CN112816927A - Magnetic resonance apparatus, scan assisting structure, and scan assisting pad - Google Patents
Magnetic resonance apparatus, scan assisting structure, and scan assisting pad Download PDFInfo
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- CN112816927A CN112816927A CN202011628035.1A CN202011628035A CN112816927A CN 112816927 A CN112816927 A CN 112816927A CN 202011628035 A CN202011628035 A CN 202011628035A CN 112816927 A CN112816927 A CN 112816927A
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- 238000003384 imaging method Methods 0.000 claims abstract description 42
- 239000003989 dielectric material Substances 0.000 claims description 40
- 239000000945 filler Substances 0.000 claims description 20
- 230000004308 accommodation Effects 0.000 claims description 3
- 238000003745 diagnosis Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 13
- 210000001015 abdomen Anatomy 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 230000003902 lesion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000002595 magnetic resonance imaging Methods 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34007—Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention relates to a magnetic resonance apparatus, a scan assist structure, and a scan assist pad. The scanning auxiliary pad is arranged corresponding to the part to be imaged of the patient; the scan assistant pad includes: an outer member having a receiving cavity; and a dielectric member disposed in the receiving cavity to modify a radio frequency magnetic field of the magnetic resonance apparatus. The scanning auxiliary pad with the dielectric part is used for auxiliary imaging of the part to be imaged of a patient, so that the dielectric part can improve the uniformity of a radio frequency magnetic field, the part to be imaged is ensured to be always in the uniform radio frequency magnetic field, the imaging quality of an image is ensured, and the diagnosis of medical staff is facilitated.
Description
Technical Field
The invention relates to the technical field of medical imaging equipment, in particular to magnetic resonance equipment, a scanning auxiliary structure and a scanning auxiliary pad.
Background
At present, a magnetic resonance apparatus scans a portion to be imaged of a patient to obtain an imaging image of the portion to be imaged of the patient, and a medical staff diagnoses the patient according to the imaging image. Generally, to ensure the imaging effect of the magnetic resonance apparatus, a local coil is usually used, the local coil corresponds to the lesion position of the patient, and a transmitting coil in the local coil transmits a signal passing through the lesion position of the human body and is received by a receiving coil to image the lesion position of the patient. However, the radio frequency magnetic field generated by the local coil has the problem of non-uniformity, so that the accuracy of receiving information by the receiving coil is influenced, the imaging effect of a focus position is further influenced, the imaging quality of an image is poor, and the diagnosis of medical staff is influenced.
Disclosure of Invention
Therefore, it is necessary to provide a magnetic resonance apparatus, a scan assisting structure, and a scan assisting pad that ensure good uniformity of a radio frequency magnetic field, in order to solve the problem of poor imaging quality caused by non-uniform radio frequency magnetic field of the existing magnetic resonance apparatus.
A scanning auxiliary pad is arranged corresponding to a part to be imaged of a patient; the scan assistant pad includes:
an outer member having a receiving cavity; and
a dielectric member disposed in the receiving cavity to modify a radio frequency magnetic field of the magnetic resonance apparatus.
In one embodiment, the scanning auxiliary pad further comprises a flexible filling member, which is disposed in the accommodating cavity and is used for filling the accommodating cavity;
the dielectric member is disposed in the accommodation chamber or the flexible filling member.
In one embodiment, the position of the dielectric element in the flexible filler element is adjustable.
In one embodiment, the dielectric member includes a dielectric material filled in the flexible filler.
In one embodiment, the dielectric part further comprises a carrier part for carrying the dielectric material, the carrier part being arranged in the flexible filling piece.
In one embodiment, the amount of the dielectric material in the flexible filler is adjustable.
In one embodiment, the number of the dielectric parts is multiple, and the amount of the dielectric material in each bearing part is the same and/or different;
the bearing parts are arranged at intervals or connected in sequence, and the shapes of the bearing parts are the same and/or different.
In one embodiment, the outer member has a mounting opening communicating with the receiving cavity for mounting the dielectric member.
A scanning auxiliary structure, comprising a receiving coil and a scanning auxiliary pad as described in any of the above technical features, wherein the scanning auxiliary pad is disposed on the receiving coil;
the number of the scanning auxiliary pads is at least one.
In one embodiment, the receiving coil is a head coil bottom cover, and the number of the scanning auxiliary pads is multiple, namely a head support pad and at least one head pad plug;
the head support pad is arranged at the bottom of the accommodating space of the head coil bottom cover and is used for bearing the head of the patient; the headrest plug is arranged on the side face of the accommodating space and used for positioning the head of the patient.
