JP6572467B2 - X-ray equipment - Google Patents

Description

  The present invention relates to an X-ray imaging apparatus used in, for example, dentistry and otolaryngology.

  For example, an X-ray imaging apparatus used in dentistry or otolaryngology is provided with a grip that is held by a subject during imaging.

  Such a grip is also provided in the X-ray imaging apparatus disclosed in Patent Document 1, and a subject holds the grip during imaging.

JP2012-217572A (see FIG. 3)

  However, the grip provided in the X-ray imaging apparatus disclosed in Patent Document 1 is merely held by the subject at the time of imaging, and in the event that the subject raises his shoulder. When taking an image, there is a possibility that a swing arm provided with an X-ray irradiation unit or an X-ray detection unit may hit the subject.

  The present invention has been developed in view of such problems of the prior art. Therefore, the main problem of the present invention is to provide an X-ray imaging apparatus having a grip that can minimize the risk that the subject who is to be photographed will have his / her shoulders lowered and the swivel arm will hit the subject. It is in.

The X-ray imaging apparatus according to the present invention includes a pair of grips held by a subject during imaging, and the grip is provided at a position lower than a shoulder of the subject during imaging. The cross-sectional shape perpendicular to the longitudinal axis of the grip has a first major axis and a first minor axis perpendicular to the first major axis, and the shape of the lower end surface of the grip is the second major axis and the second major axis. A second short axis perpendicular to the second long axis, and a virtual intersection of a pair of virtual planes including the second long axis and an intersection of the first long axis and the first short axis. lines, the and the subject from above of the subject is to pass downward, the imaginary horizontal plane and the virtual intersection line intersects contacting the lower jaw of the examinee at the time of shooting at the time of shooting A virtual point is located in the neck of the subject .

  Moreover, it is preferable to further include a chin placing member on which the subject's chin is placed.

  According to the head holding member elevating mechanism according to the present invention, the subject holding the grip naturally takes a posture of tightening the side. Raising your shoulders with your side tightened is difficult even if you try to do it deliberately. Can be minimized.

1 is a perspective view showing an X-ray imaging apparatus 10 having a grip mechanism 100 to which the present invention is applied. 3 is a perspective view showing a subject holding part 22 having a grip mechanism 100. FIG. 3 is a right side view showing a subject holding part 22 having a grip mechanism 100. FIG. 3 is a plan view showing a subject holding part 22 having a grip mechanism 100. FIG. 3 is a rear view showing a subject holding unit 22 having a grip mechanism 100. FIG. 4 is a side view showing the grip member 102. FIG. It is a side view which shows the state which decomposed | disassembled the grip member 102 into the bending part 104 and the grip 106. FIG. It is AA arrow sectional drawing in FIG. It is a BB arrow line view in FIG. 3 is a perspective view of a subject holding unit 22 including a virtual plane 250. FIG. It is a right view at the time of X-ray imaging of a subject. It is a rear view at the time of X-ray imaging of a subject. FIG. 11 is a perspective view of a subject holding unit 22 according to Modification 1 including a virtual plane 250 and a virtual horizontal plane 254. It is a right view at the time of carrying out X-ray imaging of the subject concerning the modification 1. FIG. It is a rear view at the time of carrying out X-ray imaging of the subject concerning the modification 1. FIG. It is an example of the shape (or shape of the lower end surface 200) of the cross section 150 of the grip 106 concerning the modification 2. FIG. It is an example of the shape (or shape of the lower end surface 200) of the cross section 150 of the grip 106 concerning the modification 2. FIG. It is an example of the shape (or shape of the lower end surface 200) of the cross section 150 of the grip 106 concerning the modification 2. FIG.

