed with a comparator. A CPU 49 writes frame number information corresponding to the timing of mixing a contract agent into a register 41 for a display system based on the signals S1 and S2 and writes the frame number information into a register 43 for a display system. A selector 48 for the controller switches a set number register 46 each time a switch at an input section 16 is depressed to output select signals Se1 and Se2 to selectors 12 and 22 of the display systems 10 and 20. The selectors 12 and 22 read out image data at a corresponding frame number from the image memories 11 and 21 to be outputted to display controllers 15 and 25.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an image display device capable of reading out and simultaneously displaying related images among a plurality of obtained images.

(Prior Art) Conventionally, an image display device equipped with two TV monitors is used to perform a comparative diagnosis in which images of the same cardiac phase before and after treatment are displayed simultaneously, for example, in diagnosis regarding the heart, cardiovascular, etc. Specifically, a pre-treatment image is displayed on one TV monitor by an operator's operation, and a post-treatment image with the same center phase as that image is searched for and displayed on the other TV monitor.
Comparative diagnosis was performed by displaying it on a monitor.

On the other hand, in cardiovascular imaging, contrast imaging is performed in which a contrast medium is injected into a blood vessel to obtain a clear blood vessel image. Even if a contrast agent is injected into a blood vessel, it immediately flows out of the imaging area. Therefore, in order to obtain video data in which a contrast agent has been injected, images must be taken continuously before the contrast agent is injected to capture multiple consecutive image data. Is it necessary to select only the video data that has been selected? A technique for automatically performing this selection is disclosed in Japanese Patent Application Laid-Open No. 64-58243.

(Problems to be Solved by the Invention) As described above, in the conventional apparatus, images to be compared are selected by manual operation and visual judgment by the operator. For this reason, there was a problem that the diagnostic efficiency of comparative diagnosis was poor.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an image display device that improves the diagnostic efficiency of comparative diagnosis.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention combines related images among a plurality of images obtained by photographing the same part of the same subject at different times. In an image display device capable of simultaneous display, an image storage means stores image data obtained by photographing in association with photographing conditions, and image data under the same photographing conditions except for the photographing time is stored from the image storage means. The invention is characterized in that it has a display control means for reading out and displaying the information simultaneously.

(for production) The operation of the device having the above configuration will be explained.

The imaging conditions include, for example, whether or not a contrast medium is used in addition to the imaging time. The timing of imaging includes, for example, before and after treatment. In the case of this example of imaging conditions, the display control means simultaneously displays pre-treatment and post-treatment images taken using a contrast agent.

Alternatively, pre-treatment and post-treatment images taken without using a contrast agent are displayed simultaneously. This saves the effort of selecting images to be paired.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a schematic configuration diagram of an image display device 1 according to an embodiment of the present invention.

This device 1 has two first display systems 10. a second display system 20; a selection means 30 for selecting image data before contrast agent mixing from a plurality of captured image data; and an image display system 10.
．． Select controller 40 that controls 20 image selections
It has

The first display system 10 and the second display system 20 are configured in the same way, and the plurality of types (this gA
A first image memory 11 that stores two types of image data, respectively. a second image memory 21; and a first selector 12.21 connected to each image memory 11.21 for selecting image data. Second selector 22 and ECG (electrocardiogram)
A first ECG memory 13 for storing waveform data. A second ECG memory 23 and a first TV monitor 14 for displaying images and the like. Second TV monitor 24 and this TV monitor 14
．． A display controller 15.25 performs display control of 24, and a display operation signal Sd based on an operator's operation. It is equipped with an input section 16 and the like capable of outputting signals such as a nine-image sequential display signal.

The image memory 11.21 stores a plurality of frames (#1-1 to #1-n) and (#2-1 to #2), respectively.
-n). Each frame (#1-1 to #1-n) of the first image memory 11 and each frame (#2-1 to #2-n) of the second image memory 21 includes:
Image data at different times for comparative diagnosis, for example, before and after treatment, are stored.

FIG. 2 shows a schematic diagram of the selection means 30.

