JP2011019688A - Head part standard fixing device for x-ray radiography - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a head part standard fixing device gentle to a subject while maintaining a standard property and reproducibility for the head part of the subject for an X-ray radiography apparatus for the single use or multiple use of panoramic, cephalic, and CT imaging, etc. <P>SOLUTION: The ear rod type head part standard fixing device, to be used in the X-ray radiography apparatus capable of using single one, some, or all of panoramic tomography, tomography, cephalic radiography, and CT imaging, fixes the head part of the subject while maintaining the standard property and reproducibility. The ear rod of the head part standard fixing device to be inserted to the external auditory canal of the subject has a shape to be easily broken when force larger than a fixed load acts on a root part near a bonding part with an ear rod arm is applied. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an improvement in a head fixing device for an X-ray imaging apparatus. More specifically, the present invention relates to a head fixing device for an X-ray imaging apparatus for ensuring standardity and reproducibility in X-ray imaging in a dental region. It is related with improvement of the ear rod part used for.

  A typical example of a head fixing device for an X-ray imaging apparatus used for imaging a head and neck region is typically used for dental panoramic tomography or cephalo X-ray imaging, and other tomography, CT It is known that it is also used for photography. In recent years, it is also known that the present invention is applied not only to these devices alone but also to a combined device having a part or all of the functions of these devices as a combined device.

  For example, Japanese Utility Model Publication No. 03-49690 relates to an ear rod used as a head standard fixing device for cephalometric imaging of a panoramic / cephalometric X-ray imaging apparatus as “ear rod of cephalometric X-ray imaging apparatus”. On the other hand, the X-ray image of the ear rod part needs to be sharp and excellent in contrast on the X-ray film taken by Cephalo, but as a means for that, the material and shape are specified and sharper. Thus, an ear rod of a cephalometric radiography apparatus capable of enhancing contrast is disclosed.

Further, in Japanese Patent Application Laid-Open No. 2004-208754, as a “dental X-ray imaging apparatus”, a dental panorama / cephalo combined X-ray imaging apparatus using a linear X-ray sensor cassette or a cephalo X-ray imaging apparatus is used. A primary slit that is movable in the horizontal direction perpendicular to the straight line connecting the X-ray source and the center of the ear rod at the front of the X-ray source at the time of cephalometric imaging, and a fan-shaped X through the primary slit. Opposite to the X-ray source that irradiates the X-ray beam, it hangs vertically from a Cephalo unit arranged on a straight line connecting the X-ray source and the center of the ear rod, and is irradiated from the X-ray source through a primary slit. A secondary slit that faces the fan-shaped X-ray beam and is movable in a horizontal direction perpendicular to the straight line connecting the X-ray source and the ear rod center; It is placed oppositely across the cephalo stud mechanism, and is suspended vertically from the cephalo unit in the same manner as the secondary slit and faces the fan-shaped X-ray beam so as to be a straight line connecting the X-ray source and the center of the ear. The speed at which the X-ray sensor cassettes provided so as to be movable in the horizontal direction perpendicular to each other are scanned synchronously so as to be always in a straight line around the X-ray source, that is, the imaging time is individually set. There is disclosed a dental X-ray imaging apparatus characterized in that a plurality of imaging techniques are set in advance, and imaging time can be alternatively selected from them.

In Japanese Patent Application No. 2007-319150, the X-ray irradiation means 2 for irradiating the subject O with X-rays, the X-ray detection means 1 for detecting the X rays transmitted through the subject O, the X-ray irradiation means 2 and the X-ray irradiation means 2 The X-ray detection unit 1 includes a first sensor unit 10 and a second sensor unit 11 and holds the first sensor unit 10. The first holder unit 20 holds the first sensor unit 10. A second holder part 21 for holding the second sensor part 11; attachment / detachment means for making the first sensor part 10 detachable with respect to the first holder part 20; and the first sensor part 10 for the first holder part 20; A medical X-ray imaging apparatus is disclosed that includes a storage means 13 that enables the first holder part 20 to be stored in the second holder part 21 when it is removed from the medical device.

The above-mentioned device is a panorama / cephalo / carpal bone (simple photographing) / CT photographing combined use of a FPD sensor having a large image receiving area and a strip-shaped CCD image sensor having a vertically long image receiving area. There are various imaging modes such as panoramic imaging mode (dental jaw imaging, temporomandibular joint imaging (2 division, 4 division), maxillary sinus imaging), cephalo imaging mode, carpal imaging mode, CT imaging mode, etc. Of course, even in the panoramic shooting mode, when a standard such as 2/4 division shooting of temporomandibular joint shooting is required, shooting using an ear rod is generally performed.