(Configuration of X-ray imaging apparatus 10)
Hereinafter, the grip mechanism 100 to which the present invention is applied will be described. Prior to that, an embodiment of the X-ray imaging apparatus 10 having the grip mechanism 100 will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an X-ray imaging apparatus 10 used for dentistry. The X-ray imaging apparatus 10 is roughly composed of a base 12 placed on the floor, a support column 13 erected in the vertical direction from the corner of the base 12, an elevating body 14 that moves up and down along the support column 13, A holding frame 16 provided so as to extend in the horizontal direction from the upper end of the main body 14, a swing arm 18 suspended from the lower surface of the end of the holding frame 16 opposite to the lifting main body 14 side, and the lifting main body 14 A subject frame 20 provided so as to extend substantially in parallel with the holding frame 16 from the middle in the height direction, and a subject provided on the opposite end of the subject frame 20 to the lifting body 14 side. The examiner holding part 22 is provided. The grip mechanism 100 constitutes a part of the subject holding part 22.

  The swivel arm 18 is formed in a substantially U-shape that opens downward, and an X-ray irradiation unit 24 is provided on one side of the lower end, and the other lower end facing the X-ray irradiation unit 24. An X-ray detection unit 26 is provided on the side surface. Further, the turning arm 18 rotates with respect to the holding frame 16 and its rotation shaft moves horizontally. The swivel arm 18 rotates and moves horizontally during panoramic imaging, and rotates to perform imaging during CT imaging. Of course, the X-ray imaging apparatus 10 of the present embodiment can also perform general otolaryngological imaging.

  Next, the subject holding part 22 will be described. FIG. 2 is an enlarged perspective view showing the subject holding unit 22. The subject holding unit 22 is configured to perform X-ray imaging at an accurate position by holding a subject who receives X-ray imaging. In the present embodiment, the subject holding unit 22 includes a head holding member 28 that holds the head of the subject, and a grip mechanism 100 that is gripped by the subject. In the case of the present embodiment, the head holding member 28 includes a head holding mechanism 30 that directly holds the subject's head and a chin placement member 32 on which the subject's chin is placed. Has been. The jaw placement member 32 is provided with a bite block 33 that is bitten by the front teeth of the subject during X-ray imaging.

  The head holding member 28 is not an essential configuration. Further, even when the head holding member 28 is provided, it is only necessary to have at least one of the head holding mechanism 30 and the chin mounting member 32. Whether to use the head holding mechanism 30, the chin mounting member 32, or the bite block 33 depends on the imaging method (panoramic imaging, CT imaging, general otolaryngology imaging, etc.) by the X-ray imaging apparatus 10. Should be selected.

  In this specification, when the subject's head is fixed to the head holding member 28, the direction in which the subject faces is the “front” direction, the opposite is the “rear” direction, and the right hand side of the subject is The “right” direction, the left hand side as the “left” direction, the direction away from the floor on which the X-ray imaging apparatus 10 is installed is referred to as the “up” direction, and the approaching direction is referred to as the “down” direction. Further, the head holding member 28 viewed from the elevating body 14 side is referred to as “front”, and conversely, the head holding member 28 viewed from the subject side is referred to as “back”.

(Configuration of the grip mechanism 100)
Next, the grip mechanism 100 will be described in detail. FIG. 3 is a right side view showing the position of the grip mechanism 100 in the subject holding unit 22 and the external shape of the grip mechanism 100. FIG. 4 is a plan view showing the position of the grip mechanism 100 in the subject holding part 22 and the external shape of the grip mechanism 100. FIG. 5 is a rear view showing the position of the grip mechanism 100 in the subject holding part 22 and the external shape of the grip mechanism 100. In FIG. 5, a central plane 251 that is a vertical plane extending along the longitudinal direction of the subject frame 20 is also drawn. The central plane 251 will be described in “Modification 1” described later.

  The grip mechanism 100 of this embodiment includes a pair of left and right grip members 102. Each grip member 102 has a shape obtained by bending a substantially columnar member into a “h” shape. Each grip member 102 includes a bent portion 104, a grip 106 that starts from the end of the bent portion 104 and extends to the end far from the subject, and a grip mechanism support member 108.

  The pair of grip members 102 are respectively disposed on the left and right sides of the distal end portion of the subject frame 20. More specifically, the tip of the grip mechanism support member 108 formed so as to protrude substantially horizontally outward from the bent portion 104 of the grip member 102 is made to contact both side surfaces of the tip portion of the subject frame 20. Each grip member 102 is attached to the subject frame 20.

