JPS63286139A - X-ray radiographic equipment for head and cervix - Google Patents

Abstract

PURPOSE:To obtain many functions and to enhance efficiency, by freely revolving a housing, which has an operating means for mounting a chair for an examinee and freely moves the chair in X- and Y-axis directions, around the fixed point on an X-ray emitting axis. CONSTITUTION:A chair operating mechanism 5 mounting a chair 3 and freely moving said chair in X- and Y-axis directions and revolving the same is mounted in a chair base stand 6. A movable X-ray tube apparatus 2 is constituted by mounting a multiple iris 10 to a large capacity tube bulb (X-ray source) 9 and mounting the whole on the rising and falling shaft 13 moving up and down by a rising and falling mechanism 12. The emitting axis Xc of the X-ray source 9 can take an arbitrary dip theta1 or elevator theta2 only in one direction. The fixed shaft 15 having the rising and falling mechanism 12 mounted therein is implanted in the truck 18 moving along the guide rail 17 laid on a floor surface 16. The height H1 of a pair of the left and right ear lots 31L, 31R of the head fixing mechanism 30 provided to the chair 3 from the floor surface 16 is kept constant regardless of the rising and falling of the seat 32 of the chair. Then, the head/cervix part 4 is set and fixed at a predetermined position to correspond to photographing of every kind.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Purpose of the invention B) Industrial application field This invention is a full-jaw
+ This invention relates to a head and neck X-ray imaging device that is versatile and X-ray-proof.

(B) Prior art and its problems In current dental practice, accuracy is particularly required in the diagnosis of the face and cranium, including the teeth and jaws, and the SX15g is indispensable to meet this demand! Full jaw X-ray tomography device as a diagnostic device (
I will write down the buff 2 outfit R below.

Head X-ray standard photography device (hereinafter referred to as cephalometric device)
and X-ray temporomandibular joint imaging device (hereinafter referred to as temporomandibular joint device), each of which has a different imaging method.
Since their configurations and operations as well as the capacities of the X-ray sources differ, they are usually manufactured individually as single-function devices. Therefore, an X-ray protection room equipped with all of the above-mentioned single-function devices requires a considerable amount of space, and while this is possible in large hospitals, it is possible to install an X-ray protection room with all the above-mentioned equipment in a general dental clinic. It is difficult to establish For this reason, one of the above-mentioned devices is either omitted, or the panoramic device and the cephalometric device 2 are integrated into one, which is called a panoramic cephalometric device.

Currently, efforts are being made to reduce the number of safety rooms by using a combination device that shares an X-ray source.

Furthermore, in both the protection room of the above-mentioned city clinic and the large pus control room of a large hospital, the X-ray emission directions of the X-ray sources of the multiple devices installed are not only different.

Since there are devices such as panoramic devices in which the X-ray beam rotates by more than 200 degrees, the X-ray shielding ability of the protective wall is
It is necessary to strengthen the entire area, which increases the cost of constructing a protective chamber.

1. Even if you use the Shino panoramic device currently on the market, which is a device that fixes the X-ray source, rotates the patient chair, and moves the cassette, the device described above is only capable of taking panoramic images. Since it has only one function, the conventional Cepha tube device and temporomandibular joint device must be installed in the same protective room.

Therefore, the X-ray radiation and shielding ability of the above-mentioned protective wall cannot be significantly reduced, and the above-mentioned problem of high cost remains unsolved. For this reason, in the dental medical field, the above-mentioned combined panoramic and cephalometric equipment is not satisfactory; it is also capable of photographing the temporomandibular joints, and is as multifunctional as or more than the combination of all the above-mentioned equipment. There is currently a strong demand for a device that is inexpensive compared to the cost required for X-ray protection, takes up little space, and can be housed in a low-cost X-ray protection room. The invention relates to an apparatus for photographing X#l information transmitted through the head and neck of a subject in a chair-sitting position, in which an X-ray source and an imaging unit are placed opposite each other across the head and neck of a subject in a chair-sitting position. Using a shared X-ray source -1 The chair for the patient with the head and neck positioned and fixed facing it can be freely moved and rotated by a predetermined angle in accordance with the 1 part of each imaging method mentioned above, or While continuously rotating on a predetermined orbit while always keeping the direction of movement constant, it exhibits more functions than the above-mentioned multiple devices, is efficient, and can be easily moved.
1! The object of the present invention is to provide a device that is easy to protect and requires low equipment costs, including a protective chamber.

