WO2011142617A2

WO2011142617A2 - Apparatus for displaying an x-ray irradiation range for a dental x-ray image photographing apparatus

Info

Publication number: WO2011142617A2
Application number: PCT/KR2011/003539
Authority: WO
Inventors: 이레나; 김영환
Original assignee: (주) 윌메드
Priority date: 2010-05-14
Filing date: 2011-05-13
Publication date: 2011-11-17
Also published as: WO2011142617A3; KR20110125822A; KR101137156B1

Abstract

The present invention relates to an apparatus for displaying an X-ray irradiation range for a dental X-ray image photographing apparatus. The apparatus for displaying an X-ray irradiation range is intended for a dental X-ray image photographing apparatus including a rotating body which rotates around the teeth of the human body, and an X-ray generator and an X-ray detector mounted on the rotating body such that the X-ray generator and the X-ray detector face each other, wherein the apparatus for displaying an X-ray irradiation range comprises: a collimator mounted on the X-ray generator to determine an X-ray irradiation range for the teeth; a light-irradiating unit which indicates the upper and lower boundaries of the X-rays irradiated through the collimator; and a controller which roughly reconciles the upper and lower boundaries of X-rays irradiated through the collimator and the irradiation range of the light irradiated from the light-irradiating unit. The above-described apparatus for displaying an X-ray irradiation range for a dental X-ray image photographing apparatus can easily check, from the outside, the X-ray irradiation range for teeth by means of the irradiation of light, the irradiation range of which corresponds to the X-ray irradiation range, and can correct the X-ray irradiation range by adjusting the collimator, thereby enabling the accurate photographing of the desired part.

Description

[Revision according to Rule 26.09.2011] X-ray irradiation range display device for dental X-ray imaging apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental X-ray imaging apparatus, and more particularly, to a dental X-ray panoramic or computerized tomography apparatus for photographing a dental region in a rotational manner.

In general, medical professionals such as dentists make diagnostic decisions through X-ray imaging with X-ray imaging equipment to detect disease (e.g., detailed dental conditions such as small caries or enlarged periodontal ligament intervals). Is doing.

In order to take an X-ray image of a tooth and jaw using a conventional X-ray imaging method, a sensor or a film is inserted into the oral cavity, an X-ray unit for intraoral X-ray imaging is placed outside the patient, and after irradiation of X-rays, the position of the sensor is again changed. Use the change method to continue reshooting.

The second method is to use a panoramic or computed tomography device to place the head of the patient between the X-ray generator and the X-ray detector, and then perform X-ray imaging with a constant frame while the X-ray generator and the X-ray detector rotate. have.

In this method, X-rays are continuously photographed by radiating, transmitting, and detecting an examinee, and a computer image is processed to determine a continuous array of teeth and maxillary or mandible as a single image.

On the other hand, the photographing apparatus requires expensive X-ray equipment that rotates about an axis, and because of the large rotation radius, a lot of space of the equipment is required. In addition, there is a disadvantage in that the amount of X-rays received by the patient is increased because the image is acquired through more than a dozen X-rays.

Such panoramic or computed tomography apparatus includes a collimator for adjusting the irradiation area of the X-rays irradiated from the X-ray generator. The collimator is a kind of diaphragm installed in the X-ray generator, and adjusts the radiation area of the X-rays irradiated to the outside while the size of the opening is adjusted.

However, the conventional apparatus has a disadvantage in that it is difficult to identify the X-ray irradiation area controlled by the collimator and radiated to the patient's teeth. That is, it is difficult to match the irradiation area of the X-ray with the portion to be photographed, and there is a problem in that the photographing is not precisely performed.

The present invention has been made to solve the above problems, to provide a dental X-ray imaging apparatus that can be accurately photographed by checking the X-ray irradiation area from the outside and correcting the X-ray irradiation area.

