Dental coil for magnetic resonance imaging and magnetic resonance system

Abstract

The utility model provides a dental coil for magnetic resonance imaging and a magnetic resonance system, the dental coil comprises a receiving coil, the receiving coil comprises a main coil, the main coil at least covers the area where teeth are distributed; and the sub-coil covers an area to be detected in the tooth area. According to the utility model, the receiving coil in the dental coil comprises the main coil which at least covers the tooth area of the patient and the at least one sub-coil which is used for covering the area to be detected in the tooth area, and the main coil and the sub-coil are matched for use, so that the area to be detected can be positioned; therefore, the position of the current detection area in the tooth area can be observed conveniently, the signal-to-noise ratio of the area to be detected in the tooth area can be increased, the quality of magnetic resonance imaging is improved, and the safety and sanitation of a patient can be facilitated by selectively designing the sub-coil as a disposable coil.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic resonance equipment, and in particular relates to a dental coil and a magnetic resonance system used for magnetic resonance imaging. Background Art

[0002] Magnetic resonance imaging is a technology that uses the magnetic resonance phenomenon for imaging. Magnetic resonance imaging systems usually include a cavity-shaped superconducting magnet, a gradient coil surrounding the superconducting magnet, a cavity-shaped body coil located in the gradient coil, an examination table bed for placing the patient, and a local coil used to cover a certain part of the patient, such as a knee coil, shoulder coil, spine coil, wrist coil, body coil, and head and neck coil, etc. In addition, the magnetic resonance system has better imaging effects on soft tissues and does not have the hazards of ionizing radiation. Therefore, in dental medical imaging, magnetic resonance scanning has a large market space and development potential.

[0003] Pathologies of the teeth and periodontium, such as caries or periodontitis, are currently usually diagnosed using X-ray-based imaging methods, but magnetic resonance imaging technology can achieve better soft tissue contrast than X-ray methods and supports three-dimensional imaging of the examination object in a standard manner.

[0004] However, there are relatively few dental applications of magnetic resonance systems on the market. In the limited applications, most of them use head and neck coils for scanning. However, since the distribution of antenna units of these coils is not specially designed for the oral cavity, they are far away from the teeth and do not fit very tightly. Therefore, the optimal signal-to-noise ratio requirements cannot be achieved, resulting in problems such as poor imaging effects. Utility Model Content

[0005] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a dental coil and a magnetic resonance system for magnetic resonance imaging, so as to improve the existing coils for dental magnetic resonance imaging, which have the problems of being far away from the teeth and not fitting tightly, resulting in failure to achieve the optimal signal-to-noise ratio requirement, leading to poor imaging effect, and the like.

[0006] In order to achieve the above-mentioned object and other related objects, the utility model provides a dental coil for magnetic resonance imaging, wherein the dental coil comprises a receiving coil, and the receiving coil comprises:

[0007] A main coil, the main coil at least covers an area where teeth are distributed;

[0008] At least one sub-coil, which covers a region to be inspected in the tooth region.

[0009] In one embodiment of the present invention, the main coil is arranged close to the mouth of the detected object.

[0010] The sub-coil is arranged in the mouth of the detected object and is close to the tooth part to be detected.

[0011] In one embodiment of the present invention, the main coil includes a plurality of annular coil units, the plurality of annular coil units are arranged in an array, and two adjacent annular coil units are fixedly connected.

[0012] In one embodiment of the present invention, the dental coil further comprises a transmitting coil, and the distribution area of ​​the transmitting coil at least covers the main coil.

[0013] In one embodiment of the present invention, the transmitting coil is a birdcage coil unit.

[0014] In one embodiment of the present utility model, the sub-coil includes an outer packaging base and an antenna unit, the antenna unit is installed in the outer packaging base, and the antenna unit is a single-loop structure.

[0015] In one embodiment of the utility model, when the sub-coil is parallel to the main magnetic field direction, the single-loop antenna unit is a circular ring antenna structure;

[0016] When the sub-coil is perpendicular to the main magnetic field, the single-loop antenna unit is similar to an 8-shaped antenna structure.

