JPH0695277B2 - Image display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention reconstructs a two-dimensional image of a plurality of slice planes in an object in a three-dimensional space by using data obtained by imaging and displays it on the same screen. The present invention relates to an image display device capable of displaying.

(Prior Art) In a medical image diagnostic apparatus such as CT (Computer Tomography), a two-dimensional image of a large number of adjacent slice planes of a subject is reconstructed using data obtained by imaging, and is displayed on the same screen. It is being displayed and observed. In this case, if the operator can freely obtain a two-dimensional image in the vicinity of the tissue (region) of interest, it becomes possible to easily and accurately carry out the diagnosis and the treatment procedure.

However, conventionally, there has been a problem that the operator cannot freely and abundantly obtain a two-dimensional image near the target tissue.

The present invention has been made in view of the above problems, and an object thereof is to provide an image display device that allows an operator to freely and abundantly obtain a two-dimensional image in the vicinity of a target tissue.

(Means for Solving Problems) In the present invention for solving the above problems, a two-dimensional image of a plurality of slice planes in an object in a three-dimensional space is reconstructed using data obtained by imaging, and the same screen is displayed. In an image display device capable of being displayed on the above, a setting device for designating at least two points, inputting information for setting a virtual straight line in the object, and setting a desired cutting plane including the straight line, It is characterized by further comprising: a cross-section conversion creating device for creating a two-dimensional image of a cross section set by the setting device; and a control device for displaying the two-dimensional image created by the cross-section conversion creating device on a screen. .

(Operation) In the image display device of the present invention, a virtual straight line and a desired cutting plane including this straight line are set in the object by using the setting device. As a result, a two-dimensional image of an arbitrary cut surface including a straight line is displayed on the screen. Therefore, the operator can freely and abundantly obtain a two-dimensional image near the target tissue by setting a straight line so as to pass through the target tissue or the vicinity thereof, and it is possible to easily and accurately perform a diagnostic or therapeutic procedure. Can be implemented.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of the essential parts of an embodiment of a medical image diagnostic apparatus according to the present invention. In the figure, reference numeral 1 is an image storage device capable of storing a plurality of captured image data. The apparatus of the present invention may be, for example, part of a CT apparatus, and in that case, the image data provided is two-dimensional image data of each slice plane arranged three-dimensionally. Reference numeral 2 denotes an image reduction device that reduces the image provided from the image storage device 1 to an image of an arbitrary size (reduces to a predetermined size to display a plurality of images on the same display screen). Reference numeral 3 denotes an image synthesizing device for arranging a plurality of reduced images on the same screen. Reference numeral 4 is a display device for displaying the created composite image. Reference numeral 5 is a setting device capable of setting two points at arbitrary positions in arbitrary two images and setting a desired cutting plane including a straight line connecting the set two points. Reference numeral 6 is a set two points. It is a passage position calculation device capable of obtaining a passage point (position) in each image of a straight line connecting between. Reference numeral 7 is a cross-section conversion creation device that creates a two-dimensional image (which can be easily reconstructed by using the data in the image storage device 1) on the set cut surface, and 8 is a control device that appropriately controls each of the above devices. is there. Under the control of the control device 8, the display device 4 can display not only a plurality of images (composite images) but also comments such as appropriate figures and characters.

The operation in such a configuration will be described below with reference to FIG.

(1) When a command for displaying a plurality of images on the same screen is given, the setting device 5 can select an image. As shown in FIG. 2B, a number of slice planes of the three-dimensional object 10
Select 11. The two-dimensional images # 1 to #n of each slice plane are already stored in the image storage device 1.

(2) The selected images are taken one by one into the image reducing device 2 and reduced to a predetermined magnification.

(3) Each time one reduced image is created, the image composition device 3
To save each image, and after finishing all the image reduction processing,
Combine them to arrange them on one screen.

(4) The above composite image is displayed on the same screen on the display device 4 (FIG. 2C).

(5) The setting device 5 sets a straight line passing through a desired position in the subject. The linear position can be set to any 2 within the subject.
It is done by specifying points.

(6) The passing point calculation device 6 calculates the passing point in each image (in the reduced image). The coordinates of the passing point (coordinates on the same screen) are sent to the control device 8.

