JP6195441B2 - Imaging field confirmation plate of rotary arm type dental X-ray CT diagnostic apparatus, rotational arm type dental X-ray CT diagnostic apparatus, and imaging field confirmation method of rotary arm type dental X-ray CT diagnostic apparatus - Google Patents

Imaging field confirmation plate of rotary arm type dental X-ray CT diagnostic apparatus, rotational arm type dental X-ray CT diagnostic apparatus, and imaging field confirmation method of rotary arm type dental X-ray CT diagnostic apparatus Download PDF

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JP6195441B2
JP6195441B2 JP2012282048A JP2012282048A JP6195441B2 JP 6195441 B2 JP6195441 B2 JP 6195441B2 JP 2012282048 A JP2012282048 A JP 2012282048A JP 2012282048 A JP2012282048 A JP 2012282048A JP 6195441 B2 JP6195441 B2 JP 6195441B2
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plate
rotary arm
ray ct
diagnostic apparatus
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JP2014124287A (en
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孝則 我妻
孝則 我妻
一樹 平野
一樹 平野
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株式会社吉田製作所
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  The present invention relates to an imaging visual field confirmation plate for a rotary arm type dental X-ray CT diagnostic apparatus, a rotational arm type dental X-ray CT diagnostic apparatus, and an imaging visual field confirmation method for a rotary arm type dental X-ray CT diagnostic apparatus. It is.

  Conventionally, as a method for confirming the field of view of a cone-beam X-ray CT apparatus used for dental diagnosis, the center position of the field of view (FOV: Field Of View) viewed from the direction of the rotation center axis of the imaging system is measured with a laser. A method indicated by a laser beam from a marker may be used.

  In such a field of view confirmation method, although it is easy for the photographer to grasp the center position of the field of view, it is difficult to visually recognize the extent of the outer edge of the field of view, and the photographer is not able to recognize the dentition of the patient. When positioning is performed, there are many cases in which it fails to fit the target area within the field of view.

  In Patent Document 1, a light beam indicator 373 is arranged on the rotation axis of a support arm constituting the support means, and the light beam from the light beam indicator 373 is arranged vertically downward substantially in line with the rotation axis. A CTX radiographing apparatus configured to project toward the bite block 372 is disclosed. However, even with the above-described configuration of the CTX radiography apparatus of Patent Document 1, it is difficult to visually recognize how far the outer edge of the imaging field of view is, as in the case described above.

Japanese Patent No. 4313376

  The problem to be solved by the present invention is that, when performing X-ray imaging of a patient's dentition, the photographer can visually understand not only the center position of the field of view but also the region where the outer edge of the field of view is up to. There is no imaging visual field confirmation plate of the rotary arm type dental X-ray CT diagnostic apparatus that can be easily confirmed and can ensure the accuracy of X-ray imaging of the dentition.

  The present invention is an imaging field-of-view confirmation plate placed on a joint for positioning a patient's dentition placed in an X-ray imaging region of a rotary arm type dental X-ray CT diagnostic apparatus, wherein the rotation arm rotates. The main feature is that it consists of a transparent plate or a semi-transparent plate on which a circle having the same diameter as the field of view viewed from the central axis direction and a line representing the center thereof are drawn.

  According to the first aspect of the present invention, the patient is based on a configuration comprising a transparent plate or a semi-transparent plate in which a circle having the same diameter as the field of view of the imaging seen from the rotation center axis direction of the rotary arm and a line representing the center thereof are drawn. When performing X-ray imaging of the dentition, the photographer can easily and visually check the area of the outer edge of the imaging field of view as well as the center position of the imaging field of view. It is possible to provide an imaging field confirmation plate that can be accurate.

  According to the second aspect of the present invention, it is composed of a transparent plate or a semi-transparent plate on which a circle having two same diameters as a large and small field of view viewed from the direction of the rotation center axis of the rotary arm and a cross line representing the center thereof are drawn. Based on the configuration, when performing X-ray imaging of a patient's dentition, the photographer can easily and visually check the center position of the field of view, as well as to what area the outer edge of the field of view is, It is possible to provide an imaging visual field confirmation plate that can ensure the accuracy of X-ray imaging of a row.