  The bent portion 104 serves as a receiving member that receives the lower end of the head holding mechanism support column 110 that supports the head holding mechanism 30 described above. Further, the bent portion 104 is at the highest position in the grip member 102, and the grip 106 is inclined obliquely downward (see FIG. 3) so as to move away from the subject from the bent portion 104 (see FIG. 3). It extends away from the frame 20 (see FIGS. 4 and 5).

  The grip member 102 is positioned so that the position of the grip 106 is lower than the shoulder of the subject at the time of imaging.

  The configuration of the grip member 102 will be described more specifically. FIG. 6 is a view of the grip member 102 viewed from the left based on the ZZ arrow in FIG. FIG. 7 is a side view showing a state in which the grip member 102 is disassembled into the bent portion 104 and the grip 106. Further, FIG. 8 is a cross-sectional view taken along the line AA in FIG. 6 and shows the shape of the cross section 150 of the grip 106 when cut along a plane orthogonal to the longitudinal axis L of the grip 106. FIG. 9 is a BB arrow view in FIG. 6 and shows the shape of the lower end surface 200 of the grip 106.

  The bent portion 104 and the grip 106 constituting the grip member 102 can be separated from each other. Specifically, a coupling portion 112 is provided at the end of the bent portion 104 to which the upper end of the grip 106 is attached. Further, at the upper end of the grip 106, a coupled portion 114 that matches the coupling portion 112 is provided. By connecting them together, the bent portion 104 and the grip 106 can be combined to form the grip member 102.

  When the grip 106 is cut along a plane orthogonal to the longitudinal axis L of the grip 106, the shape of the cross section 150 of the grip 106 is an ellipse having a first major axis 152 and a first minor axis 154 orthogonal to the first major axis 152. It has a shape (see FIG. 8).

  The shape of the lower end surface 200 of the grip 106 is an elliptical shape having a second long axis 202 and a second short axis 204 orthogonal to the second long axis 202 (see FIG. 9).

  Further, the angles θ1 and θ2 formed by the first major axis 152 and the first minor axis 154 in FIG. 8 and the horizontal line HL in the figure, and the second major axis 202 and the second minor axis 204 in FIG. Since the angles θ3 and θ4 formed by the horizontal line HL are different from each other, it can be seen that the grip 106 has a shape like a bar having an elliptical cross section.

  Next, the shape characteristic of the grip 106 will be described using the virtual plane 250 based on the shape of the grip 106 described above. FIG. 10 is a perspective view of the subject holding unit 22 including the virtual plane 250. FIG. 11 is a right side view when the subject is X-rayed, and shows the positional relationship between the virtual plane 250 and the subject. FIG. 12 is a rear view when the subject is radiographed and shows the positional relationship between the subject and the turning arm 18.

  In each of the grips 106, assuming a virtual plane 250 including the second major axis 202 and the intersection 156 of the first major axis 152 and the first minor axis 154, a virtual intersection line 252 from the pair of virtual planes 250. Occurs. The virtual intersection line 252 passes through the subject at the time of imaging.

(Features of the grip mechanism 100)
Thus, the grip 106 of the grip mechanism 100 is provided at a position lower than the shoulder of the subject at the time of imaging, and the second long axis 202 and the intersection of the first long axis 152 and the first short axis 154 are provided. By defining the position and shape of the grip 106 so that the virtual intersection line 252 of the pair of virtual planes 250 including 156 passes through the subject at the time of imaging, the subject holding the grip 106 naturally moves aside. The posture is to tighten (see FIG. 12). Since it is difficult to raise the shoulder with the side tightened even if it is intentionally executed, the shoulder is naturally lowered when the side is tightened, so the swivel arm 18 hits the subject. The fear can be minimized.

