Nuclear magnetic resonance head stabilizing and tremor reducing detection device

Abstract

The utility model discloses a nuclear magnetic resonance head anti -shaking tremor reduction detection device, including base, the top of base is provided with arc track, the neck fixed part of arc track is slid and is provided with, the top linear sliding of neck fixed part is provided with the sliding frame, the bottom of sliding frame is provided with scanning detection device, and scanning detection device includes head profile detection probe and detection coil, the both sides of neck fixed part and one end are provided with the fixed frame of surrounding head arrangement, be provided with three -axis mechanical arm on the fixed frame, the one end of three -axis mechanical arm is close to head and is provided with flexible contact, the utility model discloses the structure of multipoint flexible contact replaces the structure of traditional air bag plane formula contact, to the head of fixedly at the same time, guarantee the comfort of wearer, effectively avoid the situation that the detection artifact appears in the head of magnetic resonance detection process and moves.

Description

Technical Field

[0001] This invention belongs to the technical field of magnetic resonance imaging, specifically relating to a nuclear magnetic resonance head shaking reduction and vibration detection device. Background Technology

[0002] Magnetic resonance imaging (MRI) is an important non-invasive diagnostic technique. However, due to the relatively enclosed space and long examination time of MRI scans, some patients cannot maintain perfect stillness for extended periods. This is especially true for children, elderly patients, and those with movement disorders or resting tremors, where head movements can still affect the quality of the generated MRI images. This often forces technicians to repeatedly scan sequences producing motion artifacts until a clearer image is obtained, thus prolonging and wasting scan time and increasing the patient's tolerance to the examination environment and duration.

[0003] In existing technologies, to prevent head movement, fixation devices are used to secure the head. These devices typically employ airbags fixed to the occiput or both ears, with air supplied through tubing to fill the space between the head and the coil, thus fixing the head. However, the inflation volume of the airbags is difficult to quantify and accurately control due to individual head shape variations, potentially leading to insufficient or excessive inflation, resulting in inadequate or excessive head fixation. Furthermore, the airbag design itself poses a safety hazard of rupture. The head and face are vital structural and functional areas; a ruptured airbag could cause incalculable damage to the patient's jaw and face. Additionally, existing airbags are in direct contact with the head, and during prolonged, relatively enclosed examinations, sweat can easily accumulate on the skin-contact surface, causing discomfort to the patient.

[0004] Therefore, in view of the above-mentioned technical problems of using airbags to fix the head in the prior art, this utility model discloses a magnetic resonance imaging head tremor reduction detection device. Utility Model Content

[0005] This utility model discloses a magnetic resonance imaging (MRI) head shaking and tremor reduction detection device. It adopts a multi-point flexible contact structure to replace the traditional airbag planar contact structure, so as to stabilize and fix the head while ensuring the comfort of the wearer and effectively avoid detection artifacts caused by head movement during MRI detection.

[0006] This utility model is achieved through the following technical solution:

[0007] A magnetic resonance imaging (MRI) device for skeletal shaking reduction and vibration detection includes a base, an arc-shaped track at the top of the base, a neck fixation member slidably mounted on the arc-shaped track, a sliding frame linearly mounted above the neck fixation member, and a scanning detection device at the bottom of the sliding frame. The scanning detection device includes a head contour detection probe and a detection coil. Fixing frames surrounding the head are located on both sides and one end of the neck fixation member. A three-axis robotic arm is mounted on the fixing frame, and a flexible contact is located at the end of the three-axis robotic arm closest to the head.

[0008] The neck is supported and fixed by a neck fixation device. A head contour detection probe in a scanning device scans the head and facial contours, and the scan results are transmitted to an external computer to generate a 3D model of the head and face. The positional relationship between the flexible contact and the head / face is calculated based on the positional relationship between the reference points set on the neck fixation device and the 3D model. The external computer controls a three-axis robotic arm to move accordingly, causing the flexible contact to make appropriate contact with the head and face, thus fixing the human head and face. Then, magnetic resonance imaging (MRI) of the head is performed using a detection coil in the scanning device, ensuring that the relative position between the head and the detection coil remains constant throughout the entire detection process, avoiding detection artifacts caused by head movement.

[0009] It should be further noted that the above-mentioned head contour detection probe and detection coil are all existing products, and the head contour detection probe and detection coil themselves are not the technical improvement points of this application. Therefore, their specific structure and detection principle will not be described in detail here.