  According to invention of Claim 3, the imaging | photography visual field confirmation plate which consists of a transparent board or semi-transparent board which drawn the circle | round | yen with the same diameter as the imaging | photography visual field seen from the rotation center axis direction mounted on a fitting, and the center. A light beam irradiator that is fixedly disposed on a component member at an upper position of the meshing tool and irradiates a cross light beam toward the imaging field-of-view confirmation plate disposed on the meshing tool. When performing X-ray imaging of dentition, not only the center position of the field of view, but also the rotary arm type with a function that allows the photographer to easily and visually check the outer edge of the field of view. An X-ray CT diagnostic apparatus can be provided.

According to the fourth aspect of the present invention, a transparent plate or a semi-finished plate on which a circle having two same large and small diameters as viewed from the direction of the rotation center axis placed on the engagement tool and a cross line representing the center thereof is drawn. a photographing view confirming plate made of a transparent plate, is fixedly arranged on the components of the upper position of the meshing device, the imaging field of view confirmation plate disposed about the desired site on the engagement tool for horizontally moving together with said head fixture By adding a light beam irradiator that irradiates a cross light beam toward the X-ray image of the desired part of the patient's dentition, as well as the center position of the desired part, It is possible to provide a rotary arm type dental X-ray CT diagnostic apparatus having a function that allows a photographer to easily and visually confirm to which region the outer edge of the imaging visual field centering on a desired site is.

  According to the fifth aspect of the present invention, the rotary arm type dentistry having the effect of the third aspect or the fourth aspect of the present invention is provided on the basis of the structure having the two light beam irradiators composed of the first laser marker and the second laser marker. An X-ray CT diagnostic apparatus for medical use can be provided.

  According to the sixth aspect of the present invention, photographing is performed on the basis of a configuration using a bite plate base material having a tooth-shaped portion that is formed by stacking impression materials on a bite plate base material and solidified by tooth dentition of a patient. It is possible to provide a rotary arm type dental X-ray CT diagnostic apparatus capable of further improving the visibility of a region.

  According to the seventh aspect of the present invention, a cross light beam is irradiated from the light beam irradiator to the patient's dentition positioning joint, and the cross light beam is irradiated onto the joint. Place a circle of the same diameter as the field of view seen from the direction of the rotation center axis and a field of view confirmation plate consisting of a transparent or semi-transparent plate depicting the center of the circle. The imaging field of view of the rotary arm type dental X-ray CT diagnostic device, which allows the photographer to easily and visually confirm the range of the outer edge of the imaging field only by a series of simple steps of matching the center. A confirmation method can be provided.

  According to the eighth aspect of the present invention, a cross light beam whose intersection is a desired portion of the bite plate horizontally moved from the light beam irradiator with respect to the bite plate for positioning the dentition of the patient moving horizontally. A transparent plate or semi-transparent on a bite plate irradiated with a cross light beam, depicting a circle with two diameters, the same size as the large and small field of view as seen from the direction of the rotation center axis, and a cross line representing the center An imaging field confirmation plate made of a plate is placed, and the region where the outer edge of the imaging field of view is captured is simply a series of simple steps of matching the intersection of the cross light beam and the center of the imaging field confirmation plate. It is possible to provide a method for confirming the field of view of a rotary arm type dental X-ray CT diagnostic apparatus that can be easily and visually confirmed by a person.

According to the ninth aspect of the present invention, the step of irradiating the imaging visual field confirmation plate placed on the meshing tool or the bite plate with a cross light beam is performed on the slide main body of the rotary arm type dental X-ray CT diagnostic apparatus. The effect of the invention according to claim 7 or 8, wherein the first laser marker is attached to the upper slide body to be constituted and the second laser marker is attached to the lower surface obliquely above the photographing field confirmation plate of the rotating arm. The imaging visual field confirmation method of the rotary arm type dental X-ray CT diagnostic apparatus which exhibits can be provided.