The selection means 30 is based on the Japanese Patent Application Laid-Open No. 6
The configuration is similar to that disclosed in Japanese Patent No. 4-58243, and a contrast agent-containing frame is selected based on the change in pixel cumulative value for each frame. This selection means 30 is determined by the relationship between a one-frame accumulation circuit 31 which takes in image data from the storage memory 11.21 and calculates the pixel accumulation value for each frame, and the pixel accumulation value of one frame before the contrast agent is mixed. A comparison value register 32 that holds the comparison value, and a one-frame accumulation circuit 31 that stores the value held in the comparison value register 32 and one frame accumulation circuit 31.
and an AND gate (
(AND circuit) 34. The AND gate 34 outputs a contrast agent mixing presence/absence signal 81 . 82 is output to the select controller 40. That is, when image data is captured when a contrast agent enters the imaging region and is captured into the one-frame accumulation circuit 31, the AND gate 34 outputs a high-level contrast agent presence signal S1; otherwise, it outputs a low-level contrast agent presence signal S1. A contrast medium no signal S2 is output.

FIG. 3 shows a schematic configuration diagram of the select controller 40. As shown in FIG.

The select controller 40 includes a first display system register 41. Between the second display system register 42, the first display system register 43 which stores the frame number information corresponding to the contrast agent outflow point, the second display system register 44, and the image display system 10, 20. A set number creation circuit 45 that creates a set number of frame numbers in which concentric phase image data is stored, a plurality of set number registers 46 that store set number information, and a display operation signal S. a counter 47 that counts the number of arrivals of the select signal SSl+8;
52, and a CPU 49 that controls each part of the controller 40.

FIG. 4 is a diagram related to the first display system 10, and FIG. 5 is a diagram related to the second display system 20, each of which shows the frame number of the image memory 11, 21, ECG waveform, and contrast agent mixing state. It is a diagram showing the correspondence relationship between the signal S and S2 shown in FIG.

Here, the select controller 40 will be described in detail using, as an example, a case where test images before and after cardiovascular treatment and without a contrast agent signal are targeted for comparative diagnosis.

As each test image data, for example, continuous moving image data before and after treatment of 150 frames at a rate of 30 frames per second for 5 seconds, respectively, are divided into frames (#1-1 to #1).
-150) and frames (#2-1 to #2-150).

However, as shown in FIGS. 4 and 5, the phases of the ECG waveforms are generally different, and even if the image data has the same frame number, the memories 11 and 21 contain data with different cardiac phases. Suppose it is remembered.

The CPU 49 of the selection controller 40 selects the fourth
As shown in the figure, frame (#1-10 to 3l-12
0) is contaminated with contrast agent (vessels are extracted)
frame number information (#1-10) corresponding to the time when the contrast agent is mixed is written into the first display system register 41, and frame number information (#1-120) corresponding to the time when the contrast agent is outflowed. ) as the first display system register 4
3. In addition, this CPU 49
The same process is performed for the second display system 20 shown in the figure.

The set number generation circuit 45 is based on the frame number information of the ECG waveform, for example, the R wave (the peak time of the ECG waveform within one heartbeat) and the time point at which the contrast agent is mixed in or out, which is given from the registers 41 to 43. , to create a set number. The created set number is stored in the set number register 46 under the control of the CPU 49.

The configuration of the set number generation circuit 45 will be described in further detail using FIGS. 4 and 5 as examples. The set number generation circuit 45 generates frame numbers (#1-50), (#2-20) corresponding to the R wave in the contrast medium mixed state (while blood vessels are being extracted).
), a set of frame numbers for storing image data of the same central phase is created. At first (memory 11.21)
= Create a set of (#1-50.82-20). After that, in order until the next R wave (#1-51.12-21).

(#1-52.82-22), . . . For example, the set number creation circuit 45
If there is no frame number corresponding to one R wave and the other R wave that should form a set, the set number creation ends. For example, as shown in FIG. 5, the frame number (#2-65) in the memory 21 corresponds to the next R wave;
5) in the memory 11 corresponding to the frame number (for example #1
-95) is not an R wave yet, so at this point we finish creating the group number. When group numbers are created in this way, as shown in Figures 4 and 5, (#1
-50. #2-20), (#1-51. #2-21
), ..., (#1-94.#2-64), creating a total of 45 sets. A total of 45 sets are stored in each set number register 46.

As an example of creating another set number, the frame number (#1
-50) to the frame number corresponding to the next R wave (#1-
99), and the other side's memory 21 for the frame numbers (#1-95 to #1-99) in the memory 11 is set to frame numbers (#2-64). ) may be drawn. That is (#1-50. #2-20).

