JP2000014664A - X-ray diagnostic apparatus and radiation diagnostic apparatus - Google Patents

Abstract

(57) [Summary] [Problem] It is possible to flexibly image a desired part,
In addition, a good image can be obtained by correcting a position shift due to the bending of the support member. SOLUTION: The magnetism generated from a transmitter is received by a receiver, and the received signal is input to a position calculation unit of an image processing unit. The position calculation unit calculates the actual positions of the X-ray generation unit and the X-ray detection unit from the input signal, and outputs the calculated positions to the shift amount calculation unit. The shift amount calculation unit receives the original position data of the X-ray generation unit and the X-ray detection unit from the control unit, calculates the shift amount from the actual position, and outputs it to the reconstruction unit. When constructing a three-dimensional photographed image based on the X-ray detection data obtained from the X-ray detection unit, the reconstruction unit reconstructs the photographed image by performing correction in consideration of the above-described shift amount. Images can be obtained. In addition, the C-arm type allows flexible imaging of a desired portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open-type X-ray diagnostic apparatus and a radiation diagnostic apparatus such as a C-arm type, and more particularly to a structure for correcting a position shift due to bending of an arm.

[0002]

2. Description of the Related Art Conventionally, an X-ray diagnostic apparatus for a circulatory organ is used to reconstruct projection data acquired by scanning a subject from multiple directions to generate a three-dimensional reconstructed image of the subject. Inspection and treatment methods have been performed while observing an object. As a cardiovascular X-ray diagnostic device, C
It is roughly classified into two types: a T-like gantry type (hereinafter, referred to as a gantry type) and an open type having a C-shaped arm (hereinafter, referred to as a C-arm type).

In the former, an X-ray generation unit and an X-ray detection unit are fixed to a ring-shaped frame so as to face each other. This type is a floor-standing type, and is covered like a CT in appearance. The ring frame is fixed to the floor so that the ring can rotate (equivalent to the latter slide) and can be turned up and down (equivalent to the latter spindle rotation). Then, rails are provided on the floor to enable horizontal movement in one direction. The reconstructed image is generated by obtaining projection data by ring rotation and back-projecting them.

[0004] In the latter, an X-ray generating unit and an X-ray detecting unit are fixedly held at both ends of a C-shaped arm so as to face each other. The C-shaped arm is slidably held by a holder, and the holder is rotatably held by a column, and the column is rotatably mounted on a ceiling or floor. C on the support
In some cases, a mechanism for raising and lowering the mold arm is provided.
In the ceiling suspension type, a rail is provided on the ceiling, and horizontal movement in one direction or two directions is possible. The reconstructed image acquires projection data by slide or spindle rotation,
They are generated by backprojecting them.

[0005]

The gantry-type device described above has a ring-shaped frame as a holding device for the X-ray generation unit and the X-ray detection unit, so that it is an open type such as a C-arm. The ring can be rotated while the amount of deflection of the frame is kept small. For this reason, an artifact due to a positional shift between the X-ray generation unit and the X-ray detection unit can be reduced. In addition, since it is easy to balance the ring rotation and perform high-speed rotation like CT, there is an advantage that the influence of the body movement of the subject can be suppressed to a small level.

However, the first condition of the X-ray diagnostic apparatus for a circulatory organ is that a desired fluoroscopic image can be obtained in real time from various directions, and the gantry type has difficulty in this point. Even in normal fluoroscopy, the subject is placed in a cylindrical hole in the center of the gantry and fluoroscopy is performed on the region of interest.However, basically, only the body axis direction can be accessed, and the accessibility to the subject is poor. is there. The ring rotation RAO / LAO can take a large stroke, but the tilting operation CRA / CAU cannot take a necessary angle due to the device configuration.

For this reason, there is a case where a desired blood vessel image cannot be taken from an angle where blood vessels do not overlap with each other. Also, the imaging system is surrounded by a cover like CT,
Contact imaging cannot be performed, and a favorable image cannot be obtained due to the influence of penumbra. Furthermore, the surgeon has difficulty in accessing the subject in the gantry, checking the condition of the subject,
Communication is also difficult.

[0008] The biggest problem is that the work space required by the operator cannot be obtained. That is, with a gantry type device, a good image with little artifact in the reconstructed image can be obtained relatively easily, but the function as a normal circulatory organ holding device is not sufficient, and it is very difficult to use. there were.

