CN215916247U - Magnetic resonance head coil and radiotherapy positioning assembly - Google Patents

Abstract

The present invention relates to a magnetic resonance head coil. A magnetic resonance head coil including at least a lower coil, the lower coil including: the bottom shell comprises a first part and a second part, wherein the first part and the second part form an accommodating cavity, and a bottom antenna is arranged in the accommodating cavity, wherein the first part is flat-plate-shaped, and the inner surface of the first part faces to the first direction; the first side shell is connected with one end of the bottom shell in the second direction, and a first side antenna is arranged in the first side shell; and the second side shell is connected with the other end of the bottom shell in the second direction, a second side antenna is arranged in the second side shell, the first side shell and the bottom shell jointly enclose a first groove sunken to the first direction, and the second direction is perpendicular to the first direction. The magnetic resonance head coil is easy to meet the use requirement of magnetic resonance radiotherapy simulation.

Description

Magnetic resonance head coil and radiotherapy positioning assembly

Technical Field

The utility model relates to the technical field of magnetic resonance radiotherapy simulation, in particular to a magnetic resonance head coil and a radiotherapy positioning assembly.

Background

Radiotherapy (i.e., radiation therapy, RT for short) is an important local treatment for malignant tumors. Along with the requirements of doctors and patients on the quality and effect of radiotherapy become higher and higher, the tolerance of the side effect caused by inaccurate radiotherapy is lower and lower, and therefore, the concept of accurate radiotherapy is gradually popularized. In the traditional radiotherapy, a tumor image is obtained by adopting CT (computed tomography) to outline the range of a target region, so that the target region is accurately positioned.

However, CT has certain limitations that only provide better resolution of tissue structures with different electron densities or X-ray absorption characteristics (e.g., air versus bone or water or soft tissue). However, CT has poor ability to distinguish between different soft tissue structures with similar electron density, including tumors, if there is no significant fat or air interface. In contrast, MR (magnetic resonance) has the advantage of a strong visualization of soft tissue with similar electron density, thereby better providing the contours of the target region. Therefore, in the course of radiotherapy, it is gradually emerging to introduce MR to obtain a tumor image and fuse the MR image with a CT image to assist in delineating the target region, which is also called magnetic resonance radiotherapy simulation (i.e. MR-simulator).

It is well known that the design of the magnetic resonance coil is crucial for the quality of the MR images. The common magnetic resonance imaging needs to use a magnetic resonance coil, and accordingly, the magnetic resonance radiotherapy simulation still needs to use the magnetic resonance coil because the magnetic resonance imaging needs to be carried out. The general magnetic resonance coil can meet the use requirement in the common magnetic resonance imaging. However, because of the difference between the clinical use conditions of the magnetic resonance coil in the magnetic resonance radiotherapy simulation and the clinical use conditions in the general magnetic resonance imaging, if the general magnetic resonance coil is still used in the magnetic resonance radiotherapy simulation, the problems of poor MR image quality, complex workflow and the like are caused.

The following description will take a magnetic resonance head coil as an example. In the magnetic resonance radiotherapy simulation, a patient needs to lie on a flat bed plate, and a magnetic resonance head coil is arranged around the skull of the patient. Because the skull bottom of the patient is a flat bed plate, the lower coil of the magnetic resonance head coil cannot be placed due to the fact that the lower coil of the magnetic resonance head coil is not matched with the lower coil of a common magnetic resonance head coil. Therefore, in some solutions, two flexible coils are supported on two sides of the skull by a support, or a large flexible coil is used around the face, but the image quality is poor due to the low signal-to-noise ratio at the bottom of the skull caused by the absence of the lower coil. In some clinical scenarios, the patient's skull needs to be padded up using accessories such as a headrest, which needs to occupy the internal space of the magnetic resonance head coil, however, the general magnetic resonance head coil cannot be used in such a scenario due to the limitation of the internal space. In other clinical scenarios, the position and posture of the patient need to be fixed in the magnetic resonance radiotherapy simulation, and positioning accessories such as a head-neck-shoulder board and a thermoplastic film need to be used for positioning the patient, so that the positioning accessories need to occupy the internal space of the magnetic resonance head coil, but the general magnetic resonance head coil cannot be used in such a scenario due to the limitation of the internal space. Therefore, the general magnetic resonance head coil is difficult to meet the use requirement of magnetic resonance radiotherapy simulation.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a magnetic resonance head coil that easily satisfies the use requirements of a magnetic resonance radiotherapy simulation, in order to solve the problem that a general magnetic resonance head coil is difficult to satisfy the use requirements of a magnetic resonance radiotherapy simulation.

An embodiment of the present application provides a magnetic resonance head coil including at least a lower coil, the lower coil including:

the bottom shell comprises a first part and a second part, wherein the first part and the second part form an accommodating cavity, a bottom antenna is arranged in the accommodating cavity, the first part is flat, and the inner surface of the first part faces to a first direction;

the first side shell is connected with one end of the bottom shell in the second direction, and a first side antenna is arranged in the first side shell; and

and the second side shell is connected with the other end of the bottom shell in the second direction, and the second side shell, the first side shell and the bottom shell jointly enclose a first groove which is sunken towards the first direction.

