JPH0231283A - Picture re-constituting device - Google Patents

Abstract

PURPOSE:To obtain high speed and to improve economization by parallelly executing re-constitution processing in each area being dividedly processed is executed, storing a processed result by the area, finally executing synthesization processing and obtaining a re-constituted picture. CONSTITUTION:An area dividing means 2 fetches picture information and divides these information per plural re-constituting areas and the picture information in each area are sent to a parallel re-constitution processing means 3. The parallel re-constitution processing means 3 execute parallel re-constitution processing to the picture information in each area and sends respective processing results to a storing means 4. By such parallel reconstitution processing, a re-constituting time obtains the high speed. The storing means 4 stores the respective processing results from the parallel re-constitution processing means 3 by the respective areas. A synthesizing / processing means 5 reads the stored information, which are stored to the storing means 4, by the respective areas, executes synthesizing / processing to these information and sends the information to a display means 7. Thus, the display means 7 displays a complete picture, for which the re-constitution processing is executed.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Field of Application) The present invention relates to reconstructing and displaying image information of a target part of a subject that is detected by a medical diagnostic device such as an X-ray CT device. The present invention relates to an image reconstruction device used for.

(Prior Art) In recent years, in the technical field of X-ray CT devices, etc., image reconstruction processing has been developed to display image information of a target part of a subject collected by this device on the screen of a display means such as a CRT. Many devices are used to do this.

Such image reconstruction apparatuses are required to have faster reconstruction speeds as image acquisition speeds increase due to technological advances in X-ray CT systems and the like.

A conventional example proposed to meet this requirement is shown in FIG.

The figure shows two image reconstruction devices 30A having the same configuration.
, 30B are used to reconstruct image information, and the processing results are added to Ei[ffi by an adder 32 operating under the control of the CPU 31, and the addition processing results are displayed via a display interface 33. This shows a device in which the display means 34 is used for feeding and displaying.

The image reconstruction devices 30A and 30B both include a reconstruction section 36 that performs reconstruction processing of image information, and an image memory 37.
It is equipped with. Incidentally, in FIG. 3, numeral 35 is an image storage means for storing the addition result of the adder 32.

However, in the apparatus having the above configuration, the image reconstruction apparatus 30A is conventionally used.

Although it is technically possible to speed up the reconfiguration process relatively easily since the 30B can be used as is, there is a problem in terms of hardware that the device configuration becomes large-scale and the manufacturing cost increases.

In addition, in the case of the above-mentioned device, two image reconstruction devices 30
For example, back projection information is divided and processed at the same rate by A and 30B, and these processing results are sent to the adder 3.
2, the complete reconstructed image information is subtracted by 1q at the display interface 33, so the adder 3
Rotation is what gives generality to the two-way display interface 33.

This becomes more noticeable as the number of image reconstruction devices increases in order to perform faster reconstruction processing.

On the other hand, it is also possible to perform the addition process in the adder 32 using software, but in this case, the addition process time becomes longer as the number of image reconstruction devices increases, and the demand for higher speed cannot be met.

Furthermore, the two image reconstruction devices 30A mentioned above.

In the case of 30B, since the conventional one is used as is, each image memory 37 is provided, which becomes an uneconomical configuration considering the above-mentioned shared processing.

(Problems to be Solved by the Invention) As mentioned above, in the conventional method, there are problems such as increasing the scale of the device configuration and being unsatisfactory from an economic point of view, or
There is a problem in that it cannot meet the demand for high-speed processing.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an image reconstruction device that can fully meet the demands for high-speed processing, does not require an increase in the scale of the device configuration, and is also economically efficient.

[Configuration of the Invention (Means for Solving the Problems) The present invention provides an image reconstruction device that reconstructs image information and displays it on a display means, which divides the image information into a plurality of reconstruction regions. A region dividing means, a parallel reconstruction processing means for performing reconstruction processing in parallel on image information for each divided region, and a storage means for storing processing results of the parallel reconstruction processing means for each region. , and a composition processing means for performing composition processing on the storage information for each area stored in the first recording means and sending the resultant to the display means.

The division processing of the image information by the region division means is a division 1 processing of an image matrix, and the reconstruction processing of the parallel reconstruction processing means is for pack projection information in the image information.

(for production) The operation of the apparatus having the above configuration will be explained below.

The area dividing means of this device takes in image information, divides it into a plurality of town constituent areas, and sends the image information for each area to the parallel reconstruction processing means.

The parallel reconstruction processing means performs parallel reconstruction processing on the image information of each region and sends the respective processing results to the storage means. Such parallel reconstruction processing speeds up the reconstruction time.

The storage means records each processing result from the parallel reconstruction processing means for each area.

The composition processing means reads the storage information for each area stored in the storage means, performs composition processing on the information, and sends the resultant information to the display means.

As a result, the display means displays a complete reconstructed image.

(Example) The present invention will be explained in detail below.

The image reconstruction device 1 shown in FIG. 1 is an X-ray CT
A region dividing means 2 receives continuous image information of a subject's target region collected by a medical diagnostic device such as a medical diagnostic device, and divides the image into regions using an image matrix, as will be described in detail later. Parallel reconstruction processing means 3 takes in image information for each buried region and performs reconstruction processing on these in parallel, that is, simultaneously, and the processing results of this parallel reconstruction processing means 3 are transferred to each region. The record/receiver means 4 which is stored separately and each storage information stored in the storage means 4 are read out and converted into information constituting - complete reconstructed images (hereinafter referred to as "reconstructed image information"). It has a composition processing means 5 for performing composition processing and sending out the processing results, and a control means 6 for controlling the operation of each of the means 2, 3, 4.5.