In one embodiment, the number of the receiving coils is two, and the receiving coils are respectively a first receiving part and a second receiving part, and the number of the scanning auxiliary pads is multiple, and the scanning auxiliary pads are respectively a first auxiliary pad and a second auxiliary pad;
the first auxiliary pad is arranged on the first receiving part, the second auxiliary pad is arranged on the second receiving part, and the second receiving part and the first receiving part are enclosed to form a bearing space for bearing a part to be imaged.
In one embodiment, the scanning auxiliary pad further comprises a third auxiliary pad, and the third auxiliary pad is disposed on the first auxiliary pad and/or the second auxiliary pad.
In one embodiment, the first receiving element is a spine scanning receiving coil and the second receiving element is a body scanning receiving coil;
the first auxiliary pad is a spine auxiliary pad, and the second auxiliary pad is a body auxiliary pad.
A magnetic resonance apparatus comprising an imaging body having a magnet bore, a scan bed and a scan assist structure as claimed in any one of the above features;
the scanning auxiliary structure is arranged on the scanning bed and corresponds to a part of a patient to be imaged, and the scanning bed can drive the patient to enter and exit the magnet hole.
After the technical scheme is adopted, the invention at least has the following technical effects:
when the magnetic resonance device, the scanning auxiliary structure and the scanning auxiliary cushion are used, the scanning auxiliary cushion corresponds to a part to be imaged of a patient, and the dielectric component is arranged on the outer layer component, so that the radio frequency magnetic field of the magnetic resonance device can be improved, the radio frequency magnetic field of the magnetic resonance device can be uniformly distributed, and the imaging accuracy of the belt imaging component is ensured. The scanning auxiliary pad with the dielectric part is used for carrying out auxiliary imaging on the part to be imaged of a patient, the problem of poor imaging effect caused by nonuniform radio frequency magnetic field at present is effectively solved, the dielectric part can improve the uniformity of the radio frequency magnetic field, the part to be imaged is guaranteed to be always in the uniform radio frequency magnetic field, the imaging quality of images is guaranteed, and diagnosis of medical staff is facilitated.
Drawings
FIG. 1 is a schematic view of a scan assistant pad according to an embodiment of the present invention;
FIG. 2 is a schematic view of the scan assistant pad shown in FIG. 1 applied to an embodiment of a scan assistant structure;
FIG. 3 is a schematic view of the scan assistant pad of FIG. 1 applied to another embodiment of a scan assistant structure;
FIG. 4 is a schematic view of the scan aid pad section shown in FIG. 1.
Wherein: 100. scanning the auxiliary structure; 110. scanning the auxiliary pad; 111. an outer layer member; 112. a flexible filler member; 113. a dielectric member; 110a, a headrest pad; 110b, a headrest plug; 110c, a first auxiliary pad; 110d, a second auxiliary pad; 120. a head coil bottom cover; 130. a first receiving member; 140. a second receiving member; 200. a scanning bed.
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 invention 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 invention.
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, the present invention provides a scan assistant pad 110. The scan aid pad 110 is applied in a scan aid structure 100 of a magnetic resonance apparatus. The scan auxiliary pad 110 is disposed corresponding to the portion of the patient to be imaged, and can be matched with the imaging body of the magnetic resonance device to obtain the imaging image of the portion of the patient to be imaged, so that the medical staff can diagnose the patient according to the imaging image.
It can be understood that, when imaging is performed by the current magnetic resonance apparatus, in order to ensure the imaging effect of the magnetic resonance apparatus, a local coil is usually used, the local coil is limited to correspond to the focus position of the patient, and a transmitting coil in the local coil transmits a signal passing through the focus position of the human body and is received by a receiving coil, so as to image the focus position of the patient. However, the radio frequency magnetic field generated by the local coil has a non-uniform problem, which further affects the accuracy of receiving information by the receiving coil, and further affects the imaging effect of the focus position.
To this end, the present invention provides a novel scanning assistant pad 110. The scanning auxiliary pad 110 can be disposed corresponding to a portion to be imaged of a patient, so as to ensure uniformity of a radio frequency magnetic field and quality of an imaging image of the portion to be imaged. The specific structure of the scan assistant pad 110 is described in detail below.
Referring to fig. 1, in one embodiment, the scan assist pad 110 includes an outer layer member 111 and a dielectric member 113. The outer member 111 has a receiving cavity. A dielectric member 113 is disposed in the receiving chamber to modify the radio frequency magnetic field of the magnetic resonance apparatus.