(2) Structure of the invention (technical means) The technical means taken to solve the above problem are as follows.

0) Place a patient chair on which the patient's head and neck are positioned and fixed, and move this chair freely in the X-axis and Y-axis directions on a predetermined plane, and around a predetermined fixed point as the center of rotation. A rotating chair operating means is provided.

CI:0 Through the means, the head and neck are moved to an arbitrary position and rotated by a predetermined angle about the predetermined fixed point as a center of rotation, corresponding to transmission image capturing of each of a plurality of different imaging regions; A means is provided for rotating and moving the X-ray source on each of the imaging trajectories corresponding to the curved tomographic imaging of different tomographic areas in a switching manner;

Providing means for displacing it in the opposite direction or in the opposite direction and in the vertical direction.

(=) Providing means for displacing the imaging section intermittently or continuously as necessary.

(3) Effect of technical means The configuration of the apparatus according to the present invention is such that the subject is seated.

A patient chair (hereinafter simply referred to as a chair) equipped with a head fixation mechanism for positioning and fixing the head and neck is placed, and the X-axis, Y-axis, and rotation axis are each driven by, for example, a motor. and a chair operating mechanism for freely operating the position and orientation of the chair.

It supports an X-ray source that faces the positioned head and neck and has a capacity to withstand the maximum load of multiple imaging methods described below, and is movable in the direction facing the head and neck, for example along a guardrail, and A movable X-ray tube device equipped with a source elevating mechanism and an X-ray source that captures transmission images or tomographic images of the X-rays transmitted through the head and neck, as well as intermittent images in the direction orthogonal to the X-rays as necessary. There are five functions that can be used to take images, such as a cassette containing X-ray film, an image tube that moves continuously, or an image tube.

(3) is Grant and Lant.
(4) is a panoramic image of the left and right temporomandibular joint tomographic regions, and (5) is a panoramic image of the entire jaw tomographic region mainly containing the dental fossa. Each of the above shooting functions will be explained step by step (1), (2) and (5).
) has the same imaging principle as the conventional device, so we will mainly discuss the differences in operation etc. (1) Cephalometric imaging is
First, adjust the direction of the chair and the height of the X-ray source from the floor so that you can aim at the cephalometric reference line that connects the external auditory canals of the head and neck. Move the chair to a position where the point (denoted as a dot) is a predetermined distance from the cassette, and fix it, and move the X-ray source so that the X-ray focal point is also located at a predetermined distance.

Move and fix. After that, just change the direction of the chair and take the photo. (2) For the Shula method, first, the right ear loft support rod of the head fixation mechanism installed on the chair is brought close to the cassette and set in the X direction, and the radial cone axis is aimed at the tip of the four ear feet. The device is advanced to a position perpendicular to the X-ray and fixed, and the right temporomandibular joint is photographed.

After photographing the closed state, the cassette is moved a predetermined distance to photograph the open state. Next, return the chair to its original position, where the center of the chair and the center of the operating mechanism match, and then rotate it counterclockwise (180° horizontal deviation) to a position where the left earloft support rod is close to the cassette. Then, the chair is moved back so that the radial cone axis is aimed at the tip of the left ear pad, and the left temporomandibular joint is photographed.
Reproducibility is better if you open the aperture and shoot left and right, then left and right.