The X-ray irradiation range display device of the dental X-ray imaging apparatus according to the present invention is a dental panoramic imaging apparatus in which an X-ray generator and an X-ray detector are installed to face each other on a rotating body that rotates a tooth part of a human body. And a collimator installed in the X-ray generator to determine an X-ray irradiation area of the tooth region, a light irradiation unit displaying upper and lower boundary lines of X-rays irradiated through the collimator, and upper and lower boundary lines of the X-rays irradiated through the collimator and the It includes a controller for matching the irradiation area of the light irradiated from the light irradiation unit. Here, the expression matching does not mean that the two light sources are irradiated in exactly the same area. It is technically difficult for two light sources that differ in size and type and location of light sources to match completely, including at some level of error.

The light irradiation part is composed of a light source, a screw, and a driving motor, and a light output source having excellent straightness is used as the light source. For example, lasers, laser LEDs, LEDs, and the like are suitable for use as a light source. However, the light source used for practicing the present invention is not limited to the above examples.

In addition, the collimator is installed in front of the X-ray generator up and down / left and right, and the first, 2, 3, 4 control plate to form an opening for determining the viewing angle of the X-ray, the slide is coupled to each of the control plate to move the control plate A rail for guiding the first, second, third, and fourth lead screws coupled to the respective throttle plates to move the throttle plate, and coupled to the first, second, third and fourth lead screws to rotate the lead screw. Includes 1, 2, 3 and 4 drive motors.

In addition, the light irradiation unit is coupled to each of the light source disposed in each of the left and right of the collimator, the fifth and six lead screws and the fifth and six lead screws to be coupled to the lower portion of the light source to move the light source up and down And fifth and sixth driving motors that ring and rotate.

The light irradiation part may further include a light source above and below the collimator, and a lead screw and a driving motor for moving the light source.

On the other hand, the controller adjusts the opening of the collimator, the collimator upward and downward from the first vertical line (d) and the first vertical line from the X-ray light source of the X-ray generator to the virtual plane of the opening formed in the collimator Calculating vertical viewing angles θt and θb of the X-ray generator by the second vertical lines Xt and Xb, respectively, by equations θt = arctan (Xt / d) and θb = arctan (Xb / d), The position coordinates (Yt, Yb) indicating the upper and lower boundary lines with respect to the irradiation area of the X-ray generator are expressed by the upper and lower viewing angles (θt, θb) and the distance (D) from the X-ray light source to the irradiation area (Yt = Calculating each of D * tanθt, Yb = D * tanθb), and moving one light source of the light irradiation part to Yb with the coordinate of Yt.

In addition, the controller may adjust the opening of the collimator so that the X-ray of the X-ray generator can be irradiated to match the position of the light irradiated by the light irradiation unit.

The X-ray irradiation range display device for dental X-ray imaging apparatus according to the present invention as described above, by easily interlocking the X-ray irradiation area with respect to the X-ray irradiation area in conjunction with the X-ray irradiation area from the outside, and easily adjust the collimator By correcting the X-ray irradiation area can be obtained an effect that can accurately photograph the desired area.

1 is a front view of an X-ray irradiation range display device for dental X-ray imaging apparatus according to an embodiment of the present invention.

2 is a plan view of a collimator of an X-ray irradiation range display device for dental X-ray imaging apparatus according to an embodiment of the present invention.

FIG. 3 shows another embodiment of the collimator of FIG. 2.

4 is an operation of the X-ray irradiation range display device for a dental X-ray imaging apparatus according to an embodiment of the present invention.

100: inspection device 101: chair

102: jaw support 110: rotating body

120: collimator 120a: opening

121, 122, 123, 124: 1st, 2nd, 3rd, 4th throttle

125, 126: rail

131, 132, 133, 134: 1st, 2, 3, 4 lead screw

141, 142, 143, 144: 1st, 2, 3, 4 drive motor

150: light irradiation unit 151, 152: light source

155, 156: fifth and six lead screws

165, 166: fifth and six drive motors

175: X-ray generator 176: X-ray detector

Hereinafter, various embodiments belonging to the technical spirit of the present invention will be described.