When the magnetic resonance head coil is used for magnetic resonance radiotherapy simulation, the first part of the bottom shell is in a flat plate shape, so that the outer surface of the first part can be attached to the lower surface of the skull support plate of the flat plate, and the first part is in a flat plate shape, so that the thickness of the first part is thinner, the spacing distance between the bottom antenna and the skull support plate can be reduced as much as possible, the bottom antenna can be close to the skull bottom of a patient as much as possible, the signal-to-noise ratio of the skull bottom of the patient can be improved, and the image quality during magnetic resonance imaging can be further improved. The first part of the bottom shell is flat, so that the outer surface of the first part can be attached to the lower surface of the skull support plate, the lower coil does not occupy the space above the skull support plate for placing the skull of a patient, the space above the skull support plate can be saved, the saved space above the skull support plate can be used for installing a headrest and positioning accessories required by magnetic resonance radiotherapy simulation, and the magnetic resonance head coil can be suitable for more clinical application scenes. Therefore, the magnetic resonance head coil is easy to meet the use requirement of magnetic resonance radiotherapy simulation.

In one embodiment, the bottom antenna is disposed in close contact with an inner surface of the first portion.

In one embodiment, the first portion further has an outer surface opposite the inner surface;

the bottom shell further comprises a protruding portion, wherein the protruding portion is arranged at one end of the first portion in the third direction and protrudes out of the outer surface of the first portion.

In an embodiment, the first portion has a first end and a second end that face away from each other along a third direction, the protrusion is disposed at the first end, and a second groove that is recessed along the third direction is disposed on a side of the protrusion close to the second end.

In an embodiment, the magnetic resonance head coil further comprises an upper coil, which is capable of being flipped and/or distance-adjusted with respect to the bottom housing.

In an embodiment, one end of the upper coil along the second direction is used for connecting or abutting with one end of the first side shell far away from the bottom shell, and the other end of the upper coil along the second direction is used for connecting or abutting with one end of the second side shell far away from the bottom shell.

In one embodiment, the magnetic resonance head coil further comprises: the upper end of the telescopic assembly is connected with the upper coil, and the lower end of the telescopic assembly is connected with the lower coil; when the telescopic assembly makes extension and contraction movement, the top of the upper coil can be driven to change the distance between the top of the upper coil and the bottom shell of the lower coil.

In one embodiment, the first side housing is removably coupled to the upper coil and the second side housing is removably coupled to the upper coil.

In an embodiment, the first side housing is a flexible housing, the second side housing is a flexible housing, and two ends of the upper coil can abut against the first side housing and the second side housing respectively.

In one embodiment, the housing of the upper coil is a flexible housing; the first side shell is a hard shell, and the second side shell is a hard shell.

In an embodiment, a first through hole penetrating along the second direction is formed in one end, close to the bottom shell, of the first side shell, and a second through hole penetrating along the second direction is formed in one end, close to the bottom shell, of the second side shell.

In one embodiment, the retraction assembly comprises:

a main body member;

the rotating piece is rotatably connected with the main body piece; and

the telescopic piece is in threaded transmission with the rotating piece, the main body piece is connected with one of the telescopic pieces and the upper coil, and the main body piece is connected with the other of the telescopic pieces and the lower coil.

In an embodiment, the upper coil has an open state in which the upper coil blocks the opening of the first recess and a closed state in which the upper coil at least partially removes the opening of the first recess so as to at least partially expose the opening of the first recess.

In one embodiment, the upper coil or the lower coil is rotatably connected with the telescopic assembly and can rotate relative to the telescopic assembly around an axis of a third direction, wherein the third direction is perpendicular to the first direction and the second direction respectively; and the first side shell is detachably connected with the upper coil, and the second side shell is detachably connected with the upper coil.

An embodiment of the present application further provides a radiotherapy locating component, including:

a flat bed plate comprising a head and neck support region;

the head coil at least comprises a lower coil, the lower coil comprises a bottom shell and at least one side shell, a bottom antenna is arranged in the bottom shell or on the surface of the bottom shell, the side shell is internally provided with the side antenna, and the bottom shell and the side shell jointly enclose a first groove which is sunken to the first direction;

the head and neck supporting area of the flat bed plate is arranged in the first groove, and the head and neck supporting area of the flat bed plate is in planar contact with the bottom shell, so that the head coil is matched with the flat bed plate.

In one embodiment, the radiotherapy positioning assembly further comprises an upper coil supported by a telescoping assembly such that the upper coil can be flipped and/or distance adjusted relative to the bottom housing.

In an embodiment, the side housing includes a first side housing and a second side housing respectively located at two sides of the bottom housing, and the first side housing or the second side housing is opened with a hollow opening.

Drawings

FIG. 1 is a schematic diagram of an exemplary MR head coil configuration;

FIG. 2 is a schematic view of the lower coil of the magnetic resonance head coil of FIG. 1;

FIG. 3 is a schematic view of another perspective of the lower coil of FIG. 2;

FIG. 4 is a schematic view of an assembly structure of the lower coil and the flat bed plate in FIG. 2;

FIG. 5 is a schematic view of a patient lying on a flat bed and having his skull surrounded by the magnetic resonance head coil of FIG. 1;

FIG. 6 is a partial schematic view of the structure of FIG. 5 from another perspective;

FIG. 7 is a partial schematic view of the magnetic resonance head coil and flat bed plate assembly of FIG. 5;

FIG. 8 is a schematic structural view of the retraction assembly of FIG. 1;

FIG. 9 is a schematic view of the upper coil of FIG. 1 in an open position relative to the lower coil;

FIG. 10 is a schematic view of the overall construction of the retraction assembly of FIG. 8;

FIG. 11 is a schematic view of the connection of the bottom housing to the telescoping assembly of FIG. 1;

FIG. 12 is a schematic view of the connection of the lower coil, the upper coil and the telescoping assembly according to another embodiment;

FIG. 13 is a schematic view of the connection of the lower coil, the upper coil and the telescoping assembly according to yet another embodiment.

