JPH01170443A - Total jaw x-ray imaging apparatus - Google Patents

Abstract

PURPOSE:To prevent the generation of an indistinct part on an obtained image, by providing the dental arch shape detector connected to a microcomputer on-line or off-line and transmitting the data thereof to the microcomputer to control X-ray imaging. CONSTITUTION:A dental arch shape detector 14 is inserted in the oral cavity of a patient to be bitten by upper and lower teeth. various conditions necessary for imaging are set by an operation machine 1 and, when an imaging order is emitted, a total jaw X-ray imaging machine 12 starts imaging and data are transmitted to a microcomputer on-line or off-line from the dental arch shape detector 14 in the oral cavity and the microcomputer performs control so that imaging is performed under the imaging condition fitted to the dental arch shape of the patient. The dental arch shape detector 14 is bitten by teeth and, when the electrodes are brought into contact with the teeth, a current flows between the electrodes and, when a change of a current is detected, the part bitten by teeth and the bitten state thereof can be judged. By the above mentioned constitution, the imaging fitted to the dental arch shape of a specific patient can be performed and no indistinct part is generated in an obtained photograph.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention provides a full-mouth X-ray imaging device 4 used for dentistry, etc.
This person, especially the full-jaw X, which has automated part of the shooting operation.
This invention relates to a radiography device.

(Prior Art and Problems to be Solved by the Invention) Conventionally, a full-mouth X-ray imaging device has been known as an X-ray device for dentistry, etc., and when this device is used, it is possible to examine the entire upper and lower dentition at one time. X
Line photography is possible.

In this type of photography, the rotation of the horizontal arm of the device, movement of the rotation axis, tube current, tube voltage, film feed speed,
It is desirable to set conditions such as film density to suit the patient, and for this purpose, a method is being implemented in which a certain standard dental arch prepared in advance is adopted as the standard condition settings and photographed. The standard dental arches are available in one type or only in three types: large, medium, and small.

For this reason, regardless of the patient who fits the standard dental arch,
Many X-ray photographs of general patients have a problem in that some portions are out of focus.

In other words, there is a m: part between the tomographic locus of the horizontal arm 1 (determined by the rotation and movement of the horizontal arm) corresponding to the standard dental arch and the dental arch locus of the subject or patient. , a discrepancy occurs, but this discrepancy becomes an out-of-focus X-ray photograph.

The present invention provides a full-mouth X-ray imaging device that can set a dental arch trajectory suitable for each patient and perform custom-made X-ray photography. No imaging blur occurs due to a mismatch between the horizontal arm tomographic locus corresponding to the arch and the dental arch locus of the subject or patient.

(Means for Solving the Problems) The present invention solves the above problems, namely, a microcomputer consisting of an operating device, an input/output interface section, a CPU (central processing unit), a memory, etc. The full-mouth X-ray imaging device is equipped with an X-ray imaging device, a control circuit, a drive source, etc. for the full-jaw X-ray imaging device, and the X-ray imaging is controlled by the microcomputer. A tooth row shape detector is provided, and the information or data from the tooth row shape detector is transmitted to the microcomputer.
It is designed to control radiography.

(Function) With this configuration, accurate information or data regarding the shape of a specific patient's dentition etc. is automatically transmitted to the microcomputer during full-mouth X-ray photography.
There were no out-of-focus areas in the X-ray photographs obtained after that.
Also, inputting these data is easy.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 is a block diagram of a full-jaw X-ray imaging apparatus that is an embodiment of the present invention.

In the figure, reference numeral 1 denotes an operating device, which includes a keyboard, various operating switches, and the like. 2 is an input/output interface unit (I10>, 3 is a CPU (central processing unit), 4 is
is a ROM (ROM) that stores various programs and data, etc.
5 is a RAM (memory that can be written at any time) and stores information, data, etc. read through the input/output interface section 2, or
It is used to temporarily store data necessary for X-ray photography.

6 is an address bus, 7 is a data bus, and 8 is a control bus, which constitute the main part of the microcomputer.

This control bus 8 informs the ROM 4, input/output interface section 2, other memories, etc. of what the CPU 3 is currently doing, and also informs the state of the CPU 3. This is a transmission path for transmitting control signals for notification.

9 is a drive control circuit; 10 is a drive source such as a motor;
These drive the arm, X-ray film, etc.

11 is an imaging condition control circuit; 12 is a full-jaw X-ray imaging machine; 13
A detector is installed in a part of this full-jaw X-ray imaging machine, and detects whether or not X-ray imaging is being performed under set imaging conditions, and transmits a signal to the microcomputer.

Reference numeral 14 denotes a dentition shape detector, which is inserted into the patient's oral cavity and chewed during imaging.In this state, information or data regarding the patient's dentition shape is transmitted online via the input/output interface section 2 to the microcontroller. The information is transmitted to a computer, and based on this information or data, X-ray photography is automatically performed.

Next, the operation of X-ray photography will be explained. First, the patient is asked to come to a predetermined imaging position, insert the dentition shape detector 14 into the oral cavity, and chew with the upper and lower teeth.

In this state, the operating device 1 is operated to set various conditions necessary for X-ray photography. Thereafter, when an X-ray photographing command is issued, the full-jaw X-ray photographing machine 12 starts X-ray photographing. During this X-ray imaging, information or data is transmitted online from the dentition shape detector 14 inserted into the patient's oral cavity to the microcomputer. Based on this, control is performed so that imaging is performed under imaging conditions that match the shape of the dentition in mind.

