Dental x-ray aligner and oral imaging method based on hall sensor technology

Abstract

This application discloses a dental X-ray alignment device and oral imaging method based on Hall sensor technology. The alignment device is used for aligning a DR sensor and a dental X-ray machine, wherein the dental X-ray machine is connected to an X-ray tube head. The alignment device includes a Hall sensor, a fixed ring, and a magnetic ring. The magnetic ring is fixedly connected to the fixed ring, which is located on the X-ray tube head, with the center of the magnetic ring and the center of the fixed ring coinciding with the center of the X-ray tube head. The Hall sensor is located on the DR sensor, and the signal communication of the Hall sensor is connected to a host computer. The Hall sensor senses the strength and direction of the magnetic field, and the position of the magnetic ring is identified by judging the strength and direction of the magnetic field. After alignment, the patient's oral cavity can be quickly, conveniently, and efficiently imaged, reflecting the depth information of the internal anatomical features of the teeth. The oral treatment process is made more intelligent, thereby improving clinical efficiency, reducing the number of imaging sessions, and reducing X-ray radiation for patients.

Description

Technical Field

[0001] This application relates to a dental X-ray alignment device and oral imaging method based on Hall sensor technology, belonging to the field of oral medical device technology. Background Technology

[0002] DR sensors and dental X-ray machines are dental medical devices used to acquire images of the oral cavity. The dental X-ray machine emits X-rays, and the DR sensor collects the images for imaging. However, the existing DR sensors and dental X-ray machines are two independent products with no interactive information. This often makes it difficult to align the DR sensor and dental X-ray machine during imaging, easily resulting in unusable images and requiring multiple repeated imaging sessions.

[0003] To address the difficulty in aligning DR sensors with dental X-ray machines, current technologies typically rely on specialized auxiliary tools for alignment. However, this approach has the following drawbacks:

[0004] 1. Alignment is achieved with specialized auxiliary tools, and medical staff must also remember how to use these tools. The steps are cumbersome and the operation process is complicated, relying entirely on the doctor's manual alignment.

[0005] 2. Multiple alignments and unsatisfactory imaging results lead to patients being exposed to more radiation;

[0006] 3. It exacerbated the patient's discomfort;

[0007] 4. It consumes more time and money;

[0008] 5. Low clinical efficiency. Summary of the Invention

[0009] The technical problem this application aims to solve is the difficulty in aligning the DR sensor with the dental X-ray machine.

[0010] To address the aforementioned technical problems, the present application provides a dental X-ray alignment device based on Hall sensor technology for aligning a DR sensor and a dental X-ray machine. The dental X-ray machine is connected to an X-ray tube head. The alignment device includes a Hall sensor, a fixed ring, and a magnetic ring. The magnetic ring is fixedly connected to the fixed ring, which is located on the X-ray tube head. The center of the magnetic ring, the center of the fixed ring, and the center of the X-ray tube head coincide. The Hall sensor is located on the DR sensor, and the signal of the Hall sensor is connected to a host computer.

[0011] Preferably, the host computer is a PC or a tablet.

[0012] Preferably, the alignment method includes displacement information calculation and orientation information calculation;

[0013] Displacement information is calculated using the following formula:

[0014]

[0015] In the formula, C is a constant, k is an adjustment value, and Bx, By, and Bz are the magnetic field strengths in three directions measured by the Hall sensor, respectively.

[0016] Directional information is calculated using the following formula:

[0017]

[0018] Preferably, the host computer obtains the relative positional relationship between the Hall sensor and the fixing ring based on displacement and direction information, and displays the alignment process of the DR sensor and the dental X-ray machine; the host computer is equipped with a screen display prompt or a buzzer prompt to indicate that the DR sensor is located within the center position of the fixing ring.

[0019] This application also provides an oral imaging method using a dental X-ray aligner based on Hall sensor technology, comprising the following steps:

[0020] Step 1: Connect the DR sensor to the host computer;

[0021] Step 2: Place the DR sensor with Hall effect sensor inside the patient's mouth;

[0022] Step 3: Move the X-ray tube head with the magnetic ring to the DR sensor to confirm its position;

[0023] Step 4: During the movement of the X-ray tube head, check on the host computer whether the DR sensor is placed within the fixing ring;

[0024] Step 5: When the DR sensor is aligned with the fixing ring, the host computer will provide a prompt.