The reference numbers illustrate:

a magnetic resonance head coil 100; a flat bed plate 10; a head and neck support region 11; a patient 20;

a lower coil 110;

a bottom case 111; a first portion 1111; a second portion 1112; the convex portion 1113; a second groove 102; a bottom antenna 114; a circuit board 115;

a first side housing 112; a first side antenna 116;

a second side case 113;

a first groove 101;

an upper coil 120; a third groove 103;

a telescoping assembly 130; a main body member 131; a snap 1311; a rotating member 132; a first hole 104; a second hole 105; a step surface 132 a; a snap ring 1321; a telescopic member 133; a guide 134;

a rotation limiting member 141; the rotating shaft seat 142.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, an embodiment of the present application provides a magnetic resonance head coil 100. The magnetic resonance head coil 100 includes at least a lower coil 110. Referring again to fig. 2 and 3, the lower coil 110 includes: a bottom housing 111, a first side housing 112, and a second side housing 113.

The bottom housing 111 includes a first portion 1111 and a second portion 1112. The first portion 1111 and the second portion 1112 constitute a receiving chamber (not shown). A bottom antenna 114 is disposed within the receiving cavity. Specifically, referring to fig. 2, the inner surface of the first portion 1111 faces downward (i.e., faces the first direction yy'), and thus, the first portion 1111 is located above the second portion 1112. The first portion 1111 is flat. Of course, the bottom antenna 114 can also be disposed on the surface of the second portion 1112 away from the first portion 1111.

The second direction xx 'is perpendicular or nearly perpendicular to the first direction yy'. The first side case 112 is connected to one end of the bottom case 111 in the second direction xx ', and the second side case 113 is connected to the other end of the bottom case 111 in the second direction xx ', so that the second side case 113, the first side case 112 and the bottom case 111 enclose the first groove 101 recessed in the first direction yy '. A first side antenna 116 is disposed in the first side housing 112. A second side antenna (not shown) is provided in the second side case 113. The first side housing 112 and the second side housing 113 may further have a hollow opening to allow laser to pass through the hollow opening to reach a target area of a detection object during a scanning and positioning process, thereby realizing position positioning of the target area.

In the magnetic resonance coil, the functions and operation principles of the antenna are prior art, and therefore, in this embodiment, detailed descriptions of the functions and operation principles of the bottom antenna 114, the first side antenna 116, and the second side antenna are omitted. As shown in fig. 3, it is understood that a circuit board (electronic component) 115 is also required to be disposed in the bottom case 111 according to the operation principle of the magnetic resonance coil.

The flat bed plate/spacer plate may include a head and neck support region, a shoulder support region, a back support region (spine support region). Referring to fig. 4 and 5, in the magnetic resonance radiotherapy simulation, one end of the flat bed plate 10 in the length direction has a head and neck support region 11 protruding from the flat bed plate. The head and neck support region 11 is used to support the skull of the patient 20 when the patient 20 is lying flat on the flat bed plate 10. The magnetic resonance head coil 100 in the embodiment of the present application is used to be installed on the flat bed plate 10 at a position corresponding to the head and neck support region 11 so as to surround the skull of the patient 20.

In particular, it will be appreciated that the first portion 1111 has an outer surface opposite its inner surface, such that its outer surface faces upwardly, away from the first direction yy'. When the magnetic resonance head coil 100 is mounted on the flat bed plate 10, the lower surface of the head and neck support region 11 is attached to the outer surface of the first portion 111 (i.e., the bottom wall of the first groove 101 and the upper surface of the first portion 111), and then the head and neck support region 11 is located in the first groove 101, so that the bottom shell 111 is located below the head and neck support region 11, the first side shell 112 and the second side shell 113 are respectively located on two sides of the second direction xx' of the head and neck support region 11, and the ends of the first side shell 112 and the second side shell 113 away from the bottom shell 111 extend upward to a position higher than the head and neck support region 11.

When the skull of the patient 20 is supported on the head and neck support region 11, the skull is located in the first groove 101, so that the head and neck support region 11 is spaced between the skull of the patient 20 and the bottom shell 111, the bottom shell 111 surrounds the bottom of the skull of the patient 20, and the first side shell 112 and the second side shell 113 surround two sides of the skull of the patient 20 respectively. Because the bottom antenna 114 is arranged in the bottom shell 111, the magnetic resonance signal of the bottom of the skull of the patient 20 can be received, the signal-to-noise ratio of the bottom of the skull of the patient 20 is improved, and the magnetic resonance image quality is improved. Due to the first side antenna 116 arranged in the first side shell 112, the signal to noise ratio of the skull of the patient 20 close to the first side shell 112 can be improved, and the magnetic resonance image quality can be improved. Due to the second side antenna arranged in the second side shell 113, the signal to noise ratio of the skull of the patient 20 close to one side of the second side shell 113 can be improved, and the quality of the magnetic resonance image can be improved.

Because the bottom antenna 114 is located in the accommodating cavity formed by the first portion 1111 and the second portion 1112, and the first portion 1111 is located above the second portion 1112 and attached to the lower surface of the head and neck support region 11, when the skull of the patient 20 is supported by the head and neck support region 11, the first portion 1111 is spaced between the bottom antenna 114 and the head and neck support region 11.

