JPS60182934A - Display apparatus of calculator tomography apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image display device for a computer tomography apparatus that utilizes X-rays, nuclear magnetic resonance phenomena, and the like. In particular, the present invention relates to an image display device for a computer tomography device that can display both transmission images and tomographic images.

[Description of prior art]

For example, in the case of an X-ray machine tomography device, 10 to 20 tomographic images are produced per patient.
The images are taken at positions moved at regular intervals in the body axis direction, and the conventional method for selecting a desired position from among these tomographic images is to (11) sequentially load the images onto a CRT,
A method of selecting a desired tomographic image by observing scanning position information or an image displayed numerically on a screen; and (2) a first method.
As shown in the figure, there is a method of determining the slice number of a desired tomographic image based on a transmitted image 11 to which a slice line lO indicating the tomographic scanning position is attached.

The above method (1) has the disadvantage that it takes a long time to select a desired tomographic image, and the positional relationship between the tomographic image and the transmitted image is not clear. In addition, in the method (2) above, the tomographic images are called sequentially until the desired slice number is reached, or
Alternatively, it is necessary to input the slice number based on the patient list, which has the drawback of increasing the time required for selection.

[Purpose of the invention]

The present invention eliminates the above-mentioned drawbacks, and aims to provide a display device for a computer tomography apparatus that allows easy selection of a tomographic image at a desired position while displaying a transmission image.

(Summary of the Invention) The present invention provides a display device that displays a tomographic image and a transmission image of a subject observed with a computer tomography device on one screen on a CRT display screen. The present invention is characterized by comprising means for specifying a slice position of a desired tomographic image by an operation on the top thereof, and means for displaying a tomographic image corresponding to the position specified by the means as the tomographic image.

[Explanation based on examples]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A device according to an embodiment of the present invention will be described below with reference to the drawings. Third
The figure is a block configuration diagram showing the configuration of the apparatus of this embodiment.

First, the configuration of this embodiment device will be explained based on FIG. 3. This embodiment device is composed of a cursor positioning mechanism 1, a cursor control circuit 2, a processing device 3, an image file storage device 4, an image display control circuit 5, a CRT 6, and a function key 7. The output of the mechanism 1 is connected to the input of a cursor control circuit 2, and the output of the cursor control circuit 2 is connected to a first input of the processing device 3.

Further, each of the input and output of the image file storage device 4 is connected to a second output and a second input of the processing device 3, respectively, and the output of the function device 7 is connected to a third input of the processing device 3. be done. A first output of the processing device 3 is connected to an input of an image display control circuit 5, and an output of the image display control circuit 5 is connected to an input of a CRT 6.

Next, the operation of this embodiment device will be explained based on the drawings.

In this explanation, FIG. 2 is used in addition to FIG. 3.

FIG. 2 shows images displayed in the main image area 23 and sub-image area 264 on the display screen of the CRT 6. In this figure, reference numeral 20 indicates a transmitted image, reference numeral 21 indicates a cursor, and reference numeral 2
2 indicates a line segment indicating a tomographic slice position (hereinafter referred to as a slice position indication line).

Transmission image 2 displayed on the CRT screen as shown in Figure 2
The cursor 21 is moved onto a plurality of slice position indication lines that cross 0 using the cursor positioning mechanism 1. Next, when a designated key among the function keys 7 is operated, the position of the cursor 21 on the screen (hereinafter referred to as cursor position information) is read by the cursor control circuit 2. In the processing device 3, the actual position of the tomographic image of the patient's body is calculated based on the cursor position information received as a pixel address on the screen, and the Wi layer image data corresponding to the tomographic slice position closest to the calculated position is calculated. It is input from the image file storage device 4. This tomographic image data is transferred to an image memory built into the image display control circuit 5. This image memory is configured so that the transferred tomographic image data can be written therein without affecting the memory contents of the transmission image data. By outputting image data from the image display control circuit 5, a transmitted image 20 is displayed in the main image area, and a desired tomographic image 25 is displayed in the sub image area 26, as shown in FIG. If the cursor 1 is moved onto the slice position indication line 22 by a similar operation, a tomographic image at a new tomographic slice position is displayed instead. Next, the selected desired tomographic image data is pressed using the function key 7.
By this operation, the image is transferred from the processing device 3 to the main image area 23 and can be displayed in the main image area 23.

Here, image reduction processing associated with display in the sub-image area is performed by the processing device IO. Furthermore, the window level of the image in the main image area can be freely adjusted by operating designated function keys. Although the window level of the image in the sub-image area can also be adjusted, normally fixed window level processing is performed by the processing device 3.

Since the image display control circuit 5 is a well-known circuit, its explanation will be omitted.

In the above description, the slice position indication lines on the transmission image are specified manually, but there is also a method of displaying the tomographic image while automatically selecting them one after another.

Further, the image display control circuit 5 may perform reduction of the display image in the sub-image area. In this case, if both of the two systems of window level processing circuits built into the image display control circuit 5 can be switched between displaying the main image area and displaying the sub image area, the image will be displayed in the sub image area. When redisplaying a tomographic image that has been stored in the main image area, the above-described retransmission operation of tomographic image data can be omitted.

〔Effect of the invention〕

As explained above, the present invention allows a desired tomographic image to be retrieved in a short time using an intuitive operation method using images without using numerical values, and through a small number of operation steps.
There are nine fruits that improve the efficiency of medical diagnosis.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a transmission image showing the tomographic scanning position. FIG. 2 is a schematic diagram showing images on a main image area and a sub-image area. FIG. 3 is a block configuration diagram showing the configuration of the embodiment device. DESCRIPTION OF SYMBOLS 1... Cursor positioning mechanism, 2... Cursor control circuit, 3... Processing circuit, 4... Image file storage device, 5... Image display control circuit, 6... CRT, 7...
··function key. Naotaka Ide, patent attorney and agent for patent applicant Yokogawa Medical Systems Co., Ltd.

Claims (1)

[Claims] +1) In a display device that displays a tomographic image and a transmission image of a subject observed by a computer tomography device on one screen on a CR'I' display screen, the transmission image displayed on the screen A computer characterized by comprising means for specifying a slice position of a desired cross-section Ji image on the image by an operation, and means for displaying a tomographic image corresponding to the position specified by the means as the tomographic image. Display device of tomography device.