According to the invention of claim 10, the bite plate which is the engagement tool is formed on the upper surface or / and the lower surface of the dentition shape forming piece portion of the bite plate base material with an alginate impression material, a silicon rubber impression material, a polyether rubber. 10. The structure according to claim 7, wherein an impression material such as an impression material is laminated and arranged to be used as a shape having a tooth shape portion that is solidified into a dentition shape corresponding to a patient's dentition engagement with the impression material. It is possible to provide an imaging visual field confirmation method for a rotary arm type dental X-ray CT diagnostic apparatus that can achieve the effects of any of the inventions and can further improve the visibility of the imaging region.

FIG. 1 is a schematic perspective view showing the overall configuration of a rotary arm type dental X-ray CT diagnostic apparatus according to an embodiment of the present invention. FIG. 2 is a schematic enlarged perspective view of the head fixture in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment. FIG. 3 is a schematic enlarged side view showing a state in which the patient's dentition is meshed with the bite plate provided in the head fixture in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment. FIG. 4 is a schematic enlarged front view of the head fixture in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment. FIG. 5 is an explanatory view showing an example of the irradiation state of the cross light beam by the light beam irradiator in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment. FIG. 6 is a schematic partial plan view showing an irradiation state of a cross light beam by two light beam irradiators in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment. FIG. 7 is a schematic partial perspective view showing an irradiation state of a cross light beam by two light beam irradiators in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment. FIG. 8 is an explanatory view showing a process of forming a dentition shape portion for the bite plate in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment. FIG. 9 is a partial perspective view of a bite plate formed by stacking impression materials on a bite plate base material in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment. FIG. 10 is an explanatory diagram showing a process of forming the tooth shape portion on the bite plate formed by stacking impression materials on the bite plate base material in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment. FIG. 11 is a plan view of the imaging visual field confirmation plate according to the present embodiment. FIG. 12 is a schematic plan view showing a state in which a cross light beam is irradiated onto a bite plate attached to a head fixture in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment. FIG. 13 is an explanatory diagram showing a state in which the imaging field confirmation plate is placed on the bite plate in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment. FIG. 14 is an explanatory view showing a state in which the imaging visual field confirmation plate is placed on the bite plate in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment and the imaging visual field is confirmed by irradiating a cross light beam. FIG. 15 is an explanatory view showing an imaging visual field confirmation mode in a state where the head fixture and the bite plate are horizontally moved in the rotary arm type dental X-ray CT diagnostic apparatus according to the present embodiment.

  According to the present invention, when performing X-ray imaging of a patient's dentition, a photographer can easily and visually confirm the region of the outer edge of the imaging field of view as well as the center position of the imaging field of view. The purpose of providing an imaging visual field confirmation plate for a rotary arm type dental X-ray CT diagnostic apparatus capable of ensuring the accuracy of X-ray imaging of the X-ray imaging of the rotary arm type dental X-ray CT diagnostic apparatus An imaging visual field confirmation plate placed on a bite plate for positioning a patient's dentition, and a circle having two same diameters as a large and small imaging visual field viewed from the rotation center axis direction of the rotating arm This was realized by a configuration composed of a transparent plate or a semi-transparent plate in which a cross line representing the center was drawn.

  Imaging imaging confirmation plate of rotary arm type dental X-ray CT diagnostic apparatus, rotary arm type dental X-ray CT diagnostic apparatus, and rotary arm type dental X-ray CT diagnostic apparatus according to embodiments of the present invention below The visual field confirmation method will be described in detail.

  As shown in FIG. 1, the rotary arm type dental X-ray CT diagnostic apparatus 11 according to the present embodiment has a prismatic column 13 standing upright from a flat base 12, and the column 13 is supported by this column 13. 14 is supported so as to be movable up and down.