[0025] Step 6: Press the shutter button to complete the dental X-ray.

[0026] This application utilizes Hall sensor technology to align the DR sensor and the dental X-ray machine. By sensing the strength and direction of the magnetic field through the Hall sensor, the position of the magnetic ring can be identified. This allows for quick, convenient, and efficient imaging of the patient's oral cavity, reflecting the depth information of the internal anatomical features of the teeth. This intelligentizes the oral treatment process, thereby improving clinical efficiency, reducing the number of imaging sessions, and minimizing X-ray radiation exposure for patients. Attached Figure Description

[0027] Figure 1-1 This is a schematic diagram showing the connection between the Hall sensor, DR sensor, and host computer provided in the embodiment;

[0028] Figure 1-2This is a schematic diagram of the fixing ring provided in the embodiment;

[0029] Figure 2 Schematic diagram of Hall sensor positioning principle;

[0030] Figure 3 This is a schematic diagram illustrating positioning based on displacement and orientation information obtained from a Hall sensor.

[0031] Figure 4 This is a schematic diagram showing the relative positional relationship between the DR sensor and the fixed ring, displayed on the host computer.

[0032] Reference numerals in the attached diagram: 1-Hall sensor; 2-Fixing ring; 3-DR sensor; 4-Host computer. Detailed Implementation

[0033] To make this application more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0034] This application provides a dental X-ray alignment device based on Hall sensor technology, used for the alignment of DR sensors and dental X-ray machines. The Hall sensor senses the strength and direction of the magnetic field, and the position of the magnetic ring is identified by judging the strength and direction of the magnetic field. This allows for quick, convenient, and efficient imaging of the patient's oral cavity, reflecting the depth information of the internal anatomical features of the teeth. This makes the oral treatment process more intelligent, thereby improving clinical efficiency, reducing the number of imaging sessions, and reducing X-ray radiation for patients.

[0035] For details, see Figure 1-1 and Figure 1-2 The alignment device includes a Hall sensor 1, a fixing ring 2, and a magnetic ring. The magnetic ring is circular and fixed to the fixing ring 2, which is fixed to the X-ray tube head of the dental X-ray machine, ensuring that the center of the magnetic ring, the center of the fixing ring 2, and the center of the X-ray tube head coincide. In an optional embodiment, the fixing ring 2 is a hollow shell, and the magnetic ring is disposed inside the fixing ring 2. The Hall sensor 1 is disposed on the DR sensor 3, and can be built into the DR sensor or placed independently outside the DR sensor. The signal communication of the Hall sensor 1 is connected to the host computer 4, which can be via cable or wirelessly. The host computer can be a PC or a tablet. A PC is suitable for indoor fixed oral image acquisition, while a tablet is suitable for portable mobile oral image acquisition.

[0036] Alignment method:

[0037] When Hall sensor 1 and fixed ring 2 move relative to each other in the x and y planes (the z direction does not affect the image capture, so only the relative movement of Hall sensor 1 and fixed ring 2 in the x and y planes needs to be located), the changing magnetic field will cause the Hall sensor to detect the changing magnetic field strength. The Hall sensor outputs the magnetic field strengths Bx, By, and Bz in its own coordinate system to the host computer. The host computer can then obtain the current position information of the magnetic ring through an algorithm. The measurement range of Hall sensor 1 is selected to be larger than the diameter of the fixed ring.

[0038] Displacement information calculation:

[0039] See Figure 2 As the magnetic ring moves, its position relative to the Hall element in the sensor changes. This positional shift then alters the magnetic field strength applied to the Hall element, which in turn is reflected in a change in the measured Hall voltage. Thus, the measured Hall voltage becomes an indicator of the object's position. Displacement information can be calculated using the following formula:

[0040]

[0041] The unit is mm, C is a constant, and k is an adjustment value.

[0042] When Bx and By are detected to be less than a certain reference value, it can be determined that the magnetic ring is relatively close to the central axis of the Hall sensor.

[0043] Ideally, Bx = By = 0, which indicates that the magnetic ring is aligned with the central axis of the Hall sensor.