Therefore, in order to avoid the above-mentioned disadvantages, attempts have been made to obtain a reconstructed image using a conventional C-arm type device.

[0010] Unlike the gantry-type ring-shaped device described above, the C-arm type device has an opening, allows access to the subject from multiple directions, and provides a sufficient workspace for the operator. Positioning can be secured.
The CRA / CAU angle can be sufficiently obtained in the craniocaudal direction, and a desired blood vessel can be flexibly followed to perform fluoroscopic imaging.

However, the C-shaped arm has an X-ray generator at both ends,
The X-ray detector has a heavy load, and its rigidity causes some deflection. Although this bending is mainly caused by the C-shaped arm, other bending such as a strut portion is also added.

The amount of deflection varies depending on the positioning of the apparatus. Therefore, when collecting projection data for obtaining a reconstructed image, the X-ray generation unit and the X-ray detection unit deviate from their original positions, and the amount of deviation differs depending on the acquisition angle of each projection data. This displacement causes an artifact in the reconstructed image, which causes a problem that accurate diagnosis and treatment cannot be performed. That is, although the C-arm type device naturally has a sufficient function as a normal circulatory organ holding device, an artifact occurs in a reconstructed image, and a good image which can be used for diagnosis and treatment is obtained. There was a problem that you could not do that.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to flexibly capture an image of a desired portion and to correct a position shift caused by bending of a support member. An object of the present invention is to provide an X-ray diagnostic apparatus and a radiation diagnostic apparatus capable of obtaining a good image.

[0014]

According to a first aspect of the present invention, a radiation generator and a radiation detector are mounted on a support member so as to face each other, and the support section is slid or rotated. In the radiation diagnostic apparatus that scans a subject and reconstructs projection data acquired from the radiation detection unit to generate a reconstructed image of the subject, the radiation generation unit and the radiation detection unit And a reconstructed image generating means for generating a reconstructed image by correcting a positional deviation between the actual position and the originally set original position.

According to the first aspect of the invention, when the radiation generating section and the radiation detecting section are attached to both ends of a support member such as a C-shaped arm and are arranged to face each other, the weight of the radiation generating section and the radiation detecting section causes the supporting member to be supported. The member bends, and the radiation generating unit and the radiation detecting unit are displaced from the originally set positions. When generating a reconstructed image from the detection data obtained from the radiation detection unit, correction is performed in consideration of the displacement, and a reconstructed image is obtained. A three-dimensional reconstructed image with high image quality can be obtained.

A feature of the second invention is that an X-ray generation unit and an X-ray detection unit are attached to a support member so as to be opposed to each other, and the support member is slid or rotated to scan the subject and scan the subject. In an X-ray diagnostic apparatus that reconstructs projection data obtained from an X-ray detection unit to generate a reconstructed image of the subject, the actual positions of the X-ray generation unit and the X-ray detection unit are initially set. There is provided a reconstructed image generating means for generating a reconstructed image by correcting a positional deviation from an originally set position.

According to the second aspect of the invention, when the X-ray generation unit and the X-ray detection unit are attached to both ends of a support member such as a C-shaped arm and are opposed to each other, the X-ray generation unit and the X-ray detection unit Due to the weight, the support member is bent, and the X-ray generation unit and the X-ray detection unit are displaced from the originally set positions. When generating a reconstructed image from the detection data obtained from the X-ray detection unit, by performing a correction taking into account the displacement,
Since the reconstructed image is obtained, no artifact occurs in the reconstructed image, and a three-dimensional reconstructed image with good image quality can be obtained.

According to a third aspect of the present invention, the reconstructed image generating means includes a position detecting means for detecting an actual position of each of the X-ray generating section and the X-ray detecting section, and a position detected by the position detecting means. Calculating means for calculating a difference between the actual position and the set position, and reconstructing means for correcting the acquired projection data based on the difference data calculated by the calculating means to generate a reconstructed image. Have.

According to the third aspect, the three-dimensional actual positions of the X-ray generator and the X-ray detector attached to the support member are detected by a magnetic sensing system or the like. The difference between the actual position and the set positions of the X-ray generation unit and the X-ray detection unit at this time is a displacement amount due to bending of the support member or the like. Therefore, if the projection data acquired from the X-ray detector is corrected in consideration of the amount of displacement, a reconstructed image of good image quality without artifacts is generated.

