JPH1038819A - Tomograph - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set an operator free from complicated work by storing photographing information data and image processED result screen data associated with tomographic image data in tomographic image storing means and obtaining the tomographic image photographed by planning scan and image processing result screen as a hard copy. SOLUTION: A tomograph C specifies plural inspection portions relevant to one subject, performs tomography, zooming, image processing, and stores information in an associated information file. Next, plural well photographed tomographic images are selected, photographing condition a photographing position, a zooming area, and image processing parameter or the like are extracted from associated information, and a planning scan table is prepared. Tomography is reproduced in the other subject of the same type or same shape according to the planning scan table. The tomographic image, zooming image, and image processing result screen are automatically outputted respectively as a hard copy from an image hard copy device 12 and the image processing and calculation result from an LBP(laser beam printer).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a tomographic imaging apparatus, and more particularly to a tomographic imaging apparatus that performs imaging based on a planned scan table when inspecting a mass-produced product.

[0002]

2. Description of the Related Art A conventional industrial computer tomography apparatus (CT scanner) may inspect a large number of inspected objects of the same type and the same type (for example, mass-produced cast cylinders).

In this case, an inspectable photographing position, a partially enlarged reconstruction (zooming) area, a dimension measurement position, a region of interest (ROI) area for performing pixel statistics / calculation, and an inspection object for one inspection object in advance. A preliminary tomographic image photographing is executed by selecting an area for performing profile measurement, an area for detecting a defect / foreign matter, and the like. Based on the result of the preliminary tomographic image photographing, a full-scale photographing plan such as a photographing position and photographing conditions (measurement conditions) is made. A tomographic image taken based on such a plan is called a planned scan, and a table that stores data such as photographing conditions is called a planned scan table. And
After inspecting the mass-produced product based on the planned scan, the captured tomographic image can be output as a hard copy.

[0004]

However, the conventional CT scanner has the following disadvantages in terms of usability when obtaining a hard copy output.

A procedure for outputting a hard copy of a tomographic image after a planned scan (after an inspection) is as follows. That is, first, the captured tomographic image is recorded on a recording device (such as a magnetic disk). Next, a tomographic image is displayed on the display device from the recording device, and an operator who confirms the tomographic image depresses a printout button of a hard copy device (for example, a laser beam printer) at intervals of one minute, for example, one by one. Outputting a hard copy. Pressing the button at one-minute intervals is a troublesome task for the operator, although it is a one-handed task while performing another task.

[0006] During the planned scan, image processing is performed on the tomographic image, and a result screen is created (for example, a part of the tomographic image is specified, and a measurement value such as an average value of the part is recorded. That is, [the tomographic image + measured value] is recorded in contrast to the recording of the tomographic image only). To output the result screen to the hard copy device, the operator has to manually start the hard copy device each time the above-described image processing is performed. This operation was also troublesome for the operator.

It is assumed that a result screen (tomographic image + measured value + measurement condition) of the image processing performed during the planned scan is output as a hard copy. In order to lose the hard copy and obtain the image processing result screen again, it was necessary to reset the measurement conditions and execute the image processing again. In view of the above, an object of the present invention is to display a tomographic image or an image processing result screen taken by a planned scan on a hard disk.
An object of the present invention is to provide a tomographic image photographing apparatus in which an operator does not need to perform a troublesome operation when obtaining a copy.

[0008]

According to the first aspect of the present invention, there is provided a tomographic image photographing means for photographing a tomographic image of a test object, and a tomographic image photographed by the tomographic image photographing means. First, the shooting information corresponding to the image is stored as supplementary information.
Tomographic image storage means, tomographic imaging plan table creating means for extracting imaging information corresponding to the tomographic image from the first tomographic image storing means, and creating a tomographic imaging planning table, and according to the tomographic imaging planning table A second tomographic image storage means for storing a tomographic image photographed by the tomographic image photographing means; and a tomographic image print output means for outputting a hard copy of the tomographic image stored in the second tomographic image storage means. It is characterized by.

According to the first aspect of the present invention, a tomographic image of one test object is previously captured by the tomographic image capturing means. First
The tomographic image storage means stores the photographing information as supplementary information in addition to the tomographic image photographed by the tomographic image photographing means.
The tomographic imaging plan table creating means extracts tomographic imaging information from the first tomographic image storage means and creates a tomographic imaging planning table. The second tomographic image storing means stores the tomographic images taken by the tomographic image taking means according to the tomographic image taking plan table. The tomographic image print output means outputs a hard copy of the tomographic image stored in the first or second tomographic image storage means.

