JPH01280444A - X-ray ct scanner device - Google Patents

Abstract

PURPOSE:To secure the space for arrangement of an apparatus for inspection and remedy, and simultaneously, to efficiently execute a diagnosis by obtaining a recomposing image as to a surface prepared between an X-ray source and a multichannel X-ray detector based on X-ray transmission data from many directions obtained from the exposing radiation of the X-ray in rotating a U-shaped arm and using it for the diagnosis of a subject. CONSTITUTION:A subject P gets on a top board, and he is lifted. Next, the top board is made to advance (a scannogram is photographed according to a necessity), and a necessary diagnostic part is made to approach a part corresponding to a main body gantry. On the other hand, the whole of a supporting body 12, a rotating mechanism 13 and a U-shaped arm 14 is made to attain to the necessary photographing part of the subject P by driving a traveling base 11. Thus, the locating of the photographing is completed, and in an operation room, an operator operates a console, he pushes a photographing switch, the rotating mechanism 13 is rotated, simultaneously, the X-ray is expose-radiated from an X-ray source 15, a data collection is executed by a data collector, the sliced image of the above-mentioned photographing part is prepared, and it is displayed. Since both of the part corresponding to the main body gantry and the subject P can be made to approach and separate at the time of photographing, the arrangement space of the apparatus for the check and remedy can be secured at the time of special inspecting and remedying.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an X11 CT scanner device, and particularly to an X-ray CT scanner device with an improved main body configuration.

(Prior Art) As a basic configuration of this type of X-ray CT scanner device, for example, in the device shown in FIG. 4, a main body gantry 1 including an X-ray source and a multi-channel X-ray detector; It is composed of an elevating bed 2 having a sliding top plate, a control/data processing system (not shown) including a power source, and a console 3.

In this case, the main body gantry 1 and the elevating bed 2 are installed on the floor inside the examination room, and the control/data processing system and console 3 are generally installed in an operation room outside the examination room.

The diagnostic procedure is performed as follows.

That is, with the elevating bed 2 lowered and the top board retracted, the subject gets on the top board and then raises it. Next, the top plate is advanced, a scanogram is taken as necessary, and the desired diagnosis site is brought to the imaging position of the main body gantry 1. In this case, the main body gantry 1 is tilted toward the front or the other side.

As a result, the imaging positioning is completed, and the operator operates the console 3 in the operation room and presses the imaging switch, data is collected, and a slice image of the diagnosis area is generated. The image will be displayed on the monitor. After this, if another part or re-imaging is necessary,
The same procedure as above is carried out, and when the imaging is completed, the top plate of the elevating bed 2 is evacuated and lowered, and the subject gets off the top plate.

(Problem to be Solved by the Invention) As described above, in the conventional X-ray CT scanner device, the main body gantry 1 and the elevating bed 2 are installed on the floor of the examination room, and the main body gantry 1 is located at a fixed position. On the other hand, since it is configured to introduce only the subject, problems may occur in the following cases. That is,
In the case of circulatory system diseases, treatment may be performed following diagnosis, and in such cases, there may be no problem with diagnosis because the main body gantry 1 and the elevating bed 2 are installed close to each other. Even if there is a special test or treatment that will continue to be carried out, it will not be possible to secure space for the equipment for the test or treatment.
In addition, space-related problems may arise, such as the inability to secure a working space.

In addition, the area to be imaged is set inside the main body gantry 1, which is not very visible from the outside, and the patient is exclusively introduced into the main body gantry 1, which is in a fixed position. It is not easy to position the diagnosing system, which poses a problem in terms of diagnostic efficiency.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an X-ray CT scanner device that can secure a space for arranging instruments for examination and treatment and can perform diagnosis efficiently.

[Structure of the Invention] (Means for Solving the Problems) The present invention has a structure in which the following means are taken to solve the above problems and achieve the objects.

That is, the present invention includes a base fixed to the ceiling of an examination room, a traveling base that can run on the base, a support provided hanging down from the traveling base, and a base provided at the hanging end of the support. A rotation mechanism provided, a U-shaped arm having a connecting portion fixed to the rotation axis of the rotation mechanism, and an X-ray source and a multichannel X-ray detector provided at the ends of the U-shaped arm. , X-ray transmission data from multiple directions obtained by placing the subject in a space facing the X-ray source and the multi-channel X-ray detector and exposing the patient to X-rays while rotating the U-shaped arm. Based on this, a reconstructed image of the plane formed by the X-ray source and the multi-channel X-ray detector is obtained and used for diagnosis of the subject.