As described above, the head fixing device used in the cephalometric imaging mode or when importance is attached to ensuring the standardity and reproducibility in imaging, is usually an ear rod that is inserted into the ear canal of the subject. In many cases, it is composed of three points: a chin rest for placing the subject's jaw and a pad that holds the subject's forehead or the eyebrows (nadion), and this is generally a three-point fixing method. It is evaluated that the standardity and reproducibility are high. Although this method is excellent in restricting the movement of the subject due to its nature, the ear rod inserted into the outer ear canal of the subject greatly restricts the movement of the subject. This is a heavy burden on the examiner. Of course, in rare cases, the surgeon fully explains the situation when taking a picture, and performs the positioning operation with great care to the subject who is determined to be able to handle it. There is a subject who suddenly feels extreme anxiety about being fixed in such a way, and is acting to release from it, and in severe cases it is inserted into the ear canal It has also been confirmed that the subject himself escaped by folding the ear rod, and in such cases, the damage to the subject was large and extreme, and in some cases the outer ear was injured. There are also examples.

No. 03-49690 JP 2004-208754 A Japanese Patent Application No. 2007-319150

Therefore, the present invention stabilizes the head of a subject by using panoramic tomography, tomography, cephalo X-ray imaging, and CT imaging alone or in a type of X-ray imaging apparatus that can use a part or all of them. In addition, in the conventional ear rod type head standard fixing device that emphasizes standardity and reproducibility, the structure of the ear rod itself is rather difficult to break even if a certain amount of load is applied. In contrast to the conventional case, the present invention is the opposite of the conventional case from the viewpoint of the subject even in the case of the sudden cases as described above. When the same case occurs while maintaining standardity and reproducibility, the ear rod part for the subject that can suppress the damage to the subject as much as possible is used. For examiner-friendly X-ray equipment And to provide a part standard fixing device.

In order to achieve the above object, the head standard fixing device for X-ray imaging apparatus of the present application is a type in which panoramic tomography, tomography, cephalo X-ray imaging, CT imaging can be used alone or a part or all of them can be used in combination. The head standard fixing device used in the X-ray imaging apparatus of the above-mentioned, and through the ear rod arm made of a material having high X-ray permeability that can be opened and closed symmetrically, In order to ensure reproducibility, the shape of the ear rod that is inserted into the outer ear hole of the subject is easy to break when a force exceeding a certain load acts on the root portion near the joint with the ear rod arm. It is characterized by having been subjected to.

Preferably, the ear rod is easily broken at the root portion near the joint portion with the ear rod arm when a force of a certain load or more is applied to the root portion near the joint portion with the ear rod arm. As a shape, a substantially V-shaped groove is provided on the outer periphery thereof.

Preferably, the ear rod includes a fitting portion of an ear rod portion, a hook-shaped portion, and the ear rod arm, and a substantially V-shaped groove provided in a base portion of the ear rod is The tip of the substantially V-shaped groove is provided between the ear rod portion and the hook-shaped portion so that the tip of the substantially V-shaped groove enters the surface so that sharp protrusions do not appear on the surface. .

Preferably, the ear rod is broken when a preset load of 800 g to 2 kg is applied to the notch.

Preferably, the ear rod has an ear rod having a selected ear rod selected from a plurality of preset loads in a range of 800 g to 2 kg in the notch portion. Each part can be attached to and detached from the head standard fixing device.

Preferably, the ear rod selectively selects an ear rod from a plurality of preset loads in a range of 800 g to 2 kg in the notch, and the ear rod is connected to the ear rod arm. It is characterized by being removable.

Ear rods inserted into the external ear canal of a subject of a head fixing device for a three-point fixing method for X-ray imaging devices, which has been conventionally used with a focus on standardity and reproducibility when imaging the head and neck region When the load is more than a certain level, the ear rod itself is the root of the connection part, and the ear rod has a notch that makes it easy to break without leaving sharp protrusions. By adopting a structure provided on the outer periphery of the slab, the conventional problems are solved by distinguishing from the conventional system.

In addition, in the past, when the ear rod was broken, it was considered that the strength was weak, and consideration was given to make it difficult to break. Standard required for imaging of the head and neck region that is gentle on the subject's line of sight without subjecting the subject to excessive damage by breaking the ear rod itself at the base of the connection when the load is applied It is possible to provide a head fixing device for X-ray imaging that emphasizes reproducibility and reproducibility.

