Temporomandibular joint radio frequency coil device
By designing a radiofrequency coil device suitable for the temporomandibular joint, the problems of low signal-to-noise ratio and motion artifacts in the existing technology have been solved, achieving high-definition temporomandibular joint imaging and improving patient comfort.
Patent Information
- Application Number
- CN202423069363.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-12
AI Technical Summary
In existing technologies, head (neck) coils and flexible coils have low signal-to-noise ratios when imaging the temporomandibular joint, cannot effectively suppress motion artifacts, have poor patient comfort, and cannot provide targeted high-resolution magnetic resonance imaging.
A temporomandibular joint radio frequency coil device was designed, comprising a base, a support mechanism, an adjustment mechanism, and a radio frequency coil mechanism. By cooperating with the radio frequency coil mechanism through a U-shaped groove, and adjusting the support mechanism and the adjustment mechanism, the position of the radio frequency coil can be adjusted and fixed, ensuring that the coil fits the temporomandibular joint, suppressing motion artifacts and improving the signal-to-noise ratio.
It improved the signal-to-noise ratio, reduced motion artifacts, enhanced patient comfort, and improved the image quality of the temporomandibular joint area.
Smart Images
Figure CN223611690U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of magnetic resonance imaging, and particularly relates to a temporomandibular joint radio frequency coil device. BACKGROUND
[0002] Magnetic resonance imaging (English full name: Magnetic Resonance Imaging, for short MRI) has been used for imaging diagnosis of all systems of the whole body in modern medicine. MRI applies a certain frequency radio frequency pulse to the human body in a static magnetic field, so that the hydrogen protons in the human body are excited to produce magnetic resonance phenomenon. After stopping the pulse, the protons produce magnetic resonance signals in the relaxation process. Through the receiving, spatial encoding and image reconstruction of the magnetic resonance signals, a complete magnetic resonance image is established, wherein the emission of the radio frequency pulse and the reception of the magnetic resonance signals are both completed by the radio frequency coil device, so the radio frequency coil device is a core component of the magnetic resonance imaging system. In the magnetic resonance imaging system, the image definition is an important index for judging the advantages and disadvantages of the radio frequency coil device, wherein the signal-to-noise ratio (SNR) produced by the radio frequency coil receiving signal and the suppression degree of image artifacts in the imaging process are key factors for obtaining high-definition images.
[0003] Temporomandibular joint (Temporomandibular joint, for short TMJ) disorder syndrome is the most common disease in the oral and maxillofacial region. Through the high-definition MRI image, the conditions of the disc and the muscle and other soft tissues of the joint can be judged, and important information for diagnosing temporomandibular joint disorder disease is provided. At present, the hospital clinical examination of temporomandibular joint symptoms basically selects a head (neck) coil or a flexible coil. However, in order to adapt to different head sizes, the head (neck) coil takes into account the imaging of the whole head, and the inner cavity size is large, and the signal-to-noise ratio is low. In the use process of the flexible coil, the head is not easy to fix, and motion artifacts are easily produced. The signal-to-noise ratio is relatively improved limitedly compared with the head coil, the patient's use comfort is low, and the temporomandibular joint cannot be targeted to provide good magnetic resonance imaging. In addition, the imaging units of the two types of coils cannot be moved at will, and the patient needs to adjust the position to cooperate with the positioning scanning, so that the patient experience comfort is poor. Therefore, it is a problem to be solved to design a coil device with high signal-to-noise ratio, suppression of image motion artifacts and improvement of patient comfort.
[0004] The information disclosed in this BACKGROUND section is only intended to increase an understanding of the general background of the application and is not intended to be a recognition or a suggestion that this information forms part of the prior art that is already known to those of ordinary skill in the art. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a temporomandibular joint radio frequency coil device, so as to overcome the defects in the prior art.