(3) Frontal imaging of the left and right temporomandibular joints cannot be performed with conventional equipment, and there is no dedicated equipment for this purpose. In this case, first move the chair so that the back of the head is in contact with the cassette; for example, in the case of the left temporomandibular joint, rotate the chair so that the median stripe plane is tilted at a predetermined angle counterclockwise with respect to the radial cone axis. and fix it. After the X-ray source is returned to its operating position, the chair is rotated to a position where the median stripe plane is tilted at a predetermined angle clockwise with respect to the radial cone axis, and the right temporomandibular joint is photographed. (4) For panoramic imaging of the left and right temporomandibular joint tomographic regions, there is no dedicated equipment for this purpose, and only a few conventional panoramic devices include devices that mainly capture the dental nitrid tomographic region, as well as devices that image the temporomandibular joint tomographic region. It just is. This invention attempts to image only the temporomandibular joint tomographic region, and there are two configurations with different imaging principles, one of which is selected as an alternative. One of them is to utilize the radius of curvature of the curved surface formed by the fault area. A mask is used on the X-ray source to make it possible to emit an X-ray beam, and the height is set so that the aforementioned cephalometric reference line can be aimed at. Set the X-ray focal point to be located at the distance. In a state where the fault area is close to the cassette.

The direction of the chair is rotated by a predetermined angle so that it is located near the starting point of the fault area curved fault area on the vertical line of the rotation center of the chair operating mechanism, and the cassette is rotated in the opposite direction to the rotation of the chair at the above rotation speed. It moves continuously at a constant speed to take panoramic images of the fault area.

Next, the center of the chair is returned to the vertical line of the rotation center of the chair operating mechanism, and after the chair is rotated 180' counterclockwise, a panoramic image of the left temporomandibular joint tomographic area is taken using the same procedure as above. The above is one configuration, and the other configuration is based on the same principle as the panoramic imaging of the whole jaw tomographic region described in (5) below, and involves setting the position of the X-ray source.

The radiation of the X-ray beam and the continuous movement of the cassette are the same as the configuration described above.
By controlling and driving each, the subject's temporomandibular joint tomographic region is always rotated at a constant speed under the square projection of the X-ray beam relative to a fixed point on the vertical line of the rotation center of the chair operating mechanism. The chair rotates within a predetermined angular range as shown in FIG. In this way, for example, after moving the imaging starting point of the left temporomandibular joint tomographic region onto the vertical line of the rotation center of the above-mentioned chair operating mechanism, the chair is rotated and moved in the same way as above, and a panoramic view of the right temporomandibular joint tomographic region is obtained. Take pictures. Finally, there is a major difference in (5) in that the test subject remains stationary at a fixed position with a constant angle of attack based on the curvature of the teeth, and the subject rotates. In other words, with respect to a fixed point on the vertical line of the rotation center of the chair operating mechanism,
The chair is operated so that the subject's whole jaw tomographic trajectory is always moving and rotating under the square projection of the X-ray beam. This rotation speed and the speed of movement of the cassette in the opposite direction are controlled to be variable speeds depending on the location of the fault region, as in the conventional device.

(4) Effect of the invention This invention is configured as described above, and as described in the previous section, the device according to the invention has five different types.
It is a groundbreaking multi-functional X-ray device that has various imaging functions, and can be considered a versatile X-ray device if the target area is limited to the head and neck.

This is a system in which the operating means of the patient chair places the chair on it and allows the chair to be freely rotated around a fixed point on the X-ray emitting cone axis, which is a structure that allows the chair to be freely moved in the X-axis and Y-axis directions. Yes.

Moreover, the movement and rotation in the X-axis and Y-axis directions are driven. By keeping the low magnification of the tomographic area of this device constant, it is possible to image different arbitrary tomographic trajectories simply by changing the control conditions of the full-scale image. In this way, the radiation direction of the X-ray source is always constant, and only one side of the peripheral wall of the X-ray protection room provides primary protection with enhanced X-ray shielding ability, while all other sides are used for patients and equipment. Secondary protection against scattered X-rays from other sources is sufficient, and a protective room can be constructed at low cost.Furthermore, even if a large-capacity X-ray tube is used, the ratio of single-load cephalometric imaging and temporomandibular joint imaging is low. High(,X
Not only are wire tubes not expensive.

-You can obtain photos with excellent sharpness even when shooting with misalignment.

It becomes a device with high diagnostic ability and improves the efficiency of the X-ray source.

Although this device has sophisticated mechanisms such as the chair operation mechanism and is expensive, it is much less expensive than the conventional single-function devices mentioned above. Needless to say.

A specific example will be explained. Figure 1 shows the five functions mentioned above (3)
The relative positional relationship with the head and neck region (4) of the subject sitting is line C.
2r indicates the image obtained during Shula's imaging or frontal imaging of the temporomandibular joint. The device (1) includes the movable X-ray tube device (2), a chair (3), and this chair.

A chair base (6) with a built-in chair operating mechanism (indicated by dotted lines) (5) for freely moving and rotating the arm in the X-Y axis directions, and a support column (7) installed on this base. ), for example, a cassette loading section (8). The movable X-ray tube device (2) has a tube voltage of 100 KV, for example.
p, tube current 300 mkf) A large capacity tube (hereinafter referred to as an ! The radial cone axis (X
c) is installed so that it can take any angle of depression (θ1) or angle of attack (θ2) in only one direction. The fixed shaft 051 that incorporates the lifting mechanism 02) is connected to the floor (161
The guide rail (1?i) is installed on the trolley a81 that moves along In the range of the lifting shaft α31, which has a guide groove (to) that fits into the guide pin (c) that screws into the upper bearing part ■ at the top and the guide member ■ protruding from the fixed shaft slightly below it. Raise and lower. Returning to Figure 1, a pair of left and right ear lofts (31L) of the head fixing mechanism ■ installed on the chair (3)
(3) The height Hl) of R) from the floor side is kept constant regardless of the elevation of the chair seat (
) is planted on the fixed pedestal of the chair. Therefore, the head and neck (4) can be positioned in a predetermined position by raising and lowering the seat (support) according to the individual differences in the sitting height of the examinee and inserting the Earoff (31L) (31R) into both rows of ear canals. to be fixed. In addition, in order to keep the oculo-aural plane connecting the upper part of the ear rod and the lower rim of the orbit horizontally during full-jaw panoramic photography, it engages with the chin rest used for positioning the head and neck, and the vertical position is slightly changed. The adjustable lever that regulates the position of the front teeth is installed at the tip of the lever that rotatably engages with the member protruding from the operating platform of the head fixation mechanism. In order to rotate to a predetermined position and take 10 images, the cassette loading section (8
) in cassette 1411 (421 to 1
The aim is to maintain a distance of 51 (Le). Rotate the chair (3) so that the midsagittal plane 0 is parallel to the head (41) and the left side of the head is facing the X-ray source (9) as shown in the figure. , fixed. The hot spot (9) of the X-ray source (9)
X) is 150 clN, (
After identifying the 0 section of the cart at the position of Lb) and operating the elevating mechanism 02+ so that its radial cone axis (Xc) aims at the cephalometric reference m (Ls), side cephalometric images are taken.

Frontal and oblique cephalometric imaging are performed mainly by manually rotating the chair (3). Moving the loading position of the cassette (41) corresponding to side and frontal imaging and replacing the mask of the X-ray source (9) are the same as in the conventional apparatus.

Next, the third. The chair operating mechanism (5) built into the chair base (6) will be explained with reference to FIG. The third hole is the base cover
A plan view with (6C) removed, Figure 4 is I of Figure 3.
It is a V-mV' cross-sectional view. In Figure 3, there is a one-dot chain line (7).
), and a two-point chain k (4fl
The outer circle in ii is the fixed pedestal of the chair (3), but in order to explain the internal mechanism (5), the above (6C) (45i
((41 is an imaginary line showing only the related position.Chair (3)
The central axis (4η) has several bolts, and is slidably supported via a pair of guide shafts GIi installed in parallel on the Y-direction carrier (51).

Furthermore, the X-direction carrier (491 has a cylindrical nut screwed onto the screw shaft and shown by the dotted line), and the screw shaft ω is the pinion of the output shaft of the pulse motor A (A) provided on the Y-direction carrier 511. It is directly connected to spur gear i!i7) that meshes with
Move freely to X). The movement of the Y-direction carrier 61) in the Y-direction is also performed with the same configuration as above. In other words, a rotary structure having four bearings (501) such as the above-mentioned ball bushings and having notches (supports) formed at the four corners is installed parallel to the rotary structure.
Y is slidably supported across a pair of guide shafts.
The direction carrier 6B has a cylindrical nut protruding from it.
The screw shaft (641) screwed into the pinion (65) is
・YIIl by reversible rotation through the flat case
] Move freely in the direction (G). The rotating structure (59) is provided with a disc brake U9 that engages with one weight and regulates the rotation angle of the body 69), and stops and fixes the chair (3) at a predetermined rotation angle position. In addition, the casters installed on the periphery of the rotating structure (5) are sufficient to distribute the entire load of the chair and its operating mechanism (5), including the subject's weight, and to facilitate its rotational operation. Provide the necessary number of items. With the above configuration, the center (3C) of the chair (3) is the center of the operating mechanism (5C).
), it can be displaced, for example, by approximately 150 fl in the left-right direction of the X-axis and the front-back direction of the Y-axis, and can be rotated at any angle in its eccentric state.

