JPH0496739A - Image display device - Google Patents

Abstract

PURPOSE:To improve display performance by installing a display control means which carries out an animated display, carrying out the magnification display for the image data corresponding to the region in ROI set by a ROI setting means. CONSTITUTION:When the magnified moving picture display mode and magnification factor are selected by a selecting key 5, a transfer part 4 successively transfers the image data D1-Dn memorized in an image memory part 2 into a display buffer 3, and when transfer is completed, the transfer operation is carried out in the reverse direction from the data Dn. Then, the display buffer 3 transfers the image data D1-Dn in succession to a display control part 9, and the image which is not magnified is animately displayed on a display part 8. When a ROI 12 is set at a position where the magnified moving picture display by a track ball is desired, a ROI setting part 6 sends the position information into the an image magnifying part 7, and then the display buffer 3 transfers the image data D1-Dn to the image magnification part 7, and carries out the magnification calculation at a high speed with the magnification factor which is selected for the corresponding image data on the basis of the position information of the ROI, and then transfers the image data into the display control part 9, and the magnified image is animately displayed on the display part 8. Accordingly, the display performance is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an image display device having functions of enlarging an image and displaying a moving image.

(Prior Art) Conventionally, as shown in FIG. 5, a plurality of image data D have been collected by photographing the same tomographic plane over time (to to tn) using an X-ray CT scanner or the like. There are known image display devices that can display moving images by taking in .Dn to Dn.

In recent years, with the advent of high-speed continuous X-ray CT scanners that can collect precise single image data in a short time of around 1 second,
The image data collected by this scanner is captured to display precise moving images.

This video display is image data D obtained by, for example, injecting a contrast medium into a blood vessel and continuously scanning the tomographic plane after the contrast medium injection. This is done by periodically displaying Dn to Dn. In addition, instead of displaying a video, a ROI is set for details in the image as shown in Figure 6, and time-lapse data Dt of CT values within this ROI are determined and displayed as shown in Figure 7. ing.

On the other hand, conventionally, image display devices have been known that can enlarge or reduce an ROI (region of interest) set at an arbitrary position of an image displayed on a display screen at an arbitrary magnification.

(Problem to be solved by the invention) However, with the advent of high-speed continuous X-ray scanners, it has become possible to obtain precise image data. There has been a desire for an image display device that can display a moving image while enlarging the details of the image.

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 with improved display performance.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above object, the present invention is capable of capturing a plurality of image data collected over time and displaying the image in an enlarged manner or as a moving image. In the image display device, an ROI setting means is provided that can set an ROI at an arbitrary position in the image based on a movement operation, and the image data corresponding to the region within the ROI set by the ROI setting means is enlarged and displayed. The present invention is characterized by having a display control means for displaying a moving image.

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

The display control means is configured to display the ROI set by the ROI setting means.
A moving image is displayed while enlarging and displaying the image data corresponding to the area within I. This can improve display performance.

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

FIG. 1 shows a schematic diagram of an apparatus 1 according to an embodiment of the present invention.

The apparatus 1 includes a plurality of storage memories 2a having a storage area of, for example, a 512×512 matrix, and includes an image storage section 2 that stores a plurality of image data collected over time in the plurality of storage memories 2a, and an image storage section. a display buffer 3 having the same storage area as the storage memory 2a of No. 2; a transfer section 4 that transfers image data from the image storage section 2 to the display buffer 3 so as to display a moving image; and a moving image display mode;
It is equipped with a selection key 5 for selecting each mode such as an enlarged display mode and an enlarged video display mode, and for selecting an image enlargement ratio, and a trackball etc. for setting the ROI when performing an enlarged display or an enlarged video display. an ROI setting section 6, an image enlarging section 7 that performs an enlarging operation on image data corresponding to an area within the set ROI when an enlarged display mode or an enlarged video display mode is selected, and a display such as a CRT display. a display control section 9 that performs display control on the section 8;
The device 1 has a CPU 10 that controls each part of the device 1.

When any mode such as video display mode, enlarged display mode, or enlarged video display mode is selected by operating the selection key 5, the CPU 10 controls each part of the device 1 based on this mode selection information. Displays a moving image, an enlarged display, an enlarged moving image, etc. CPU
When the video display mode is selected, l0 sends a control signal to the display buffer 3, causes the image data to be directly transferred to the display control unit 9 without transmitting it to the image enlarging unit 7, and displays the video on the display unit 8. It is something. Furthermore, when the enlarged display mode is selected, the CPU 10 sends a transfer stop signal to the transfer section 4 and a control signal to the display buffer 3, causing the display buffer 73 to transfer one image data to the image enlargement section 7. The image enlarging section 7 performs image enlarging calculations, and the display section 8 displays an enlarged still image. Furthermore, CP
When the enlarged video display mode is selected by operating the selection key 5, Ul0 sends a control signal to the display buffer 3 to transfer the image data to the image enlarger 7.
The image magnification calculation is performed on the image, and an enlarged moving image is displayed on the display unit 8 as shown in FIGS. 3 and 4.

Note that this CPU 10 also has a function of obtaining time-lapse data of CT values within the set ROI in the same way as explained in the section (Prior Art), and this obtained CT value time-course data is It is designed to be displayed on the display section 8.