(7) The control device 8 overwrites the displayed image with the second
As shown in FIG. 3D, the passing points of each image are displayed by, for example, a + mark. The two points surrounded by + in FIG. 2D mean the two points used when designating a straight line.

(8) When the process regarding the passing point is not completed, the process is repeated from (5) above.

By the above procedure, it is possible to obtain a display in which the passing position of the straight line is clarified.

Note that the number of straight lines is not limited to one, and may be multiple. In the case of a plurality of lines, it is preferable that the passing point marks are different marks that can be identified in association with each straight line.

(9) The setting device 5 sets a desired cutting plane including the straight line. The cutting plane is set with reference to the + mark of the image as shown in FIG. The simplest method of setting the cutting plane is to specify one point in addition to the straight line.

(10) When a two-dimensional image is created by the cross-section conversion creating device 7, the data of this two-dimensional image is directly displayed when it is not necessary to reduce the image and display it on the same screen.
When it is necessary to reduce these images and display a plurality of them on the same screen by sending them to the image synthesizing device 3, they are sent to the image synthesizing device 3 via the image storage device 1 and the image reducing device 2.

(11) The display device 4 displays a composite sectional image based on the sectional conversion data.

(12) If the processing relating to the cut surface has not been completed, the processing is repeated from (9) above. When the execution of the processing for all the cut surfaces is completed, the display as shown in FIG. 2 (e) is finally displayed on the screen. Here, the substantially rectangular figure in the upper part of the screen in FIG. 2 (e) shows an object in a three-dimensional space, and the oblique broken line intersecting this shows the set cutting plane. In addition, the two reduced views at the bottom left of the screen show images of two cut surfaces (when two cut surfaces are set).
The vertical solid line in this image indicates the position of the set straight line on the image.

According to the above-mentioned embodiment, when two-dimensional images of a large number of slice planes are displayed and observed on the same screen, the set straight line passing points are displayed on each image, and the mutual positional relationship between the images is determined. You can easily understand what is going on.

In addition, it is important to know the exact location of the affected area (tissue of interest) in the living body, and contact with the affected area has been attempted by various methods as a medical procedure, such as biopsy and drug injection. By using a tube, fiberscope, etc., in this case, by displaying an arbitrary cut surface around a straight line and providing information about the vicinity of the passage point to the tissue of interest, the insertion tube can be accurately guided. .

Further, since the operator can freely and easily set a straight line and an arbitrary cut surface including this straight line a plurality of times, by setting a straight line so as to pass through the target tissue or its vicinity, the target tissue can be set. Two-dimensional images in the vicinity can be freely and abundantly obtained, and an easy and accurate treatment procedure can be established.

The display device in the above embodiment is not limited to the CRT, and a graphic display device such as a color CRT, a liquid crystal display or a plasma display can be used. The present invention also provides
Not only the image display device applied to the medical image diagnostic device,
It is also applicable to an image data processing device having three-dimensional space coordinate information.

(Effects of the Invention) As described above, according to the present invention, an arbitrary straight line including this straight line can be set by setting a virtual straight line and a desired cutting plane including this straight line in the object using the setting device. A two-dimensional image of the cut surface can be easily displayed on the screen.
Therefore, the operator can freely and abundantly obtain a two-dimensional image near the target tissue by setting a straight line so as to pass through the target tissue or the vicinity thereof, and it is possible to easily and accurately perform a diagnostic or therapeutic procedure. Can be implemented.

[Brief description of drawings]

FIG. 1 is a main part configuration diagram of an embodiment of a medical image diagnostic apparatus according to the present invention, and FIG. 2 is an explanatory diagram for explaining an operation. 1 ... Image storage device, 2 ... Image reduction device, 3 ... Image compositing device, 4 ... Display device, 5 ... Setting device, 6 ... Passing position calculation device, 7 ... Cross-section conversion creating device, 8 ... Control device

Claims (1)

[Claims] 1. An image display device capable of reconstructing a two-dimensional image of a plurality of slice planes of an object in a three-dimensional space using data obtained by imaging and displaying the same on the same screen. A setting device for designating a point and inputting information for setting a virtual straight line in the object and setting a desired cutting plane including the straight line, and creating a two-dimensional image of the cutting plane set by the setting device An image display device comprising: a cross-section conversion creating device; and a control device for displaying a two-dimensional image created by the cross-section conversion creating device on a screen.