When the magnetic resonance head coil 100 is used in a magnetic resonance radiotherapy simulation, the first portion 1111 of the bottom housing 111 is flat, so that the outer surface of the first portion 1111 can be attached to the lower surface of the head and neck support region 11 of the flat bed plate 10, and the first portion 1111 is flat, so that the thickness of the first portion 1111 is thin, so that the distance between the bottom antenna 114 and the head and neck support region 11 can be reduced as much as possible, and the bottom antenna 114 can be as close to the skull bottom of the patient 20 as possible, thereby improving the signal-to-noise ratio of the skull bottom of the patient 20, further improving the image quality during magnetic resonance imaging, and making the magnetic resonance coil 100 easily meet the use requirements of the magnetic resonance radiotherapy simulation.

Because the first portion 1111 of the bottom shell 111 is flat, the outer surface (upper surface) of the first portion 1111 can be attached to the lower surface of the head and neck support region 11, and therefore the lower coil 110 does not occupy the space above the head and neck support region 11 for placing the skull of the patient 20, so that the space above the head and neck support region 11 can be saved, the saved space above the head and neck support region 11 can be used for installing a headrest and positioning accessories required by magnetic resonance radiotherapy simulation, and further the magnetic resonance head coil 100 can be suitable for more clinical application scenes, and the use requirements of the magnetic resonance radiotherapy simulation can be easily met. For example, in some clinical scenarios of magnetic resonance radiotherapy simulation, where it is desired to elevate the skull of the patient 20, the saved space above the head and neck support region 11 can be used to place accessories such as headrests to elevate the skull of the patient 20. In other clinical scenarios of magnetic resonance radiotherapy simulation, the patient needs to be fixed in position and posture, and the patient 20 needs to be positioned by positioning accessories such as a head and neck shoulder plate, a thermoplastic film, etc., and the saved space above the head and neck support region 11 can be used for installing the positioning accessories.

As can be seen from the above, when the magnetic resonance head coil 100 is used in magnetic resonance radiotherapy simulation, the signal-to-noise ratio of the bottom of the skull of the patient 20 can be improved, the image quality during magnetic resonance imaging can be improved, the space above the head and neck support region 11 can be saved, the saved space above the head and neck support region 11 can be used for installing a headrest and positioning accessories required by the magnetic resonance radiotherapy simulation, and then the magnetic resonance head coil 100 can be suitable for more clinical application scenes, and the use requirement of the magnetic resonance radiotherapy simulation can be easily met.

In the embodiment of the present application, the first portion 1111 is flat, which means: in contrast to a curved plate (or a curved housing), which extends along a curved line or a curved surface in a direction perpendicular to the thickness direction, such as an arc-shaped housing and a spherical housing, the extending direction of the first portion 1111 as a whole (i.e., the direction perpendicular to the thickness direction) in the embodiment of the present application is along a plane rather than a curved surface. Therefore, the inner surface and the outer surface of the first portion 1111 may also be non-absolutely flat, that is, may have a certain roughness, as long as the entire extension direction of the first portion 1111 is along a plane. Of course, the inner surface of the first portion 1111 may also be provided with some positioning structure to facilitate positioning of other components inside the bottom housing 111. The outer surface of the first portion 1111 may also be provided with some mounting structure to facilitate the mounting of the outer surface of the first portion 1111 with the lower surface of the naps region 11.

In some embodiments, where the thickness of the first portion 1111 is very thin, the flat plate shape may also be considered as a flat sheet. The first portion 1111 may be made of a flexible material, and the outer surface thereof may be smoothly attached to the lower surface of the head and neck support region 11 when in use.

In an embodiment, along the first direction yy', the distance between the bottom antenna 114 and the first portion 1111 does not exceed the distance between the bottom antenna 114 and the second portion 1112. That is, in the vertical direction, the distance between the bottom antenna 114 and the first portion 1111 is equal to or smaller than the distance between the bottom antenna 114 and the second portion 1112, so that it is possible to ensure that the bottom antenna 114 is disposed as close to the inner surface of the first portion 1111 as possible.

Preferably, the bottom antenna 114 is attached to the inner surface of the first portion 1111, and the distance between the bottom antenna 114 and the inner surface of the first portion 1111 is zero, so that the bottom antenna 114 can be maximally close to the bottom of the skull of the patient 20.

Of course, the bottom antenna 114 can also be attached to the inner surface (i.e., the upper surface) of the second portion 1112, so that the structure between the bottom antenna 114 and the bottom housing 111 can be compact.

Referring to fig. 1 and 2 and fig. 4, in an embodiment, the bottom housing 111 further includes a protrusion 1113, the protrusion 1113 is disposed at an end of the first portion 1111 in a third direction zz ', and the protrusion 1113 protrudes from an outer surface of the first portion 1111, wherein the third direction zz' is perpendicular to or at a predetermined angle with respect to the second direction xx 'and the first direction yy', respectively.

Specifically, in the present embodiment, since the projection 1113 projects upward from the outer surface (upper surface) of the first portion 1111, when the outer surface (upper surface) of the first portion 1111 is attached to the lower surface of the head and neck support region 11, the projection 1113 is higher than the lower surface of the head and neck support region 11. Further, since the projection 1113 is provided at one end of the first portion 1111 in the third direction zz' (corresponding to the longitudinal direction of the flat bed plate 10), the projection 1113 is located on the side of the whip support region 11 away from the flat bed plate 10.