2I21 is a diagram showing the principle of one specific example of the tooth arrangement shape detector used in the present invention, (A) is a plan view, (B) is a diagram taken along the X-Y line of (A). FIG.

In this dentition shape detector, an upper insulating substrate 20 and a lower substrate 21 face each other with a predetermined distance therebetween. On the back surface of the upper substrate 20, a large number of elongated band-like or linear electrodes 22 made of carbon, conductive film, etc. are provided at predetermined intervals. Further, a large number of electrodes 23 are provided on the lower substrate 21 as well as on the upper substrate.

These substrates are arranged such that the electrodes face each other internally and are spaced apart from each other at regular intervals, and the electrodes 22 and 23 are arranged in such a relationship that they intersect at right angles to each other when viewed from the top 6, i.e. , electrodes are arranged in a matrix shape.

24 is an upper surface connector provided at the end of the upper surface side substrate 20, and is connected to the electrode 22;
connected to the microcomputer via. 25 is a bottom connector provided at the end of the bottom board 21;
Connected in the same way as the top connector.

Moreover, the upper surface side substrate 20 and the lower surface side substrate 21 are kept at a constant distance by a spacing piece 26 in their periphery, and when this is inserted into the oral cavity and bitten with the upper and lower teeth, the substrate 20 and 21 bend each other so that electrodes 22 and 23 come into contact with each other.

In other words, the electrodes in the portions that are pressed strongly between the teeth during chewing come into contact with each other at the top and bottom.

Therefore, in use, one of the upper and lower electrodes is used as a scanning electrode, and the other electrode is used as a detection electrode.

Then, by sequentially applying a scanning pulse voltage to the scanning electrodes to perform line-sequential scanning, a detection current can be extracted from the detection electrodes.

That is, when the two electrodes come into contact with each other at the intersection of the teeth, a current flows between the scanning electrode and the detection electrode at the intersection.

This current fluctuates depending on the contact resistance between the two electrodes when they are bitten by teeth, the resistance of the electrodes themselves, etc. When bitten strongly, a large current flows, and when bitten weakly, a small current flows. flows.

Therefore, by detecting the above-mentioned current change, it is possible to determine which part is bitten and pressed by the teeth and how.

Therefore, by transmitting such current changes to a microcomputer or the like, the shape of the patient's dentition can be detected online.

In addition, in the above current detection, if many intersection points are pressed by the teeth, there will also be current flowing from areas other than the intersection between the two electrodes to be detected, but if the two electrodes are pressed and come into contact By adjusting the resistance value to an appropriate value, it is possible to perform a practically sufficient detection.

In this case, the dentition shape detector is fixed near the conventional bite block position, and its X-ray beam passing portion is made of a material with good X-ray transparency, such as a conductive film, carbon fiber material, or plastic. Needless to say, it is.

The above is an example of transmitting the tooth shape in real time, but the data detected by the tooth shape detector is temporarily stored in a memory connected to a microcomputer.
Afterwards, X-ray photography may be performed. In this case, the operation of the X-ray device after detecting the shape of the dentition and storing it is the same as in the conventional method, but as in the previous example, the X-ray device operation, the optimal imaging conditions for that patient can be obtained.

In addition, IC-RAM is used as a storage means for tooth row shape data.
A card may also be used, in which case the dentition shape detector is
It is not directly connected to the line itself (offline), and the IC
- Data will be sent and received through the RAM card.

<Effects of the Invention> As explained above, a microcomputer consisting of an operating device, an input/output interface unit, a CPU (central processing unit), a memory, etc., a full-jaw X-ray machine, and this full-jaw X-ray machine A full-mouth X-ray imaging apparatus is equipped with a control circuit, a drive source, etc., and X-ray imaging is controlled by the microcomputer, and a dentition shape detector connected online or offline to the microcomputer is provided. According to the full-mouth X-ray imaging apparatus of the present invention, in which information or data from the row shape detector is transmitted to the microcomputer to control X-ray photography, information or data regarding the shape of a specific patient's dentition can be transmitted to the microcomputer to control X-ray photography. , so to speak, custom-made information and data are transmitted to the microcomputer, so X-rays can always be taken that match the shape of a specific patient's dentition.
Therefore, the obtained X-ray photograph does not have out-of-focus areas.

Furthermore, selection errors do not occur when selecting standard dental arch setting conditions of large, medium, and small.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a full-mouth X-ray imaging apparatus that is an embodiment of the present invention, and FIG. 2 is a principle diagram of a specific example of a dentition shape detector used in the present invention. 3...CPU 4...ROM
5...RAM 6...Address bus 7
... Data bus 8 ... Control bus 9 ... Drive control circuit 10 ... Drive source X1 ... Imaging condition control circuit 12 ... Full jaw χ-ray imaging machine 13 ... Detector 14 ... Tooth shape detector 20 ... Upper surface side substrate 21 ... Lower surface side substrate 22 ... Electrode
23...Electrode 24...Top connector
25... Bottom connector 26... Spacing piece

Claims (1)

[Claims] A microcomputer consisting of an operating device, an input/output interface section, a CPU (central processing unit), memory, etc.
It is equipped with a full-jaw X-ray camera, a control circuit, a drive source, etc. for the full-jaw X-ray camera, and the X-ray machine is controlled by the microcomputer.
A dentition shape detector connected online or offline to the microcomputer is provided in a full-mouth X-ray imaging device in which radiography is controlled, and information or data from the dentition shape detector is transmitted to the microcomputer. A full-jaw X characterized by transmitting data to control X-ray photography.
Ray imaging device.