JPS62194581A - Medical picture analysis processor - Google Patents

Abstract

PURPOSE:To obtain a device which makes observation and analysis processing easy without converting picture data values, by adding selection designating data corresponding to plural display gradation conversion table memories to a picture storage memory. CONSTITUTION:A console panel 10 is provided with a display window changed operator 10A which changes the display window of pictures and an interesting are a ROI setter 10B like a track ball or a joystick which operates X and Y-direction positions for description of ROI on the picture, and operation states of them are read by a CPU 11. The CPU 11 sets picture data to a picture storage memory 12 and performs the analysis processing of this picture data. Conversion table data is set to a display gradation conversion table memory 13 in accordance with the operation of said operator 10A. Contents of the memory 12 consist of picture data bits D1-Dn and bits T1-Tn which select respective tables of the memory 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an image display window circuit in a medical image analysis processing device.

Conventional medical image analysis processing device 1 For example, in an image analysis processing device for an X-ray CT device, the obtained digital image data is a data portion of the entire image data that is necessary for diagnosis, as shown in FIG. The image is converted to a black and white display gradation and displayed on a cathode ray tube (CRT) monitor. In Figure 1, C
T is image data (CT value), DCL is data of 1 display gradation level, WD is white data, BD is black data, DW
W is the display window width, WL is display gradation white level data, and BL is display gradation white level data.

FIG. 2 is a block diagram showing the configuration of the display section of this image analysis processing device. In FIG. 2, 1 is an image storage memory, 2 is a display gradation conversion table memory, 3 is a digital/analog converter, 4 is a CRT monitor, and 5 is a computer (hereinafter referred to as CPU). The address lines of the display gradation conversion table memory 2 correspond to image data lines, and the memory contents of each address can be set by the CPU 5 or the like as data after display gradation conversion. This data setting is shown in Figures 3 (A) and (B).
) (Y-axis is display gradation level data DCL, X-axis is image data CT, DW, and DW1.DW2 are display windows), so the image data from image storage memory 1 is set as follows: The data is passed through the gradation conversion table memory 2 to be converted into black and white display gradation level data DCL, and further converted to an analog signal by the digital-to-analog converter 3 and displayed on the CRT monitor 4.

In the configuration of such a conventional display unit, the structure shown in FIG.
As shown in A), if you want to see the entire image in one display window DW, but you want to see the details of one image data, there is a drawback that the data of the entire image cannot be seen because the window width DWW is narrowed. Ta.

In addition, when observing parts with different image data levels at the same time, there is a method of displaying two display windows DW and DW, as shown in Figure 3 (B). Data may have the same display gradation, and if the entire image is displayed using this method, the image will be difficult to view. In addition, as shown in FIG. 4, for example, a plurality of different types of images (images with different display windows that are easy to display) such as a scanograph image A and an xmcT tomographic image B are displayed on one CRT monitor 4. If so, one image is aP! +,, when you fit it into an easy viewing window, the other image is Il! It becomes difficult to understand. To make this easier to view, it is necessary to calculate and convert the image data using a computer (CPU) or the like. However, since there is a large amount of image data, it takes time to convert, making it impossible to respond quickly to display window changing operations.

Furthermore, converting the image data in this manner has the disadvantage that analysis processing using the image data becomes difficult.

SUMMARY OF THE INVENTION An object of the present invention is to provide a medical image analysis processing device that eliminates the above drawbacks and facilitates the observation and analysis of medical images.

A feature of the present invention is that a plurality of display gradation conversion table memories are provided, and selection designation data corresponding to the plurality of display gradation conversion table memories is added to the image storage memory.
The present invention is provided with means for displaying an image in an independent display window for a predetermined portion of one image by setting selection designation data in the display gradation conversion table memory without converting image data values.

Hereinafter, the present invention will be described in detail along with examples.

FIG. 5 is a block diagram showing the configuration of an embodiment of the present invention. In FIG. 5, the operation console 10 includes a display window change operation device 10A for changing the image display window, and a display window change operation device 10A for controlling the position in the X and Y directions for drawing a region of interest (hereinafter referred to as ROI) on the image. An ROI setting device 10B such as a trackball or a joystick is provided, and the operating status of these devices can be read by the CPU 1. CPU 1 is image storage memory 1
2, the image data is analyzed, and conversion table data is set in the display gradation conversion table memory 13 in accordance with the operation of the display window change operation device 10A. The contents of the image storage memory 12 include image data bits D1 to Dn, as shown in FIG.
and display gradation conversion table (hereinafter referred to as table) bits T to Tn for selecting each table in the memory 18.