[0017] In one embodiment of the present invention, the sub-coil is a disposable coil.

[0018] In one embodiment of the present invention, the outer packaging substrate is made of biocompatible material, including disposable latex or disposable rubber material.

[0019] In one embodiment of the present invention, the sub-coil covers one or more single tooth regions.

[0020] The utility model also provides a magnetic resonance system, comprising: a magnetic resonance device and a dental coil for magnetic resonance imaging as described in any one of the above embodiments.

[0021] The utility model proposes a dental coil and a magnetic resonance system for magnetic resonance imaging, wherein a receiving coil in the dental coil is configured to include a main coil at least covering a patient's tooth area, and at least one sub-coil for covering a to-be-detected area in the tooth area. The main coil and the sub-coil are used in combination to locate the to-be-detected area, thereby facilitating observation of the position of the current detection area in the tooth area, and at the same time, the signal-to-noise ratio of the to-be-detected area in the tooth area can be enhanced, thereby improving the quality of magnetic resonance imaging.

[0022] The utility model proposes a dental coil and magnetic resonance system for magnetic resonance imaging, which is beneficial to the safety and hygiene of patients by designing the sub-coil as a disposable coil. Furthermore, the disposable coil can be designed to include only a simple loop inductor and a resonance cap, and other structures such as control and LNA circuits are independently designed relative to the sub-coil, which is beneficial to reducing costs and making it more affordable; and the size of the sub-coil can be selected according to the size of the area to be detected, and can cover one or more single teeth, which is beneficial for users to select and use according to needs and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of a main coil of a receiving coil in one embodiment of the utility model.

[0025] Figure 2 The figure is a schematic diagram of a sub-coil of a receiving coil in one embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of a sub-coil of a receiving coil in another embodiment of the present invention.

[0027] Figure 4 Schematic diagram of a birdcage coil in one embodiment of the utility model. DETAILED DESCRIPTION

[0028] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0029] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0030] See also Figure 1As shown, the utility model proposes a dental coil and magnetic resonance system for magnetic resonance imaging to solve the problems that the existing coils for dental magnetic resonance imaging cannot meet the optimal signal-to-noise ratio requirements, resulting in poor imaging effects. Specifically, the dental coil for magnetic resonance imaging includes a transmitting coil and a receiving coil, wherein the receiving coil includes a main coil and at least one sub-coil, the main coil at least covers the area where the patient's teeth are distributed, the sub-coil covers the area to be detected in the patient's tooth area, the distribution area of ​​the transmitting coil at least covers the main coil, and the transmitting coil can be driven to excite a very high local radio frequency field in the teeth and the surrounding tissues, thereby avoiding the absorption of radio frequency energy by other parts of the human body, effectively reducing the radio frequency energy absorption rate of other parts, and finally, the tooth distribution area imaging with a high signal-to-noise ratio can be obtained through the receiving coil.

[0031] See also Figure 1 and Figure 4 As shown, in this embodiment, the transmitting coil is a birdcage coil unit 30, and its size can be selected according to the size of the patient's head, for example, its diameter is set between 25 cm and 35 cm, such as 30 cm. Of course, conventional whole-body magnetic resonance magnets, gradient coils and antennas can also be used. In this embodiment, the number of legs of the birdcage coil unit can be set to 4, 8, 12 or 16.