[0010] To better realize this utility model, the bottom of the neck fixation member is further provided with a driving member, the driving end of the driving member is connected to the bottom of the neck fixation member to drive the neck fixation member to slide along the arc track, and the neck fixation member is provided with an angle sensor.

[0011] To better realize this utility model, the driving component further includes a driving motor, a driving gear, and an arc-shaped rack. The bottom of the neck fixing component is provided with an arc-shaped rack and a slider. The output shaft of the driving motor is provided with a driving gear. The driving gear is meshed with the arc-shaped rack, and the slider is slidably connected to the arc-shaped track.

[0012] To better realize this utility model, the fixed frame is further provided with at least three sets of non-collinear three-axis robotic arms.

[0013] To better realize this utility model, the flexible contact further includes a transfer frame, a sliding column, a spring, and a contact. The transfer frame is installed on the moving end of the three-axis robotic arm. The sliding column is slidably arranged on the transfer frame. A contact is arranged at the end of the sliding column near the head. A spring is arranged between the outside of the sliding column and the transfer frame.

[0014] To better realize this utility model, the contact is further defined as any one of memory foam contact, gel pad contact, and memory latex pad contact.

[0015] To better realize this utility model, the neck fixing member further includes a neck pillow and side limiting plates. The bottom of the neck pillow is slidably connected to the arc-shaped track, and the side limiting plates are hinged to the two sides of the neck corresponding to the two sides of the neck.

[0016] To better realize this utility model, the neck pillow is further provided with ears on both sides, and the bottom of the side limiting plate is rotatably connected to the connecting hole on the ear through a hinge shaft, and a torsion spring is provided on the outside of the hinge shaft.

[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0018] This invention uses a scanning detection device to scan the head and face to obtain a three-dimensional model. Based on the positional relationship between the three-dimensional model and the flexible contact, a three-axis robotic arm is driven to move, causing the flexible contact to make contact with the head and face with an appropriate contact force. This achieves multi-point flexible contact fixation of the head, ensuring stable fixation of the head while improving the wearer's comfort. Furthermore, it ensures that the relative position between the head and the scanning detection device remains unchanged during the detection process, thereby avoiding detection artifacts caused by head movement. Attached Figure Description

[0019] Figure 1 A schematic diagram of a magnetic resonance imaging (MRI) device for detecting head shaky and tremor-reducing effects.

[0020] Figure 2 A schematic diagram illustrating the use of flexible contacts to fix the skull;

[0021] Figure 3 This is a schematic diagram of the drive component.

[0022] Figure 4 This is a structural diagram of the neck fixation device;

[0023] Figure 5 for Figure 3 A magnified view of part A.

[0024] Wherein: 1-base; 2-arc track; 3-neck fixing component; 4-sliding frame; 5-scanning detection device; 6-fixed frame; 7-three-axis robotic arm; 8-flexible contact; 9-driving component; 31-neck pillow; 32-side limiting plate; 33-torsion spring; 81-adapter frame; 82-sliding column; 83-spring; 84-contact; 91-drive motor; 92-drive gear; 93-arc rack. Detailed Implementation

[0025] Example 1:

[0026] The MRI head shaking reduction and anti-tremor detection device in this embodiment, such as Figure 1 and Figure 2 As shown, the device includes a base 1, an arc-shaped track 2 on the top of the base 1, a neck fixation member 3 slidably mounted on the arc-shaped track 2, a sliding frame 4 linearly slidably mounted above the neck fixation member 3, and a scanning detection device 5 at the bottom of the sliding frame 4. The scanning detection device 5 includes a head contour detection probe and a detection coil. Fixing frames 6 that surround the head are provided on both sides and one end of the neck fixation member 3. A three-axis robotic arm 7 is mounted on the fixing frame 6, and a flexible contact 8 is provided at the end of the three-axis robotic arm 7 near the head.