The reconstructed image generating means according to a fourth aspect of the present invention measures and obtains, in advance, an amount of displacement between an actual position and a set position of each of the X-ray generation section and the X-ray detection section. List data that lists the amount of misalignment for each set position, reading means for reading the amount of misalignment from the list data using the set position as a key, and the amount of misalignment read by the read means. Reconstructing means for correcting the acquired projection data to generate a reconstructed image.

According to the fourth aspect of the present invention, the amount of displacement of the X-ray generation unit and the X-ray detection unit due to bending of the support member is determined by the set position of the X-ray generation unit and the X-ray detection unit. Therefore, the amount of positional deviation between the X-ray generation unit and the actual position of the X-ray detection unit at each set position can be measured in advance and stored as list data. Thereafter, when the X-ray generation unit and the X-ray detection unit are positioned at a set position, a displacement amount at the set position is obtained from the list data, and the projection data is corrected based on the displacement amount, and the artifact is corrected. It is possible to generate a three-dimensional reconstructed image of good image quality without any defect.
It should be noted that the list data may store the actual position for each set position from the beginning, and then calculate the difference between the set position and the actual position at that time to obtain the positional deviation amount.

According to a fifth aspect of the present invention, the position detecting means includes:
The X-ray generator and the X-ray generator, comprising a transmitter for generating magnetism, and a receiver for receiving the generated magnetism.
At least one or more receivers are attached to each of the line detectors.

The reconstructed image generating means, which is a feature of the sixth invention, performs position correction based on the difference data or the amount of displacement for each projection image of projection data when generating a reconstructed image. The support member according to the seventh aspect is partially open.

According to the seventh aspect, if the support member is a C-shaped arm, a part of the support member is opened, and the X-ray generation unit and the X-ray detection unit attached to both ends are opened. The accessibility to the examiner is improved, and for example, a desired blood vessel image can be taken from an angle at which blood vessels do not overlap with each other.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of the X-ray diagnostic apparatus of the present invention. X in this example
The line diagnostic device is a C-arm type device. The X-ray generation unit 1 and the X-ray detection unit 2 are fixed and held opposite to both ends of the C-arm 3. The C-arm 3 is slidably held by a holder 4, and the holder 4 is rotatably held by a support 5 and the support 5 is attached to a ceiling or a floor so that the support can rotate.

Here, a ceiling suspension type is shown. In the ceiling suspension type, a rail is provided on the ceiling, and horizontal movement in one or two directions is possible. Further, the X-ray detection unit 2 can be moved up and down, so that the X-ray detection unit 2 can be brought into close contact with the subject to collect a good image.

FIG. 2 measures the three-dimensional positions of the X-ray generator 1 and the X-ray detector 2 mounted on the X-ray diagnostic apparatus of the present embodiment shown in FIG. 1, and calculates the amount of deviation from the original position. FIG. 3 is a block diagram showing a control system and a processing system for obtaining an image without an artifact by generating a three-dimensional reconstructed image by correcting projection data by displacement. The X-ray diagnostic apparatus is installed in the examination room 20. A transmitter 8 constituting a magnetic sensing system is attached to a wall of the examination room 20, and its receivers 9a and 9b are connected to the X-ray generator 1,
It is attached to the outer wall of the X-ray detector 2.

The entire apparatus is controlled by a control unit 10. The control unit 10 includes a control panel unit 11, which is an interface with an operator, an image processing unit 12, which forms a three-dimensional captured image, and an X-ray of the X-ray generation unit 1. An X-ray emission control unit 13 for controlling the X-ray irradiation and a drive control unit 14 for moving the positions of the X-ray generation unit 1 and the X-ray detection unit 2 by moving the C-arm 3 and the like are connected.

Further, the image processing unit 12 includes the receivers 9a and 9
b, a position calculator 121 for calculating the actual positions of the X-ray generator 1 and the X-ray detector 2 from the received signal, and the position calculator 12
1 based on the position information from the X-ray generation unit 1 and the X-ray detection unit 2 to calculate the amount of positional deviation from the originally set position. It has a reconstructing unit 123 that reconstructs a three-dimensional image from the amount of displacement of the amount calculating unit 124.

Next, the operation of this embodiment will be described. As an X-ray diagnostic apparatus for a circulatory organ, the above-mentioned C-ray diagnostic apparatus is used in view of accessibility to a subject, a workspace of an operator, and the like.
Mold arm type is the mainstream. In recent years, attempts have been made to generate projection images by obtaining projection data by sliding or rotating the spindle while maintaining such advantages, and back-projecting the projection data.