[0010] In the invention described in claim 2, the imaging information includes tomography position information, position and size information of a partially enlarged reconstruction area, dimension measurement position / threshold information, and statistics / calculation of pixel values. It is characterized by being at least one of area area information, profile position information, defect / foreign matter detection area / threshold parameter information. The invention according to claim 3 is characterized in that a result screen obtained by performing image processing based on the photographing information is stored in the second tomographic image storage means. According to a fourth aspect of the present invention, the tomographic image is selected by selecting at least one of a tomographic image stored in the first or second tomographic image storage means, imaging information corresponding to the tomographic image, or the result screen. A hard copy is output from the image print output means.

According to the second to fourth aspects of the present invention, the tomographic image print output means outputs a hard copy of a tomographic image, at least one of various photographing information (photographing conditions), or a result screen. Output.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. FIG. 1 is a block diagram of a tomographic imaging apparatus C according to the present embodiment. In the present embodiment, a second generation X-ray CT will be described. In FIG. 1, a magnetic disk 2 is connected to a computer 1. The magnetic disk 2 has a built-in OS and a control program, and also has data of a photographed tomographic image, a photographing position of the tomographic image, a zooming area, and a dimension measurement. Additional information for each tomographic image, including statistics and calculation of the region of interest, profile measurement, parameters for detecting defects and foreign matter, and the like are stored.

The computer 1 inputs the X-ray projection data to the data preprocessor 4 while synchronizing with the X-ray projection data acquisition device 3. The input X-ray projection data is subjected to pre-processing such as X-ray dose correction, detector sensitivity correction, logarithmic conversion and the like by the data pre-processor 4.

The preprocessed X-ray projection data is subjected to a backprojection in which the data is returned to the original direction in each projection direction after a tomographic image reconstruction processor 5 superimposes a reconstruction filter for removing image blur. , A tomographic image is reconstructed. The reconstructed tomographic image is displayed on the tomographic image display 6.

The zooming is performed by a tomographic image reconstruction processor 5, and the zoomed image is displayed on a tomographic image display 6.
Will be displayed. Image processing is performed by the computer 1,
The image processing result screen is displayed on the tomographic image display 6, and the image processing calculation result is displayed on the control CRT 7.

The tomographic image, zooming image, and image processing result screen created as described above are stored on the magnetic disk 2 and also on the magneto-optical disk device 10. The magneto-optical disk device 10 is convenient when, for example, long-term storage data is divided and stored.

The tomographic image, the zooming image, and the image processing result screen are automatically output by the image hard copy device 12, and the image processing calculation result is automatically output by the LBP (laser beam printer) 11. . The image selection, the parameter value display, and the like when creating the planned scan table are performed by the control CRT 7, the keyboard 8, the mouse 9, and the like.
And so on.

Next, the operation of this embodiment will be described with reference to FIGS. As shown in FIG. 2, the tomographic imaging apparatus C specifies a plurality of inspection locations for one inspection object using the control CRT 7, the keyboard 8, the mouse 9, and the like.
Perform tomography, zooming, and image processing.

At this time, the information shown in (1) to (3) in FIG. 3 is stored in the supplementary information file of each tomographic image of the plurality of inspection locations (step S1). That is, is as follows.

Fault position H (see FIG. 4A) Zooming parameter (see FIG. 4B) Dimension measurement parameter (see FIG. 5) Statistics / calculation parameter (see FIG. 6A) Profile parameter (see FIG. 6 B)) Defect / foreign matter detection parameter (see FIG. 7) Other tomography parameters (for example, there are the following) [X-ray tube voltage / current, slice thickness (1, 2, 4 mm),
Imaging area (600φ, 300φ, 150φ), filter function (for plastic, aluminum, iron), imaging time, instruction to output hard copy of tomographic image, instruction to output measurement result to LBP] Only a plurality of tomographic images in which the target portion is well captured are selected (step S2), and the imaging conditions, imaging position, zooming area, image processing parameters, and the like of the tomographic images shown in FIG. 3 are extracted from the supplementary information of the selected images. Then, a planned scan table is created (step S3).

According to the planned scan table,
The tomography is reproduced on another inspection object of the same shape (for example, a mass-produced product). That is, tomography of another inspection object is performed under the same imaging conditions as the planned scan table, and image processing (dimension measurement, statistics / calculation of pixel values, profile measurement, defect / foreign matter detection, etc.) after tomography is also performed under the same conditions. Perform in. This is performed for a mass-produced inspection object (step S4).

