JPH04344491A - Radioscopic examining device - Google Patents

Abstract

PURPOSE:To display a radioscopic image of a subject to be examined whereby the three-dimensional structure of the subject to be examined can be grasped with ease. CONSTITUTION:A conical X-ray beam radiated from an X-ray tube 1 is converted by a fixed colimeter 14 into a sector X-ray beam, which is in turn converted into a flying pencil X-ray beam for scanning using as scanning faces two parallel circular planes having a radiation source as their apex. X-rays scattered from a subject 7 to be examined which is moved by a conveyor 8 are detected by a scattered X-ray detector 19 as to the whole scanning face by an X-ray which scans the first scanning face 301 and by a pencile X-ray beam which scans the second scanning face 302. A scattered X-ray image of the subject 7 to be examined which is obtained from the pencile X-ray beam by which the first scanning face 301 is scanned is made to correspond to the left-eye image and a scattered X-ray image of the subject 7 to be examined which is obtained from the pencile X-ray beam by which the second scanning face 302 is scanned is made to correspond to the right-eye image, thereby providing three-dimensional display.

Description

[Detailed description of the invention]

[Purpose of the invention]

0001

[Industrial Application Field] The present invention is a radiographic inspection method in which a radiographic image of an inspected object is obtained and a fluoroscopic inspection is performed by irradiating the inspected object with penetrating radiation and measuring the radiation from the inspected object. The present invention relates to an apparatus, and particularly to an X-ray inspection apparatus that displays scattered X-ray images and transmitted X-ray images of an object to be inspected in a baggage inspection apparatus or the like.

0002

2. Description of the Related Art It is widely known that the internal structure of an object to be inspected can be visualized by using X-rays transmitted through the object. Furthermore, when X-rays are incident on an object to be inspected, some of them are scattered by atoms constituting the substance, a well-known phenomenon known as the Compton effect. In particular, when examining the inside of an object to be inspected using scattered X-rays due to the Compton effect, substances with low atomic numbers scatter X-rays well. Therefore, it becomes possible to visualize even substances with low atomic numbers (such as non-metals), which were previously difficult to capture because they were transparent to transmitted X-rays. By applying this principle, it has become possible to see through scattered X-ray images of low atomic number materials, such as plastics or powders, mixed with materials that are difficult for X-rays to pass through. One type of radiographic inspection apparatus is an X-ray inspection apparatus for baggage inspection, which inspects baggage brought onto an aircraft at an airport, and prohibited import/export substances. An outline of this conventional X-ray inspection apparatus for baggage inspection will be explained below with reference to the drawings.

[0003] In FIG. 11, reference numeral 1 denotes an X-ray tube, which emits conical X-rays 2 . A fixed collimator 3 collimates the irradiated conical X-ray 2 into a fan-shaped X-ray beam 4. Reference numeral 5 denotes a rotating collimator, which converts the fan-shaped X-ray beam 4 into a flying spot-shaped pencil X-ray beam 6 that is scanned up and down within the fan-shaped scanning plane. Reference numeral 7 denotes an object to be inspected that is conveyed at a constant moving speed by a conveyor 8, and the pencil X-ray beam 6 scans the side surface of the object 7 up and down on the inspection surface side. Reference numeral 9 denotes a transmitted X-ray detector, which detects transmitted X-rays that have passed through the inspected object 7 and outputs a transmitted X-ray dose signal. 10 is a scattered X-ray detector, which detects scattered X-rays scattered backward from the inspection surface of the object 7 (toward the scattered X-ray detector 10 side)
rays and outputs a scattered X-ray dose signal. 11 is transparent
A spot position signal of the pencil X-ray beam 6 detected by a position detector (not shown) which is a line data collector;
The transmitted X-ray dose signal at the spot position is A/D converted to collect spot position data and transmitted X-ray data. Reference numeral 12 denotes a scattered X-ray data collector, which A/D converts the spot position signal of the pencil X-ray beam 6 detected by a position detector (not shown) and the scattered X-ray dose signal at the spot position to generate spot position data. Collect scattered X-ray data. 13 is an image display device which processes one frame of transmitted X-ray data from the transmitted X-ray data collector 1 and displays the transmitted X-ray image in red on the screen; One frame of scattered X-ray data is image-processed and the scattered X-ray image is displayed in green on the screen of the image display 13.