Embodiment of digital panorama / cephalo combined X-ray imaging apparatus having X-ray imaging head fixing apparatus using ear rod according to the present invention Embodiment of X-ray CT imaging apparatus for FPD type head and neck having X-ray imaging head fixing apparatus using ear rod according to the present invention Embodiment of X-ray panorama / CT imaging apparatus combined with FPD / CCD having X-ray imaging head fixing device using ear rod according to the present invention Detailed view of an embodiment of a panoramic head standard fixing device using an ear rod according to the present invention and an embodiment of an ear rod 1 is a detailed view of an embodiment of a head standard fixing device for cephalo imaging using an ear rod according to the present invention and an embodiment of an ear rod.

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall view of an embodiment of a dental digital panorama / cephalo combined X-ray imaging apparatus having an X-ray imaging head fixing apparatus using an ear rod according to the present invention. FIG. The front view, FIG. (B) is a left side view, and FIG. (C) is a plan view. This apparatus positions and fixes a subject's head on a panoramic imaging head standard fixing device 1 provided on the panoramic imaging apparatus side, and a single strip-shaped CCD sensor disposed opposite to a turning arm 2. Panorama shooting is performed by rotating the pivot arm 2 for panoramic imaging using the unit 4 and the X-ray generator 3, and the CCD sensor unit 4 is removed from the panoramic imaging side, from the vertical sliding unit The head of the subject is positioned and fixed in the same manner as described above to the head standard fixing device 9 used for cephalo imaging provided on the side of the cephalo imaging means 8 provided at the end of the arm extending in the horizontal direction. The panorama / cephalo combined X-ray imaging apparatus that performs 1.1 × cephalometric imaging, and the ear rod portion 9a is commonly used for the head standard fixing device 9 used for cephalometric imaging. In the case of photographing, the head of the subject is used by using the ear rod portion 1a at the time of photographing such as temporomandibular joint two-part photographing or temporomandibular joint four-part photographing, which requires standardization for positioning of the subject head according to the photographing mode. Ears provided in the head standard fixing device 1 for panoramic photography and the head standard fixing device 9 used for cephalometric photography in order to fix the image stably and with standardity as necessary. The shape of the ear rod 1b of the rod portion 1a and the shape of the ear rod 9b of the ear rod portion 9a is improved as will be described in detail later. Contrary to the conventional structure, the ear rod is easily broken when a certain load is applied. It was.

FIG. 2 is an overall view of an embodiment of an FPD type X-ray CT imaging apparatus for head and neck having an X-ray imaging head fixing apparatus using an ear rod according to the present invention, and FIG. FIG. 4B is a partial sectional view of the right side surface, and FIG.

In the figure, since the FPD type X-ray sensor 14 has a maximum effective field size as large as about 300 mm × 300 mm, its image reconstruction range is, for example, a maximum diameter of 200 mm × a height of 180 mm to a minimum diameter. An image reconstruction range suitable for diagnostic purposes was alternatively selected from a plurality of preset reconstruction ranges between 30 mm × height 30 mm, and the subject was placed opposite to the swivel arm 12. The X-ray generator 13 and the X-ray sensor 14 can turn the pyramid-shaped cone beam X-ray irradiated from the X-ray generator 13 horizontally, for example, 180 ° or 360 ° via the turning arm 12. In addition to reconstruction of CT images including 3D images and panoramic images from the image data for the angle, for example, reconstruction of a Cephalo image with an enlargement ratio of 1.1 times by applying the Latham method is also necessary. A digital panorama / cephalo / CT type device that can also perform digital panorama shooting according to this device, and this device is also used for taking pictures in order to fix the subject's head in a stable and standardized manner. The shape of the ear rod 11c (9c in FIG. 5) of the ear rod portion 11a (9a in FIG. 5) provided with the head standard fixing device 11 is improved as described in detail later, and is opposite to the conventional case. In addition, the ear rod has a structure that easily breaks when a certain load is applied.

Further, the left and right ear rod portions 11a provided in the head standard fixing device 11 so as to be openable and closable are used as a reference when reconstructing the Cephalo photograph image by the Latham method. The part is provided with a marker 11g such as a titanium sphere.