Each tomographic image, zooming image and image processing result screen are stored on the magnetic disk 2 and the magneto-optical disk 10 under the control of the computer 1 (step S5).

Each tomographic image, zoomed image, and image processing screen are automatically output as a hard copy from the hard copy device 12, and the image processing calculation results are automatically output as a hard copy to the LBP 11 (step S6). .

As shown in FIG. 8, conventionally, for example, a plurality of tomographic images can be photographed under the same conditions at a position of 600 mm (height H12) of the test object.
It was impossible to shoot at the position of 0φ (height H12). On the other hand, according to the present embodiment, various photographing conditions are stored, and desired photographing (for example, zoom photographing at 300φ and 600φ) can be performed by selecting the optimum condition.

In this embodiment, the second generation X
Although the case of the X-ray CT scanner has been described, other generations of C
Of course, the present invention can be applied to a tomographic apparatus (CT scanner) such as a T scanner, an ultrasonic CT, a γ-ray CT, a neutron ray CT, an infrared CT, and an NMR-CT. Further, in the present embodiment, the tomographic imaging apparatus has been described. However, the tomographic imaging position is defined as an image collection position, a zooming area,
If the image processing parameters are set to be more general image processing parameters, the same effect can be naturally obtained even in an image acquisition apparatus in a wider range.

[0026]

As described above, according to the invention described in each claim, the tomographic image storage means is attached to the tomographic image data,
Since the shooting information (shooting conditions) data and the screen data resulting from the image processing are stored, a hard copy can be created by simply selecting a tomogram or a tomogram with shooting information or a result screen as necessary. The output can be automatically output from the output printing means.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a flowchart of the embodiment.

FIG. 3 is an example of incidental information at the time of tomographic image capturing in the embodiment.

4A and 4B show the accompanying information, wherein FIG. 4A shows a tomographic position and FIG. 4B shows a zooming parameter.

FIG. 5 is a continuation of the supplementary information shown in FIG. 4 and is a dimension measurement parameter.

6 is a continuation of the supplementary information shown in FIG. 4, and FIG.
Is a statistical / calculation parameter, and (B) is a profile parameter.

FIG. 7 is a continuation of the supplementary information shown in FIG.
This is a foreign object detection parameter.

FIG. 8 is a diagram illustrating that shooting can be performed under various optimum conditions in the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Computer (tomographic imaging plan table preparation means) 2 Magnetic disk (first and second tomographic image storage means) 3 X-ray projection data acquisition device (tomographic imaging means) 4 Data preprocessing processor 5 Tomographic image reconstruction processor 6 Tomographic image display 7 Control CRT 8 Keyboard 9 Mouse 10 Magneto-optical disk device (First and second tomographic image storage means) 11 Laser beam printer (Tomographic image print output means) 12 Image hard copy device (Tomographic image print output means)

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location G06T 1/00 G01N 24/08 510Y // G01V 5/00 G06F 15/62 390B (72) Inventor Teruo Yamamoto 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu plant, Toshiba (72) Inventor Sumiko Kominato 1-futoshi-cho, Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu plant, Toshiba

Claims (4)

[Claims] 1. A tomographic image photographing means for photographing a tomographic image of a test object, a first tomographic image storing means for storing photographing information corresponding to a tomographic image photographed by the tomographic image photographing means as supplementary information, A tomographic imaging plan table creating means for extracting imaging information corresponding to the tomographic image from the first tomographic image storing means and creating a tomographic imaging planning table; and the tomographic imaging means according to the tomographic imaging planning table. A tomographic image, comprising: a second tomographic image storage means for storing a photographed tomographic image; and a tomographic image print output means for outputting a hard copy of the tomographic image stored in the second tomographic image storage means. Shooting equipment. 2. The photographing information includes tomographic position information, position of a partially enlarged reconstruction area, size information, dimension measurement position / threshold information, region of interest area information for statistical / calculation of pixel values, profile position information, Defect / foreign matter detection area
2. The tomographic imaging apparatus according to claim 1, wherein the information is at least one of threshold parameter information. 3. The tomographic image photographing apparatus according to claim 1, wherein a screen resulting from image processing based on the photographing information is stored in the second tomographic image storage means. 4. A tomographic image stored in the first or second tomographic image storing means, at least one of photographing information corresponding to the tomographic image, and the result screen are selected, and selected from the tomographic image print output means. 4. The tomographic imaging apparatus according to claim 1, wherein a hard copy is output.