In the X-ray inspection apparatus for baggage inspection constructed as described above, the conical X-rays 2 from the X-ray tube 1 are scanned vertically in a fan-like fashion by a fixed collimator 3 and a rotating collimator 5. Collimate into pencil X-ray beam 6. Since the object 7 to be inspected is continuously moved on the conveyor 8 so as to cross this pencil X-ray beam 6, the pencil X-ray beam 6 raster-scans the side surface of the object 7 to be inspected. . In this way, the amount of transmitted X-rays and the amount of scattered X-rays from the entire inspection surface of the object 7 to be inspected are detected, one line of transmitted X-ray data that is collected sequentially is converted into image data, and the transmitted X-ray images are converted into image data one after another. It is displayed on the screen of the display device 13.

Similarly, scattered X-ray data is converted to scattered X-ray image data, and the scattered X-ray image is displayed on the image display 13. These transmitted X-ray images and scattered X-ray images were colored in different colors and displayed on the screen of a single image display 13 in a superimposed manner. Alternatively, the transmitted X-ray image and the scattered X-ray image were displayed separately on two screens of the image display 13.

Airport baggage inspection is performed using fluoroscopic images (transmitted X-ray images, scattered X-ray images,
In a short time, the inspector visually inspects the transmitted X-ray image of the inspected object 7 to detect metal dangerous objects such as pistols and knives, and objects that cannot be detected in transmitted X-ray images such as plastic bombs and drugs. Nonmetals were detected using scattered X-ray images.

[0007]

[Problems to be Solved by the Invention] As described above, in the conventional apparatus, the method of coloring the transmitted X-ray image and the scattered X-ray image in different colors and displaying them in a superimposed manner on one screen makes it difficult to There was a problem in that the images overlapped, making it difficult to understand the information on each image. Furthermore, since the conventional apparatus displays the transmitted X-ray image and the scattered X-ray image separately on two screens, there is a problem in that it is difficult to understand the mutual relationship between the respective images. In addition, both display methods have the problem that the internal three-dimensional structure of the object to be inspected cannot be easily understood.

[0008] Therefore, if the internal three-dimensional structure of the object to be inspected cannot be easily understood, inspections of the object to be inspected are carried out in a short period of time, which may lead to omissions in inspections and make it impossible to perform highly reliable inspections. There was a problem. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a radiographic inspection apparatus that displays a radiographic image of an inspected object that allows the three-dimensional structure of the inspected object to be easily understood. [Structure of the invention]

[0009]

[Means and operations for solving the problem] In order to achieve the above object, in the first generation, a radiation generating means that generates radiation, and a radiation generating means that generates radiation, a radiation beam scanning means for collimating a radiation beam irradiated onto an object to be inspected by alternately scanning a plurality of fan-shaped scanning planes that are approximately parallel to each other with a radiation source as an apex; and a radiation beam scanned by the first scanning plane. The beam detects scattered radiation scattered from the inspected object,
Alternatively, the transmitted radiation transmitted through the inspected object is detected, the first radiation data for the entire inspection surface is output, and the scattered radiation scattered from the inspected object is detected by the radiation beam scanned on the second scanning surface. a radiation data collection means that detects transmitted radiation that has passed through the object to be inspected and outputs second scattered radiation data for the entire inspection surface; The present invention is characterized by comprising a stereoscopic display means for stereoscopically displaying a fluoroscopic image of the subject obtained from the second radiation data in correspondence with the right eye image.