[0006] In order to achieve the above object, the utility model provides a kind of temporal mandibular joint radio frequency coil device, including base, support mechanism, adjusting mechanism, radio frequency coil mechanism, radio frequency signal processing mechanism;The surface middle part of the base is provided with the U-shaped groove of concave, U-shaped groove both sides are symmetrically provided with support mechanism, adjusting mechanism is movably arranged on the support mechanism, radio frequency coil mechanism is freely rotatably arranged on the adjusting mechanism, the position of the radio frequency coil mechanism in the length direction and width direction of U-shaped groove is adjusted by adjusting mechanism;Radio frequency coil unit is arranged in the radio frequency coil mechanism, and the size of radio frequency coil unit is adapted to temporal mandibular joint;Radio frequency signal processing mechanism is arranged in the base, and radio frequency coil unit is connected with radio frequency signal processing unit by signal line;Patient's head is fixed by U-shaped groove and radio frequency coil mechanism cooperation, and the position of radio frequency coil mechanism is adjusted by support mechanism and adjusting mechanism, so that radio frequency coil mechanism is attached to patient scanning part.
[0007] Preferably, in the technical scheme, the support mechanism includes a support frame, a cross frame, a clamping groove, and a gear, the U-shaped groove is symmetrically provided with a positioning groove on both sides, the support frame is fixed in the positioning groove, the support frame includes two oppositely arranged support columns, the clamping groove is provided on the support column, a plurality of gears are provided on the bottom surface of the clamping groove, the cross frame is clamped at both ends in the corresponding clamping groove, and the end face structure of the cross frame is matched with the gear; the height of the cross frame in the clamping groove is adjusted by stress deformation of the cross frame.
[0008] Preferably, in the technical scheme, the cross frame includes an upper beam, a lower beam, a button, a cross bar, and a clamping head, the upper beam is connected with the lower beam at both ends, the cross bar is arranged inside the lower beam, the lower beam is provided with an opening at both ends, the clamping head is arranged at both ends of the cross bar, the clamping head is located at the opening, the structure of the clamping head is matched with the gear, the button is arranged in the middle of the cross bar, the lower beam is provided with an opening at the corresponding position of the button, the button extends to the outside of the bottom surface of the lower beam, and the cross bar is made of elastic material; the height of the cross frame in the clamping groove is adjusted by pressing the button to compress the cross bar to separate the clamping head from the gear.
[0009] Preferably, in the technical scheme, the adjusting mechanism includes a sliding block, a sliding rod, a clasp, and a ball joint, the sliding block is movably arranged on the cross frame, the sliding rod is arranged in the sliding block, the clasp is arranged on the sliding block and in contact with the sliding rod, the clasp limits the movement of the sliding rod in the width direction of the U-shaped groove, and the ball joint is arranged at the front end of the sliding rod.
[0010] Preferably, in the technical scheme, the cross frame and the sliding rod are provided with anti-skid pads to limit the free movement of the sliding block in the length direction of the U-shaped groove and limit the free movement of the sliding rod in the width direction of the U-shaped groove.
[0011] Preferably, in the technical scheme, the sliding rod is made of polyoxymethylene plastic.
[0012] Preferably, in the technical scheme, the radio frequency coil mechanism comprises a shell and a radio frequency coil unit, the shell is arranged on the ball joint in a 360° rotatable manner, the shell is arc-shaped, and the radio frequency coil unit is arranged in the shell; the radio frequency coil unit comprises four coil channels, four directions of a plane where the radio frequency coil unit is located are regarded as head, foot, up and down, two coil channels in the head-foot direction are respectively a first channel, a second channel and a third channel and a fourth channel, two coil channels in the up-down direction are respectively the first channel, the third channel and the second channel and the fourth channel, the first channel and the second channel overlap in the head-foot direction, the third channel and the fourth channel overlap in the head-foot direction, the first channel and the third channel overlap in the up-down direction, the second channel and the fourth channel overlap in the up-down direction, and the four channels are laid in the shell in a checkboard structure.