  The slide main body 14 includes a rectangular parallelepiped slide base 15, an upper slide body 16 having a rear end attached to the upper end of the slide base 15 and projecting in the horizontal front direction, and a rear end side at the lower end of the slide base 15. The lower slide body 17 projecting in the mounting horizontal front direction is integrally formed so as to exhibit a substantially U shape (or substantially reverse U shape) in a side view, and the slide base 15 and the rear end side and the lower portion of the upper slide body 16 are formed. The rear end side of the slide body 17 is fitted to the column 13 so as to be slidable in the vertical direction.

  An operation panel unit 18 for executing various operations of the rotary arm type dental X-ray CT diagnostic apparatus 11 is disposed on the side surface of the slide base 15.

  The upper slide body 16 supports a rotating arm 21 configured to have a downward U-shape so as to be rotatable around a vertical rotation center axis.

  The rotary arm 21 includes a horizontal arm 22 rotatably supported by the upper slide body 16, a first arm 23 projecting downward from one end side of the horizontal arm 22, and a lower side from the other end side of the horizontal arm 22. And a projecting second arm 24.

  Then, an X-ray generator 25 that emits cone beam type X-rays is attached to the first arm 23, and an X-ray detection unit 26 made of, for example, a CCD sensor is attached to the second arm 24 in an opposing arrangement with a predetermined interval therebetween, An X-ray imaging region for a patient's dentition and the like is formed in a region between the X-ray generator 25 and the X-ray detection unit 26.

  Further, although not shown, a rotary arm drive unit for rotating the rotary arm 21 around the rotation center axis is built in the horizontal arm 22 of the rotary arm 21.

  The rotary arm dental X-ray CT diagnostic apparatus 11 according to the present embodiment further includes a vertical drive unit that drives the slide main body 14 up and down while supporting the slide main body 14 with the support column 13.

  A chin rest portion 27 is disposed on the protruding end side of the lower slide body 17, and a head fixing tool 31 for fixing the patient's head within the X-ray imaging region is supported by the chin rest portion 27 in a vertical arrangement. doing.

  The head fixture 31 will be described in detail with reference to FIGS.

  As shown in FIGS. 2 and 4, the head fixture 31 is erected vertically upward from a lower support 32 attached to the chin rest portion 27 so as to be horizontally movable, and from both corners of the lower support 32. A pair of vertical support pieces 33, 33, and a frontal head abutting body 34 having both corners attached to the pair of vertical support pieces 33, 33 so as to be movable up and down as shown in FIGS. As shown in FIGS. 2 and 3, the head fixing belt 35 attached to the forehead abutting body 34, the upper support 36 attached to the upper ends of the pair of vertical support pieces 33, 33, A fitting device for positioning a patient's dentition mounted horizontally on the pair of vertical support pieces 33, 33 in a position between the lower support 32 and the frontal abutment 34 so as to be movable up and down. And a bite plate 37.

  The bite plate 37 uses a bite plate base material 37a made of a synthetic resin material, and as shown in FIGS. 2 and 8, attachment piece portions 37b and 37b attached to the pair of vertical support pieces 33 and 33, and attachment pieces The teeth 37b, 37b and the dentition shape forming piece 37c having a substantially horseshoe shape are formed, and the dentition shape portion 37d is formed by the patient's engagement with the dentition shape forming piece 37c. It is configured to be used.

  Alternatively, as the bite plate 37, as shown in FIGS. 9 and 10, an alginate impression material, a silicon rubber impression material, a poly An impression material 38 such as an ether rubber impression material is laminated, and the patient's dentition is meshed with the impression material 38. After the impression material 38 is solidified, the dentition is integrated with the bite plate base 37a. The tooth-shaped portion 39 having a shape may be formed and used for use.

  If the bite plate 37 having such a configuration as shown in FIGS. 9 and 10 is used, the actual imaging range can be clearly confirmed from the tooth shape portion 39, and the rotary arm type dental X-ray CT. There is an advantage that the visibility of the imaging region of the diagnostic apparatus 11 is further improved.