In the second invention, instead of the radiation data collection means in the first invention, the radiation beam scanned on the first scanning plane detects the transmitted radiation transmitted through the object to be inspected, and Outputting first radiation data for the entire inspection surface, detecting transmitted radiation transmitted by the radiation beam scanned on the second scanning surface through the object to be inspected, and outputting second transmitted radiation data for the entire inspection surface. The apparatus is characterized by comprising a radiation data collection means.

[0011] In the third invention, there is provided a radiation generating means for generating radiation, a radiation beam scanning means for collimating the radiation generated by the radiation generating means into a radiation beam that is scanned over the entire object to be inspected, and a transmitted radiation data collection means for detecting radiation transmitted through the object to be inspected by the radiation beam scanned by the beam scanning means and outputting transmitted radiation data; A scattered radiation data collection means that detects radiation scattered from the body and outputs scattered radiation data, a transmitted radiation image obtained from the transmitted radiation data collection means, and a scattered radiation image obtained from the scattered radiation data collection means are combined. The apparatus is characterized by comprising an image display means for displaying an image, and an image moving means for moving a scattered radiation image relative to a transmitted radiation image displayed by the image display means.

0012

[Embodiment] An embodiment of the present invention will be explained with reference to the drawings. FIGS. 1 and 2 show the configuration of a first embodiment of the first and second inventions.

In the figure, an X-ray tube 1 and an X-ray controller 1 are shown.
3, and a fixed collimator 1 made of a lead plate with a rectangular hole.
4, a rotating collimator 15 made of a lead alloy cylinder provided with three spiral slits, a motor 16 that rotates the rotating collimator about the cylindrical axis, and an encoder 17 that outputs a digital signal according to the rotation angle. A more flying spot shaped pencil X-ray beam 18 is created. The conveyor 8 is installed so that the object 7 to be inspected moves within the pencil X-ray beam 18 .

The scattered X-ray detector 19 is connected to the conveyor 8 and the rotating collimator 15 so as to detect Compton scattered X-rays 20 generated when the pencil X-ray beam 18 hits the object 7 to be inspected.
It will be installed between. The scattered X-ray detector 19 consists of a scintillator that converts X-rays into visible light and a photomultiplier that converts visible light into electric current, as in the conventional case.

The output of the scattered X-ray detector 19 is input to a scattered X-ray data collector 22 . Scattered X-ray data collector 22
The scattered X-ray detector 1 is synchronized with the signal from the encoder 17 which outputs a signal corresponding to the rotation angle of the rotating collimator 15.
The output of 9 is AD converted and a digital image signal is sent to the stereoscopic display 23.

The output of the transmission X-ray detector 21 is input to a transmission X-ray data collector 24 . Transmission X-ray data collector 24
sends a digital image signal to the stereoscopic display 25 in the same way as the scattered X-ray data acquisition device 22 described above.

The stereoscopic displays 23 and 25 receive digital image signals and perform stereoscopic display. Each stereoscopic display device 23, 25 is composed of a buffer memory 26, an image selection circuit 27 for sorting between an image on the first scanning plane and an image on the second scanning plane, an image memory 28, and a stereoscopic display 29. A method for stereoscopically displaying scattered X-ray images in the first embodiment configured in this way will be described.

In FIG. 2, X-rays are emitted from an X-ray tube 1, and the X-rays pass through an opening of a fixed collimator 14 to form a fan-shaped X-ray beam with a rectangular cross section. This fan-shaped X-ray beam further passes through a rotating collimator 15 having three spiral slits and becomes a flying spot-shaped pencil X-ray beam 18.

2 and 3, scanning of the flying spot pencil X-ray beam 18 will be explained. This figure is a sectional view on a horizontal plane, and FIG. 3(a) is a diagram at the moment when the flying spot pencil X-ray beam 18 crosses the horizontal plane while scanning the first scanning plane 301 from top to bottom. It can be seen that as the rotating collimator 15 rotates, the pencil X-ray beam 18 passing through the spiral slits 15b and 15c is scanned from top to bottom.