1 and 2, the X-ray irradiation range display device for the dental X-ray imaging apparatus according to an embodiment of the present invention is the main configuration of the rotating body 110, collimator 120, light irradiation unit 150, controller, etc. Include as.

Referring to Figure 1, the rotating body 110 is configured to rotate the teeth of the human body. When the patient is sitting on the chair 101 in the interior of the examination device 100, chin to the jaw pedestal 102, the head of the patient is located inside the rotating body 110, Rotator 110 may rotate around the head of the patient. The rotating body 110 is rotatably coupled to the upper portion of the inspection apparatus 100 and rotated by a motor embedded in the upper portion of the inspection apparatus 100.

An X-ray generator 175 is provided on the right side of the rotating body 110, and an X-ray detector 176 is provided on the left side. The X-ray generator 175 and the X-ray detector 176 are installed on the rotating body 110 to face each other.

Although not specifically illustrated in FIG. 1, the collimator 120 installed in the X-ray generator 175 is a kind of X-ray aperture for determining an X-ray irradiation region for a tooth part, and is the same as the configuration shown in FIG. 2. The field of view seen through the collimator 120 in the X-ray generator 175 becomes an area where X-rays of the X-ray generator 175 are irradiated.

The collimator 120 typically has a rectangular adjustable opening 120a. The X-ray passes through the opening 120a, passes through the tooth portion to be examined, and reaches the X-ray detector 176 side. The light irradiation part 150 is light for displaying an X-ray irradiation area passing through the opening 120a to reach the inspection site. That is, the operator can know whether the X-ray irradiation area for reaching the patient's examination site is set correctly through the area of light reflected by the light irradiation unit 150 on the inspection site.

The light irradiator 150 is configured such that the position of the irradiated light coincides with the irradiated area of the X-rays irradiated through the collimator 120. Since the X-ray irradiation region is determined by adjusting the opening 120a of the collimator 120, the X-rays are changed by changing the positions of the

light sources

151 and 152 of the light irradiation unit 150 according to the adjustment of the opening 120a of the collimator 120. The area to which the line is to be irradiated can be directly confirmed by the light irradiated from the light irradiation unit 150. The movement of the

light sources

151 and 152 in the light irradiation unit 150 according to the opening 120a of the collimator 120 is automatically implemented by the controller.

The controller may include a microcontroller for performing motion control, a hardware including a circuit configured with various electronic components such as a driver, a filter, a converter, and a general-purpose computer for driving a communication interface and control software for controlling the hardware.

Referring to FIG. 2, the collimator 120 is installed up, down, left, and right in front of the X-ray generator 175 and includes first, second, third, and fourth adjustment plates forming an opening 120a for determining the viewing angle of the X-ray. (121, 122, 123, 124), rails 125, 126 slide-coupled to each control plate to guide the movement of the control plate, first, second, third, and fourth lead screw 131 is coupled to each control plate to move the control plate , 132, 133, 134, and first, 2, 3, and 4 drive motors 141, which are coupled to the first, second, third, and fourth lead screws 131, 132, 133, and 134 to rotate the lead screw. 142, 143, 144). The first, second, third, and

fourth control plates

121, 122, 123, and 124 are rotated by the first, second, third, and fourth driving

motors

141, 142, 143, and 144. The lead screws 131, 132, 133, and 134 can be moved independently on the

rails

125 and 126, respectively. The size of the opening 120a is adjusted by moving the first, second, third, and

fourth adjustment plates

121, 122, 123, and 124.

The light irradiator 150 is screwed to the

light sources

151 and 152 arranged at the left and right sides of the collimator 120 and the lower portions of the

light sources

151 and 152, respectively, to move the

light sources

151 and 152 up and down. And sixth lead screws 155 and 156 and fifth and sixth driving

motors

165 and 166 coupled to and rotated by the fifth and sixth lead screws 155 and 156, respectively.