The display buffer 3 transfers the image data transferred from the transfer section 4 to the display control section 9 or the image enlargement section 7 based on a control signal sent from the CPU I O.

2 to 4 are diagrams for explaining the enlargement calculation performed by the image enlargement section 7. FIG. 2 is a conceptual diagram, and FIGS. 3 and 4 are diagrams for explaining the enlargement operation performed by the image enlargement section 7. It is a figure showing a result.

The image enlarging unit 7 converts the 512×512 matrix image data 11 transferred from the display buffer 3 into image data corresponding to the area within the RO 112 set by the ROI setting unit 6 under the control of the CPU I O. about,
The image data 12a in a 512×512 matrix is formed by performing an enlargement calculation at the enlargement rate set by the selection key 5 (4 times in this example). The display control section 9 displays the image 1 shown in FIG. 3 on the display section 8 based on this data 12a.
2a is visually displayed. In addition, the image enlarging unit 7 controls the RO 112 by operating the trackball of the ROI setting unit 6.
As shown in the figure, when moving in the upper right direction A, R
For the inside of O113, enlargement calculation is performed in the same manner as described above, and image data 13 of 512×512 matrix is
It forms a. The display control unit 9 visually displays an image 13a shown in FIG. 4 on the display unit 8 based on this data 13a. The above-mentioned enlargement operation performed by the image enlarging unit 7 does not involve enlarging the entire image data 11 of the 512 x 512 matrix before enlargement as shown in FIG. This makes it possible to instantly display an enlarged moving image in response to the movement of the ROI 12°13. Therefore, as the ROs 112 and 13 move, it appears as if the 512 x 512 matrix display screen of the display section 8 moves on the 1024 x 1024 matrix image data 11a shown in FIG.

Next, the operation of the embodiment device 1 having the above-mentioned configuration will be explained in the case where the enlarged moving image display mode according to the present invention is selected.

When the operator operates the selection key 5 and selects the enlarged video display mode and enlargement rate (4x), the transfer unit 4
0, the image data D1 to Dn stored in the image storage section 2 are sequentially transferred to the display buffer 3. After the transfer unit 4 finishes transferring the image data D0 to data Dn, it then transfers the last data Drx to data D1 in reverse, and continues this operation until a transfer stop signal arrives. Then, the display buffer 3 sequentially transfers the image data D1 to Dn transferred by the transfer section 4 to the display control section 9. The display control unit 9 displays the unenlarged image as a moving image on the display unit 8.

Here, the operator operates the trackball of the ROI setting section 6 while viewing the unenlarged video display displayed on the display section 8, and moves the ROI 112 to the desired position for the enlarged video display.
Set. The ROI setting section 6 sends the position information of the ROI 112 to the image enlarging section 7. Next, display buffer 3 is CP
The image data D0 to Dn are transferred to the image enlarging section 7 under the control of Ul0. The image enlarging unit 7, under the control of the CPU 10, enlarges the ROI based on the sent ROI position information.
Select key 5 for the image data corresponding to the area within 12
An enlargement calculation is performed at high speed using the enlargement ratio selected by the operation of , and the result is transferred to the display control section 9.

The display control section 9 displays the enlarged image on the display section 8 as a moving image. If the operator fixes the position of the RO 112, an enlarged image within the RO 112 will be displayed as a moving image.

During the camp displaying this enlarged video, the operator
When the trackball of the OI setting section 6 is operated to move the position of the RO 112 in the upper right direction A, the image enlargement section 7 performs an image enlargement calculation on the image data corresponding to the area within the RO 113 whose position has been newly changed. This is performed at high speed, and an enlarged moving image is displayed within the ROI 13 that has been moved to a new position in the same manner as described above.

According to the above embodiment device 1, it is possible to instantaneously display an enlarged moving image in response to the movement of the ROI, so it is possible to provide an image display device that can improve the display performance by a lot compared to the conventional device.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be modified in various ways without changing the gist thereof.

[Effects of the Invention] According to the present invention described in detail above, it is possible to provide an image display device with improved display performance because a moving image is displayed while enlarging the display in accordance with the movement of the ROI.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a device according to an embodiment of the present invention, FIGS. 2 to 4 are explanatory diagrams showing the enlarged video display mode of this device, and FIG. 5 is a diagram showing the image stored in the image storage unit of this device. 6 and 7 are diagrams showing temporal image data, and FIGS. 6 and 7 are diagrams showing temporal data of CT values. DESCRIPTION OF SYMBOLS 1... Image display device, 6... ROI setting part, 8...
...Display section, 9...Display control section, 12.13...
ROI, D-Dn... Time-lapse image data. Agent Patent Attorney Noriyoshi Konnoki Takeshi Kondo 5JrllJl-

Claims (1)

[Claims] In an image display device that can capture a plurality of image data collected over time and display the images in enlarged form or as a moving image, an R button can be placed at any position of the image based on a movement operation.
An image display characterized by having a ROI setting means capable of setting an OI, and a display control means for displaying a moving image while enlarging and displaying the image data corresponding to a region within the ROI set by the ROI setting means. Device.