JPH0429385B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] 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.

[Conventional technology]

For example, in the case of an X-ray computer tomography device, 10 to 20 tomographic images are taken for each patient at positions moved at regular intervals along the body axis. Conventional methods for selecting images at a desired location include (1) sequentially loading images onto a CRT and viewing the scanning position information displayed numerically on the screen, or observing the images and selecting the desired tomographic image; (2) As shown in FIG. 1, based on the transmitted image 11 with slice lines 10 indicating the tomographic scanning position,
There is a method of determining the slice number of a desired tomographic image.

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 transmission image is not clear. In addition, with method (2) above, it is necessary to sequentially call up tomographic images until the desired slice number is reached, or to input the slice number based on the patient list, which increases the time required for selection. There were flaws.

By the way, by accurately specifying the tomographic position of the subject,
A technique for displaying a tomographic image at this designated position has been proposed (Japanese Unexamined Patent Publication No. 128994/1983). However, with this technology, even if the desired tomographic position is known, it is not possible to clearly display to the observer which tomographic images taken at positions moved at regular intervals along the body axis direction. Ta.

The present invention solves this problem by providing a display device for a computer tomography device that allows observation by easily specifying which slice position of a plurality of body parts taken of a single patient should be displayed. With the goal.

[Means to solve the problem]

The present invention provides a display means for displaying an observed tomographic image and a transmission image of a subject on one screen on a CRT display screen, and a slice position of a desired tomographic image on the transmission image displayed on the screen. In a display device for a computer tomography apparatus, the display device includes means for specifying by operation, and means for displaying a tomographic image corresponding to the position specified by the means as the tomographic image, wherein the display means displays a plurality of slice positions. The specifying means includes means for specifying one of the plurality of slice positions.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A device according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 3 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 includes a cursor positioning mechanism 1, a cursor control circuit 2, and a processing device 3.
The output of the cursor positioning mechanism 1 is connected to the input of the cursor control circuit 2, and the output of the cursor positioning mechanism 1 is connected to the input of the cursor control circuit 2. The output 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 key 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 the image display control circuit 5.
The output of is connected to the input of CRT6.

Next, the operation of this embodiment device will be explained based on the drawings. In addition to FIG. 3, FIG. 2 will be used in this explanation. FIG. 2 shows images displayed in the main image area 23 and sub-image area 26 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 22 indicates a tomographic slice. A line segment indicating a position (hereinafter referred to as a slice position indicating line) is shown.

As shown in FIG. 2, the cursor 21 is moved using the cursor positioning mechanism 1 onto a plurality of slice position indication lines that cross the transmitted image 20 displayed on the CRT screen. Next, function key 7
When you operate the specified key in , cursor 2
1 on the screen (hereinafter referred to as cursor position information) is read by the cursor control circuit 2.
The processing device 3 calculates the actual position of the tomographic image of the patient's body based on the cursor position information received as a pixel address on the screen, and converts the tomographic image data corresponding to the tomographic slice position closest to the calculated position into the image. It is input from the 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 23, 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 transferred from the processing device 3 to the main image area 23 by operating the function key 7, 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 10. 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 can display one specified tomographic image of a plurality of slice indication lines on the same screen without using numerical values, which is convenient for the observer and It has the effect of improving diagnostic efficiency.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a transmission image showing the tomographic operation 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 device, 4... Image file storage device, 5... Image display control circuit, 6...
CRT, 7...Function key.

Claims (1)

[Claims] 1. The tomographic image and transmission image of the observed object.
a display means for displaying on one screen on a CRT display screen; a means for specifying by operation a slice position of a desired tomographic image on the transmitted image displayed on the screen; In the display device of a computer tomography apparatus, the display means includes means for displaying a plurality of slice positions, and the specifying means includes means for displaying a plurality of slice positions. 1. A display device for a computer tomography device, comprising means for specifying one of the following.