JPH0734220B2 - Image recorder - Google Patents

Description

Description: TECHNICAL FIELD The present invention extracts and stores diagnostic information of an X-ray diagnostic apparatus such as an X-ray television apparatus as digital image information in order to perform image processing such as subtraction processing. The present invention relates to an image recording device, and more particularly to an image recording device with improved storage efficiency.

[Technical background of the invention] For example, a digital fluorography device (hereinafter referred to as a DF device) is known as a device that obtains information by extracting only a changing part of a blood vessel or the like using digital image information from an X-ray diagnostic device. Has been.

This type of DF device digitizes an X-ray image of the observation site before the injected contrast agent arrives as a mask image and records it, and after a certain period of time, that is, the observation site after the contrast agent arrives. The X-ray image is digitized as a contrast image, and then the mask image is subtracted (subtraction) from the contrast image to erase the region without the contrast agent and display only the region with the contrast agent as a subtraction image on the monitor. is there.

In this case, it is necessary to save the above-mentioned image as clinical data, and normally, a live image (mask image, contrast image) is used as an image recording device in an external storage medium (magnetic tape, magnetic disk).
Transferred to and saved.

[Problems of the Background Art] FIG. 2 shows the current image information to be stored in the image recording device, i.
An example of a DF image obtained by using I. (Image Intensifier) is shown. In FIG. 4, the inside of the quadrangle shows the image 1 for one screen of the TV monitor.
The output image 2 from II is a clinically significant image inside the circle, but the remaining part 3 obtained by subtracting the II output image 2 from the image 1 for one screen is clinically meaningless and useless. Is.

When recording the current image data for one screen of the television monitor, conventionally, all the image data for one screen is recorded in the external storage medium. For this reason, clinically meaningless images (collection of unnecessary image data) are also recorded, so the image recording efficiency is low, and therefore the number of recorded images per external recording medium is reduced, and per image However, it also had the drawback of increasing the transfer time.

[Object of the Invention] The present invention has been made based on the above circumstances, and an object of the present invention is to provide an image recording apparatus with improved recording efficiency.

SUMMARY OF THE INVENTION The image recording apparatus according to the present invention has means for converting an analog image signal into a digital image signal, temporary storage means for temporarily recording the digital image signal, and an address corresponding to the address of the temporary storage means. Then, a pattern of a predetermined shape that divides the digital image signal stored in the storage means into necessary image information and unnecessary image information is stored, and it is determined whether the image signal read from the temporary storage means is the required image information. A pattern information storage unit that determines according to the read address, a recording control unit that records the necessary image information determined by the pattern storage unit on an external recording medium, and the necessary image information that is read from the external recording medium and supplied separately. The required image information and the required image information are combined based on the pattern information read from the pattern information storage means to reproduce the current image information. And a means for

Embodiments of the Invention An image recording apparatus according to the present invention will be described below with reference to FIG. 1 applied to an X-ray diagnostic apparatus.

In FIG. 1, an X-ray tube 11 and a top plate on which the subject P is placed
12, II 13 for optically converting a transmitted X-ray image, an optical system 14 for introducing an optical image, a TV camera 15 for converting an output image of the optical system 14 into an electric signal, a camera controller 16 for introducing a camera output, an analog image A / D converter that digitizes information 17
The X-ray diagnostic apparatus is configured by the above. Where A / D converter 1
The output image of 7 is the current image information corresponding to the display shown in FIG.

Reference numeral 18 denotes a current image memory which stores the output of the A / D converter 17 for one screen as current image information consisting of a collection of necessary image data and a collection of unnecessary image data, and will be described later as shown in FIG. The pattern image memory 19 has the same address space, for example, A _{00 to} A ₉₉ , and the current image information D _{00 to} D ₉₉ stored therein is stored.
_{The set} of necessary image data and the set of unnecessary image data in ₉₉ can be distinguished by a circular pattern having a predetermined diameter.

Reference numeral 19 is a pattern memory which has the same address spaces A _{00 to} A ₉₉ as the current image memory 18 and stores pattern information indicating a circular pattern having the above-mentioned predetermined diameter. For example, as shown in FIG. The pattern information in which "1" is set as the one corresponding to the group of necessary image data and "0" is set as the one corresponding to the group of unnecessary data is stored outside the circle.

The pattern memory 19 inputs the image address from the terminal a,
It is determined whether or not this image address is the address of the required image data, and if it is the address of the required image, the required signals S ₁ , S ₂ , S ₃ are output. The address generator 20 inputs the necessary signal S ₂ and outputs a memory address to the memory 21. Here, the address input from the terminal a is the memory
This is an address having an origin address A ₀₀ common to 18 and 19, and necessary / unnecessary processing of data is executed according to this address. The address generator 20 is composed of a counter, which counts up only when the necessary signal S ₂ is input, updates the memory address, and gives the memory 21 an address of only necessary image data. There is.

The memory controller 22 inputs the image address from the terminal a and the required image extraction command signal from the terminal b, so that the required image is extracted from the current image memory 17 to the memory 21 via the gate 23 when the required image is extracted. A memory control signal is output so that only required image data of the current image information is written in the memory 21.

Further, when the image of the current image information is reconstructed or the data is read, a memory control signal is output so that the memory 21 outputs the necessary image data.

The above is the configuration for extracting the necessary image data. Next, the configuration for storing in the external storage device will be described.
The memory controller 22 outputs a read command to the memory 21 in which the necessary image data is written, and outputs the necessary image data to the data bus (I / F) 24. The required image data output from the data bus (I / F) 24 is the data bus 2
Hard disk (HD), magnetic tape (MT) via 5
And the like are input to the external storage device 26, and the recording of the necessary image data is completed.