[0013] Preferably, in the technical scheme, the radio frequency signal processing mechanism comprises a radio frequency coil signal filtering and amplifying module, the radio frequency coil signal filtering and amplifying module is arranged in the base, and the radio frequency coil signal filtering and amplifying module is connected with the radio frequency coil unit through a signal line.
[0014] Compared with the prior art, the utility model has the advantages of the following beneficial effects:
[0015] By setting the radio frequency coil unit matched with the size of the temporomandibular joint, noise collection is reduced, and the signal-to-noise ratio is improved. The radio frequency coil mechanism can be adjusted in the width, length and height directions of the U-shaped groove, and can improve the 360° rotation of the ball joint, effectively fix the human head, suppress the motion artifacts generated during imaging, and improve the scan image quality of the human temporomandibular joint part. The radio frequency coil mechanism perfectly fits the patient's scan part, and improves the patient's comfort to a certain extent. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a structure schematic view of the temporomandibular joint radio frequency coil device of the utility model;
[0017] Figure 2 It is a front view of the temporomandibular joint radio frequency coil device of the utility model;
[0018] Figure 3 It is a left view of the temporomandibular joint radio frequency coil device of the utility model;
[0019] Figure 4 It is a plan view of the temporomandibular joint radio frequency coil device of the utility model;
[0020] Figure 5 It is a structure schematic view of the supporting mechanism of the utility model;
[0021] Figure 6 It is a structure schematic view of the adjusting mechanism of the utility model;
[0022] Figure 7 It is a structure schematic view of the radio frequency coil unit of the utility model. DETAILED DESCRIPTION
[0023] The specific embodiments of the utility model will be described in detail below, but it should be understood that the protection scope of the utility model is not limited by the specific embodiments.
[0024] Unless otherwise explicitly indicated, in the entire specification and claims, the term "comprises" or its variants such as "contains" or "includes" and the like will be understood to include the stated element or component, but not exclude the presence of other elements or components.
[0025] As Figures 1-4 The utility model relates to a kind of radio frequency coil devices of temporomandibular joint, including base 1, support mechanism 2, adjusting mechanism 3, radio frequency coil mechanism 4, radio frequency signal processing mechanism;The surface middle part of the base 1 is provided with the U-shaped groove 10 of concave, U-shaped groove 10 both sides are provided with support mechanism 2 symmetrically, adjusting mechanism 3 is arranged on the support mechanism 2 liftable, radio frequency coil mechanism 4 is freely rotatably arranged on the adjusting mechanism 3, the position of the radio frequency coil mechanism 4 in the length direction and width direction of U-shaped groove 10 is adjusted by the adjusting mechanism 3;
[0026] Support mechanism 2 includes support frame 20, cross frame 21, clamping groove 22, gear 23, U-shaped groove 10 both sides are provided with positioning slot symmetrically, support frame 20 is fixed in positioning slot, support frame 20 includes two oppositely arranged support columns, clamping groove 22 is provided on support column, a plurality of gears 23 are provided on the bottom surface of clamping groove 22, cross frame 21 both ends are clamped in corresponding clamping groove 22, and the end face structure of cross frame 21 both ends cooperates with gear 23.
[0027] As Figure 5 Indicated, cross frame 21 includes upper beam 210, lower beam 211, button 212, horizontal bar 213, clamping head 214, upper beam 210 both ends are connected with lower beam 211, horizontal bar 213 is provided in lower beam 211, and opening is formed in the both ends of lower beam 211, clamping head 214 is provided at the both ends of horizontal bar 213, and clamping head 214 is located at opening, and the structure of clamping head 214 cooperates with gear 23, button 212 is provided in the middle part of horizontal bar 213, the opening of lower beam 211 at the corresponding position of button 212, button 212 extends to the outside of the bottom surface of lower beam 211, and horizontal bar 213 is made of elastic material;By pressing button 213, horizontal bar 213 is deformed, clamping head 214 is separated from gear 23, and the height of cross frame 21 in clamping groove is adjusted.