Light sources

151 and 152 disposed on both sides of the collimator 120 are positioned up and down by fifth and six

lead screws

155 and 156 rotated by fifth and sixth driving

motors

165 and 166 respectively. It is possible to move. The

light sources

151 and 152 disposed on both sides of the collimator 120 may move up and down to display upper and lower boundary portions of the inspection site to which X-rays are to be irradiated.

In addition, the light irradiation unit 150 may further include a lead screw and a driving motor for moving the

light sources

151 and 152 and the

light sources

151 and 152 above and below the collimator 120. That is, the

light sources

151 and 152 disposed above and below the collimator 120 may further display the upper and lower boundary portions as well as the upper and lower portions of the inspection region to which X-rays are to be irradiated. The

light sources

151 and 152 may include a laser light source and its driving circuit or an LED light source and an LED driving circuit.

Referring to FIGS. 3 and 4, after the controller determines the viewing angle of the opening 120a, the controller adjusts the opening 120a of the collimator 120 (A1), and the collimator from the light source of the X-ray generator 175. The first vertical line d to the virtual plane V of the opening 120a formed in the 120 and the second vertical lines Xt and Xb extending upward and downward from the first vertical line to the collimator 120. Calculating the upper and lower viewing angles θt and θb of the X-ray generator 175 by the equations θt = arctan (Xt / d) and θb = arctan (Xb / d), respectively (A2), and the X-ray generator 175 Position coordinates Yt and Yb representing the upper and lower boundary lines Z1 and Z2 with respect to the irradiation area L1 of the distance D from the upper and lower viewing angles θt and θb and the X-ray light source to the irradiation area L2 (A3), and one light source (151, 152) of the light irradiation unit 150, the other by the coordinates of Yt, respectively, by the following formula (Yt = D * tanθt, Yb = D * tanθb) Yb And a step (A4) to move as the coordinates.

The controller is configured to determine the vertical angle of view of the light source of the X-ray light source θt from the first vertical line d corresponding to the distance from the X-ray light source to the collimator 120 and the second vertical lines Xt and Xb indicating the opening degree of the collimator 120. , θb) can be calculated, and the upper and lower boundary regions of the X-ray light source can be known from the vertical viewing angles θt and θb and the distance D to the irradiation area.

Therefore, the controller moves the light irradiation unit 150 to the upper and lower boundary regions of the X-ray light source to automatically illuminate the light, so that the operator checks the upper and lower boundary regions of the X-ray light source by the irradiated light and opens the collimator 120. By adjusting the accuracy, the output area of the X-rays can be aligned with the desired area.

In another embodiment, when the operator determines the inspection area by the X-ray generator 175 and moves the light irradiation unit 150 to the boundary line of the inspection area to irradiate light, the controller is controlled by the light irradiation unit 150. The opening 120a of the collimator 120 may be automatically adjusted so that the X-ray of the X-ray generator 175 may be irradiated according to the position of the output light.

As such, when the controller adjusts the opening degree of the collimator 120 in accordance with the wide area irradiated by the light irradiation unit 150, the distance D from the X-ray light source to the irradiation area and the upper and lower boundary lines of the irradiation area. Since the position coordinates Yt and Yb indicating the state are known, the upper and lower viewing angles θt and θb can be calculated inversely, and the collimator 120 can be calculated from the upper and lower viewing angles θt and θb and the first vertical line d. It is possible to calculate second vertical lines Xt and Xb indicating the degree of opening.

In summary, the operator photographs the teeth by the X-ray generator 175 in a panoramic manner by rotating the rotating body 110 while the patient to examine the teeth is sitting on the chair 101 of the inspection apparatus 100 and The teeth will be examined. At this time, the upper and lower regions of the inspection area are determined by adjusting the opening degree of the collimator 120. The light irradiation unit 150 irradiates light to the open region of the collimator 120 to visually check the upper and lower boundaries, and then, X-ray Can be investigated.