Referring to fig. 4, preferably, when the magnetic resonance head coil 100 is mounted on the flat bed plate 10, the surface of the protrusion 1113 facing away from the first portion 1111 (i.e., the upper surface of the protrusion 1113) is flush with the upper surface of the head and neck support region 11, so that the upper surface of the protrusion 1113 and the upper surface of the head and neck support region 11 together form a mounting platform for easy mounting of a headrest and a positioning accessory. It can be seen that the upper surface of the protrusion 1113 can serve as an expansion space for the upper surface of the whiplash support region 11, expanding the installation space for the headrest and the positioning fitting.

Of course, in other embodiments, the upper surface of the boss may be lower than the upper surface of the skull support plate, such that the boss may also be used to mount the headrest and positioning accessories. For example, a cushion layer can be arranged on the convex part, so that the cushion layer is flush with the upper surface of the skull supporting plate, and the upper surface of the cushion layer and the upper surface of the skull supporting plate form a mounting platform together.

Referring to fig. 1 and 2 and fig. 4, in an embodiment, the first portion 1111 has a first end and a second end facing away from each other along the third direction zz'. A boss 1113 is disposed at the first end. The protrusion 1113 has a second groove 102 on a side thereof close to the second end, and the second groove 102 is recessed along the third direction zz' and along the second end toward the first end.

In particular, the second recess 102 is intended to accommodate the cervical support region 11. In the magnetic resonance radiotherapy simulation, when the magnetic resonance head coil 100 is installed on the flat bed plate 10, the second groove 102 is matched with the head and neck supporting region 11, so that the head and neck supporting region 11 is placed in the second groove 102, the installation position of the magnetic resonance coil 100 can be accurately positioned, and the magnetic resonance coil 100 is convenient to install. Further, because the second groove 102 is matched with the head and neck support region 11, the inner wall of the second groove 102 can be tightly matched with the side face of the head and neck support region 11, so that the upper surface of the head and neck support region 11 can be as close as possible to the upper surface of the protrusion 1113, a seamless connection state is almost achieved, and a complete mounting platform is conveniently provided for the headrest and the positioning accessories.

Of course, in other embodiments, there may be a certain distance between the upper surface of the whip region 11 and the protrusion 1113, and the upper surface of the protrusion 1113 may also be convenient to mount the headrest and positioning accessories to some extent.

Referring to fig. 1, in one embodiment, the mr head coil 100 further includes an upper coil 120. In one embodiment, the upper coil 120 can be flipped and/or distance adjusted relative to the bottom housing 111.

In an embodiment, one end of the upper coil 120 in the second direction is used to abut against or connect with one end of the first side housing 112 away from the bottom housing 111, and the other end of the upper coil 120 in the second direction is used to abut against or connect with one end of the second side housing 113 away from the bottom housing 111.

Specifically, the upper coil 120 abuts against or is connected to one end of the first side housing 112 away from the bottom housing 111 and one end of the second side housing 113 away from the bottom housing 111, respectively, so that the upper coil 120 is located above the lower coil 110, and the two together enclose an accommodating space. As shown in fig. 1, 6 and 7, the upper coil 120 encloses a third recess 103 which opens in the first direction yy', i.e. the third recess 103 opens downwards, so that the receiving space is formed by the first recess 101 together with the third recess 103 and is intended to receive the skull of the patient 20.

With reference to fig. 5 to 7, when the skull of the patient 20 is supported by the head and neck support region 11, the lower portion of the skull of the patient 20 is located in the first recess 101 and surrounded by the lower coil 110, and the upper portion of the skull of the patient 20 is located in the third recess 103 and surrounded by the upper coil 120, so that the skull of the patient 20 can be surrounded, and thus a better signal-to-noise ratio can be provided, and the quality of the magnetic resonance image can be improved.

Referring to fig. 1, in an embodiment, the magnetic resonance head coil 100 further includes: a telescoping assembly 130. The upper end of the telescopic assembly 130 is connected to the upper coil 120, and the lower end of the telescopic assembly 130 is connected to the lower coil 110. When the telescopic assembly 130 performs the extending and shortening movement, the top of the upper coil 120 and the bottom shell 111 of the lower coil 110 can be driven to move relatively, i.e. the top of the upper coil 120 can be driven by the telescopic assembly 130, so as to change the distance between the top of the upper coil 120 and the bottom shell 111 of the lower coil 110.

Specifically, when the telescopic assembly 130 performs an extending or shortening movement, the overall length of the telescopic assembly 130 is lengthened or shortened accordingly. Since the upper end of the telescopic assembly 130 is connected to the upper coil 120 and the lower end of the telescopic assembly 130 is connected to the lower coil 110, when the telescopic assembly 130 performs an extension or contraction movement, the upper end and the lower end of the telescopic assembly 130 are far away from or close to each other, so that the upper coil 120 and the lower coil 110 move relatively to each other.

In the magnetic resonance radiotherapy simulation, the bottom shell 111 of the lower coil 110 is attached to the lower surface of the head and neck support region 11, and the position of the bottom shell is fixed, so that the telescopic assembly 130 drives the upper coil 120 to move up and down when performing extension or contraction movement, and further the distance between the top of the upper coil 120 and the bottom shell 111 of the lower coil 110 is changed. Since the distance between the top of the upper coil 120 and the bottom case 111 of the lower coil 110 is changed, the height dimension of the accommodating space defined by the upper coil 120 and the lower coil 110 in the first direction yy 'is changed, so that the height of the accommodating space in the first direction yy' can be flexibly adjusted. Specifically, the height of the accommodation space can be adjusted to be increased to facilitate the placement of the headrest, the positioning fitting, and the like. It is also possible to obtain a higher signal-to-noise ratio by adjusting the height of the receiving space such that the upper coil 120 is as close as possible to the face of the patient 20.