FIG. 3, which extends in the horizontal direction from the upper and lower sliding parts, uses both cone beam X-rays having a head fixing device for X-ray imaging using ear rods according to the present invention and strip-shaped panoramic X-rays. FIG. 1 is an overall view of an embodiment of an FPD / CCD combined X-ray panorama / CT imaging apparatus. A small PPD sensor 4 ′ and a strip-shaped CCD sensor (not shown) are used in combination, and the small PPD sensor 4 ′ is mainly used. This is a panorama / cephalo / CT combined device for taking panoramic and cephalometric imaging with a strip-shaped CCD sensor. The end of an arm that extends horizontally from the vertical sliding part. A panoramic / Cephalo combined X-ray imaging apparatus that mounts on the side of the Cephalo imaging means 8 provided on the side and performs Cephalo imaging at a magnification of 1.1 times includes the strip-shaped CCD sensor. Addition to use as, it is also possible to carry out the reduction of imaging time by using the FPD type large sensor as a selection device. Similarly to FIG. 1, this apparatus is also equipped with a head standard fixing device 1 ′ for panoramic imaging in order to fix the head of a subject stably and with standardity as necessary, and cephalometric imaging. A head standard fixing device 9 ′ used for the panoramic photographing, and a head standard fixing device 9 ′ used for the cephalometric photographing. As will be described in detail later, the shape of the ear rod 1a, the ear rod 1b of the ear rod 9a, and the ear rod 9b was improved to make it easy to break, contrary to the prior art.

FIG. 4 shows a head of a type in which the subject is positioned so that the operator and the subject used in the panoramic imaging and CT imaging of the FPD / CCD combined X-ray panorama / CT imaging apparatus of FIG. 3 face each other. The detail of one Example using the ear rod 1b of this invention for the part specification fixing apparatus 1 'is demonstrated. Fig. (A) is a plan view, Fig. (B) is a side view, and Fig. (C) is a detailed view of the ear rod 1b. In FIGS. 2 (a) and 2 (b), the base 20 is inserted into the outer ear hole of the subject so that the subject can be positioned stably while maintaining standardity and reproducibility. An opening / closing means (not shown) that can be freely opened and closed is provided with an ear rod portion 1a that is detachable, a knob handle 21 for opening and closing the ear rod portion 1a, and a subject that is slidable up and down. The chin rest 22 and only a part of the chin rest 22 are shown, but the support for supporting the frontal portion of the subject or the nadion provided detachably with respect to the base 20 as required. Means 23, subject handle 24, electrical operation unit 27 necessary for positioning of the subject, aiming laser beam 8 for instructing the reference position of the front tooth portion during panoramic photography, Also, a laser beam to indicate the subject's midline 1 is provided.

The above-described ear rod portion 1a is configured by a pair of support arms 1b and an ear rod 1c that can be opened and closed symmetrically with respect to the midline portion of the subject. The ear rod 1c is shown in FIG. As shown, the insertion portion inserted into the support arm 1b, a stepped flange portion 1d, and a portion 1e inserted into the subject's outer ear hole, the stepped flange portion 1d, A notch 1f is provided around the boundary with the portion inserted into the outer ear canal so that the ear rod 1e can be easily broken when a load of a certain level or more is applied as shown in the figure. In addition, this notch has a substantially V-shape with an angle on the flange side in order to avoid as much as possible that a sharp protrusion remains on the flange portion even if it is folded, resulting in injury to the subject. It is cut. Accordingly, there is an effect that it is possible to avoid injuring the subject without causing sharp protrusions on the flange portion. In the drawing, if necessary, a pad-type temporal head presser can also be used by exchanging with the ear rod portion 1a.

FIG. 5 is a detailed view of an embodiment of a cephalo imaging head standard fixing device using an ear rod according to the present invention and an embodiment example of an ear rod. The cephalo imaging means 8 provided at the end of the arm 10 extending in the horizontal direction from the parts 5 and 5 ′ is provided, and the cephalo imaging means 8 stably and standardizes the subject's head. A head standard fixing device 9 is provided for holding and fixing the head.

When the imaging mode is selected at the time of cephalometric imaging, the positional relationship necessary for cephalometric imaging such as the horizontal rotation angle of the X-ray generator, etc., to the position of the front and rear of the arm and the angle thereof set in advance for cephalometric imaging Is automatically set.

The left and right ear rod portions 9a provided in the head standard fixing device 9 can be opened and closed, and a vertical line perpendicular to a straight line connecting the X-ray source and the center of the left and right ear rod portions 9a (on both sides of the subject) It is configured so that it can be rotated at least 90 [deg.] So that a front image and a side image of a normal subject can be photographed around the center of the ear canal and the midline. In addition, the photographing at this time is configured so as to be able to perform a cephalo photographing with an enlargement ratio of 1.1 times.