That is, since the X-ray irradiation area of the X-ray generator 175 is confirmed by the light in real time, the panorama area can be performed by looking at the irradiation area of the light and confirming the inspection area of the X-ray.

The drawings of the embodiments of the present invention described above are omitted to outline the various contour parts and mechanisms, and are schematically illustrated to easily understand the configuration belonging to the technical idea of the present invention. In addition, the embodiments are not intended to limit the technical spirit of the present invention, but are merely a reference for understanding the technical matters included in the claims of the present invention.

Claims

In the X-ray irradiation range display device for dental X-ray imaging apparatus provided with an X-ray generator 175 and an X-ray detector 176 to face the rotating body 110 and the rotating body 110 to rotate the teeth of the human body ,

A collimator (120) installed in the X-ray generator (175) to determine an X-ray irradiation area of a tooth part;

A light irradiation unit displaying upper and lower boundary lines of the X-rays irradiated through the collimator 120; And

X-ray irradiation range display device for a dental x-ray imaging apparatus comprising a controller for roughly matching the upper and lower boundary lines of the X-rays irradiated through the collimator 120 and the irradiation area of the light irradiated from the light irradiation unit.
The method of claim 1,

The collimator 120 is installed up, down, left, and right in front of the X-ray generator 175, and includes first, second, third, and fourth adjustment plates 121, 122, which form an opening 120a for determining the viewing angle of the X-ray. 123, 124;

Rails 125 and 126 coupled to the respective adjustment plates to guide the movement of the adjustment plates;

First, second, third, and fourth lead screws 131, 132, 133, and 134 coupled to the respective control plates to move the control plates; And

The first, second, third and fourth drive motors 141, 142, 143 and 144 coupled to the first, second, third and fourth lead screws 131, 132, 133 and 134 to rotate the lead screw X-ray irradiation range display device for dental x-ray imaging apparatus comprising a.
The method of claim 1,

The light irradiation unit includes one light source (151, 152) disposed on the left and right of the collimator 120, respectively;

Fifth and six lead screws 155 and 156 which are screwed to the lower portion of the light sources 151 and 152 to move the light sources 151 and 152 up and down; And

X-ray irradiation range display device for dental x-ray imaging apparatus comprising a fifth and sixth driving motors 165 and 166 coupled to the fifth and sixth lead screws 155 and 156 to rotate, respectively. .
The method of claim 3, wherein

The light irradiation unit further includes a light source 151 and 152 above and below the collimator 120, and a lead screw and a driving motor for moving the light sources 151 and 152 to display the X-ray irradiation range for the dental X-ray imaging apparatus. Device.
The method of claim 4, wherein

X-ray irradiation range display device for dental X-ray imaging apparatus, characterized in that at least one of a laser, a laser LED, LED as a light source used in the light irradiation unit
The method of claim 3, wherein

The controller adjusting the opening (120a) of the collimator (120);

A second vertical line d from the light source of the X-ray generator 175 to the virtual plane of the opening 120a formed in the collimator 120 and the collimator 120 upward and downward from the first vertical line Calculating vertical viewing angles θt and θb of the X-ray generator 175 by vertical lines Xt and Xb by equations θt = arctan (Xt / d) and θb = arctan (Xb / d), respectively;

The position coordinates (Yt, Yb) indicating the upper and lower boundary lines with respect to the irradiation area of the X-ray generator 175 are modified by the upper and lower viewing angles (θt, θb) and the distance (D) from the X-ray light source to the irradiation area. Calculating (Yt = D * tanθt, Yb = D * tanθb), respectively; And

And moving the one light source (151, 152) of the light irradiation unit (150) to the other one by the coordinate of Yt to Yb.
The method of claim 3, wherein

The controller adjusts the opening 120a of the collimator 120 so that the X-ray of the X-ray generator 175 can be irradiated in accordance with the light region irradiated by the light irradiation unit 150. X-ray irradiation range indicator for X-ray imaging apparatus.