The upper end of the telescopic assembly 130 may be connected to the top inner surface of the upper coil 120, or may be connected to the side inner surface of the upper coil 120. The lower end of retraction assembly 130 may be mounted to boss 1113 or may be mounted to first portion 1111 or second portion 1112.

In this embodiment, the first side housing 112 is a flexible housing, the second side housing 113 is a flexible housing, and the housing of the upper coil 120 is a hard housing, so that, in the magnetic resonance radiotherapy simulation, when the telescopic assembly 130 performs an extension or contraction motion, the housing of the upper coil 120 moves upward or downward, and then both ends of the upper coil 120 respectively pull the first side housing 112 and the second side housing 113 upward or press the first side housing 112 and the second side housing 113 downward. Since the first side case 112 is a flexible case and the second side case 113 is a flexible case, the first side case 112 and the second side case 113 can accommodate upward pulling or downward pressing of the case of the upper coil 120 to accommodate the upward and downward movement of the upper coil 120.

In one embodiment, the first side case 112 and the upper coil 120 have a connectable state and a separable state, and the second side case 113 and the upper coil 120 have a connectable state and a separable state. For example, the first side housing 112 and the upper coil 120 may be removably connected. The second side housing 113 and the upper coil 120 may be detachably connected.

In particular, prior to radiotherapy in a magnetic resonance radiotherapy simulation, the tumor location of the patient's skull needs to be located. Generally, positioning lasers are respectively arranged at a plurality of different positions of the skull of a patient, and a plurality of positioning lasers are used for simultaneously aiming at the same laser receiver outside a magnetic resonance head coil, so that the tumor position of the patient is positioned.

In some patients, the tumor position in the skull is located closer to the bottom of the skull, and it is necessary to position the positioning laser near the bottom of the skull and then to cause the laser emitted by the positioning laser to exit the magnetic resonance coil. In this embodiment, the first side case 112 may be separated from the upper coil 120, and the second side case 113 may be separated from the upper coil 120. Because the first side shell 112 is a flexible shell and the second side shell 113 is a flexible shell, the first side shell 112 and the second side shell 113 can be pressed downwards to a certain extent (even to a horizontal state) to avoid laser emitted by the positioning laser, so that even if the positioning laser is arranged at a position close to the bottom of the skull of a patient, the laser emitted by the positioning laser can be emitted to the same laser receiver outside the magnetic resonance head coil from the upper part of the first side shell 112/the second side shell 113, and further, a tumor at a lower position in the skull of the patient can be conveniently positioned. When the upper coil 120 is used, the first side case 112 may be connected to the upper coil 120, and the second side case 113 may be connected to the upper coil 120.

In another embodiment, the housing, which may also be an upper coil, is a flexible housing, while the first side housing is a rigid housing and the second side housing is a rigid housing. Under the condition, in the magnetic resonance radiotherapy simulation, the first side shell and the second side shell are not moved, and the telescopic assembly drives the shell of the upper coil to move up and down when doing extension or shortening movement. And because the shell of the upper coil is a flexible shell, the top of the upper coil can move up and down to change the distance between the lower coil and the bottom shell of the lower coil under the condition that the lower end of the shell of the upper coil is connected with the first side shell and the second side shell. In this embodiment, the lower end of the telescopic assembly may also be connected with the first side housing and/or the second side housing.

In yet another embodiment, the first side housing is a rigid housing and the second side housing is a rigid housing, both of which cannot be pressed downward at will. Therefore, the first side casing and/or the second side casing are provided with a hollowed-out opening, specifically, a first through hole penetrating along the second direction is formed in one end, close to the bottom casing, of the first side casing, a second through hole penetrating along the second direction is formed in one end, close to the bottom casing, of the second side casing, and the first through hole and the second through hole are hollowed-out openings. When positioning the intracranial tumor of the patient through the positioning laser device arranged at the bottom of the skull of the patient, the laser emitted by the positioning laser device can be emitted out of the magnetic resonance head coil from the hollowed-out opening (the first through hole and/or the second through hole), thereby, even if the positioning laser device is arranged at the position close to the bottom of the skull of the patient, the laser emitted by the positioning laser device can also be emitted out to the same laser receiver outside the magnetic resonance head coil, and further the intracranial lower tumor of the patient is conveniently positioned.

Referring to fig. 8 in conjunction with fig. 1 and 6, in an embodiment, the telescopic assembly 130 includes: a body member 131, a rotating member 132, and a telescoping member 133. In this embodiment, the expansion member 133 is connected to the upper coil 120, and the body member 131 is connected to the lower coil 110.

Specifically, the lower end of the main body 131 is mounted on the boss 1113 or the first portion 1111 or the second portion 1112. The rotating member 132 is sleeved on the main body 131 and rotatably connected to the main body 131. The rotating member 132 is sleeved on the telescopic member 133 and is in threaded transmission with the telescopic member 133. The main body 131, the rotating member 132 and the telescopic member 133 are axially identical. The upper end of the telescopic member 133 is connected to the upper coil 120.