  Further, the rotary arm type dental X-ray CT diagnostic apparatus 11 according to the present embodiment has a cross light beam directed toward the bite plate 37 or toward the imaging visual field confirmation plate 1 placed on the bite plate 37. A light beam irradiator 20 for irradiating BM is provided.

  For example, as shown in FIG. 5, the light beam irradiator 20 is provided on the lower surface portion of the rotation center portion of the horizontal arm 22 in the rotation arm 21, toward the bite plate 37 positioned below the rotation arm 21, or It can be configured to irradiate the cross light beam BM toward the imaging visual field confirmation plate 1 placed on the bite plate 37.

  Further, as shown in FIGS. 6 and 7, the light beam irradiator 20 has a first laser marker 41 attached to the lower surface obliquely above the bite plate 37 in the upper slide body 16. 6 is applied to the bite plate 37 in a straight line from the X direction, and the rotating arm 21 is fixed at a horizontal angle in a patient-positioned state, and the rotating arm 22 is configured horizontally. A second laser marker 42 is attached to the arm 22 at an obliquely upper position with respect to the bite plate 37 and at an upper corner of the X-ray detection unit 25, and the second laser marker 42 extends the Y direction shown in FIG. It is configured to irradiate a light beam in a straight line toward the bite plate 37, thereby It may be a two configurations so as to irradiate the cross beam BM on the surface.

  As shown in FIG. 11, the imaging visual field confirmation plate 1 according to the present embodiment includes a square-shaped transparent plate (or semi-transparent plate) 2 formed using a transparent synthetic resin material (or semi-transparent synthetic resin material), for example. The diameters of the two large and small diameters of the field of view (FOV: Field Of View) in the rotary arm type dental X-ray CT diagnostic apparatus 11 viewed from the rotation center axis direction of the rotary arm 21 drawn on the transparent plate 2 are as follows. The circles C1 and C2 and a cross line CL (cross line) representing the center O thereof are further configured.

  In this imaging field confirmation plate 1, the diameter D1 of the large circle C1 is, for example, 56 mm, and the diameter D2 of the small circle C2 is, for example, 30 mm, corresponding to the imaging fields of large and small in the rotary arm type dental X-ray CT diagnostic apparatus 11. It is set.

  Next, the operation and effect of the rotary arm type dental X-ray CT diagnostic apparatus 11 according to the present embodiment will be described with reference to FIG. 12 to FIG. 14 mainly by an imaging visual field confirmation method using the imaging visual field confirmation plate 1. explain.

In the rotary arm type dental X-ray CT diagnostic apparatus 11 according to the present embodiment, when X-ray imaging of a patient's dentition is to be performed, the imaging field confirmation plate 1 is used prior to the X-ray imaging. The imaging field of view of the rotary arm type dental X-ray CT diagnostic apparatus 11 for the dentition is confirmed.
That is, first, as shown in FIG. 12, the light beam irradiator 20 provided at the center of rotation of the rotary arm or the first laser marker 41 and the second laser marker 42 as shown in FIGS. A bite plate 37 (or a configuration shown in FIG. 8) for positioning a patient's dentition in which a cross-shaped light beam BM is arranged below the center of rotation of the rotary arm 22 from the light beam irradiator 20 having a table structure. Or it irradiates toward the bite plate 37) having the configuration shown in FIG.

  In FIG. 12, the light beam BM is irradiated to the region corresponding to the third molar and the region corresponding to the central incisor in the dentition of the patient on the bite plate 37 in the cross light beam BM. The state of being present is indicated by a bold line.

  Next, as shown in FIGS. 13 and 14, the imaging field-of-view confirmation plate 1 is placed on the bite plate 37 irradiated with the cross light beam BM, and the cross from the light beam irradiator 20. The intersection of the light beams BM and the center O of the imaging visual field confirmation plate 1 are matched.

  In FIG. 14, the cross light beam BM irradiated on the bite plate 37 is indicated by a thick line.

