JPS6131125A - Medical image display 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 (a) Industrial Application Field C (7) The invention is for displaying images obtained by an X-ray CT device, NMR-CT device, ultrasound diagnostic device, nuclear medicine imaging device, etc. This invention relates to improvements in medical image display devices.

(b) Conventional technology X1iCT device, NMR-CT device, ultrasonic diagnostic device,
When trying to display an image obtained with a nuclear medicine imaging device or the like on a CRT, even with conventional medical image display devices, it is difficult to determine which of the values of each pixel of the image should be the median value on the display (Mean value). Show how wide the value is @ (Wind
ow width). In other words, even in the past, for example, when displaying the value of each pixel as a gray level, a specific arbitrary value is taken as the median value of the gray level, and the display width from black to white corresponds to the width of the pixel value. It is now possible to adjust whether the

However, in conventional medical image display devices, these M
You can adjust ean and indow, but this adjustment is 1
It is applied to the entire screen,
Therefore, inconveniences occur during so-called multi-frame display. In other words, multi-frame display divides one screen into multiple areas and displays a different image in each divided area, but it is not possible to set appropriate Mean and Window settings for each image. , Therefore, in particular, X-ray CT equipment, NMR-CT equipment,
This is very inconvenient when trying to simultaneously display images with different properties on one screen in a multi-frame format, which are obtained by ultrasound diagnostic equipment, nuclear medicine imaging equipment, and the like.

(C) Purpose This invention independently calculates Mean,
An object of the present invention is to provide a medical image display device that is improved so that the window can be adjusted.

(d) Configuration The medical image display device according to the present invention includes a plurality of NeaII-wildOw calculation circuits to which a Mean setting device and a Window setting device are respectively connected, and the image data of 1 frame to be displayed on one screen is Each time a pixel is input, attribute data indicating which of the regions into which one screen falls is obtained is obtained, and the plurality of arithmetic circuits described above are selected according to this attribute data. The data of the pixel is operated by the selected arithmetic circuit.

(e) Embodiment As shown in FIG. 1, a medical image display device according to an embodiment of the present invention has four mean-a-window calculation circuits 1 to 4, each of which has a volume, etc. Mean setting devices 1a to 4a, Window
Setting devices ib to 4b are connected. These Mean
*The Window calculation circuit can be set to Mean and Wi using the setting device.
When ndow is set, the original data of each pixel is calculated based on the set value, and Mean and Win are calculated.
The data is converted so that the display can be performed according to the settings. Data of each pixel is sent from the display memory 5 to these arithmetic circuits 1 to 4 pixel by pixel. The data of a certain pixel is stored in the display memory 5.
It is the arithmetic circuit selection memory e that determines which arithmetic circuit will perform the arithmetic operation on the data.
and a selection decoder 7 that decodes its output. The data after the calculation is converted into a video signal via a video conversion circuit 8, and sent to a CRT display device 9 for display.

10 represents data sent from a main computer such as an X-ray tube CT device, and is composed of, for example, image data with a bit depth of 16 bits and attribute data with a bit depth of 2 bits in a 1024 x 1024 display matrix. 0 image data is transferred to the display memory 5, and attribute data is transferred to the arithmetic circuit selection memory 6.

As shown in Fig. 2, one screen is divided into four, and each divided area I has a display matrix of, for example, 512 x 512.
When attempting to perform a so-called multi-frame display in which an independent image is displayed in each of ~■, 2-bit data indicating which of the areas I~■ the pixel falls into is used for each pixel data. (For example, 00, Ol, etc.) is attached as attribute data. In this case, 00 indicates the area of I and the arithmetic circuit 1 is selected, Ol is the area of 11 and the arithmetic circuit 2 is selected, and 10 indicates the area of ■ and the arithmetic circuit 3 is selected.
is selected, and 11 is the area of ■, and the arithmetic circuit ■ is selected. In other words, when an address of the display memory 5 is specified and data of one pixel is read out, attribute data of that address is also read out in the arithmetic circuit selection memory 6 in synchronization with the address, and the operation specified by the attribute data is performed. A circuit is selected, and the calculation circuit performs Mean and Window calculations on the data of one pixel according to the set value.

Therefore, the setting device 1 is set for each of the four divided areas I to ■.
A to 4a and 1b to 4b independently measure Mea for each region.
By arbitrarily setting n and Window, it is possible to adjust the Mean and Window that are considered to be optimal for each image displayed in each of areas (2) to (2).

Note that instead of using such a multi-frame method, one image is independently divided into Mean and Win for each of its multiple regions of interest.
It is also possible to adjust and display the dow.

That is, on the main computer side, a plurality of areas (-) are set in one image as shown in FIG. 3 using an appropriate area input device. This area ~■ is basically the area where the arithmetic circuits 1~4 operate, so as shown in Figure 3, each area does not need to be one, and the area II may be two, or the area m. There may be two regions, and attribute data is added to each region defined in this way, so even if it is a single image, the Mean can be calculated independently for each of multiple regions of interest.
and windows can be adjusted.

(f) Effects According to the medical image display device of the present invention, Mean, W, etc. are independently determined for each of a plurality of defined areas in one screen.
The window can be adjusted, and the optimal Mean and Wi
It is very useful for diagnosing actual patients because it is possible to adjust the ndow and independently adjust the Mean and Window to optimize them for multiple regions of interest within a single image. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIGS. 2 and 3 are diagrams showing examples of screen division. 1 to 4 ・-Mean * Window operation circuit 1
a ~ 4 a ... Mean measuring device 1 b ~ 4 b
”-Windowf;L regulator 5...Display memory 6...Arithmetic circuit selection memory 7...Selection decoder 8...Video conversion circuit 9...CRT display device lO...Data

Claims (1)

[Claims] (1) A first setting means for setting which value of each pixel is set as the median value on the display, and a second setting means for setting how much width of each pixel value is set as the display width. and a calculation means for calculating the original data of each pixel based on the values set by these and obtaining data converted so as to display as set above, Every time one frame of image data to be displayed on one screen is input pixel by pixel, attribute data indicating which of the regions that one screen falls into is obtained, and this attribute data is A medical image display device characterized in that the plural systems of calculation means are selected in accordance with the above, and the data of the pixel is calculated by the selected calculation means.