When the extension and contraction of the telescopic assembly 130 needs to be adjusted, the main body member 131 is not moved. By rotating the rotating member 132, the rotating member 132 drives the telescopic member 133 to move up and down through the screw transmission with the telescopic member 133, so that the telescopic member 133 moves close to or away from the bottom housing 111, and further drives the top of the upper coil 120 to move close to or away from the bottom housing 111. The telescopic assembly 130 in the embodiment has a simple structure and is convenient to adjust.

In other embodiments, the telescopic assembly is not limited to the above structure, and other structures in the prior art, such as a rack and pinion structure, a spring sliding mechanism, etc., may be adopted.

In other embodiments, the body member may be connected to the upper coil and the telescoping member connected to the lower coil.

Referring to fig. 8, further, the rotating member 132 has a stepped hole extending along the axial direction therein, the stepped hole includes a first hole 104 and a second hole 105, the inner diameter of the first hole 104 is smaller than the inner diameter of the second hole 105, and a step surface 132a is formed at the connection position of the hole wall of the first hole 104 and the hole wall of the second hole 105.

The retraction assembly 130 further includes a snap ring 1321. An outer circumferential surface of the snap ring 1321 is coupled to an inner wall of the second hole 105, and the snap ring 1321 and the stepped surface 132a are spaced apart in an axial direction of the rotating member 132, so that a stopper groove (not numbered) is formed between the snap ring 1321 and the stepped surface 132 a.

The outer wall of the body member 131 near the end of the telescopic member 133 is provided with a radially protruding catch 1311. The snap 1311 may extend circumferentially around the body piece 131. The locking projection 1311 is engaged with the limiting groove, so that the limiting groove can limit the relative position of the locking projection 1311 along the axial direction of the rotating member 132, and further, the rotating member 132 and the main body member 131 can be connected in a circumferential rotation manner and relatively immovable along the axial direction.

Referring to fig. 8, in an embodiment, the main body 131 is sleeved on the expansion member 133. The outer wall of the telescopic member 133 is provided with a guide groove (not shown) extending in the axial direction. Retraction assembly 130 also includes a guide 134. The guide 134 is fixedly coupled to the inner wall of the body member 131 and movably engaged with the guide groove. When the telescopic member 133 is extended or retracted relative to the body member 131, the movement direction of the telescopic member 133 when extended or retracted can be guided by the engagement of the guide member 134 with the guide groove, so that the telescopic member 133 and the body member 131 can be ensured not to rotate relatively.

As shown in fig. 9, in an embodiment, the upper coil 120 has an open state and a closed state, in the closed state, the upper coil 120 blocks the opening of the first groove 101, and in the open state, the upper coil 120 at least partially removes the opening of the first groove 101, so as to at least partially expose the opening of the first groove 101.

Specifically, referring to fig. 10, in the present embodiment, the lower end of the telescopic assembly 130 is rotatably connected to the bottom housing 111, and the telescopic assembly 130 can rotate relative to the lower coil 110 around the axis of the third direction, so that the telescopic assembly 130 can drive the upper coil 110 to rotate relative to the lower coil 110 around the axis of the third direction together. The upper coil 120 can shield or expose the opening of the first groove 101 by rotating the upper coil 120 relative to the lower coil 110 around the axis of the third direction, so that the skull of the patient 20 can conveniently enter the first groove 101 from the opening of the first groove 101, and the installation of the headrest and the positioning accessory is convenient, so that the workflow of the magnetic resonance radiotherapy simulation is simple.

More specifically, referring to fig. 11, a rotation limiting member 141 is disposed on the bottom housing 111, a rotating shaft seat 142 is disposed at the lower end of the telescopic assembly 130, a cylindrical hole is disposed on the rotation limiting member 141, and a cylindrical shaft is disposed on the rotating shaft seat 142, so that the rotation limiting member 141 and the rotating shaft seat 142 can rotate relative to each other through the cooperation between the cylindrical hole and the cylindrical shaft, and further the telescopic assembly 130 and the bottom housing 111 can rotate relative to each other.

In this embodiment, the first side housing 112 is detachably connected to the upper coil 120, and the second side housing 113 is detachably connected to the upper coil 120, so that when the upper coil 120 rotates around the axis of the third direction relative to the lower coil 110, the first side housing 112 can be detached from the upper coil 120, the second side housing 113 can be detached from the upper coil 120, and the rotation of the upper coil 120 around the axis of the third direction relative to the lower coil 110 is prevented from being affected. Moreover, in this embodiment, the first side housing 112 and the upper coil 120 may be detached, and the second side housing 113 and the upper coil 120 may be detached, so that the first side housing 112 and the second side housing 113 are separated from the upper coil 120, respectively, thereby facilitating to press the first side housing 112 and the second side housing 113 to avoid the laser emitted by the positioning laser.

Referring to fig. 12, in another embodiment, the upper coil 120 may be rotatably connected to the telescopic assembly 130, so that the upper coil 120 can rotate around the axis of the third direction relative to the telescopic assembly 130, and further, the upper coil 120 can rotate around the axis of the third direction relative to the lower coil 110.

Referring to fig. 13, in another embodiment, the telescopic member 133 of the telescopic assembly 130 is detachably connected to the main body member 131, and the connection between the upper coil 120 and the lower coil 110 is realized through the telescopic assembly 130. When the telescopic member 133 is coupled to the body member 131, the upper coil 120 may be coupled to the lower coil 110, and the upper coil 120 blocks the opening of the first recess 101. When the telescopic member 133 is detached from the body member 131, the upper coil 120 can be detached from the lower coil 110, and the upper coil 120 can expose the opening of the first recess 101.

