JPS644138Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a functional image display device suitable for displaying functional images.

A radioisotope is injected into the subject, and the process of its accumulation and excretion is captured in a data processing device.
Functional imaging is a method for analyzing the functions of specific parts of a subject, such as organs.

The functional image is created by sending the functional data from the radioisotope accumulation to discharge process to the CRT via the color code converter and D/A converter.
This is displayed on a CRT, but unlike ordinary images, there are positive and negative parts within a single image due to the analysis method.

Despite this, in the past, the data values of image data were simply converted in gradation from maximum to minimum and displayed on a CRT accordingly. For this reason, the negative part of the displayed functional image becomes a light part of the shading part, making the image unclear. Especially when this part is photographed on an imager or photographic film, it is difficult to fully represent the image. I couldn't do it. Another drawback is that it is not possible to know the boundary between the positive part and the negative part in the functional image.

The present invention has been made to eliminate the above-mentioned drawbacks, and is based on a certain value of data values of functional image data.
Small, for example, 0 as the standard, larger, smaller (positive,
It is an object of the present invention to provide a functional image display device that can clearly display images of each part of (negative) and easily know the reference value that is the boundary between them, for example, the 0 part. .

Embodiments of the present invention will be described below with reference to the drawings.

The figure is a block diagram showing an embodiment of the functional image display device according to the present invention. In the figure, numeral 1 denotes an image memory for storing tone-converted functional image data. 2 is a first function for color code conversion of a data group whose data value is greater than a predetermined reference value, in this case greater than 0, that is, a positive value among the functional data stored in this memory 1; A color code converter for displaying image data (hereinafter referred to as a color code converter), 3 is also a second functional image that converts color codes for data groups smaller than the reference value, here smaller than 0, that is, negative values. A color code converter for data display (hereinafter referred to as a second color code converter), 4 is greater than the reference value 0,
A third color code converter for displaying functional image data (hereinafter referred to as a third color code) converts color codes for all functional image data stored in the memory 1 without distinguishing between small (positive, negative) data. converter).

5 is the first to third color code converter 2 to 4;
Select one of the output signals of the D/A
This is a display changeover switch for inputting to the converter 6.
In this case, the D/A converter 6 performs D/A conversion of the input signal. A CRT 7 receives the output signal of the D/A converter 6 and displays a functional image according to the signal.

Next, the operation of the above-described device of the present invention will be explained.

First, when functional image data is read from memory 1, the first, second and third
Color code converters 2, 3, and 4 perform color code conversion on functional image data of each positive group, negative group, and both groups (all of them). now,
As shown in the figure, when the display changeover switch 5 is selectively switched to the third color code converter 4 side, the output signal of the third color code converter 4 is passed through the display changeover switch 5 to the D/A converter 6. is input. As a result, the output signal of the third color code converter 4 becomes D/A
It is converted and input to CRT7.
displays a functional image corresponding to all the functional image data stored in the memory 1 in shading. This displayed image is not particularly different from that of the conventional device; therefore, the negative portion of the image is displayed dimly as a whole, and the difference in data values in the negative portion is not clear.

In such a case, the display changeover switch 5 is selectively switched to the second color code converter 3 side. According to this, since the functional image is displayed according to the functional image data group of only the negative part, the difference in shading becomes large and the image becomes clear.

By alternately switching the display changeover switch 5 between the second and third color code converters 3 and 4, the CRT 7 can display only the negative portion of the functional image data group and all of the functional image data. The corresponding functional images are displayed alternately, and the boundaries in the functional images for positive and negative parts can be known. This boundary can be determined by alternately switching the display changeover switch 5 between the first and second color code converters 2 and 3, so that the CRT 7 can display only the positive and negative portions of the functional image data group. Since the functional images are displayed alternately, it becomes possible to understand them more clearly.

In the above embodiment, the predetermined reference value for the data value of the functional data stored in the memory 1 is set to 0, and the functional images for positive and negative data groups are displayed alternately. However, the reference value is selected as appropriate. For example, by selecting the limit value of the range in which a specific part of the subject is considered normal or the average value of the stored data as a reference value, each functional image for data groups larger and smaller than that is selected alternately. It may be configured to be displayed. That is, as the reference value, a useful value is arbitrarily selected according to the functional analysis of the specific part of the subject, the purpose of diagnosis, etc.

As described above, the present invention provides first and second functional display color code conversion for each data group whose data value is larger or smaller than a predetermined reference value among functional image data. and a display changeover switch that selects one of the output signals of the first and second functional image data display color code converters and inputs it to the D/A converter on the CRT input side. By switching the display changeover switch, functional images based on at least the above two data groups can be displayed alternately on the CRT. This has the advantage that both can be clearly displayed and the boundaries between them can be easily recognized.

[Brief explanation of drawings]

The figure is a block diagram showing an embodiment of a functional image display device according to the present invention. 1...Image memory, 2-4...1st-3rd
Functional image data display color code converter, 5...display selection switch, 6...D/A
Converter, 7...CRT.

Claims (1)

[Scope of utility model registration request] The functional image data stored in the image memory during the process of radioisotope accumulation and excretion after administration of the radioisotope to the subject is sent to the CRT via the color code converter and D/A converter. In the apparatus for displaying functional image data, the first and second functional image data displays convert the color codes of data groups whose data values are larger and smaller than a predetermined reference value among the functional image data. a color code converter for displaying functional image data, and a display changeover switch that selects one of the output signals of the first and second color code converters for displaying functional image data and inputs the selected signal to the D/A converter. 1. A functional image display device comprising: a functional image display device, wherein functional images based on at least the two data groups can be alternately displayed on the CRT by switching the display changeover switch.