(Function) According to such a configuration, the portion corresponding to the conventional main body gantry includes a U-shaped arm that supports an X-ray source and a multi-channel X-ray detector, and a support that supports this U-shaped arm. and a traveling base to which this support is fixed, and since the part corresponding to the main body gantry can run on the base, the part corresponding to the main body gantry and the elevating bed can be brought close to each other or separated from each other. can also be easily done. Therefore, by separating them, it is possible to secure the placement space and work space for instruments for examination and treatment, and in the area corresponding to the main body gantry, the imaging site can be set with good visibility from the outside. Positioning of the site is easy and diagnostic efficiency can be improved.

(Embodiment) An embodiment of the X-ray CT scanner device according to the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a perspective view showing the structure of a portion corresponding to the main body gantry in the same embodiment, and FIG. 2 is a block diagram showing the structure of the electrical system in the same embodiment.

As shown in Figure 1, the base 1 is fixed to the ceiling of the examination room.
A traveling base 11 is provided on the base 10 and is movable in the longitudinal direction of the base 10, that is, in the direction A in the figure, by a drive mechanism that is either internally installed or not shown. A support body 12 is supported by hanging from the traveling base 11. This support body 12 is provided internally or is capable of expanding and contracting in the longitudinal direction of the support body 12, that is, in the direction B in the figure, by a drive mechanism (not shown).

Further, a rotation mechanism 13 is provided at the hanging end portion of the support body 12. This rotation mechanism 13 is equipped internally or uses a drive mechanism (not shown) to rotate its rotation shaft 13a.
It is possible to rotate in the direction C shown in the figure at a speed corresponding to data collection. A connecting portion 14a of a U-shaped arm 14 is fixed to the rotating shaft 13a, an X-ray source 15 is fixed to the end of one arm 14b1, and an arc-shaped polygon is fixed to the end of the other arm 14b2. A channel X-ray detector 16 is fixed. Here, one arm 14b1
The space between the arm 14b2 and the other arm 14b2 is used as a space for arranging the subject. Note that 17 shown in the figure is the traveling base 11. It supplies power and fluid pressure for driving the support body 122 rotation mechanism 13, supplies driving power to the X-ray source 15, and guides data from the arcuate multi-channel X-ray detector 16 to a signal processing system (not shown). It is a cable type.

Then, an X-ray source 15 and an arcuate multi-channel X-ray detector 1
A subject (not shown) is placed in a space facing the X-ray source 15 and the X-ray source 15 Obtaining a data group for generating a reconstructed image of the plane formed by the arcuate multi-channel X-ray detector 16, obtaining a reconstructed image of the plane using a signal processing system (not shown), and diagnosing the subject. is now possible.

Next, the signal processing system and drive control system of the X-ray CT scanner device of this embodiment will be explained with reference to FIG. 1st
The configuration shown in the figure is a so-called third generation configuration in which an X-ray source 15 and an arcuate multi-channel X-ray detector 16 are opposed to each other, and the data of each channel detector of the arcuate multi-channel X-ray detector 16 is The data acquisition device 18 includes an integrator, an A/D converter, a buffer memory, and the like.

The output of this data collection device 18 is given to a preprocessing device 19. This preprocessing device 19 is a data collection device 18
After receiving the X-ray absorption data collected for each projection (projection direction), we perform logarithmic transformation, gain correction, and offset correction.

Preprocessing such as beam hardening correction is performed.

The data pre-processed by the pre-processing device 19 is input to the convolver 20, which performs convolution (
(sum-of-products operation).

The data after convolution by the convolver 20 is
Pack projector 21. The images are sequentially input to the image memory 22. That is, the pack projector 21 back-projects the convolved data for each projection direction onto the image memory 22 and stores (superimposes) the data to reconstruct a tomographic image.

Then, a desired range of CT values in the data regarding the tomographic image reconstructed on the image memory 22 is set by the image converter 23 and displayed on the CRT display 24.

Here, the traveling base 11. Drive control of the support body 122 rotation mechanism 13 is performed by a main body controller 26 under the control of a system controller 25, and the system controller 25 controls the exposure of the X-ray source 15 (tube voltage, tube voltage, etc.) through an X-ray controller 27. current, exposure time, etc.), and the data collection device 18. Pre-processing section 19. Convolver 20
．． Park Projector 21. It controls the image memory 222, image converter 24, etc. and,
The system controller 25 is operated by an operator via a console 28.

Next, the operation of this embodiment will be explained using an example of diagnosis with reference to FIG. FIG. 3 shows an example in which a portion corresponding to the main body gantry shown in FIG. 1 and the elevating bed 2 shown in FIG. 4 are installed on the floor in the examination room.