When the rotating collimator 15 further rotates, the slits 15a and 15c become the pencil X-ray beam 18.
, which scans the second scanning plane 302 from top to bottom. FIG. 3(b) is a diagram at the moment when the horizontal plane is crossed. During one rotation of the rotary collimator 15, the first scanning plane 301 and the second scanning plane 302 are alternately scanned three times (three lines) each.

In FIG. 2, the scanned flying spot pencil X-ray beam 18 strikes the object 7 to be inspected and generates Compton scattered X-rays 20. Compton scattering
The rays 20 are emitted in all directions, but some of them are incident on the scattered X-ray detector 19 and detected.

In FIG. 4, the vertical axis shows the output of the scattered X-ray detector 19 during one rotation of the rotating collimator 15, and the horizontal axis shows time. 311 is the output of the scattered X-ray detector 19 when scanning the first scanning plane 301, and 312 is the output of the scattered X-ray detector 19 when scanning the second scanning plane 302. As scanning continues, the scattered X-ray detector 19
continues to produce output like this. Next, the data sampling method will be explained.

In FIG. 2, the subject 7 is transported by the conveyor 8.
When the beam is scanned while continuously sending the X-ray beam at a speed slower than the scanning speed of the beam, the object 7 to be inspected is raster-scanned alternately in two scanning planes by the flying spot pencil X-ray beam 18.

The output of the scattered X-ray detector 19 is sent to a scattered X-ray data collector 22 . Scattered X-ray data collector 2
2 is sampled by a digital signal synchronized with the rotation angle of the rotary collimator 15 from the encoder 17 and converted into a digital quantity.

Sampling is performed using a pulse signal from the encoder 17 indicating a rotation angle of 0° and a pulse signal every 0.1 degree. Sampling starts at a rotation angle of 0°, samples are taken every 0.1°, and approximately 3,500 samplings are performed for an angle slightly less than one rotation. Each sampled data is changed to digital data, and this is treated as one section (one rotation) of data. Approximately 3500 of the next 1 division with the next rotation angle 0° signal
sampling is performed. The digital data obtained by one sampling is sent to the stereoscopic display 23 and then to the buffer memory 26 before the next sampling starts.

The buffer memory 26 stores one section of data (1
It has a capacity that can store 1 section of data sent one after another from the beginning of the memory.

When data collection for one section (for one rotation) is completed, the next section begins, so the image selection circuit 27
are the digital data corresponding to the output of the scattered X-ray detector 19 while scanning the first scanning plane 301 and the output of the scattered X-ray detector 19 while scanning the second scanning plane 301. Buffer memory 26 for sorting digital data
from there to the image memory 28. At this time, the digital data on the first scanning plane 301 is the left-eye image, and the second
The digital data on the scanning plane 302 is a right eye image,
Since each scan is performed three times, the image data is arranged in three lines in each of the right-eye image memory area and the left-eye image memory area in the image memory 28.

Next, when data collection for one section (for one rotation) begins, the contents of the buffer memory 26 are updated one after another with new values from the beginning, and when it is finished, the data from the previous section is updated until the next section starts. Similarly, the images are selected by the image selection circuit 27 and transferred from the buffer memory 26 to the image memory 28. At this time, the data is stored in the memory location for the next three lines after the memory location for the previous three lines.

[0029] In this way, one section after another (one rotation)
When data collection is performed, an image for stereoscopic display is created on the image memory 28 in which vertical lines of right-eye images and left-eye images are arranged alternately. Next, the three-dimensional display will be explained with reference to FIG. FIG. 5 is a cross-sectional view of the liquid panel 32 made up of a two-dimensional matrix of pixels of the stereoscopic display 21, viewed from above.

The stereoscopic display image is displayed on the liquid crystal panel 32 with a two-dimensional pixel matrix, and the right eye image and the left eye image are each displayed on the right eye display pixels 3 arranged alternately in vertical lines.
3R, and will be displayed on the left eye display pixel 33L. A cylindrical lens plate 34, which is a well-known three-dimensional display means and is a collection of cylindrical lenses arranged vertically, is attached to the front surface of the liquid crystal panel 32. When you look at the liquid crystal panel from a suitable distance, you can see that the right eye display pixel 33R and the left eye display pixel 33L, which have parallax through a cylindrical lens, are visible to the right eye 3.
5R, left eye 35L allows binocular viewing, allowing you to see the screen three-dimensionally.

