JPH01119234A - Ct apparatus - Google Patents

Abstract

PURPOSE:To perform the reconstitution and display processing of an image at a high speed, by constituting a reconstituting operation means and a transmission means so as to make it possible to execute the reconstitution and display processing of the image without allowing a control means to directly participate. CONSTITUTION:A large amount of imaging data are successively outputted from a data collection apparatus 21 at a high speed and stored in a data buffer 15. The imaging data stored in the data buffer 15 are successively transmitted to a high speed reconstitution apparatus 21 by the indication from a CPU 11 and the operation for the reconstitution of an image is executed. The reconstituted image data are successively written on one image memory 18 or given to a monitor 20 through a display control apparatus 19 to be displayed.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention c. This invention relates to improvements in technology for displaying data contents as images at high speed.

(Prior Art) This type of conventional CT scanner collects photographic data for creating one tomographic image in one scanning operation, and reconstructs the collected photographic data to create an image. It was used for display purposes.

On the other hand, this type of CT scanner requires: (1) short-time imaging to avoid artifacts due to body movement during the imaging time;

(2) Continuous slice imaging, in which data is first acquired continuously at high speed and then reconstructed in order to shorten the high-speed time taken by the subject.

(3) A solar system that collects a plurality of cross-sectional imaging data simultaneously in a series of sequences using the FA field sub-control as in NMR-CT.

The technology for collecting imaging data of preliminary tomography planes in a short period of time has been established.

However, in the case of conventional CT table equipment, CT scan 4:
Even if Yana itself has the ability to collect high-speed data, there is a part that takes in the collected data, a part that saves the collected data, a part that performs image reconstruction processing from the stored collected data, and a part that displays it. Since each of them was configured as shown in FIG. 2, there was a limit to how high-speed processing capacity could be improved.

(Problems to be Solved by the Invention) That is, in the conventional CT table device of this type, the data acquisition device 5
The imaging data collected from the CT scanner is stored in the memory in the CPU 1 via the interface 4 and the data bus 3, and then from the memory in the CPU 1 via the data bus 3 to the disk 2 for data storage. Stored.

At the same time, the photographic data is transferred from the memory in the CPU to the high-speed reconstruction device 6 via the data bus 3 and interface 4 for image reconstruction.

Then, arithmetic processing is executed in the high-speed reconstruction device 6, and the final result of this arithmetic processing is stored on the image memory 7 as reconstruction data for one-screen display.

The cpui stores reconstructed data on the image memory 7 in the memory within the CPU 1 via the interface 4 and data bus 3. Next, the reconstructed data from the image memory 7 stored in the memory within the CPU 1 is transferred to the disk 2 and the display control device 8 via the data bus 3. Therefore, the display control device 8 can display contents corresponding to the reconstructed data stored in the image memory 7 on the display screen of the monitor 9.

The above operations are performed in one 8I image with a CT scanner! @It will be repeated every time you perform a shadow.

In the case of such a conventional system configuration, each of the above-mentioned operations is repeated in a short time when performing high-speed scanning or continuous scanning, so it is necessary to increase the transfer speed of the data bus 3 and the control speed of the CPU 1. required.

However, there is a limit to the ability to satisfy the demand for higher speeds, and it has conventionally been difficult to further speed up image reconstruction and subsequent display processing.

SUMMARY OF THE INVENTION An object of the present invention is to provide a CT table apparatus having a system configuration that can dramatically improve the speed of image reconstruction and subsequent display processing.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above-mentioned objects, the present invention sequentially stores the shadow data from the CT scanner 11 collected by the data collection means into a data buffer. a reconstruction calculation means for directly receiving the sequentially stored imaging data, performing calculations for image reconstruction, and storing final result data from this calculation in an image memory in correspondence with the image; a transfer means that directly transfers the final result data written in the image memory to the display means when data writing is completed; and control that drives and controls the reconfiguration attvi means and the transfer means, respectively. The gist is to have the means and.

(Function) With the CT display device according to the present invention, there is no need to transfer VRI shadow data and reconstruction data to the data bus from the collection of image data to the completion of image reconstruction, and there is no need to transfer reconstruction data from the control means. It is sufficient to give simple instructions to the means and the transfer means.

(Example) FIG. 1 is a block diagram showing the main part configuration of a zero-copy device according to an example to which the present invention is applied.

In the CTI system of this embodiment, a CI (CI)Ull is provided as a control center for the entire system, and a disk 12.degree. interface 14 and a display control device 19 are connected to a data bus 13 to which this CPU 11 is connected.

The interface 14 has a data buffer 1.
5. High-speed reconstruction Xi! i device 1 device and bus switch 17 are connected, and these are operated in response to the fI11 command of 0Full. Furthermore, the display on the monitor 20 is controlled by the display control device 19 .