[0032] See also Figure 1 As shown, in this embodiment, the receiving coil is designed to include a combination of a main coil 10 and at least one sub-coil 20. For example, the main coil 10 is arranged close to the mouth of the object to be detected, and the sub-coil 20 is arranged in the mouth of the object to be detected and close to the tooth part to be detected. The main coil 10 and the sub-coil 20 are used in combination to improve their signal-to-noise ratio. In this embodiment, the main coil 10 is preferably an array coil. For example, the main coil 10 includes a plurality of annular coil units, and the plurality of annular coils are arranged in an array, and two adjacent annular coil units are fixedly connected to improve the basic signal-to-noise ratio. Of course, the transmitting coil can also be used as a receiving coil to improve a basic background signal-to-noise ratio. The sub-coil 20 is used to cover the sub-coil 20 of the area to be detected in the tooth area. By using the main coil 10 and the sub-coil 20 together, the area to be detected can be located, so as to facilitate the observation of the position of the current detection area in the tooth area, and at the same time, the signal-to-noise ratio of the area to be detected in the tooth area can be enhanced to improve the quality of magnetic resonance imaging.

[0033] See also Figure 1As shown, in this embodiment, the sub-coil 20 includes an outer packaging substrate 21 and an antenna unit 22. The antenna unit 22 is installed in the outer packaging substrate 21. The antenna unit 22 is a single-loop structure, which is simple in structure and easy to produce. It should be noted that when the sub-coil 20 is parallel to the main magnetic field direction, the single-loop antenna unit 22 is a circular ring antenna structure; when the sub-coil 20 is perpendicular to the main magnetic field direction, the single-loop antenna unit 22 is an 8-shaped antenna structure. When using the sub-coil 20, the user can select a suitable sub-coil 20 according to the relationship between the coil placement direction and the magnetic field direction.

[0034] See also Figure 1 As shown, in this embodiment, the sub-coil 20 can be designed as a disposable coil, so that it can be replaced for each patient, which is beneficial to the safety and hygiene of the patient. In this embodiment, the outer packaging substrate 21 is made of a biocompatible material, which can be made of a soft material used as a medical device. For example, the outer packaging substrate 21 is made of a disposable latex material or a disposable rubber material. When in use, the disposable sub-coil 20 can be directly placed in the patient's mouth and cover the area to be tested in the teeth. The sub-coil 20 can be fixed by the patient's direct bite. The soft material used for medical use is beneficial to the patient's health and improves the patient's comfort when placing or fixing the sub-coil 20.

[0035] See also Figure 1 As shown, in this embodiment, the antenna unit 22 designed as a single-loop structure in the sub-coil 20 only includes a simple loop inductor and a resonant cap, and other structures such as control and LNA circuits are independently designed relative to the sub-coil 20, that is, other structures such as control and LNA circuits are designed on the outside of the outer packaging substrate 21, so that it can reduce the consumables generated by replacing the disposable sub-coil 20, which is conducive to reducing costs and making it more affordable.

[0036] See also Figure 1As shown, in some other embodiments, the outer packaging substrate 21 and the antenna unit 22 are designed to be detachably connected, and the antenna unit 22 can be removed from the outer packaging substrate 21, and a new outer packaging substrate 21 can be replaced to wrap the antenna unit 22 for use. Of course, when using the sub-coil 20, the user can also select a suitable antenna unit 22 structure according to the relationship between the coil placement direction and the magnetic field direction, such as a ring antenna structure or an 8-shaped antenna structure, which is assembled to the disposable outer packaging substrate 21 and then covered on the area to be detected in the patient's tooth area, which is convenient for the user to replace the antenna unit 22 or the outer packaging substrate 21 as needed. At the same time, only the outer packaging substrate 21 is a disposable item, and its antenna unit 22 is reusable, which can further reduce consumables and costs while ensuring safety and hygiene.

[0037] See also Figure 1 As shown, in this embodiment, the size of the sub-coil 20 can be selected according to the size of the area to be detected, and can cover one or more single teeth. For example, the diameter of the sub-coil 20 can be designed to be between 1 cm and 2 cm to cover a single tooth area, and can also be designed to be 2 cm to 3 cm, or even larger, so as to cover two or more teeth, which is conducive to users to choose and use according to their needs and improve efficiency. It is understandable that when the area to be detected is too large, the use of a sub-coil 20 that is too large will cause discomfort to the patient and affect the patient's experience of use. Therefore, multiple small-sized sub-coils 20 can be used instead of larger-sized sub-coils 20 for coverage, which is conducive to users placing the sub-coil 20 in the patient's mouth and covering the corresponding position, and is conducive to improving the patient's comfort.