FIG. 7 is a diagram showing a detailed configuration of the table memory 13. As shown in FIG. 7, the table memory 13 includes a plurality of table memories M□9M□.

It consists of M, and each table memory M.

Address lines A1 to A of M, , M, have CPU1
1 address line is connected through the multiplexer MPX, and the data output of the image storage memory 12 is connected to the select terminal C5 through the multiplexer MPX. Conversion table data is sent to multiplexer MPXti
- When switching to the CPU 11 side and setting and displaying an image, switch the multiplexer MPX to the image storage memory 12 side.

Data from the image storage memory 12 is stored in a predetermined table memory M1. One image data in which M, , M, is selected is converted into monochrome display gradation data using the selected table. Also, the table memory M1. The switch s1.M, , inserted into the select line of M,. S.

When switching from the b side to the b side, the table memory M□ is selected regardless of the table data, so that the image data can be displayed in a single display window.

Next, the operation of this embodiment will be explained.

(1) When changing the display window only in R○ construction In Figs. 5 to 7, first, when setting image data in the image storage memory 2, set the table selection data bit of all data to T, = 1. T,=O.

T,=O is set and displayed by CPU II.

Next, using the R○ film setting device 10B, set the table selection data bit of the data on the line indicating the range of ROI to T1=O
,T,=1. Set T,=O by CPUI 1,
A line indicating the ROI range is displayed in white.

Next, the table selection bits for data within the range of the ROI are set to T□=O, T, =O, T, =O by the CPU II and displayed.

By operating the display window change operation device 10A and changing the table in the table memory M3 using the CPU 1, the display window is changed and displayed only within the ROI.

FIG. 8 (A), (B), and (C) are the table memo I.
JM1. FIG. 9 is a diagram showing an example of a table of M,,M, where (A) shows a table of table memory M□, (B) shows table settings of table M2, and (C) shows table settings of table M3. (A), (B), and (C) are table M3
FIG. 4 is a diagram showing an example of a table of ROI
If you want to display only the inside in a narrow window.

(B) shows an example of table setting when displaying the distribution of data before and after specific data in the ROI. In addition to the above operations, switch S operation is also performed.

S2. By alternately switching S3 to the a side and the b side, the display within the ROI can be flash-displayed.

(2) When multiple images of different types are displayed in independent windows on one screen.

For example, as shown in FIG.
When displaying two images of the line CT tomographic image B on one screen, set the table selection bit to T1=1 when setting the scanographic image A to the image storage memory 12 by the CPU 1l.
, T, = O, T3 = O, and when setting the primary CT tomographic image in the image storage memory 12 by CPU 1, the table selection bits are set as T1 = O, T, = 1, T3.
= Primary set to O.

Display gradation conversion data that are easy to observe are set in the table memories M and M2 by the CPU 1 using the display window change operation device 10A.

FIGS. 10(A) and 10(B) are diagrams showing an example of the table settings of table memories M1 and M2 in this case, and (A) is a table of table memory maintenance, that is, implementation of the scanograph recruitment window. For example, (B) is table 2 of table memory M2, that is, X! An example of an icT tomographic image window is shown.

It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without changing the gist thereof.

As described above, according to the present invention, it is possible to independently and quickly set a display window for a predetermined portion of an image display, thereby facilitating image vA estimation. Furthermore, since one image data is not converted, analysis processing of display image data can be easily performed.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a display window of a conventional image analysis processing device. FIG. 2 is a block diagram showing the configuration of a display unit of a conventional image analysis processing device. 3(A), (B), and 4 are diagrams for explaining the problems of the display window of the conventional image analysis processing device. FIG. 5 is a block diagram of the configuration of an embodiment of the present invention. The figure shown in 6 is a diagram showing an example of the contents of the image storage memory in FIG. 5, FIG. 7 is a diagram showing a detailed configuration of the table memory in FIG. 5, and FIGS. ), (C) to FIG. 10 are diagrams for explaining the operation of this embodiment. In the figure, 10...operation console, 11...CPU, 12...
・Image storage memory, 13...Table memory, 14・
...Digital-to-analog converter, 15...CRT monitor.

Claims (1)

[Claims] (1) A medical image analysis processing device that analyzes and displays medical images includes a plurality of display gradation conversion table memories and an image storage memory to which selection designation data corresponding to these display gradation conversion table memories are added. and means for displaying an image in an independent display window for a predetermined portion of the image by setting selection designation data in the display gradation conversion table memory.