  As a result, the radiographer operating the rotary arm type dental X-ray CT diagnostic apparatus 11 can use the cross light beam BM on the bite plate 37 shown in FIG. By visually recognizing C2, it is possible to clearly recognize the area of the circle C1 or the circle C2 as an imaging visual field area for the patient's dentition area.

  That is, when X-ray imaging is performed on the patient's dentition to be performed thereafter, the dentition portion intended for imaging of the patient is surely placed within the imaging field of view of the rotary arm type dental X-ray CT diagnostic apparatus 11. Thus, the X-ray imaging accuracy of the area can be expected.

  15, the bite plate 37 of the head fixture 31 is horizontally moved in the right direction when viewed from the front side of the rotary arm type dental X-ray CT diagnostic apparatus 11 with respect to the chin rest portion 27. 3 shows a state in which the intersection of the cross light beam BM and the center O of the imaging visual field confirmation plate 1 are matched with a desired part of the patient's dentition, that is, a part corresponding to the third molar. .

  According to the photographing visual field confirmation method using the photographing visual field confirmation plate 1 shown in FIG. 15, the circle C1 or the circle having the same diameter as the photographing visual field centered on the desired part (part corresponding to the third molar). The area C2 can be clearly recognized as an imaging visual field area for the dentition area of the patient.

  That is, in the subsequent X-ray imaging of the patient's dentition, the rotation arm type dental X-ray is set in the region of the circle C1 or the circle C2 centering on the third molar tooth to be imaged by the patient. The CT diagnostic apparatus 11 can be positioned so as to be surely contained within the range of the field of view of imaging, and the X-ray imaging accuracy for the area can be expected.

  According to the present embodiment described above, the transparent plate on which the circles C1 and C2 having the same large and small diameter as viewed from the direction of the rotation center axis of the rotary arm 21 and the cross line CL representing the center O are drawn. (Or translucent plate) When the X-ray imaging of the patient's dentition is performed on the basis of the structure composed of 2, the photographer determines not only the center position of the field of view but also the region where the outer edge of the field of view is up to. The imaging visual field confirmation plate 1 can be provided that can be easily and easily confirmed visually and can ensure the accuracy of X-ray imaging of the dentition.

  Further, according to the present embodiment, when performing X-ray imaging of a desired part of the patient's dentition, the outer edge of the imaging field centered on the desired part as well as the center position of the desired part is detected. It is possible to provide a rotary arm type dental X-ray CT diagnostic apparatus 11 having a function that allows a photographer to easily and visually confirm up to which region.

  Further, according to the present embodiment, the two light beam irradiators 20 provided at the rotation center portion of the rotation arm 21 or two units including the first laser marker 41 and the second laser marker 42 as shown in FIGS. A step of irradiating a desired portion of the bite plate 37 with a cross light beam BM from the light beam irradiator 20 having the structure, and a bite plate 37 irradiated with the cross light beam BM viewed from the direction of the rotation center axis. Placing a photographic field confirmation plate 1 comprising a transparent plate (or translucent plate) 2 depicting circles C1 and C2 having the same large and small photographic field diameters C1 and C2 and a cross line CL representing its center O; In addition, only a series of simple steps including the step of matching the intersection of the cross light beam BM and the center O of the imaging field confirmation plate 1 can capture the region where the outer edge of the imaging field reaches. Person can provide a photographic view confirming method capable of simplified easily confirmed visually.

  The field-of-view confirmation plate of the present invention is widely applicable in the field of dentistry for a dental X-ray imaging apparatus that uses a bite plate to position a patient's dentition.