[0028] As Figure 6As shown, the adjustment mechanism 3 includes a slider 30, a sliding rod 31, a latch 32, and a ball joint 33. The slider 30 is movably mounted on the crossbeam 21. The sliding rod 31 passes through the slider 30. A latch 32 is provided on the slider 30, and the latch 32 contacts the sliding rod 31, restricting the movement of the sliding rod 31 in the width direction of the U-shaped groove 10. A ball joint 33 is provided at the front end of the sliding rod 31. The sliding rod 31 is made of polyoxymethylene plastic. Anti-slip pads 34 are provided on the crossbeam 21 and the sliding rod 31 to restrict the free movement of the slider 30 in the length direction of the U-shaped groove 10 and the free movement of the sliding rod 31 in the width direction of the U-shaped groove 10.
[0029] The radio frequency coil mechanism 4 includes a housing 40 and a radio frequency coil unit. The housing 40 is rotatably mounted on the ball joint 33, and the housing 40 has an arc-shaped structure. The radio frequency coil unit is disposed inside the housing 40. Figure 7 As shown, the radio frequency coil unit includes four coil channels. Taking the four directions of the plane where the radio frequency coil unit is located as head, foot, top, and bottom, the two columns of coil channels along the head-foot direction are the first channel 41, the second channel 42, the third channel 43, and the fourth channel 44, respectively. The two rows of coil channels along the top-bottom direction are the first channel 41, the third channel 43, the second channel 42, and the fourth channel 44, respectively. The first channel 41 and the second channel 42 overlap in the head-foot direction, the third channel 43 and the fourth channel 44 overlap in the head-foot direction, the first channel 41 and the third channel 43 overlap in the top-bottom direction, and the second channel 42 and the fourth channel 44 overlap in the top-bottom direction. The four channels are laid out in a grid-like structure inside the outer shell 40.
[0030] The radio frequency signal processing mechanism includes a radio frequency coil signal filtering and amplification module, which is housed within a base 1. A waterproof connector is provided on the base 1, and a corrugated pipe connects the waterproof connector to the outer casing 40. The radio frequency coil unit is connected to a signal line, which is then connected to the radio frequency coil signal filtering and amplification module via the corrugated pipe and the waterproof connector. The base 1 has an output port for connection to a magnetic resonance system. The output of the radio frequency coil signal filtering and amplification module is connected to the signal line, which is then connected to the magnetic resonance system via the output port.
[0031] During use, the patient's head rests in the U-shaped groove 10. The position of the radio frequency coil unit in the width, length, and height directions of the U-shaped groove is adjusted according to the shape of the patient's head. The radio frequency coil unit rotates 360° to perfectly fit the patient's scanning area. This improves patient comfort while effectively fixing the patient's head through the cooperation of the U-shaped groove 10 and the radio frequency coil mechanism, suppressing motion artifacts during imaging and improving the image quality of the temporomandibular joint. By setting the radio frequency coil unit to match the size of the temporomandibular joint, noise acquisition is reduced, and the signal-to-noise ratio is improved.
[0032] The foregoing description of specific exemplary embodiments of the present application is intended to be illustrative only and is not intended to limit the application to the precise forms disclosed. Many modifications and variations are possible in light of the above teachings without departing from the spirit or essential characteristics of the present application. The exemplary embodiments were chosen and described in order to explain the principles of the present application and its practical application and to allow others skilled in the art to understand the present application for various exemplary embodiments with various modifications as are suited to the particular use contemplated. It is intended that the scope of the present application be defined by the claims and their equivalents.