Next, a configuration for reconstructing the current image information from the necessary image data will be described. That is, the necessary image data output from the external storage device 26 is the data bus 25, the data bus (I /
F) is output to the memory 21 via 24. The address generator 20 and the memory controller 22 output a memory address write command to the memory 21, and write necessary image data in the memory 21. After writing all the necessary image data, the address generator 20 and the memory controller 22
A memory address and a read command are output to the memory 21, and necessary image data is output from the memory 21 to the image reconstructor 27.

The image reconstruction unit 27 outputs the necessary image data supplied from the memory 21 when the necessary signal S3 output from the pattern memory 19 is input, and when the necessary signal S3 is not input,
The data corresponding to the unnecessary image data separately supplied from the terminal c is output. Then, the data is analogized by the D / A converter 28 and is composed of the necessary image data group and the unnecessary image data group by the monitor 29. The current image information is displayed. An address reset signal is input to the terminal d in FIG.

The extraction of the necessary image data from the current image information and the reconstruction of the current image information from the necessary image data will be described in detail with reference to FIGS. 2 and 3.

That is, the current picture memory 18 of the address A ₀₀ to A _99, the present image information D ₀₀ to D ₉₉ are stored, whereas, the address A ₀₀ to A ₉₉
The pattern memory 19 has necessary 1 and unnecessary 0, thereby storing pattern information indicating a circle.

In the data extraction, the address A ₀₀ is designated from the outside, and the pattern memory 19 is scanned sequentially from the address A ₀₀ to A ₉₉ . Here, the address Aij of the pattern memory 19 is 0
At this time, no data is read from the current image memory 18, that is, it is regarded as unnecessary image data, and the new address is not updated. When the address Aij of the pattern memory 19 is 1, the data is read from the current image memory 18, that is, the necessary image data, and the new address is updated. In this way, the extraction of the necessary image data is performed by the current image memory 18
The data is read from the address, the new address is added to the data, and the data is output.

In the next reconfiguration, the address A ₀₀ is specified from the outside and the pattern memory 19 is sequentially addressed from the address A ₀₀ to A _99.
Scan up to. Here, the address Aij of the pattern memory 19
When is 0, data is not input from the outside and the data is input as an unnecessary image separately from the address of the current image memory 18.
When the address Aij of the pattern memory 19 is written to Aij, necessary image data is introduced from the outside and is written in the address Aij of the current image memory 18.

According to the present embodiment described in detail above, it is possible to extract only the clinically effective necessary image data within the circle set as the pattern information from the information of the current image and record it in the external storage device. Further, the current image information can be reconstructed by the necessary image data and the separate unnecessary image data.

Since the number of data to be recorded in the external storage medium can be reduced by extracting only the necessary image data from the current image information, the number of images that can be recorded per external storage medium is increased as compared with the conventional one, that is, the efficiency. The image can be recorded well.

Further, since the number of data to be recorded is reduced, there is an advantage that the time for transferring the data to the external storage device (time required for data recording) can be shortened.

In the above-mentioned embodiment, the pattern information which is the basis of the discrimination of the extracted data is explained as one circular shape corresponding to II, but it may be pattern information in which a plurality of figures are shown. In this case, distributed storage of the current image information is realized. Furthermore, it may be pattern information of an arbitrary shape set by the operator's RIO.

The current image information can be applied to general images other than the X-ray digital output line image.

As described above in detail, according to the present invention, means for converting an analog image signal into a digital image signal, temporary storage means for temporarily storing the digital image signal, and address of the temporary storage means A pattern having a predetermined shape is stored which has a corresponding address and divides the digital image signal stored in the storage means into necessary image information and unnecessary image information,
Pattern information storage means for determining whether or not the image signal read from the temporary storage means is necessary image information according to the read address, and recording control means for recording the necessary image information determined by the pattern storage means on an external recording medium. And means for reproducing necessary image information from the external recording medium, synthesizing the separately supplied unnecessary image information and the necessary image information based on the pattern information read from the pattern information storage means, and reproducing the current image information. There is provided an image recording apparatus having the above-mentioned structure and having improved recording efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention applied to an X-ray diagnostic apparatus combined with a DF apparatus, and FIG. 2 shows the address of the current image memory and the current image information stored therein in the same embodiment. FIG. 3 is a diagram showing addresses of the pattern memory and the stored pattern information in the same embodiment,
FIG. 4 is a diagram showing the display of the II image for explaining the necessary image data and the unnecessary image data. 18 …… Current image memory, 19 …… Pattern memory, 20 …… Address generator, 21 …… Memory, 22 …… Memory controller.

Claims (1)

[Claims] 1. A storage means for converting an analog image signal into a digital image signal, a temporary storage means for temporarily storing the digital image signal, and an address corresponding to the address of the temporary storage means. A pattern having a predetermined shape for dividing the digital image signal stored in the image into necessary image information and unnecessary image information is stored, and whether or not the image signal read from the temporary storage means is the necessary image information is used as a read address. A pattern information storage unit that determines the corresponding image information; a recording control unit that records the necessary image information determined by the pattern storage unit on an external recording medium; and a necessary image information that is read from the external recording medium and supplied separately. Image information and the necessary image information are combined based on the pattern information read from the pattern information storage means to reproduce the current image information. An image recording apparatus comprising: