JPH0718701U - Full-jaw panoramic radiography device for both standing and supine position - Google Patents

Abstract

(57) [Summary] [Purpose] To use a full-jaw panoramic radiography device for standing or sitting as a supine position. In a device provided with a head fixing mechanism in which a subject's face is in a space in front of the device main column and is lateral to the device main column, a predetermined position of a movable lifting platform is provided on the device main column. This is a configuration in which an arm rotation mechanism section that suspends and rotates the arm around the rotation center is pivotally attached to the vertical direction so as to be rotatable by 90 °.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an improvement of a dental panoramic X-ray imaging apparatus for taking a tomographic image of not only the dentition area but also the oral area and the facial area including the upper and lower jaws in a panoramic manner for dental treatment. Not only the subject but also the sick person who cannot sit or sit upright, such as a sick person, can be taken upright while lying on the bed, and panoramic images of various tomographic images can be taken in the same manner as when standing. The present invention relates to an X-ray imaging apparatus.

[0002]

[Prior art]

 In recent years, most of the dental full-jaw X-ray tomographs (hereinafter referred to as full-jaw panoramic radiographs), which have been widely used as an indispensable device for dental treatment, are used for standing or sitting on the subject. The image is taken depending on the posture. In rare cases, the device of the invention of Benwalt Corporation in the United States disclosed in Japanese Patent Laid-Open No. 50-2284 and the authors disclosed in Japanese Patent Publication No. 484943. There are devices for "X-ray curved tomography device", but these devices are for the supine position only, and cannot image a subject in a standing or chair sitting position. In this way, modern devices are either for standing or sitting, or supine only, and a device for both standing and supine has not yet been developed. Therefore, for example, when a tomographic image of the facial area of a seriously ill person who cannot get up or an injured person due to a traffic accident is needed, it is impossible to treat at a hospital in Ichii that does not have a dedicated supine device. In recent years, there is a strong demand for the development of a full-jaw panoramic X-ray imaging apparatus that can be obtained at an appropriate price and can be used in both standing and supine positions.

[0003]

[Problems to be solved by the device]

 The problem to be solved is to improve the conventional device (only for standing or sitting position) with a minimum cost to make it a device that also functions as a supine position, and always use it for standing position, and easy switching operation as needed. This is to provide a combined full-jaw panoramic radiography apparatus capable of taking panoramic photographs of the dentition and the facial area, which are excellent in sharpness and resolving power, to a subject in a supine position.

[0004]

[Means for Solving the Problems]

 The technical means for solving the problems are as follows. Among all-jaw panoramic X-ray imaging apparatus, an apparatus provided with a head fixing mechanism for fixing the head so that the subject's face is in the space in front of the main pillar of the apparatus so as to be lateral to the main pillar. A) In the conventional device, the cantilever arm part that is engaged with the main pillar of the device and is integrally fixed to the vertically movable pedestal is separately provided for the arm rotation mechanism part and the elevator pedestal. A) With the predetermined position of the lifting platform as the center of rotation, the arm rotation mechanism is pivotally mounted 90 ° in the vertical direction and is rotated between the lifting platform and the arm rotation mechanism. It is equipped with a driving source and a 90 ° rotating mechanism. C) Corresponding to each posture of the subject in the standing position and the supine position, the predetermined distance vertical movement and the normal or reverse rotation are alternatively performed. , Always position the arm above the subject's head. With, the relative positional relationship between the X-ray source, the cassette holder and the head on the same. D) The head of the subject in the supine position is supported by a mounting table made of an X-ray transparent member and is aligned with the body axis. That is.

[0005]

[Action]

 Since the present invention is configured as described above, the arm rotation mechanism section and the arm are always located above the head of the subject regardless of whether the subject is standing or lying down. The relative positional relationship between the X-ray source and the cassette holder and the head is kept the same. Therefore, the function of panoramic radiography of all jaws of the face is exactly the same in both standing and supine positions, and there is no change in the captured panoramic image. This is the main part of this invention. That is, the means for switching from the standing imaging condition to the supine position is to first lower the lifting platform by a distance equal to the difference between the arm position in the standing position and that in the supine position, and then, for example, the arm rotation mechanism section. When it is rotated 90 ° clockwise, the arm position corresponds to the supine position. Therefore, if the head of the subject lying on the bed that also serves as a stretcher is fixed by the head fixing mechanism in the same way as when standing, the preparation for imaging in the supine position is completed.

[0006]

【Example】

 A specific example of this invention will be described below with reference to the drawings. FIG. 1 is a side view showing an imaging unit of a full-jaw panoramic radiography apparatus for both standing and supine positions according to the present invention, which corresponds to the standing position or sitting position of the subject (1A). . An elevating platform (3) is movably supported by, for example, hydraulic pressure on an apparatus main pillar (2) installed on an apparatus base (not shown). The arm rotation mechanism part (4) is pivotally attached to the vertical direction by 90 ° about the predetermined position of the elevating platform (3), and the arm rotation mechanism part (4) has a built-in arm rotation mechanism. The mechanism (5) is driven by the drive motor (6) to rotate the arm (8), for example, clockwise by 220 ° via the arm rotation shaft (7). An X-ray tube (9) was provided at one end of the arm (8), and the X-ray beam (10) penetrated the subject's head (11) and was suspended at the other end of the arm (8). For example, a flat cassette (14) which receives an image through the slit (13) of the cassette holder (12) is movably supported by the cassette holder (12) in a direction orthogonal to the X-ray beam (10). There is. The reversible motor (15) shown by a dotted line inside the cassette holder (12) is, for example, a five-phase pulse motor, and the dotted line (16) is a film drive control circuit section for controlling the drive of the motor (15). is there. The head (11) of the subject is placed on the chin rest (18) of the head fixing mechanism (17) so that its face is parallel to the vertical surface of the arm rotating mechanism (4) as shown in the figure. The jaw rest (18), which is fixed to, is moved about 20 mm, for example, through the rotation of the rotary knob (19). Further, a pair of left and right head supports (20) (20 ') and a lever (22) of the head portion (11) are both head positioning bases (23) provided on the arm rotation mechanism portion (4). ) Can be finely adjusted via the knobs (24) and (25), respectively. Further, a strip visible light source (26) is provided on the vertical surface of the arm rotating mechanism (4), and when the light source switch (27) is turned on, the strip light beam (28) causes the front tooth of the subject to be detected. Irradiate the containing vertical line (29). This irradiation position (29) is a reference position including the middle position of the front and middle incisors and serves as a fixed point in the tomographic imaging area of the apparatus. The details of the positioning function of the head fixing mechanism (17) are described in detail in the “dental full-jaw X-ray radiographing device” of “Japanese Patent Publication No. 63-14816”, which has been filed and published by the authors. Since it is written, further explanation is omitted here. The above configuration is almost the same as the conventional device, the device of the present invention is greatly different from the conventional device, and the main point of the present invention is that the arm rotation mechanism part (4) and the elevating platform (3). It is a 90 ° rotation mechanism (30) of the arm rotation mechanism section (4) provided between and. This mechanism (30) will be described with reference to a partially cutaway sectional view of FIG. 1.

In the cutting section of the arm rotation mechanism section (4) and the lifting platform (3), (32) is a reversible motor fixed to the inner upper frame (4B) of the arm rotation mechanism section (4), and is a pinion. (33) Drive. The spur gear (34) that meshes with the pinion (33) is integrally fixed to the lifting platform (3). That is, the spur gear (34) is fitted to the missing columnar shaft (37) at the tip of the rotating main shaft (36) which is fixed to the inside of the outer cover (3B) of the lifting platform (3) by several bolts. And fix it firmly with a wedge (38). Therefore, when the pinion (33) rotates clockwise, for example, the arm rotation mechanism (4) is rotated clockwise about the axis of the main shaft (36) via the bearing (39), The drive of the motor (32) is stopped when exactly 90 ° is rotated by an optical sensor (not shown). At this time, the steel ball (42) urged by the elastic force of the compression spring (41) of the recess (40) provided in the outer cover (3B) of the lifting platform (3) causes the arm rotation mechanism (4). It is press-fitted into the recess (43) of the frame (4B), and the arm rotating mechanism (4) is held at the 90 ° position, that is, in the horizontal state, and is in the supine position. The lifting platform (3) may be moved a predetermined distance in the vertical direction (a) after rotating the arm rotation mechanism section (4), or may be moved vertically before the rotation operation. The hollow (43) of the arm rotating mechanism section frame (4B) is also provided in the upright position.

FIG. 2 shows an apparatus in a supine position for photographing, in which the arm rotating mechanism (4) is rotated, for example, 90 ° in the clockwise direction (b) to move the lifting platform (3) to a predetermined position. It is a figure which shows the state which positioned the head (46) of the to-be-examined subject (1B) on the bed (45) which also serves as a stretcher. In this embodiment, an X-ray transparent member such as a hard plastic is used as the mounting table (47) for supporting the head (46) on the bed (45). It may be attached to (4). The head positioning operation is performed by adjusting the height adjusting part (49) of the transfer wheel shaft (48) of the bed (45) in advance and inserting the head part (46) into the device so that the head is almost at the predetermined position. I will come. As described below with reference to FIG. 1, the head positioning operation below is based on the vertical line (29) including the anterior teeth of the subject irradiated by the narrow visible light flux (28) and the head fixing mechanism (17). In the state shown in FIG. 1, the chin rest (18) is opened forward by the joint part (21) of the subject after taking an image, and the head (46) of the subject in the supine position is inserted. Then position it as shown in Figure 2. In addition, a pair of head supports (20) (20 ') and a lever rest (22) are adjusted by adjusting the respective knobs (19) (24) (25). It is provided at the lower end of the wheel shaft (48) and the rotation of a wheel (not shown) is sealed by using an attachment. When the preparation for photographing is completed below, the arm (8) is then rotated so that the X-ray source (9) and the cassette holder (12) are located at the photographing start position. This operation is exactly the same as in the case of the standing subject (1A), and the starting positions of the X-ray source (9) and cassette holder (12) are determined according to the trajectory of the tomography. When the trajectory is a full-jaw dental arch, for example, the left temporomandibular joint of the subject (1A) is used as the starting point for imaging, and the X-ray source (9) is on the right side of the faces of the subjects (1A) and (1B). Or position it forward. Next, when the imaging is started, the arm (8) draws the tomographic trajectory peculiar to the apparatus according to the selected imaging site and rotates while imaging. Of course, if the selected imaging regions are the same, the obtained tomographic images are the same in both the standing position and the supine position. As the arm rotating mechanism, there are various types of drive system devices such as a three-arc complex system, an elliptical drive system, and an XY drive system as typical examples. It goes without saying that the moving mechanism may have any structure. The following is the configuration and operation of the device of one embodiment of the present invention. The present invention is not limited to the above-described one. For example, the above-mentioned arm vertical 90 ° rotating mechanism is provided with the drive motor (32) on the lifting platform (3) side and the spur gear (34) is provided on the arm. It may be fixed to the rotating mechanism (4). Note that the cassette feed control of the cassette holder is not limited to the electric type. In other words, this device only needs to be a device that satisfies the following two items. A) The head fixing device should fix the head sideways with respect to the main pillar of the device. (B) The arm rotation mechanism part is pivotally mounted on the main pillar of the device so that it can rotate 90 ° in the vertical direction with respect to the lift platform that can move up and down. Is.

[0009]

[Effect of device]

 Since this device is configured as described above, it solves the disadvantages and problems of the conventional apparatus in the standing position or the supine position, and the simple and easy switching operation enables both the standing position and the supine position. In addition to enabling full-jaw panoramic X-ray imaging, it has a large effect that it is close to the actual size and enables sharp and sharp panoramic imaging with excellent diagnostics. In addition, the price is significantly lower than the supine-only device. It is possible to provide a convenient device.

[Brief description of drawings]

FIG. 1 is a side view of an imaging unit corresponding to an upright position of an embodiment of a full-jaw panoramic X-ray imaging apparatus for both standing and supine positions according to the present invention.

FIG. 2 is a side view of an imaging unit for supporting a supine position of the apparatus according to the embodiment of the present invention.

[Explanation of symbols]

1A Examinee in standing position 1B Examinee in supine position 2 Device main column 3 Elevating mount 3B Elevating mount outer cover 4 Arm rotating mechanism 4B Frame of arm rotating mechanism 7 Arm rotating shaft 8 Arm 9 X Wire tube 11 Head of standing subject 12 Cassette holder 14 Cassette 17 Head fixing mechanism 18 Meng rest 19 Meng rest adjustment knob 20, 20 'Head support 22 Arm rest 24 Arm rest adjustment knob 25 Head support adjustment knob 26 Fine visible light source 29 Vertical line including front teeth of subject a Vertical direction of lifting platform 30 Arm rotation mechanism 90 ° rotation mechanism and rotation drive source 32 90 ° rotation mechanism (30) Drive reversible motor 33 Pinion 34 Spur gear 36 Rotating main shaft 37 Cylinder shaft at the tip of the rotating main shaft 39 Bearing 41 Compression spring 42 Steel ball 45 Stretch Combined bed 46 Head of the subject in the supine position b Rotation direction of the arm rotation mechanism 90 ° 47 Head mounting table made of an X-ray transmitting member 48 Bed wheel shaft for bed 49 Bed wheel wheel for transfer Height adjustment unit

Claims (2)

[Scope of utility model registration request] 1. An arm having an X-ray source at one end sandwiching the head of the subject and a cassette holder at the other end so as to face each other, and this arm is suspended to rotate around the head. And an arm rotation mechanism section for fixing the head in a space in front of the main column of the apparatus and at the center of the arm rotation so that the face of the subject is lateral to the main column. A device for moving a cassette of the cassette holder at a variable speed corresponding to a tomographic trajectory, and a device for taking a tomographic image of the entire tooth and jaw of the head in a panoramic manner The arm rotation mechanism part for suspending the arm is pivotally attached by 90 ° in the vertical direction around the predetermined position of the elevator base that is engaged and movable in the vertical direction, and the lift base is also provided. .Rotation drive source between arm rotation mechanism parts The arm is provided with a 90 ° rotation mechanism, and it corresponds to the standing position and the supine position of the subject, and is vertically moved by a predetermined distance and rotated by 90 ° in the forward or reverse direction to selectively move the arm. A standing and supine position full-jaw panoramic radiographic apparatus characterized in that it is always located above the subject's head, and the relative positional relationship between the X-ray source / cassette holder and the head is the same. 2. The standing and supine position full-jaw panorama X according to claim 1, wherein the head of the subject in the supine position is supported by a mounting table made of an X-ray transparent member and is along the body axis. X-ray equipment.