The procedure for diagnosis using the X-ray CT scanner device of this embodiment is performed as follows. That is, with the elevating bed 2 lowered and the top board retracted, the subject P gets on the top board and then raises it. Next, advance the top plate (taking a scanogram if necessary) to bring the desired diagnosis site closer to the part corresponding to the main body gantry. On the other hand, the traveling base 11 is driven to cause the entire support body 121 rotation mechanism 13 and U-shaped arm 14 to reach the desired imaging region of the subject P.

This completes the positioning for imaging, and the operator operates the console in the operation room to press the imaging switch, rotates the rotation mechanism 13, emits X-rays from the X-ray source 15, and uses the data acquisition device 18 to Data collection is performed, and a slice image of the imaged region is generated and displayed. After this, if another site or re-imaging is required, repeat the same steps as above.
When the imaging is finished, the traveling base 11 is driven to move the entire support body 12° rotation mechanism 13 and U-shaped arm 14 to the subject P.
The subject P gets off the top plate of the elevating bed 2 by retracting and lowering it.

As described above, according to the X-ray CT scanner device of this embodiment,
When photographing, the part corresponding to the main body gantry and the subject P
Because both can be brought closer and separated,
For special examinations and treatments, it is possible to secure a space for the arrangement of instruments for examinations and treatments, and it is also possible to secure a working space, thereby creating ample space. .

In addition, the interior of the U-shaped arm 14, in which the X-ray source 15 and the arcuate multi-channel X-ray detector 16, which define the region to be imaged, are placed facing each other, can be seen from the outside, making it easy to position the region to be imaged. Therefore, the diagnostic efficiency can be improved.

The present invention is not limited to the above-mentioned embodiments, and various aspects can be taken, for example, regarding the driving direction of the driven members, the number of mechanisms that can be driven, etc.

The invention can be modified in various ways without departing from the gist of the invention.

[Effects of the Invention] As described above, the present invention includes a base fixed to the ceiling of an examination room, a traveling base that can run on this base, a support provided hanging down from this traveling base, and a base fixed to the ceiling of an examination room. A rotation mechanism provided at the hanging end of the support body, a U-shaped arm whose connecting portion is fixed to the rotation axis of this rotation mechanism, and an X-ray source and multi-channel provided at the end of this U-shaped arm. A patient is placed in a space facing the X-ray source and the multi-channel X-ray detector, and the patient is exposed to X-rays while rotating the U-shaped arm. Based on the X-ray transmission data from the direction, a reconstructed image of the plane formed by the X-ray source and the multi-channel X-ray detector is obtained, and the reconstructed image is used for diagnosis of the subject. The parts corresponding to the conventional main body gantry include a U-shaped arm that supports an X-ray source and a multi-channel X-ray detector, a support that supports this U-shaped arm, and a traveling base to which this support is fixed. Since the part corresponding to the main body gantry can run on the base, it is possible to easily bring the part corresponding to the main body gantry and the elevating bed close together or separate them. Therefore, by separating them, it is possible to secure the placement space and work space for instruments for examination and treatment, and in the area corresponding to the main body gantry, the imaging site can be set with good visibility from the outside. Positioning of the site is easy and diagnostic efficiency can be improved.

Therefore, according to the present invention, it is possible to provide an X-ray CT scanner device that can secure a space for arranging instruments for examination and treatment and can perform diagnosis efficiently.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of a portion corresponding to the main body gantry in an embodiment of the X-ray CT scanner device according to the present invention, FIG. 2 is a block diagram showing the structure of the electrical system in the same embodiment, and FIG. The figure is a diagram explaining the operation of the same embodiment, the fourth
The figure shows an example of a conventional X-ray CT scanner device. DESCRIPTION OF SYMBOLS 10... Base, 11... Traveling base, 12... Support body, 13... Rotation mechanism, 14... U-shaped arm, 15... X-ray source, 16... Circle Arc-shaped multi-channel
Line detector, 17...cable system. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] A base fixed to the ceiling of the examination room, a traveling base that can run on the base, a support provided hanging from the traveling base, and a rotation mechanism provided at the hanging end of the support. U whose connecting part is fixed to the rotating shaft of this rotating mechanism
It is equipped with an X-ray source and a multi-channel X-ray detector provided at the end of the U-shaped arm, and a subject is placed in a space facing the X-ray source and the multi-channel X-ray detector. Based on the X-ray transmission data from multiple directions obtained by irradiating X-rays while rotating the U-shaped arm, the surface formed by the X-ray source and the multi-channel X-ray detector is An X-ray CT scanner device configured to obtain constituent images for use in diagnosing the subject.