Next, the Shula method photographing, which was made possible by the operation of the chair operating mechanism (5), was performed in the first step. Fifth. This will be explained with reference to FIG. As shown in Figure 1, the XM tube device LV (21
The distance (La
) is 50 to 60α, and its radial off-axis (Xc) is
High-8 (H2) D X-ray ffi (9) Set all. If you take a picture of the right temporomandibular joint with the mouth closed, it will deviate from the axis (Xc). Therefore, move the chair (3) in the Y-axis direction (Yl (
The radial off axis (Xc) moves forward in disorder and the right ear loft tip (
3] Take a picture while aiming correctly at RT).

Next, to photograph the left temporomandibular joint, take the center of the chair (3)
Return (3c) shown in the figure to its original position, that is, the center (5c) of the operating mechanism, and move counterclockwise 180'+]
After rotating the chair by O'=190°, move the chair to a position where the support rod of the left ear rod (31L) is close to the cassette 141H, as described above, and then move the chair in the Y-axis direction (A). When the camera is moved back by 1, the radiation off-axis (Xe) aims at the left ear rod tip (31LT), and a photograph is taken in this state. The cassette (41) used for this photographing has, for example, a built-in X-ray film for panoramic photography, and has a length e) of ]/4 (e/4) so that four photographs can be taken in the longitudinal direction. 4) Move it one by one each time you take a photo. Next, the first. 7th. Figure 8 shows the front view of the temporomandibular joint (Gr
Ant and Lanting method) will be explained. 1st
Because it is closer to the head and neck (4) than the point (9X) in the figure, the head and neck are (
Come to position 4). Therefore, move the chair in the Y-axis direction (Y)
) (Ran 2) Move it forward and fix it at a position where the radial axis (Xc) aims at the center of the left orbit (78L). At this time, the subject is photographed with the subject's eyes wide open and the eye and ear planes kept horizontal. After moving the chair backward (2) in this open state, it was rotated clockwise so that the above angle (θ4) was 20°.

As above, move back further by (Ran 2) and move the center of the right orbit (
78R) at the aiming position and take a picture. In this case, the cassette I41) is moved by about 1/3 of the length in the longitudinal direction of the X-ray film. The above is an example of direct fluoroscopic image capturing of a plurality of parts using this device (]).

During its operation, the raising and lowering of the X-ray source, the movement and rotation of the chair (except during cephalometric imaging) are all automated, and the movement and aiming of the X-ray source, the intermittent movement of the cassette,
The rotation of the chair during cephalometric imaging is normally done manually; however, the plan view is taken as necessary, and Figure 10, which has been partially cut out to show the interior, is from x-X in Figure 9. The cassette I41), which is a cross-sectional view and is indicated by a two-dot chain line in FIG. The authors have filed an application for a cassette moving mechanism (82) that continuously moves a tomography cassette (array) at a variable speed according to the shape of the tomographic region by driving a pulse motor D (811), as shown by the three-dot chain line.

It is described in detail in the already published publication of Utility Model Application No. 156206/1983 entitled "Dental Panoramic X-ray Photography Apparatus", so it will be briefly explained here.