[0027] The neck fixation member 3 can slide along the arc-shaped track 2 at a certain angle, so that the neck fixation member 3 can face the neck to support and fix the neck. After the initial fixation of the neck is completed, the sliding frame 4 drives the scanning detection device 5 to move above the head. The head contour detection probe scans the head contour and facial contour, and transmits the scanning results to an external computer. The modeling software and modeling algorithm built into the external computer create a three-dimensional model of the head and face. At the same time, an initial coordinate system and reference points are preset on the neck fixation member 3. The external computer calculates the positional relationship of each flexible contact 8 relative to the head or face based on the initial coordinate system and reference points, and then controls the three-axis robotic arm 7 to perform corresponding translation and rotation, so that the flexible contact 8 can make contact with the head and face with appropriate contact force, thereby achieving multi-point flexible contact fixation of the head and face. Compared to the traditional method of fixing the head and face through surface contact with an airbag, the multi-point flexible fixation using the flexible contact 8 improves the comfort of the testing personnel. At the same time, it can more flexibly fix different head and facial contours with appropriate contact force, avoiding the problems of excessive or insufficient contact force when using traditional airbag surface contact fixation.

[0028] After the head and face are fixed by multiple flexible contacts, magnetic resonance imaging of the head can be performed through the detection coil. The cooperation of the neck fixation piece 3 and the flexible contact 8 ensures that the relative position between the head and the detection coil is fixed throughout the detection process, avoiding detection artifacts caused by head movement.

[0029] Furthermore, linear slide rails are provided on both sides above the neck fixation member 3. The sliding frame 4 is slidably mounted on the linear slide rails. A drive screw is rotatably mounted on one side of the linear slide rail. A motor is mounted on one end of the drive screw, and the drive screw is connected to a threaded hole on the sliding frame 4. The motor drives the drive screw to rotate, thereby causing the sliding frame 4 to move linearly along the linear slide rails, so as to move the scanning detection device 5 to or away from the head position.

[0030] Example 2:

[0031] This embodiment is a further optimization based on Embodiment 1, such as... Figure 3 As shown, a driving component 9 is provided at the bottom of the neck fixation member 3. The driving end of the driving component 9 is connected to the bottom of the neck fixation member 3 to drive the neck fixation member 3 to slide along the arc-shaped track 2. An angle sensor is provided on the neck fixation member 3. The driving component 9 can drive the neck fixation member 3 to slide along the arc-shaped track 2 with an angle within ±20°. At the same time, the angle sensor on the neck fixation member 3 can detect the angle between the central surface of the neck fixation member 3 and the central surface of the detection coil in real time. Based on the detected angle, the driving component 9 can be controlled to drive the neck fixation member 3 to slide by the corresponding angle, ensuring that the relative positional relationship between the head and the detection coil remains unchanged.

[0032] Furthermore, the driving component 9 includes a driving motor 91, a driving gear 92, and an arc-shaped rack 93. The bottom of the neck fixing component 3 is provided with an arc-shaped rack 93 and a slider. The output shaft of the driving motor 91 is provided with a driving gear 92. The driving gear 92 is meshed with the arc-shaped rack 93. The slider is slidably connected to the arc-shaped track 2.

[0033] The drive motor 91 drives the drive gear 92 to rotate, and through the meshing relationship between the drive gear 92 and the drive rack 93, the slider at the bottom of the neck fixing member 3 slides along the arc track 2 to adjust the deflection angle of the neck fixing member 3.

[0034] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0035] Example 3:

[0036] This embodiment is a further optimization based on the above embodiment 1 or 2, such as... Figure 1 and Figure 2As shown, the fixing frame 6 is equipped with at least three sets of non-collinear three-axis robotic arms 7. The three sets of non-collinear three-axis robotic arms 7 respectively drive the flexible contact head 8 to make non-collinear multi-point contact with the head and face. At least three contact points are equivalent to forming a contact surface, which can ensure contact comfort while also ensuring the stability of fixing the head.

[0037] The other parts of this embodiment are the same as those in Embodiment 1 or 2 above, so they will not be described again.

[0038] Example 4:

[0039] This embodiment is a further optimization based on any one of embodiments 1-3 above, such as... Figure 5 As shown, the flexible contact 8 includes an adapter frame 81, a sliding column 82, a spring 83, and a contact 84. The adapter frame 81 is installed on the moving end of the three-axis robotic arm 7. The sliding column 82 is slidably arranged on the adapter frame 81. The contact 84 is arranged at the end of the sliding column 82 near the head. The spring 83 is arranged between the outside of the sliding column 82 and the adapter frame 81.

[0040] The three-axis robotic arm 7 drives the adapter 81 to move toward the head and face until the contact 84 contacts the head and face. Under the action of the applied contact force, the slide column 82 slides to compress the spring 83. The elastic force provided by the compressed spring 83 ensures that the contact 84 has a certain preload to fit the head and face. At the same time, the compression of the spring 83 can buffer when the contact 84 contacts the head and face.