The method for displaying a transmitted X-ray image three-dimensionally in this first embodiment displays a three-dimensional image of the transmitted X-ray image of the object to be inspected 7 through the same operation as the method for three-dimensionally displaying a scattered X-ray image described above. .

Further, as an application example of the first embodiment, it is possible to combine a stereoscopic image based on a scattered X-ray image and a stereoscopic image based on a transmitted X-ray image, and view both stereoscopic images on one screen. Using the liquid crystal panel and cylindrical lens plate of a color liquid crystal television, for example, a three-dimensional image is created using a scattered X-ray image in green, and a three-dimensional image is created using a transmitted X-ray image in red, and both are viewed simultaneously on one screen. This makes it possible to understand the mutual relationship between the three-dimensional image based on the scattered X-ray image and the three-dimensional image based on the transmitted X-ray image, and the internal structure of the object to be inspected can be easily understood.

Note that the same effects as in the first embodiment can be obtained by using other color lenses, polarized lenses, liquid crystal lenses, etc. in place of the cylindrical lens plate 33 as a means for stereoscopic display. can.

According to this first embodiment, by displaying the scattered X-ray image and the transmitted X-ray image of the object 7 to be examined three-dimensionally, the interior of the object 7 to be examined can be viewed three-dimensionally. Therefore, the internal structure of the inspected object 7 can be easily understood. Since two flying spot pencil X-ray beams 18 can be created with one X-ray tube 1, only one X-ray tube 1 is required. Three-dimensional images using scattered X-ray images can detect plastic bombs, drugs, agricultural products, etc. that could not be detected using transmitted X-ray images, and can be accurately inspected in a short time.

Since the cylindrical rotating collimator 15 with three spiral slits is used, the distance between the two flying spot pencil X-ray beam scanning planes can be shortened, and a three-dimensional image can be obtained with a natural perspective. Further, wasteful scanning can be reduced. Furthermore, since the moment of inertia of the rotating part is smaller than that of a conventional rotating disk, there is an advantage that mechanical vibration noise can be reduced.

In the image selection circuit 27, the buffer memory 26
Since the data from the camera is sorted and rearranged into data for right-eye images and data for left-eye images, alignment of right-eye images and left-eye images, etc. can be easily performed. This is the image selection circuit 27
Due to constant change. Specifically, the data is stored in the image memory 28.
Align by changing the memory start address when transferring to. Next, an embodiment according to the third invention will be described with reference to the drawings. The configuration of this embodiment is the same as the configuration of the conventional apparatus shown in FIG. 11 except for the image display device 13, and the same components are denoted by the same reference numerals and the description thereof will be omitted.

In FIG. 6, the red image memory 37R
and green image memory 37G, and DA converters 38R and 38 that convert digital image signals to analog image signals.
an address control unit 39 that performs address switching for sequentially reading data from the G and image memory; a synchronization signal generation unit 40 that sends switching timing and switching reset timing signals to the address control unit 39; and a synchronization signal generation unit 40 that also sends a synchronization signal; The CRT 41 receives a synchronizing signal from a synchronizing signal generating section 40 and displays a color image, and a shift section 42 shifts the image.

The shift section 42 consists of a transmitting section 421 and an AD converter 422 connected thereto, and is configured to send an image display start address signal to the address control section 39. The operation of the embodiment configured in this way will be explained.

When the operator feels that the scattered X-rays and the transmitted X-rays overlap on the screen of the CRT 41 and it is difficult to distinguish them, he turns on the switch of the oscillator 421 of the shift section 42 (
(Switches are omitted in the drawing). Oscillator 421
starts oscillating and sends an analog signal with a period of about 1/2 second that increases and decreases in a sine wave type to the AD converter 422. The AD converter 422 converts the Masahiro signal into a digital signal and sends it to the address control section 39.