DESCRIPTION OF SYMBOLS 1 Imaging | photography visual field confirmation plate 2 Transparent board or translucent board 11 Rotary arm type | mold dental X-ray CT diagnostic apparatus 12 Base 13 Support | pillar 14 Slide main-body part 15 Slide base 16 Upper slide body 17 Lower slide body 18 Operation panel part 20 Light beam irradiation Device 21 Rotating arm 22 Horizontal arm 23 First arm 24 Second arm 25 X-ray generator 26 X-ray detection unit 27 Chin rest unit 31 Head fixture 32 Lower support 33 Vertical support piece 34 Frontal head contact body 35 Head Part fixing belt 36 upper support 37 bite plate 37a bite plate substrate 37b attachment piece part 37c tooth row shape forming piece part 37d tooth row shape part 38 impression material 39 tooth shape part 41 first laser marker 42 second laser marker BM light beam C1 circle C2 circle CL crosshair D1 diameter D2 diameter O center

Claims (10)

  1. An imaging visual field confirmation plate placed on a joint for positioning a patient's dentition arranged in an X-ray imaging region of a rotary arm type dental X-ray CT diagnostic apparatus,
    Rotating arm type dental X-ray CT diagnostic apparatus comprising a transparent plate or a semi-transparent plate on which a circle having the same diameter as the field of view seen from the rotation center axis direction of the rotating arm and a line representing the center thereof are drawn. Field of view confirmation plate.
  2. An imaging visual field confirmation plate placed on a bite plate for positioning a patient's dentition arranged in an X-ray imaging area of a rotary arm type dental X-ray CT diagnostic apparatus,
    Rotating arm type dentistry comprising a transparent plate or a semi-transparent plate having a circle with two diameters the same as a large and small field of view as viewed from the rotation center axis direction of the rotating arm and a cross line representing the center thereof X-ray CT diagnostic imaging field of view confirmation plate.
  3. An X-ray generator, an X-ray detection unit provided in an opposing arrangement at a predetermined interval, and a rotary arm supported rotatably around a rotation center axis in the vertical direction by a support column and a slide body unit;
    A head fixture for fixing the patient's head inside the rotation region of the X-ray generator, X-ray detector;
    A bite for positioning a patient's dentition mounted in a horizontal arrangement on the head fixture;
    A rotary arm type dental X-ray CT diagnostic apparatus comprising:
    An imaging field confirmation plate comprising a circle having the same diameter as the imaging field of view viewed from the direction of the rotation center axis placed on the engagement tool and a transparent plate or a semitransparent plate depicting the center thereof;
    A light beam irradiator that is fixedly disposed on a constituent member at an upper position of the meshing tool and irradiates a cross light beam toward the imaging field-of-view confirmation plate disposed on the meshing tool;
    Rotating arm type dental X-ray CT diagnostic apparatus, characterized in that
  4. An X-ray generator, an X-ray detection unit provided in an opposing arrangement at a predetermined interval, and a rotary arm supported rotatably around a rotation center axis in the vertical direction by a support column and a slide body unit;
    A horizontally movable head fixture for fixing the patient's head inside the rotation region of the X-ray generator, X-ray detector;
    A bite for positioning a patient's dentition mounted in a horizontal arrangement on the head fixture ;
    A rotary arm type dental X-ray CT diagnostic apparatus comprising:
    A field-of-view confirmation plate comprising a transparent plate or a semi-transparent plate depicting a circle having two same diameters as a large and small field of view as viewed from the direction of the rotation center axis placed on the fitting and a cross line representing the center thereof; ,
    Is fixedly disposed on the components of the upper position of the meshing device, irradiates cross beam toward the imaging visual field check plate disposed about the desired site on the engagement tool for horizontally moving together with said head fixture A light beam irradiator;
    Rotating arm type dental X-ray CT diagnostic apparatus, characterized in that
  5. The light beam irradiator includes a first laser marker attached to a lower surface obliquely above a photographing field confirmation plate placed on the engagement tool in the upper slide body constituting the slide main body, and a photographing field of the rotary arm. A second laser marker attached to a lower surface obliquely above the confirmation plate, and configured to irradiate a cross light beam on the imaging field confirmation plate by the first laser marker and the second laser marker. The rotary arm type dental X-ray CT diagnostic apparatus according to claim 3 or 4, characterized in that:
  6.   The bite plate which is the engagement tool is formed by laminating and arranging an impression material such as an alginate impression material, a silicon rubber impression material, a polyether rubber impression material on the upper surface and / or the lower surface of the dentition shape forming piece portion of the bite plate base material. The rotary arm type dental X-ray CT according to claim 3, further comprising a tooth-shaped portion solidified into a dentition shape corresponding to the dental dentition of the patient with the impression material. Diagnostic device.
  7. A method for confirming an imaging field of view of a rotary arm type dental X-ray CT diagnostic apparatus for confirming an imaging field of view as viewed from the direction of the rotation center axis of the rotary arm in the rotary arm type dental X-ray CT diagnostic apparatus,
    The patient's dentition arranged in a state of being supported by a head fixture that fixes the patient's head inside the rotation area of the X- ray generator and the X-ray detection unit below the rotation center of the rotation arm. Irradiating a cross-shaped light beam from a light beam irradiator fixedly disposed on a constituent member at an upper position of the engagement tool with respect to the positioning engagement tool;
    A photographing field confirmation plate made up of a circle having the same diameter as the photographing field viewed from the rotation center axis direction and a transparent plate or a semi-transparent plate depicting the center thereof is placed on the engagement tool irradiated with the cross light beam. Steps,
    By matching the intersection of the cross light beams from the light beam irradiator and the center of the imaging field confirmation plate, the imaging field area with respect to the dentition area of the patient is within a circle area having the same diameter as the imaging field. As a step for visual recognition of the photographer,
    A method for confirming a field of view of a rotary arm type dental X-ray CT diagnostic apparatus, comprising:
  8. A method for confirming an imaging field of view of a rotary arm type dental X-ray CT diagnostic apparatus for confirming an imaging field of view as viewed from the direction of the rotation center axis of the rotary arm in the rotary arm type dental X-ray CT diagnostic apparatus,
    Under the rotation center of the rotary arm, the X- ray generator is supported by a head fixture that fixes the patient's head inside the rotation area of the X-ray detection unit and is arranged to be horizontally movable. The bite plate horizontally moved from the light beam irradiator fixedly arranged on the constituent member above the bite plate with respect to the bite plate for positioning the patient's dentition, which is arranged and horizontally moved with the head fixture Irradiating a cross light beam with the desired part of
    From a transparent plate or semi-transparent plate on the bite plate irradiated with a cross light beam, depicting a circle of two diameters the same as a large and small shooting field viewed from the direction of the rotation center axis and a cross line representing the center thereof A step of placing an imaging field confirmation plate,
    By matching the intersection of the crossed light beams from the light beam irradiator and the center of the imaging field confirmation plate, the region of the patient's teeth is located within a circular region having the same diameter as the imaging field centered on the desired region. Providing the photographer with a visual field of view for the row area;
    A method for confirming a field of view of a rotary arm type dental X-ray CT diagnostic apparatus, comprising:
  9. The step of irradiating the imaging visual field confirmation plate placed on the engagement tool or the bite plate with a cross light beam is a first step attached to the upper slide body constituting the slide main body portion of the rotary arm type dental X-ray CT diagnostic apparatus. The rotary arm type dental X-ray CT according to claim 7 or 8, wherein the rotary arm type dental X-ray CT is performed by a laser marker and a second laser marker attached to a lower surface obliquely above the imaging field confirmation plate of the rotary arm. A method for confirming the field of view of a diagnostic apparatus.
  10.   The bite plate which is the engagement tool is formed by laminating and arranging an impression material such as an alginate impression material, a silicon rubber impression material, a polyether rubber impression material on the upper surface and / or the lower surface of the dentition shape forming piece portion of the bite plate base material. The rotary arm type according to any one of claims 7 to 9, wherein the rotary arm type is used as a shape including a tooth shape portion solidified into a dentition shape corresponding to a patient's dentition engagement with an impression material. An imaging visual field confirmation method for a dental X-ray CT diagnostic apparatus.
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