As shown in FIG. 1, at both ends of the C-shaped arm 3, heavy objects of the X-ray generating section 1 and the X-ray detecting section 2 are arranged. Due to its structure, the C-shaped arm 3 is bent. The deflection is C
Deflection of, for example, the column 5 other than the mold arm 3 is also added.
The amount of the deflection changes depending on the position of the C-arm 3.

As a result, the positions of the X-ray generator 1 and the X-ray detector 2 deviate from the original set positions, and if this is left as it is, an artifact will occur in the reconstructed image generated from the obtained projected image. In the example, the above-described problem is solved by correcting the above-described positional deviation as described below.

For this purpose, the displacement between the X-ray generation unit 1 and the X-ray detection unit 2 due to the above-mentioned bending must be measured.
First, a three-dimensional position measurement method of the X-ray generation unit 1 and the X-ray detection unit 2 will be described. As shown in FIG. 2, orthogonal coil receivers 9a and 9b are attached to the X-ray generating unit 1 and the X-ray detecting unit 2 whose three-dimensional positions are to be measured, and the transmitter 8 as an orthogonal coil for generating a magnetic field is attached to the inspection room 20. Fixed installation on a non-moving part such as a wall. The mounting position of the transmitter 8 may be fixed to a gantry portion of a bed if it does not move.

When an alternating current is applied to the transmitter 8, a magnetic field is generated, and this magnetic field induces a current in the receivers 9a and 9b. By detecting the magnitude of this current, it is possible to detect the spatial position and the six degrees of freedom of the angle around the axis. The positions where the receivers 9a and 9b are mounted are preferably on the outer surfaces of the X-ray generator 1 and the X-ray detector 2, respectively. What is actually desired to be measured is the X-ray focal position and the X-ray detection surface position, and the receiver mounting position and their positional relationship must be grasped in advance. X-ray focus (or X
It is appropriate to mount the receivers 9a and 9b on the outer surface where the position of the line detection surface) and the receivers 9a and 9b do not relatively move, that is, where the holding stress is not applied. This position conversion is obtained by performing a simple operation.

It is assumed that the receivers 9a and 9b are not provided on the transmitter 8 side due to the positioning of the holding device, and it is desirable that at least one receiver is provided for each of the X-ray generation unit 1 and the X-ray detection unit 2. If the magnetic sensor as shown here is used, highly accurate position sensing can be performed by the lightweight and compact receivers 9a and 9b and the transmitter 8. In addition, even if there is an intervening substance between the receivers 9a and 9b and the transmitter 8, sensing is possible (however, a magnetic material is excluded). However, the present embodiment is not limited to this, and sensing may be performed using ultrasonic waves or infrared rays.

Next, the correction of the shift amount described above will be described with reference to FIG.
Explanation will be made according to the configuration shown in FIG. The magnetism generated from the transmitter 8 is received by the receivers 9a and 9b, and the received signal is input to the position calculation unit 121 of the image processing unit 12. The position calculator 121 calculates the X-ray generator 1 and X
The actual position of the line detector 2 is calculated, and the calculated position is output to the shift amount calculator 124. The shift amount calculation unit 124 is provided by the control unit 10
The X-ray generation unit 1 and the X-ray detection unit 2 obtain the set position data which should be originally obtained from, calculate the amount of deviation from the actual position, and output it to the reconstruction unit 123. Reconstruction unit 123
When constructing a three-dimensional photographed image based on the X-ray detection data obtained from the X-ray detection unit 2, the photographed image is reconstructed by performing a correction in consideration of the above-described shift amount.

FIG. 3 is a flowchart for explaining the above operation. In step 301, X-ray projection data is obtained by the X-ray detection unit 2, and in step 302, the X-ray generation unit 1 and the X-ray generation unit 3 perform three-dimensional position sensing by the transmitter 8, the receivers 9 a and 9 b, and the position calculation unit 121. The position data of the line detector 2 is obtained. Further, at this time, the control unit 10 notifies the shift amount calculation unit 124 of the original positions (set values) of the X-ray generation unit 1 and the X-ray detection unit 2 in step 303. In step 304, the reconfiguration unit 123 of the image processing unit 12 stores the X-ray projection data from the X-ray detection unit 2 and the position data obtained by three-dimensional position sensing.