(#1-51.#2-21),...(#1-94゜#
2-64), (#1-95. #2-64).

(#1-96.#2-64), (#1-97゜#2
-64), (#1-98.#2-64).

50 pairs are created as shown in (#1-99.#2-64). This is based on the clinical fact that there is almost no movement of the subject in the portion of the ECG waveform immediately before the R wave.

The controller selector 48 counts up the counter 47 every time the image sequential display switch of the input unit 16 is pressed by the operator, switches the set number register 46 to select the set, and outputs the select signal S, 8
．． 2 to the selectors 12 and 22 of each display system 10°20. - When the street set number register 46 is selected, it returns to the beginning and is selected again.

The selector 12.22 of each display system 10.20, based on the sent selection signal S Sir 832,
Image data of corresponding frame numbers are read from the image memories 11.21 and output to the respective display controllers 15.25.

Next, the operation of the above embodiment device 1 will be explained.

Memory 11.21 stores image data that has been captured continuously from the time when the contrast agent has not yet entered the blood vessels in the imaging region, to when the contrast agent has entered the blood vessels in the imaging region, and even after the contrast agent has flowed out. be taken in.

The selection means 30 receives a selection operation signal S. Based on this, images containing a contrast agent are searched from the continuously captured image data, and a contrast agent presence signal S1+a contrast agent absence signal S2 is output to the select controller 40. The CPU 49 of the select controller 40 controls the ECG memory 13.
Based on the ECG waveform information outputted from 23 and the signal Sl outputted from the selection means 30, the frame number information (#1-10) (mixed in) and (#1-120) (outflowed) are respectively The data is written to the display system 10 registers 41 and 43 of the display system 10. Similarly, the CPU 4 of the select controller 40
9 is frame number information (#2-6) (mixed), (
#2-125) Write C outflow) to the registers 42 and 44 for the second display system 20.

The set number creation circuit 45 generates a set number in the memory 11.21 based on the ECG waveform information outputted from the ECG memory 13.23 and the frame number information written in the registers 41 to 44.
A set number is created by selecting a frame number of the same cardiac phase from the image data stored in the image data.

The set numbers created by the set number creation circuit 45 are stored in each set number register 46.

When the operator presses the switch for displaying images sequentially, the frame set number information stored in the set number register 46 is selected by the selector 48 each time the switch is pressed, and is sent to the display system selector 12.13 as a selection signal SS1+ 85□. Output. The display system selectors 12.13 select the image memory 11.1 based on this selection signal SSl+ss□.
21, each image data before and after the treatment of the same cardiac phase is simultaneously read out as one set. This read set of image data is simultaneously displayed on the display section 14.24 under the control of each display controller 15.25.

According to the above embodiment device 1, when a person who observes images, such as a doctor, compares and diagnoses two images, it is possible to view images of the same phase with one operation. The present invention is not limited to the above, and various modifications can be made without changing the gist thereof. For example, the different periods targeted for comparative diagnosis were explained before and after treatment, but the early period after treatment (
e.g. several days later) and later after treatment (e.g. several tens of eight days later)
You can also compare. Alternatively, instead of storing the group number in the group number register in advance, the group number may be configured and output to the select controller each time there is a display operation signal. Alternatively, the state of the contrast agent may be ignored, and the periods from before the contrast agent is mixed in to after it flows out may be displayed in the same central phase using a similar method.

[Effects of the Invention] According to the present invention described in detail above, it is possible to provide an image display device that improves the diagnostic efficiency of comparative diagnosis.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a device according to an embodiment of the present invention, FIG. 2 is a schematic diagram of a selection means of this device, FIG. 3 is a schematic diagram of a select controller of this device, and FIGS. The figure shows the operation of this device. 1... Image display device, 11.21... Image memory,
14.24...TV monitor, 15.25...Display controller.

Claims (1)

[Claims] In an image display device capable of simultaneously displaying related images among a plurality of images obtained by imaging the same part of the same subject at different times, the image data obtained by the imaging is associated with imaging conditions. An image display device comprising: an image storage means for storing image data; and a display control means for reading image data having the same photographing conditions except for the photographing time from the image storage means and displaying the same at the same time.