(Modification 1)
Another element may be added to the condition of the shape of the grip 106 in the embodiment described above. FIG. 13 is a perspective view of the subject holding unit 22 including the virtual plane 250, and is a view in which “virtual horizontal plane 254” and “center plane 251 of the subject frame 20” are added to FIG. FIG. 14 is a right side view when the subject is radiographed and shows the positional relationship between the virtual plane 250, the virtual horizontal plane 254, and the subject. FIG. 15 is a rear view when the subject is X-rayed, and shows the positional relationship between the central plane 251, the virtual horizontal plane 254, the subject and the swivel arm 18.

  Assuming a virtual horizontal plane 254 in contact with the lower jaw of the subject at the time of imaging, a virtual point 256 where the virtual horizontal plane 254 and the virtual intersection line 252 described above intersect is assumed. The virtual point 256 may be located at the neck of the subject at the time of imaging.

  As a result, the virtual planes 250 are formed at substantially equal angles on the left and right with respect to the central plane 251 that is a vertical plane extending along the longitudinal direction of the subject frame 20. This makes it easier to face the frame 20. Thereby, the subject at the time of imaging can be placed in a more correct position, so that X-ray imaging with less blur can be performed.

(Modification 2)
In the embodiment described above, the cross section 150 and the lower end surface 200 of the grip mechanism 100 are elliptical, but the shape of the cross section 150 and the lower end surface 200 is not limited to this, and the first long axis 152 and the As long as the first short axis 154 and the second long axis 202 and the second short axis 204 can be recalled, for example, the rhombus shown in FIG. 16 or the drop (tear drop) shape shown in FIG. Alternatively, as shown in FIG. 18, a shape in which a major axis or a minor axis can be recalled between the sides facing each other may be used. Further, the grip 106 is shaped like a bar having an elliptical cross section, but it may be shaped without such twist.

(Modification 3)
In the above-described embodiment, the grip member 102 constituting the grip mechanism 100 is formed by the bent portion 104 and the grip 106. However, the bent portion 104 is not an essential component in the present invention, and is only the grip 106. The grip member 102 may be configured, or another member may be attached to the grip 106 instead of the bent portion 104.

DESCRIPTION OF SYMBOLS 10 ... X-ray imaging apparatus, 12 ... Base, 13 ... Support | pillar, 14 ... Elevating body, 16 ... Holding frame, 18 ... Turning arm, 20 ... Subject frame, 22 ... Subject holding member, 24 ... X-ray irradiation , 26 ... X-ray detection part, 28 ... Head holding member, 30 ... Head holding mechanism, 32 ... Jaw mounting member, 33 ... Bite block 100 ... Grip mechanism, 102 ... Grip member, 104 ... Bending part, 106 DESCRIPTION OF SYMBOLS ... Grip, 108 ... Grip mechanism support member, 110 ... Head support mechanism support, 112 ... Coupling portion (provided in the bent portion 104), 114 ... Coupling portion 150 (providing in the grip 106) (grip) Cross section 152 of mechanism 100, first long axis, 154, first short axis, 156, intersection 200 between first long axis 152 and first short axis 154, lower end surface of grip mechanism 100, 202 ... second head , 204 ... second short axis 250 ... virtual plane (of the subject frame 20) 251 ... center plane, 252 ... virtual line of intersection, 254 ... virtual horizontal plane, 256 ... virtual point

Claims (2)

An X-ray imaging apparatus provided with a pair of grips held by a subject during imaging,
The grip is provided at a position lower than the shoulder of the subject at the time of photographing,
The cross-sectional shape perpendicular to the longitudinal axis of the grip has a first major axis and a first minor axis perpendicular to the first major axis,
The shape of the lower end surface of the grip has a second major axis and a second minor axis orthogonal to the second major axis,
A virtual intersection line between a pair of virtual planes including the second major axis and the intersection of the first major axis and the first minor axis indicates the subject at the time of imaging from above the subject. It is designed to pass downward ,
An X-ray imaging apparatus , characterized in that a virtual point where a virtual horizontal plane in contact with the lower jaw of the subject at the time of imaging intersects the virtual intersection line is located at the neck of the subject . The X-ray imaging apparatus according to claim 1 , further comprising a jaw placement member on which the subject's jaw is placed.

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