The address control section 39 is connected to the synchronization signal generation section 4.
CRT to which the switching reset timing signal is input from 0
The address is returned to the display start address position corresponding to the upper left of the screen of 41. Then, each time a switching timing signal is input from the synchronization signal generation section 40, the AD converter 4
According to the value of the digital signal from 22, the position of display start address 37GS (read start address position) is skipped from the start address position, and data is read out one after another in a raster pattern from that address position toward the lower right of the screen. .

In this manner, the reading start address position of the green image memory 37G is changed in accordance with the value of the digital signal that changes into a sinusoidal waveform from the AD converter 422.

FIG. 7 shows the red image memory 37R and the green image memory 37G, and the display area 3 of the green image memory 37G is displayed using a sine signal from the AD converter 422.
The green display start address 37GS, which is the upper left address of 7GA, is a sine wave type and vibrates at a period of about 1/2 second, and is read from the green image memory 37G and DA.
The converter 38G converts it into an image signal and displays it on the CRT 41. The green scattered X-ray image is a sine wave type, with a period of about 1
/ Vibrates in 2 seconds. On the other hand, the red transmitted X-ray image does not vibrate. Therefore, the operator can distinguish and recognize the superimposed fluoroscopic images even though they overlap. When the operator turns off the switch of the oscillator 421, the vibration of the scattered X-ray image on the screen of the CRT 41 stops and the image returns to the original still image.

According to this embodiment, the scattered X-ray image and the transmitted X-ray image
Even though the line images overlap, they can be distinguished and recognized. Since two types of images can be distinguished while being overlapped, only one screen on the CRT 41 is required. The vibration can be turned on and off by the operator's operation, making it easy to operate. Even when the two types of images are overlapped, the distinction can be clearly made by both color and movement. As a second embodiment, as shown in FIG. 3, a shift section 45 consisting of an oscillator 43 and a signal delay circuit 44 may be used as the shift means. To vibrate the screen, instead of changing the display start address, a signal delay circuit 44 is used for the analog green signal G, and the delay amount is vibrated in a sine wave type.

Furthermore, the shift section 45 does not generate the shift amount in the form of a sine wave using an oscillator as in the above embodiments, but as a third embodiment, as shown in FIG. , 47 may be provided with a shift portion 48 that produces a shift amount proportional to the amount of operation.

Furthermore, as shown in FIG. 10, a fourth embodiment is an apparatus that creates scattered X-ray images from two directions on the object 7 to be inspected. It can also be applied to the case where the front side scattered X-ray image and the back side scattered X-ray image are displayed in green and blue on the image display 50, respectively.

Furthermore, the present invention can also be applied to the case where a transmitted X-ray image is created and displayed in red overlay. In this case, the images are threefold, but the three images can be distinguished and recognized by changing the direction of vibration, for example, vibrating vertically for the green image and vibrating horizontally for the blue image, or by changing the amplitude of the vibration.

[0047]

According to the present invention, it is possible to easily understand the three-dimensional structure of an object to be inspected, so it is possible to provide a radiographic inspection apparatus with high inspection accuracy.

[Brief explanation of the drawing]

[Fig. 1] X which is an embodiment according to the first invention and the second invention
It is a block diagram of a line inspection device.

FIG. 2 is a plan cross-sectional view of FIG. 1;

FIG. 3 is an explanatory diagram of the operation of the embodiment.

FIG. 4 is a diagram showing the scattered X-ray detector output of the example.

FIG. 5 is an explanatory diagram of the three-dimensional display effect of the embodiment.

FIG. 6 is a block diagram of the image display device of the first embodiment according to the third invention.

FIG. 7 is an explanatory diagram of the operation of the first embodiment according to the third invention.

FIG. 8 is a block diagram of a screen display device of a second embodiment according to the third invention.