[0041] Furthermore, the contact 84 is any one of memory foam contact, gel pad contact, or memory latex pad contact, ensuring that the contact 84 can automatically return to its original shape after the contact force is removed.

[0042] The other parts of this embodiment are the same as any one of the embodiments 1-3 above, so they will not be described again.

[0043] Example 5:

[0044] This embodiment is a further optimization based on any one of embodiments 1-4 above, such as... Figure 4 As shown, the neck fixation member 3 includes a neck pillow 31 and a side limiting plate 32. The bottom of the neck pillow 31 is slidably connected to the arc-shaped track 2, and the side limiting plates 32 are hinged to the two sides of the neck pillow 31 at positions corresponding to the two sides of the neck.

[0045] The neck pillow 31 supports and fixes the neck, while the side limiting plates 32 on the left and right sides of the neck pillow 31 form a "V" shape structure to limit the neck in the left and right directions and prevent the neck from moving.

[0046] Furthermore, the neck pillow 31 is provided with lugs on both sides, and the bottom of the side limiting plate 32 is rotatably connected to the connecting holes on the lugs via a hinge shaft. A torsion spring 33 is provided on the outside of the hinge shaft. The torsional force provided by the torsion spring 33 ensures that the side limiting plate 32 can deflect towards the neck, thereby ensuring that the side limiting plate 32 can fit tightly against both sides of the neck, so as to achieve auxiliary limiting and fixation of the neck.

[0047] The other parts of this embodiment are the same as any one of the embodiments 1-4 above, so they will not be described again.

[0048] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A head movement detection device for use in a magnetic resonance head coil, comprising a base (1), characterized in that The base (1) is provided with an arc-shaped track (2) at the top, and a neck fixation member (3) is slidably arranged on the arc-shaped track (2). A sliding frame (4) is linearly slidably arranged above the neck fixation member (3). A scanning detection device (5) is provided at the bottom of the sliding frame (4). The scanning detection device (5) includes a head contour detection probe and a detection coil. Fixing frames (6) that surround the head are provided on both sides and one end of the neck fixation member (3). A three-axis robotic arm (7) is provided on the fixing frame (6). A flexible contact (8) is provided at the end of the three-axis robotic arm (7) near the head.

2. The NMR head movement detection apparatus according to claim 1, wherein The neck fixation member (3) is provided with a driving member (9) at its bottom. The driving end of the driving member (9) is connected to the bottom of the neck fixation member (3) to drive the neck fixation member (3) to slide along the arc track (2). The neck fixation member (3) is provided with an angle sensor.

3. The NMR head movement detection apparatus according to claim 2, wherein The driving component (9) includes a driving motor (91), a driving gear (92), and an arc rack (93). The bottom of the neck fixing component (3) is provided with an arc rack (93) and a slider. The output shaft of the driving motor (91) is provided with a driving gear (92). The driving gear (92) is meshed with the arc rack (93). The slider is slidably connected to the arc track (2).

4. The NMR head immobilization and shimming apparatus of any of claims 1-3, wherein, At least three sets of non-collinear three-axis robotic arms (7) are provided on the fixed frame (6).

5. The NMR head movement detection apparatus of claim 4, wherein The flexible contact (8) includes a transfer frame (81), a slide column (82), a spring (83), and a contact (84). The transfer frame (81) is installed on the moving end of the three-axis robotic arm (7). The slide column (82) is slidably arranged on the transfer frame (81). The contact (84) is arranged at the end of the slide column (82) near the head. The spring (83) is arranged between the outside of the slide column (82) and the transfer frame (81).

6. The NMR head movement detection apparatus of claim 5, wherein The contact (84) is any one of memory foam contact, gel pad contact, or memory latex pad contact.

7. The magnetic resonance imaging head shaking stabilization and tremor reduction detection device according to any one of claims 1-3, characterized in that, The neck fixation member (3) includes a neck pillow (31) and a side limiting plate (32). The bottom of the neck pillow (31) is slidably connected to the arc-shaped track (2), and the side limiting plates (32) are hinged to the sides of the neck pillow (31) at positions corresponding to the sides of the neck.

8. The NMR head movement detection apparatus of claim 7, wherein The neck pillow (31) is provided with lugs on both sides, and the bottom of the side limiting plate (32) is rotatably connected to the connecting hole on the lug through a hinge shaft. A torsion spring (33) is provided on the outside of the hinge shaft.

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