The processing results of the synthesis processing means 5 are sent to the display means 7 for display, and are also sent to the image storage section 8 to be stored and held for later use.

Next, details of each element of the image reconstruction device 1 will be explained with reference to FIG. 2.

Under the control of the control means 6, the area dividing means 2 takes in image information (consisting of an mxm image matrix) in frame units, for example, and performs n preprocessing processes to divide the information into nxn areas. n convolution units each performing convolution 5Ia (blur correction processing) on the image information of each region divided by the units 11a, 11b, . 12a, 12b, . . . 12n. It is assumed that the values of m and n mentioned above are both positive integers, and m is divisible by n.

The parallel reconstruction processing means 3 processes each of the convolution sections 12a under the control of the control means 6.

n pack projection units 13a, 13b, . . . , 13n that receive each output image information from 12b, . Each pack projection section 13a.

Offset values Xo, Yo, ΔXo, ΔYo in the X direction and Y direction for 13b, . . . , 13n, respectively.

Xl, Yl, ΔXt, ΔYt, -, Xn, Yn.

ΔX n and ΔYn are given, and each of the pack projection units 13a, 13b, . . . 13 is
Constant generators 14a and 14b that set the location of back projection processing at n.

..., 14n.

The recording/storage means 4 is an area memory 15a that stores the processing results of each back projection section 13a, 13b, . . . 13n under the control of the control means 6.

15b, . . . , 15n.

In FIG. 2, 16a, 16b, .

Next, the operation of the apparatus having the above configuration will be explained.

When image information for one frame, for example, of a target region of a subject collected by an X-ray CT device (not shown) or the like is sent to the region valve glJ means 2, each of the processing units 11a, 11b,
, 11rN, under the control of the control means 6, divides the image information into a matrix region consisting of n x n values, and divides these into matrix regions, respectively, into a combo sonification section 12a,
12b, . . . , 12n.

Each convolution section 12a, 12b,...12n
performs convolution processing on each piece of sent divided image information, and sends each processing result to each pack projection unit 13a.

Send to 13b, ., 13n.

Each pack projection section 13a, 13b.

. . , 13n perform backup processing on each input image information at a location determined by each offset value from each constant generator 14a, 14b, . and execute it.

By performing such back projection processing in parallel in the n pack projection units 14a, 14b, . . . 14n, compared to the conventional device, 5! !
! Processing time can be accelerated.

Each pack projection section 13a, 13b.

..., 3n processing results are stored in the corresponding area memo') 15 a, 15 b, -, 15n Ni memory iE
'tL, and each Bacher memory 16a, 16b,...
・.

The signal is sent to the synthesis processing means 5 via 16n. The synthesis processing means 5 converts each piece of information sent under the control of the control means 6 into one
Execute processing to combine with reconstructed image information for one frame,
This is sent to the display means 7 and the image storage section 8.

As a result, one frame of the reconstructed image will be displayed on the screen of the display means 7, and the reconstructed image information for one frame will be stored and held in the image recorder/storage section 8. provided for use.

The present invention is not limited to the embodiments described above,
Various modifications are possible within the scope of the gist.

For example, in addition to the above-mentioned embodiment, even if the pre-processing and convolution processing of the image information taken into this device are not divided, and only the reconstruction processing is divided, the same result as in the case described above may be applied. Can be implemented.

[Effects of the Invention] According to the present invention described in detail above, reconstruction processing is performed in parallel for each divided region, and the processing results are also stored for each region, and finally synthesized to obtain a reconstructed image. This makes it possible to speed up configuration processing, prevent the overall configuration of the device from becoming large-scale, and create an image reconstruction device that does not require more memory capacity than necessary and is excellent in terms of economy. can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a device according to an embodiment of the present invention, FIG. 2 is a detailed block diagram of the same device, and FIG. 3 is a block diagram of a conventional device. DESCRIPTION OF SYMBOLS 1... Image reconstruction device, 3... Parallel reconstruction processing means, 5... Combination processing means, 8... 1 part of image recording. 2... Area division means, 4... Storage Means, 7... Means of display, agent patent attorney rules
Takeshi Kondo figure

Claims (3)

[Claims] (1) An image reconstruction device that reconstructs image information and displays it on a display means, including an area dividing means that divides the image information into a plurality of reconstruction areas, and an area division unit that divides the image information into a plurality of reconstruction areas, and a a parallel reconstruction processing means for performing reconstruction processing in parallel on the data; a storage means for storing the processing results of the parallel reconstruction processing means for each region; and storage information for each region stored in the storage means. 1. An image reconstruction device comprising: composition processing means for performing composition processing and sending the composite data to display means. (2) The image information dividing process by the area dividing means includes:
The image reconstruction apparatus according to claim 1, wherein the image reconstruction apparatus performs image matrix division processing. (3) The image reconstruction device according to claim 1, wherein the reconstruction processing by the parallel reconstruction processing means is performed on back projection information in image information.