In each section connected to the interface 14, the data buffer 15 consists of a large-capacity buffer memory that can sequentially store imaging data from the CT scanner 17 collected by the data collection device 21.

The high-speed reconstruction device 16 directly receives the photographic data sequentially stored in the data buffer 15, performs calculations for image reconstruction, and transfers the final result data from this calculation to the bus switch 1.
7, the images are stored in each of a plurality of image memories 18 corresponding to the images.

The bus switch 17 performs a switching operation in response to an instruction from the CPU 11, and has a plurality of image memories 18.
In order to prevent contention between writing data to the image memory 18 and reading data from the image memory 18 in the same image memory, the final result of the image reconstruction operation by the high-speed reconstruction device v116 is transferred to one of the plurality of image memories 18. The reconstructed image data is written in the image memory 18 as reconstructed image data, and the reconstructed image data written in any of the image memories 18 is transferred to the display control device 19.

In other words, each of the plurality of image memories 18 is also used as a display memory for the display control device 19.

Next, the operation will be described. In high-speed scanning or continuous scanning, a large amount of imaging data is sequentially output from the data collection device 21 at high speed. This photographic data is sequentially stored in a data buffer 15 having a large capacity memory structure.

The photographic data stored in the data buffer 15 is transferred to the CPU
The information is sequentially transferred to the high-speed reconfiguration device 21 according to instructions from the II,
As a result, the high-speed reconstruction device 21 executes calculations for image reconstruction.

At this point, the CPU 11 processes a plurality of image files 1 to be used in the reconstruction calculation by the high-speed reconstruction device 21.
An instruction is given to the bus switch 17 to select one of the images from the image memory 18.
One of the pictures is selected one after another. Reconstructed image data will be written onto the selected image memory 18.

Furthermore, the reconstructed image data that has been reconstructed and stored in the image memory 18 is accessed from the image memory 18 selected by one display control device in response to an instruction from the CPLll to the bus switch 17.

Therefore, the content of the reconstructed image data is displayed on the display screen of the monitor 20 in response to the control operation of the display control device 19.

As mentioned above, when executing a series of processing operations from data collection of photographic data to completion of image reconstruction, the collected photographic data and image data reconstructed by the high-speed reconstruction device 16 are transferred to the Data Pasco 3. There's no need.

Along with this, the CPU 11 sends an interim instruction to the data buffer 15. It is only necessary to add it to the high-speed reconfiguration device 16 and the bus switching PJ 17.

Further, since the image memory 18 selected by the display control device 19 is accessed and the image is displayed on the display screen of the monitor 20, the image memory 18 selected by the display control device 19 is accessed, so that the image is displayed on the display screen of the monitor 20 as soon as the image reconstruction is completed by the high-speed reconstruction device 17. It is possible to display the reconstructed image on 20.

Furthermore, the presentation data stored in the data buffer 15 and the reconstructed image data stored in the image memory 18 are
It is sufficient to transfer the data to the disk 12 via the interface 14 and data bus 13 at an appropriate time when the CPU II and data bus 13 are infrequently used.

For this reason, the CT apparatus of this embodiment can be used in systems that perform multi-sectional imaging in a short period of time, such as high-speed scanning, continuous scanning, and three-dimensional data collection.
It is possible to efficiently collect photographic data and reconstruct and display images based on the collected photographic data.

[Advantageous Effects of the Invention 1] As explained above, the CT apparatus of the present invention includes the reconstruction means and the transfer means so that the image reconstruction display process can be executed without direct involvement of the control means. , the image reconstruction and display processing can be significantly sped up compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the main part structure of a CT apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the main part structure of a conventional CT apparatus. 11...CI)Ll 12...Disk 13...Data bus 14...Interface 15...Data buffer 16...High-speed reconfiguration device 17...Bus switch 18...Image memory 19...Display system V! 1 20...Monitor fee;
Alone, ゛Physician Nori is near.

Claims (2)

[Claims] (1) Sequentially store the imaging data from the CT scanner collected by the data collection means in a data buffer, directly receive the sequentially stored imaging data and perform calculations for image reconstruction, and final a reconstruction calculation means for storing result data in image correspondence in an image memory; and when writing of the final result data to the image memory is completed, the final result data written in the image memory is sent to a display means. A CT apparatus comprising: a transfer means for direct transfer; and a control means for driving and controlling the reconstruction calculation means and the transfer means, respectively. (2) When a plurality of image memories are used, when the final result of the reconstruction calculation is being written by the reconstruction calculation means into any of the plurality of image memories, the control means may be configured to 2. The CT apparatus according to claim 1, wherein the transfer means controls the transfer of write data in the image memory to the display control means.