Claims
1. A temporomandibular joint radio frequency coil device, characterized in that: The device includes a base, a support mechanism, an adjustment mechanism, a radio frequency coil mechanism, and a radio frequency signal processing mechanism. The base has a recessed U-shaped groove in the center of its surface, with support mechanisms symmetrically arranged on both sides of the U-shaped groove. An adjustment mechanism is vertically mounted on each support mechanism, and a radio frequency coil mechanism is rotatably mounted on the adjustment mechanism. The adjustment mechanism adjusts the position of the radio frequency coil mechanism along the length and width of the U-shaped groove. A radio frequency coil unit is housed within the radio frequency coil mechanism, and the size of the radio frequency coil unit is adapted to the temporomandibular joint. A radio frequency signal processing mechanism is located within the base, and the radio frequency coil unit is connected to the radio frequency signal processing unit via a signal line.
2. The temporomandibular joint radiofrequency coil device according to claim 1, characterized in that: The support mechanism includes a support frame, a crossbar, slots, and stops. Positioning slots are symmetrically arranged on both sides of the U-shaped groove. The support frame is fixed in the positioning slots. The support frame includes two opposing support columns with slots on them. Several stops are provided on the bottom surface of the slots. The two ends of the crossbar are engaged in the corresponding slots. The end face structure of the two ends of the crossbar cooperates with the stops. The height of the crossbar in the slots is adjusted by the deformation of the crossbar under force.
3. The temporomandibular joint radiofrequency coil device according to claim 2, characterized in that: The crossbar includes an upper beam, a lower beam, a button, a crossbar, and a snap-fit connector. The upper beam is connected to the lower beam at both ends. A crossbar is installed inside the lower beam. Openings are opened at both ends of the lower beam. Snap-fit connectors are installed at both ends of the crossbar. The snap-fit connectors are located at the openings and their structure matches the stop position. A button is installed in the middle of the crossbar. An opening in the lower beam corresponds to the button's position. The button extends to the outside of the bottom surface of the lower beam. The crossbar is made of elastic material.
4. The temporomandibular joint radiofrequency coil device according to claim 2, characterized in that: The adjustment mechanism includes a slider, a sliding rod, a latch, and a ball joint. The slider is movably mounted on the crossbar, the sliding rod passes through the slider, and a latch is provided on the slider. The latch contacts the sliding rod and restricts the movement of the sliding rod in the width direction of the U-shaped groove. A ball joint is provided at the front end of the sliding rod.
5. The temporomandibular joint radiofrequency coil device according to claim 4, characterized in that: Anti-slip pads are provided on the crossbar and sliding rod to restrict the free movement of the slider in the length direction of the U-shaped groove and to restrict the free movement of the sliding rod in the width direction of the U-shaped groove.
6. The temporomandibular joint radiofrequency coil device according to claim 4, characterized in that: The sliding rod is made of polyoxymethylene plastic.
7. The temporomandibular joint radiofrequency coil device according to claim 4, characterized in that: The radio frequency coil mechanism includes a housing and a radio frequency coil unit. The housing is rotatable on a ball joint and has an arc-shaped structure. The radio frequency coil unit is located inside the housing. The radio frequency coil unit includes four coil channels. Taking the four directions of the plane where the radio frequency coil unit is located as head, foot, top, and bottom, the two columns of coil channels along the head-foot direction are the first channel, the second channel, the third channel, and the fourth channel, respectively. The two rows of coil channels along the top-bottom direction are the first channel, the third channel, the second channel, and the fourth channel, respectively. The first and second channels overlap in the head-foot direction, the third and fourth channels overlap in the head-foot direction, the first and third channels overlap in the top-bottom direction, and the second and fourth channels overlap in the top-bottom direction. The four channels are laid out in a grid-like structure inside the housing.
8. The temporomandibular joint radiofrequency coil device according to claim 7, characterized in that: The radio frequency signal processing mechanism includes a radio frequency coil signal filtering and amplification module, which is located inside the base and is connected to the radio frequency coil unit via signal lines.