That is, the cassette moving device flit f82+ slidably supports the cassette carrier (831), and also has a carrier support structure (84) that is continuously moved by the drive of the pulse motor D (811).
It is made up of. The cassette carrier (83) is a traveling shaft with a circular cross section, and the cassette holding frame (86) is made of cast material and is a ball bearing for axial movement such as the balls and bushes of the motor base (9A). ) through the traveling shaft (8
5) slidably supports the motor base (rl
The friction wheels of the motor (81), which are swingably supported on the support shaft -1 installed in [l), are coated with urethane rubber and fixed to one end of the motor base (■). The tension member (95) and the tension member (95) are pressed against the traveling shaft connection (2) by the elastic force of a spring (95) stretched between them.
To surely convert rotation of 81j into movement of cassette carrier @3j. □□□ is a member to prevent lateral vibration when the cassette carrier (&()) is moved.

Other X-ray beam entrance holes installed on the front mask of the carrier support structure (8) (!Jj, X-ray detector for automatic exposure control (100) installed at the rear of the cassette)
, a photodetector (102) (103) for detecting the loading position of the cassette and the starting position of the cassette, and an electronic circuit (104) for variable control of the moving speed of the cassette (In+) according to the shape of the fault area. This is the same as the device in the published publication, and a detailed explanation will be omitted.Here, as an example of curved tomographic imaging of the left and right temporomandibular joint tomographic regions using this device (]), the above-mentioned (
3) One of the two configurations described in the section 11.
This will be explained using figures. As stated in section (3) above, an X-ray beam (XB) is emitted from an X-ray source (not shown).
The X-ray source is fixed at a distance (Ln) of, for example, 53 strokes from the cassette (80) at a point whose vertical height is shown in FIG. Now on the left “manifold fault area (]0
If you are shooting from a cassette (80)
Place the chair (3) in the cassette (Ill.
o), and move the chair counterclockwise (θ5) at a position where the center point (01) of the radius of curvature (rl) of the tomographic trajectory (L5) of the left temporomandibular joint coincides with the rotation center (5c) of the chair operating mechanism. )
For example, when rotated 17 degrees, the temporomandibular joint and head and neck (4
) is the position shown by the solid line in the figure. In other words, the X-ray beam (Xc
] is aimed at.

After preparing in this way, when the X-ray beam (XB) is emitted, a control device (not shown) generates a pulse motor C (73i) of the chair operating mechanism (5) and a cassette transfer unit U.
The 821 pulse motors Dff1ll simultaneously rotate at controlled speeds to move the chair (3) clockwise (■).
(θ6), it is rotated in a circular arc shape with an angle range of about 26°. This means that the fault area aO5L)
The ray beam (XB) is projected midline, and the image is captured in a panoramic manner on an X-ray film in the XM telescope (80).

Next, although illustration is omitted when taking a panoramic photograph of the right temporomandibular joint (]05R), the direction of the head and neck at the end of the photographing on the left side (with the orientation of the four fingers unchanged, the center pγ is returned to the original position, that is, the operation mechanism After returning the chair to a position that matches the vertical line of the center (5c) and rotating the chair 180 times, take pictures using the same procedure as above.Next, using Fig. 12, we will focus on the alignment of the teeth using this device (1). An example of panoramic imaging of the whole jaw tomographic region (106) will be described below.The figure shows the imaging start position of the whole jaw tomographic region (106) as a solid line, the imaging end position as a dotted line (10bX'), and ) The tomographic area (106') at the time of imaging is shown by a dashed-dotted line, and the imaging position between them is not shown because it makes the diagram difficult to see.This equipment (unlike the conventional equipment) ) always irradiates a fixed point (P8), and the full-jaw tomographic trajectory (L6) passes every moment in a state orthogonal to the X-ray beam (xB), thereby achieving the same angle of attack of the full-jaw path 10o as with the conventional device. (
While holding the θ2 angle, fix the eye and ear plane horizontally using a cassette (with the head part (4) held close to the head, the above-mentioned jaw rest and bite block (support)). At this time, put a bat on ear lower) C (11),
The external ear canal is released and the head is held between the bats. After preparing in this way, an X-ray beam (Xn
), the rotation of the chair (3) and the continuous movement of the cassette carrier (p) to
i tpf or median sagittal plane C) rrlf t(!
-y -ro a=sts (LS) <Ls'>
<Ls'5 The positional relationship of the toner intersection is as shown in the diagram,
Further, the trajectory from 0) to (d5L01 to (Of') moves clockwise (
A complex but constant trajectory is formed in response to passing through al. Therefore, the three pulse motors A (g) and B (641) of the chair operation m structure (s).