In step 305, the shift amount calculating unit 124 calculates the position shift amount (difference data) between the actual position data based on the three-dimensional position sensing and the set position data notified from the control unit 10. And the reconstruction unit 12
Enter 3 Thereby, the reconstruction unit 123 calculates the corrected projection data by performing the correction in consideration of the positional deviation amount in Step 306, and in Step 307, calculates the three-dimensional image whose positional deviation has been corrected by the corrected projection data. A reconstructed image is created.

Next, the method of correcting the above-described positional deviation will be described more specifically. The original spatial position of the X-ray focal point (or X-ray detection plane) is (X, Y, Z), the angle around its axis is (θx, θy, θz), and the X-ray focal point (or X-ray detection plane) (P, Q,
R), and angles around the axis (θp, θq, θr).

Here, if the X-ray focal point (or X-ray detection plane) is shifted in the X direction (X-ray irradiation direction) to collect the X-ray projection image, the magnification is different from that of the other projection images. Artifacts occur in the reconstructed image. This correction is performed by shifting the X-ray focal position (or X-ray detection surface) from the original position (P
The correction of the magnification of the projected image corresponding to -X) and the density correction of the difference between the X-ray detector arrival doses may be performed if necessary. X
If the line focus position (or X-ray detection surface) is shifted in the Y direction or Z direction (a direction parallel to the detection surface), the projection image is moved and corrected to (QY) or (RZ). Artifacts do not occur if reconstructed.

The emission angles from the X-ray focal point are θp, θq, θ
Even if the angle r is shifted in any angular direction, the projected image is affected only by the spatial intensity distribution of the X-rays, and no artifact occurs if the intensity distribution is assumed to be uniform. Therefore, X
Line focus angle (θp, θq, θr) data need not be collected. When the angles of the X-ray detection surface are θp, θq, and θr, (θp−θx), (θq−θy), (θr
By performing rotation correction of −θz) and reconstructing, a good reconstructed image without artifact can be obtained.

According to this embodiment, the X-ray generator 1 and the X-ray generator 1 are bent by the deflection of the C-arm 3, the support 5, etc. from the set position (the original position) set by the controller 10.
When the position of the line detector 2 is displaced, the displacement of the X-ray generator 1 and the X-ray detector 2 from the originally set positions is corrected using the displacement detected by the three-dimensional sensing to perform three-dimensional reconstruction. Since an image is formed, a good three-dimensional reconstructed image without artifacts can be obtained, and the accuracy of diagnosis and treatment can be improved. Moreover, since the holding device is an open type device having the C-arm 3, it is possible to flexibly image a desired portion.

As a result, it is possible to three-dimensionally observe the travel of a complicated blood vessel, perform examination and treatment while three-dimensionally grasping a blood vessel stenosis or aneurysm, and perform diagnosis and procedures reliably and efficiently. Will be able to do it.

In this embodiment, since the actual positions of the X-ray generator 1 and the X-ray detector 2 are detected by the position sensing system, even if the amount of deflection of the C-arm 3 changes due to aging, Accordingly, a reconstructed image with high accuracy can always be obtained.

FIG. 4 is a block diagram showing a second embodiment of the X-ray diagnostic apparatus according to the present invention. This example does not have a three-dimensional sensing system, but instead measures the amount of deflection according to various positionings of the X-ray generation unit 1 and the X-ray detection unit 2 in advance, and uses this as table data. It differs from the first embodiment shown in FIG. 1 in that it is stored in a memory 125, and is otherwise the same.

Therefore, the shift amount calculating section 1 of the image processing section 12
Reference numeral 24 reads the set position notified from the control unit 10 and the amount of deviation of the set position due to bending from the table data in the memory 125, and outputs this to the reconfiguration unit 123.
As a result, the reconstructing unit 123 is caused by the X-ray generation unit 1 due to the bending.
And a three-dimensional image in which the displacement of the X-ray detector 2 has been corrected.

FIG. 5 is a flowchart for explaining the above operation. In step 501, projection data is obtained by the X-ray detection unit 2, and in step 503, position data is obtained from table data in the memory 125.
Further, at this time, in step 503, the control section 10 obtains the data (the set value) that the X-ray generation section 1 and the X-ray detection section 2 should have. In step 504, the reconstruction unit 123 of the image processing unit 12 stores the projection data and the position data.