FIG. 9 is a block diagram of a shift section of a third embodiment according to the third invention.

FIG. 10 is a configuration diagram of an X-ray inspection apparatus according to a fourth embodiment of the third invention.

FIG. 11 is a configuration diagram of a conventional X-ray inspection apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1...X-ray tube, 2...Conical X-ray beam, 3...Fixed collimator, 4...Fan-shaped X-ray beam, 5...Rotating collimator, 6...Pencil X-ray beam, 7...Object to be inspected, 8...Conveyor, 9...
Transmission X-ray detector, 10...Scattered X-ray detector, 11...Transmission X
Ray data collector, 12...Scattered X-ray data collector, 13...
Image display device, 14... Fixed collimator, 15... Rotating collimator, 15a, 15b... Spiral slit, 16... Motor, 17... Encoder, 18... Pencil X-ray beam, 1
9...Scattered X-ray detector, 20...Compton scattered X-ray, 21
...Transmission X-ray detector, 22...Scattered X-ray data collector, 23
... Stereoscopic display, 24... Transmission X-ray data collector, 25... Stereoscopic display, 26... Buffer memory, 27... Image selection circuit, 28... Image memory, 29... Stereoscopic display,
301...first scanning plane, 302...second scanning plane, 3
11, 312... Output of scattered X-ray detector, 32... Liquid crystal panel, 33R... Right eye display pixel, 33L... Left eye display pixel, 34... Cylindrical lens plate, 35R...
Right eye, 35L...Left eye, 36...Image display, 37R...
Image memory for red, 37G... Image memory for green, 37
R, 37G...Display area, 37RS, 37GS...Display start address, 38R, 38G...DA converter, 39...Address control section, 40...Synchronization signal generation section, 4
1... CRT, 42... Shift section, 421... Transmission section, 42
2... AD converter, 43... Transmission section, 44... Signal delay circuit, 45... Shift section, 46, 47... Potentiometer, 48... Shift section, 49... Data collector, 50... Image display device.

Claims (3)

[Claims] Claim 1: Radiation generating means for generating radiation;
A radiation beam that collimates the radiation generated by the radiation generating means into a radiation beam that is irradiated onto the object to be inspected by alternately scanning a plurality of fan-shaped scanning planes that are approximately parallel to each other with the radiation source of the radiation generating means as the apex. a scanning means;
Scattered radiation scattered from the object to be inspected is detected by the radiation beam scanned on the scanning plane of A radiation data collection means that detects scattered radiation scattered from the object to be inspected and outputs second radiation data for the entire inspection surface, and a fluoroscopic image of the object to be inspected obtained from the first radiation data corresponding to a left eye image. a 3D display means for stereoscopically displaying a fluoroscopic image of a subject to be inspected obtained from second radiation data in correspondence with a right eye image. 2. Instead of the radiation data collection means in claim 1, the radiation beam scanned on the first scanning surface detects the transmitted radiation transmitted through the object to be inspected, and collects the first radiation data for the entire inspection surface. A radiation beam scanned on a second scanning surface has a radiation data collection means for detecting transmitted radiation transmitted through an object to be inspected and outputting second transmitted radiation data for the entire inspection surface. Fluoroscopic inspection equipment. [Claim 3] Radiation generating means for generating radiation;
A radiation beam scanning means that collimates the radiation generated by the radiation generating means into a radiation beam that is scanned over the entire object to be inspected; A transmitted radiation data collection means detects the transmitted radiation and outputs transmitted radiation data, and the radiation beam scanned by the radiation beam scanning means detects the radiation scattered from the inspected object and outputs the transmitted radiation data. a scattered radiation data collection means for outputting radiation data; an image display means for synthesizing and displaying a transmitted radiation image obtained from the transmitted radiation data collection means and a scattered radiation image obtained from the scattered radiation data collection means; A radiographic inspection apparatus comprising an image moving means for moving a scattered radiation image relatively to a transmitted radiation image displayed by a display means.