C (capital)) is controlled by, for example, a microcomputer (not shown), and is moved to a position for each unit rotation angle. The cassette (80), which continuously moves in the opposite direction (b) in accordance with the rotational speed of the chair, is also variable-speed controlled by the pulse motor D (8), so that the above (Vc3)
It moves at a variable speed (VO4) with a constant ratio.

After rotating 1000 times in this way, when the whole jaw tomographic area reaches the position (1065), the whole jaw tomographic area panoramic imaging ends.

The above is a description of an embodiment of the device according to the present invention.
It goes without saying that the present invention is not limited to the illustrations and descriptions. For example, although the imaging unit has been described as a cassette loading unit, it may also be an imaging unit that uses an image tube and a television picture tube as a monitor and records it, or it may convert an X-ray image into a visible light image using a source plate. However, it is also possible to use an imaging unit that photoelectrically converts and g using a recently developed two-dimensional solid-state imaging device and records the image using a television monitor and a recording device. Also, will the imaging function of the device be simplified so that it can be used for both full-jaw panoramic imaging and cephalometric imaging?

Alternatively, it may be used for both full-jaw panoramic imaging and temporomandibular joint imaging. In addition, the movable X-ray tube device

[Brief explanation of drawings]

A sectional view of the sieve mechanism, and FIG. 3 is a plan view of the chair operating mechanism. Fig. 4 is a sectional view of IY-IV' in Fig. 3, Fig. 5 is an explanatory diagram of right temporomandibular joint Schuller imaging using this device, Fig. 6 is an explanatory diagram of left temporomandibular joint Schuller imaging, and Fig. 7 is an explanatory diagram of left temporomandibular joint Schuller imaging.・Figure 8 is an explanatory view of frontal imaging of the left and right temporomandibular joints, and Figure 9 is a rear view (partially torn away) of the cassette moving mechanism of the imaging unit. FIG. 10 is a sectional view taken along the line xx' in FIG. 9 (the motor part is not a cross section, but a side view), and FIG. 11 is an explanatory diagram of curved tomography of the temporomandibular joint tomographic region (left temporomandibular joint). Figure 12 shows the curved fault g of the entire fault area, which is mainly composed of the dentition.
#Is an explanatory diagram of photographing.

Claims (1)

[Scope of Claims] 1. An apparatus for photographing X-ray information transmitted through the head and neck, in which an X-ray source and an imaging unit are disposed opposite to each other across the head and neck of a subject sitting on a chair. A chair operation in which a chair for an examinee having means for positioning and fixing is placed, the chair is moved freely in the X-axis and Y-axis directions on a predetermined plane, and the chair is freely rotated about a predetermined fixed point as the rotation center. a means for moving the head and neck to an arbitrary position corresponding to transmission image capturing of each of a plurality of different imaging regions through the means, and rotating the head and neck by a predetermined angle about the predetermined fixed point as a rotation center; means for rotating and moving the X-ray source on respective imaging trajectories corresponding to curved tomographic imaging of different tomographic regions in a switchable manner; 1. A head and neck X-ray imaging apparatus, further comprising means for displacing the imaging section intermittently or continuously as necessary. 2. The head and neck X-ray imaging apparatus according to claim 1, wherein the imaging section is a cassette containing an X-ray film. 3. The head and neck X-ray imaging device according to claim 1, wherein the imaging section is an image recording device using an image tube. 4. The head and neck X-ray imaging apparatus according to claim 1, wherein the imaging section is an image recording device comprising a phosphor plate and a two-dimensional solid-state imaging device. 5. Whether the different X-ray images are lateral, frontal, and oblique head standard photographs and right and left temporomandibular joint normal and lateral images;
The head and neck X-ray imaging apparatus according to any one of claims 1 to 4, which is a transmission image of one of the above. 6. The head and neck according to any one of claims 1 to 5, wherein the means for vertically displacing the X-ray source is capable of setting the X-ray emission cone axis to any angle of depression or attack. X-ray photography equipment.