In FIG. 2C, the ear rod 9c includes an insertion portion with respect to the ear rod arm 9b, a portion 9e inserted into the outer ear hole of the subject, a flange portion 9d having a step, and a flange portion having the step. A notch 9f is formed so that the ear rod 1e can be easily broken when a load of a certain level or more is applied to the periphery of the boundary between 9d and the portion 9e inserted into the subject's outer ear hole, for example, as shown in the figure. It is provided. In addition, this notch has a substantially V-shape with an angle on the flange side in order to avoid as much as possible that a sharp protrusion remains on the flange portion even if it is folded, resulting in injury to the subject. It is cut. Accordingly, there is an effect that it is possible to avoid injuring the subject without causing sharp protrusions on the flange portion.

Also, the ear rod portion 11a shown in FIG. 2 is basically the same as the ear rod portion 9a shown in FIG. 4, and by changing the shape of the ear rod arm 9b to 11b, the ear rod portion 11a shown in FIG. A notch 9f is provided so that the ear rod 1e can be easily broken. In addition, this notch has a substantially V-shape with an angle on the flange side in order to avoid as much as possible that a sharp protrusion remains on the flange portion even if it is folded, resulting in injury to the subject. It is cut. In addition, as described above, there is no sharp protrusion on the flange portion, and there is an effect that it is possible to avoid injury to the subject.

  In FIGS. 4 and 5, plastic is generally used as the material of the ear rod. However, for example, wood may be used. It is not necessary to be concerned with the above-described example as long as the structure brings about an effect including notches for avoiding injury as much as possible. In addition, as a result of returning to the basic posture of emphasizing the subject, the present invention has attempted to solve the problems that have been difficult due to the idea from a viewpoint different from the conventional one.

DESCRIPTION OF SYMBOLS 1 Head standard fixing apparatus 1a used for panoramic imaging Ear rod part 1b Ear rod arm 1c Ear rod 1d Stepped flange part 1e Outer ear hole insertion part 1f Notch part 2 Turning arm 3 X-ray generator 4 X-ray sensor 4 ' Small FPD sensor / CCD sensor 5 Vertical sliding body 8 Cephalo imaging means 9 Head standard fixing device 9a used for cephalometric imaging Ear rod part 9b Ear rod arm 9c Ear rod 9d Stepped flange part 9e Outer ear hole insertion part 9f Notch DESCRIPTION OF SYMBOLS 10 Cefaro arm 11 Common type head specification fixing apparatus 11a Ear rod part 11b Ear rod arm 12 Turning arm 13 X-ray generator 14 FPD type X-ray sensor

Claims (6)

  A panoramic tomography, tomography, cephalo X-ray imaging, CT imaging is a head standard fixing device used for an X-ray imaging apparatus that can be used alone or in combination with some or all of these, and opens and closes symmetrically When positioning the subject's head through the ear rod part made of a material with high X-ray transparency, it is inserted into the subject's outer ear hole to ensure standardity and reproducibility. The head standard fixing device for X-ray imaging apparatus, characterized in that the ear rod has a shape that makes it easy to break when a force exceeding a certain load is applied to the root part near the joint with the ear rod arm. .   As the shape for making the ear rod easy to break at the root portion near the joint portion with the ear rod arm when a force of a certain load or more acts on the root portion near the joint portion with the ear rod arm, The head standard fixing device for an X-ray imaging apparatus according to claim 1, wherein a substantially V-shaped groove is provided on an outer periphery thereof. The ear rod is composed of a fitting portion between a stepped flange portion of the ear rod and the ear rod arm, and the substantially V-shaped groove provided in the base portion of the ear rod has a sharp protrusion when it is bent. The tip of the substantially V-shaped groove is provided so as to enter the flange portion side between the stepped flange portion of the ear rod so as not to come out on the surface. 3. A head standard fixing device for an X-ray imaging apparatus according to 1 or 2. The head standard fixing device for an X-ray imaging apparatus according to claim 1, wherein the ear rod is bent when a preset load within a range of 800 g to 2 kg is applied to the notch. . The ear rod selects an alternative ear rod from a plurality of preset loads within a range of 800 g to 2 kg at the notch, and each ear rod having the selected ear rod includes the head The head standard fixing device for an X-ray imaging apparatus according to claim 1, wherein the standard fixing device can be attached to and detached from an opening / closing means of the standard fixing device. The ear rod can be selectively selected from a plurality of preset loads within a range of 800 g to 2 kg at the notch, and the selected ear rod can be attached to and detached from the ear rod arm. The head standard fixing device for an X-ray imaging apparatus according to claim 1, wherein the head standard fixing apparatus is an X-ray imaging apparatus.

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