In step 505, the shift amount calculation unit 124 uses the table data in the memory 125 to
The position shift amount at the set position which should be originally known from is obtained and input to the reconstruction unit 123. This allows
The reconstruction unit 123 performs correction in consideration of the displacement amount to calculate corrected projection data. In step 507, a three-dimensional reconstructed image in which the displacement is corrected by the corrected projection data is created. The same effect as that of the embodiment can be obtained, but the configuration can be simplified because there is no three-dimensional sensing device.

In the first and second embodiments, examples have been described in which the present invention is applied to an X-ray diagnostic apparatus.
The radiation applied to the subject is not limited to X-rays, but may be, for example, γ-rays, and similar effects can be obtained by applying the present invention.

[0050]

As described above in detail, according to the present invention, it is possible to flexibly capture an image of a desired part, and to obtain a good image by correcting the positional displacement due to the bending of the support member. As a result, it is possible to three-dimensionally observe the travel of complicated blood vessels, and to perform examination and treatment while grasping blood vessel stenosis and aneurysm three-dimensionally, thereby making diagnosis and procedures reliable and efficient. Will be able to do it.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of an X-ray diagnostic apparatus according to the present invention.

FIG. 2 is a block diagram showing a configuration example of obtaining a reconstructed image by the X-ray diagnostic apparatus shown in FIG.

FIG. 3 is a flowchart illustrating an operation of the device illustrated in FIG. 2;

FIG. 4 is a block diagram showing a main part of a second embodiment of the X-ray diagnostic apparatus of the present invention.

FIG. 5 is a flowchart illustrating an operation of the device illustrated in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 X-ray generation part 2 X-ray detection part 3 C-arm 4 Holder 5 Prop part 8 Transmitter 9a, 9b Receiver 10 Control part 11 Control panel part 12 Image processing part 13 X-ray exposure control part 14 Drive control part 20 Inspection room 121 position calculation unit 123 reconstruction unit 124 shift amount calculation unit 125 memory

Claims (7)

[Claims] 1. A radiation generation unit and a radiation detection unit are attached to a support member to be opposed to each other, and slide or rotate the support unit to scan a subject and obtain projection data obtained from the radiation detection unit. In the radiation diagnostic apparatus that generates a reconstructed image of the subject by reconstructing, the position deviation between the actual position of the radiation generating unit and the radiation detecting unit and the originally set original position should be corrected. A radiation diagnostic apparatus comprising a reconstructed image generating means for generating a reconstructed image by means of a reconstructed image. 2. An X-ray generation unit and an X-ray detection unit are attached to a support member and arranged to face each other, and by sliding or rotating the support member, a subject is scanned and obtained from the X-ray detection unit. An X-ray diagnostic apparatus for reconstructing the projection data obtained to generate a reconstructed image of the subject, wherein the actual position of the X-ray generation unit and the X-ray detection unit and the originally set original position and An X-ray diagnostic apparatus comprising: a reconstructed image generating means for generating a reconstructed image by correcting a positional deviation of the image. 3. The reconstructed image generating means includes: a position detecting means for detecting an actual position of each of the X-ray generating part and the X-ray detecting part; and an actual position detected by the position detecting means. Calculating means for calculating a difference from the set position; and reconstructing means for correcting the acquired projection data based on the difference data calculated by the calculating means to generate a reconstructed image. The X-ray diagnostic apparatus according to claim 2, wherein 4. The reconstructed image generating means measures in advance the amount of positional deviation from an actual position with respect to each set position of the X-ray generating unit and the X-ray detecting unit, and calculates the amount of positional deviation obtained. List data listing each set position; reading means for reading the amount of displacement from the list data using the set position as a key; and the projection data obtained based on the amount of displacement read by the read means. 3. A reconstructing means for compensating for and generating a reconstructed image.
X-ray diagnostic device. 5. The X-ray generator and the X-ray generator, comprising: a transmitter for generating magnetism; a receiver for receiving the generated magnetism; and means for obtaining three-dimensional position information from an output of the receiver. The X-ray diagnostic apparatus according to claim 3, wherein at least one or more receivers are attached to each of the line detectors. 6. The reconstructed image generating means, when generating a reconstructed image, performs position correction on the basis of the difference data or the amount of displacement for each projection image of the projection data. 6. The X-ray diagnostic apparatus according to any one of claims 5 to 5. 7. The X-ray diagnostic apparatus according to claim 2, wherein a part of the support member is open.