[0038] The utility model also proposes a magnetic resonance system, including: a magnetic resonance device and a dental coil, wherein the magnetic resonance device is configured to detect magnetic resonance signals of a patient's dental area with the aid of the dental coil, and the dental coil has the same or similar structure to the dental coil for magnetic resonance imaging described in the above embodiment, and will not be described again here to avoid repetition.

[0039] The utility model proposes a dental coil and a magnetic resonance system for magnetic resonance imaging, wherein a receiving coil in the dental coil is configured to include a main coil at least covering a patient's tooth area, and at least one sub-coil for covering a to-be-detected area in the tooth area. The main coil and the sub-coil are used in combination to locate the to-be-detected area, thereby facilitating observation of the position of the current detection area in the tooth area, and at the same time, the signal-to-noise ratio of the to-be-detected area in the tooth area can be enhanced, thereby improving the quality of magnetic resonance imaging.

[0040] The utility model proposes a dental coil and magnetic resonance system for magnetic resonance imaging, which is beneficial to the safety and hygiene of patients by designing the sub-coil as a disposable coil. Furthermore, the disposable coil can be designed to include only a simple loop inductor and a resonance cap, and other structures such as control and LNA circuits are independently designed relative to the sub-coil, which is beneficial to reducing costs and making it more affordable; and the size of the sub-coil can be selected according to the size of the area to be detected, and can cover one or more single teeth, which is beneficial for users to select and use according to needs and improve efficiency.

[0041] It should be understood that references to "one embodiment," "an embodiment," or "a specific embodiment" throughout the specification mean that the particular features, structures, or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0042] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0043] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope involved in the present application is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the concept of the utility model, such as a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

[0044] Except for the technical features described in the specification, the other technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present utility model, the other technical features will not be described in detail here.

Claims

1. A dental coil for magnetic resonance imaging, characterized in that The dental coil comprises a receiving coil, and the receiving coil comprises: A main coil, the main coil at least covers an area where teeth are distributed; At least one sub-coil, which covers a region to be inspected in the tooth region.

2. The dental coil for magnetic resonance imaging according to claim 1, characterized in that The main coil is arranged close to the mouth of the object to be detected. The sub-coil is arranged in the mouth of the detected object and is close to the tooth part to be detected.

3. The dental coil for magnetic resonance imaging according to claim 1, characterized in that: The main coil includes a plurality of annular coil units, the plurality of annular coil units are arranged in an array, and two adjacent annular coil units are fixedly connected.

4. The dental coil for magnetic resonance imaging according to claim 1, characterized in that: The dental coil further comprises a transmitting coil, and a distribution area of ​​the transmitting coil at least covers the main coil.

5. The dental coil for magnetic resonance imaging according to claim 4, characterized in that: The transmitting coil is a birdcage coil unit.

6. The dental coil for magnetic resonance imaging according to claim 1, characterized in that: The sub-coil comprises an outer packaging base and an antenna unit. The antenna unit is installed in the outer packaging base. The antenna unit is a single-loop antenna unit with a single-loop structure.

7. The dental coil for magnetic resonance imaging according to claim 6, characterized in that: When the sub-coil is parallel to the main magnetic field direction, the single-loop antenna unit is a circular ring antenna structure; When the sub-coil is perpendicular to the main magnetic field, the single-loop antenna unit is an 8-shaped antenna structure.

8. The dental coil for magnetic resonance imaging according to claim 6, characterized in that: The sub-coil is a disposable coil.

9. The dental coil for magnetic resonance imaging according to claim 1, characterized in that: The sub-coils cover one or more individual tooth regions.

10. A magnetic resonance system, characterized in that: include: A magnetic resonance apparatus and a dental coil for magnetic resonance imaging as claimed in any one of claims 1 to 9.

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