[0044] Directional information calculation:

[0045] Based on the digital outputs Bx and By from the Hall sensor, the orientation information of the magnetic ring can be calculated using the following formula:

[0046]

[0047] The unit is Rad.

[0048] See Figure 3 Based on the displacement and heading information calculated above, the host computer can obtain and display the relative positional relationship between Hall sensor 1 and fixing ring 2, thereby displaying the alignment process of DR sensor 3 and dental X-ray machine. (See [link to relevant documentation]). Figure 4 During the alignment process of the DR sensor, the host computer displays the relative position of the DR sensor and the fixing ring in real time; when the DR sensor is within a certain range of the center position of the fixing ring, the host computer issues an alignment reminder: by displaying the "sensor aligned" prompt or by sounding a "beep" sound.

[0049] Based on the above-mentioned dental X-ray alignment device and positioning method based on Hall sensor technology, the steps for using the alignment device are as follows:

[0050] 1. Connect the DR sensor to the host computer (PC / Pad);

[0051] 2. Place the DR sensor with Hall effect sensor inside the patient's mouth;

[0052] 3. Move the X-ray tube head with the magnetic ring to the DR sensor to confirm its position;

[0053] 4. During the movement of the X-ray machine tube head, check on the host computer whether the DR sensor is positioned within the fixing ring;

[0054] 5. When the DR sensor is aligned with the fixing ring, the host computer will display "Sensor aligned" or the buzzer will sound "beep".

[0055] 6. Press the shutter button to complete the dental X-ray.

[0056] This application presents a Hall effect sensor technology that determines position by judging the strength and direction of a magnetic field. It has the following advantages:

[0057] 1. Faster, more convenient, and more efficient alignment, reducing the number of shots required;

[0058] 2. Reduce the X-ray radiation burden on patients;

[0059] 3. Short alignment time greatly reduces patient discomfort;

[0060] 4. Improve the quality of X-ray imaging and reduce the time and effort spent by medical staff due to inaccurate alignment during X-ray imaging;

[0061] 5. To make the oral treatment process more intelligent;

[0062] 6. Simple and convenient operation, improving clinical efficiency.

Claims

1. A method for intraoral imaging using a dental X-ray aligner based on Hall sensor technology, wherein the method is implemented using a dental X-ray aligner, characterized in that, The dental X-ray alignment device is used for the alignment of the DR sensor and the dental X-ray machine. The dental X-ray machine is connected to the X-ray tube head. The alignment device includes a Hall sensor (1), a fixed ring (2), and a magnetic ring. The magnetic ring is fixedly connected to the fixed ring (2). The fixed ring (2) is located on the X-ray tube head. The center of the magnetic ring, the center of the fixed ring (2), and the center of the X-ray tube head coincide. The Hall sensor (1) is located on the DR sensor (3). The signal of the Hall sensor (1) is connected to the host computer (4). Alignment methods include displacement information calculation and orientation information calculation; Displacement information is calculated using the following formula: In the formula, C is a constant, k is an adjustment value, and Bx, By, and Bz are the magnetic field strengths in three directions measured by the Hall sensor, respectively. Directional information is calculated using the following formula:

2. The oral imaging method using a dental X-ray alignment device based on Hall sensor technology as described in claim 1, characterized in that, The host computer (4) is set to PC or Pad.

3. The oral imaging method using a dental X-ray alignment device based on Hall sensor technology as described in claim 1, characterized in that, The host computer obtains the relative positional relationship between the Hall sensor (1) and the fixing ring (2) based on the displacement and direction information, and displays the alignment process of the DR sensor (3) and the dental X-ray machine; the host computer is equipped with screen display prompts or buzzer prompts to indicate that the DR sensor is located within the center position of the fixing ring.

4. The oral imaging method using a dental X-ray alignment device based on Hall sensor technology as described in claim 1, characterized in that, The oral imaging method includes the following steps: Step 1: Connect the DR sensor to the host computer; Step 2: Place the DR sensor with Hall effect sensor inside the patient's mouth; Step 3: Move the X-ray tube head with the magnetic ring to the DR sensor to confirm its position; Step 4: During the movement of the X-ray tube head, check on the host computer whether the DR sensor is placed within the fixing ring; Step 5: When the DR sensor is aligned with the fixing ring, the host computer will provide a prompt. Step 6: Press the shutter button to complete the dental X-ray.

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