An embodiment of the present application still provides a radiotherapy locating component. This radiotherapy locating component includes: a flat bed plate 10 and a head coil 100. The flat bed plate 10 includes a neck support region 11. The head coil 100 at least comprises a lower coil 110, the lower coil 110 comprises a bottom shell 111 and at least one side shell, a bottom antenna 114 is arranged in or on the bottom shell 111, a side antenna is arranged in the side shell, and the bottom shell 111 and the side shell jointly enclose a first groove 101 which is concave towards a first direction. The neck support area of the flat bed plate 10 is placed in the first groove 101, and the neck support area of the flat bed plate is in planar contact with the bottom case 111, so that the head coil 100 is fitted with the flat bed plate 10.

In one embodiment, the radiotherapy positioning assembly further comprises an upper coil 120, the upper coil 120 being capable of being flipped and/or distance adjusted relative to the bottom housing 111.

In an embodiment, the side housing includes a first side housing 112 and a second side housing 113 respectively disposed at two sides of the bottom housing 111, and the first side housing 112 or the second side housing 113 has a hollow opening.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (12)

1. A magnetic resonance head coil (100) comprising at least a lower coil (110), the lower coil (110) comprising:

a bottom case (111) including a first portion (1111) and a second portion (1112), the first portion (1111) and the second portion (1112) forming an accommodation cavity, a bottom antenna (114) being disposed in the accommodation cavity, wherein the first portion (1111) has a flat plate shape, and an inner surface of the first portion (1111) faces a first direction;

a first side shell (112) connected with one end of the bottom shell (111) in the second direction, wherein a first side antenna (116) is arranged in the first side shell (112); and

and the second side shell (113) is connected with the other end of the bottom shell (111) in the second direction, and the second side shell (113), the first side shell (112) and the bottom shell (111) jointly enclose a first groove (101) which is concave towards the first direction.

2. The magnetic resonance head coil (100) according to claim 1,

the bottom antenna (114) is disposed in close proximity to an inner surface of the first portion (1111), the first portion (1111) further having an outer surface;

the bottom case (111) further includes a boss (1113), the boss (1113) being disposed at one end of the first portion (1111) in a third direction and protruding from the outer surface of the first portion (1111).

3. The magnetic resonance head coil (100) according to claim 2, characterized in that the first portion (1111) has a first end and a second end facing away from each other in a third direction, the protrusion (1113) being provided at the first end, a side of the protrusion (1113) near the second end being provided with a second groove (102) recessed in the third direction.

4. The magnetic resonance head coil (100) according to claim 1, further comprising an upper coil (120), the upper coil (120) being tiltable and/or distance adjustable with respect to the bottom housing (111).

5. The magnetic resonance head coil (100) according to claim 4, further comprising: a telescopic assembly (130), wherein the upper end of the telescopic assembly (130) is connected with the upper coil (120), and the lower end of the telescopic assembly (130) is connected with the lower coil (110); when the telescopic assembly (130) makes extension and contraction movement, the top of the upper coil (120) can be driven to change the distance between the top of the upper coil (120) and the bottom shell (111) of the lower coil (110).

6. The magnetic resonance head coil (100) according to claim 4, characterized in that the first side housing (112) is detachably connected with the upper coil (120) and the second side housing (113) is detachably connected with the upper coil (120).

7. The magnetic resonance head coil (100) according to claim 5 or 6, characterized in that the first side housing (112) is a flexible housing and the second side housing (113) is a flexible housing, both ends of the upper coil (120) being abuttable against the first side housing (112) and the second side housing (113), respectively.

8. The magnetic resonance head coil (100) according to claim 5, characterized in that the telescopic assembly (130) comprises:

a main body member (131);

a rotating member (132) rotatably connected to the main body member (131); and

a telescoping member (133) in threaded communication with the rotating member (132), one of the body member (131) and the telescoping member (133) being connected to the upper coil (120), the other of the body member (131) and the telescoping member (133) being connected to the lower coil (110).

9. The magnetic resonance head coil (100) according to claim 5, characterized in that the upper coil (120) has an open state in which the upper coil (120) blocks the opening of the first recess (101) and a closed state in which the upper coil (120) at least partially removes the opening of the first recess (101) so as to at least partially expose the opening of the first recess (101).

10. A radiation therapy positioning assembly, comprising:

a flat bed plate (10) comprising a head and neck support region;

the head coil (100) at least comprises a lower coil (110), the lower coil (110) comprises a bottom shell (111) and at least one side shell, a bottom antenna (114) is arranged in or on the surface of the bottom shell (111), a side antenna is arranged in the side shell, and the bottom shell (111) and the side shell jointly enclose a first groove (101) which is concave towards a first direction;

the head and neck supporting area of the flat bed plate (10) is arranged in the first groove (101), and the head and neck supporting area of the flat bed plate is in planar contact with the bottom shell (111), so that the head coil (100) is matched with the flat bed plate (10).

11. Radiotherapy positioning assembly according to claim 10, further comprising an upper coil (120), the upper coil (120) being supported by a telescopic assembly (130) enabling the upper coil (120) to be flipped and/or distance adjusted with respect to the bottom housing (111).

12. Radiotherapy positioning assembly according to claim 10, characterized in that the lateral housing comprises a first lateral housing (112) and a second lateral housing (113) respectively located at two sides of the bottom housing (111), and the first lateral housing (112) or the second lateral housing (113) is opened with a hollowed-out opening.

Images