The outer layer 111 plays a role in protecting each component of the scanning auxiliary pad 110, so as to prevent each component inside the outer layer 111 from being exposed and ensure the use performance. Specifically, the outer layer member 111 has a receiving cavity, that is, the outer layer member 111 is a hollow structure, and each component of the scanning auxiliary pad 110 is disposed in the receiving cavity of the outer layer member 111. When the scanning auxiliary pad 110 of the present invention is used, the outer layer member 111 may be disposed under the portion to be imaged, or may be disposed around the portion to be imaged, as long as the scanning auxiliary pad 110 can correspond to the portion to be imaged of the patient.
The radio frequency magnetic field may be non-uniform during the imaging process due to the magnetic resonance apparatus. For this, the present invention adds a dielectric member 113 in the outer layer member 111 of the scan assistant pad 110. The dielectric member 113 is disposed behind the scan assist pad 110, and the dielectric member 113 can improve the radio frequency magnetic field of the magnetic resonance apparatus so that the radio frequency magnetic field is uniform. Therefore, the part to be imaged can be in a uniform radio frequency magnetic field environment, the effect of improving the image quality is achieved, and the imaging quality of the part to be imaged is ensured.
When the scanning auxiliary pad 110 of the above embodiment is used, the scanning auxiliary pad 110 is disposed corresponding to a portion to be imaged of a patient, and is used in cooperation with an imaging machine body of a magnetic resonance apparatus to perform imaging, so as to obtain an imaging image of the portion to be imaged. The scanning auxiliary pad 110 with the dielectric part 113 is used for auxiliary imaging of the part to be imaged of a patient, so that the problem of poor imaging effect caused by non-uniform radio frequency magnetic field at present is effectively solved, the uniformity of the radio frequency magnetic field can be improved by the dielectric part 113, the part to be imaged is ensured to be always in the uniform radio frequency magnetic field, the imaging quality of images is ensured, and the diagnosis of medical staff is facilitated.
Alternatively, the outer layer member 111 is made of a material such as PU leather or artificial leather. Of course, in other embodiments of the present invention, the outer skin member 111 may have other outer skin structures that can cooperate with the soft infill to ensure softness. This enables the outer layer member 111 to have a high degree of flexibility, which improves the comfort of the scanning assistant pad 110 when it comes into contact with the portion to be imaged.
Further, the size of the outer layer member 111 is not limited in principle as long as it can correspond to the portion to be imaged. Such as the size of the scan aid pad 110 required for different areas to be imaged, and correspondingly, the size of the outer member 111 may vary accordingly. In addition, in the same usage scenario, the number of the scanning auxiliary pads 110 may also be multiple, and the sizes of the multiple scanning auxiliary pads 110 are different, so as to meet different usage requirements.
Referring to fig. 1 to 3, in addition, the shape of the scanning auxiliary pad 110 may be designed according to a portion to be imaged. For example, when the portion to be imaged is the head of a patient, the scan assisting pad 110 needs to be designed to be a concave structure to bear the head of the patient; for example, when the portion to be imaged is the spine of the patient, the scan assisting pad 110 is disposed in a flat plate shape; for example, when the portion to be imaged is the abdomen of the patient, the scan assisting pad 110 may be disposed in an arc shape so as to surround the periphery of the portion to be imaged; and so on.
Alternatively, the flexible filling member 112 is made of EVA (ethylene-vinyl acetate copolymer) or an elastic rubber pad. Of course, in other embodiments of the present invention, the flexible filler member 112 may be made of other types of flexible materials.
Alternatively, the outer layer member 111 and the flexible filling member 112 are joined together by heat pressing, bonding, or the like. Therefore, the outer layer part 111 and the flexible filling piece 112 can be fixedly arranged, the flexible filling piece 112 is prevented from moving in the outer layer part 111, and the use performance is ensured. Of course, in other embodiments of the present invention, the outer layer member 111 may be fixed to the inner flexible filling member 112 by other means.
In one embodiment, the scan assistant pad 110 includes a flexible filling member 112, and the flexible filling member 112 is disposed in the accommodating cavity for filling the accommodating cavity. The dielectric member 113 is disposed in the receiving cavity or the flexible filling member 112. A flexible filler 112 is provided in the receiving cavity of the outer member 111 to support the outer member 111, improving the supporting performance of the outer member 111, so that the outer member 111 is expanded. Also, the flexible padding 112 can also increase the softness of the outer layer member 111. When the scanning auxiliary pad 110 is placed below the portion to be imaged, the flexible filling member 112 can flexibly support the portion to be imaged through the outer layer member 111, thereby improving the comfort in use.
It will be appreciated that with the addition of the flexible filler member 112, the dielectric element 113 may be located within the receiving cavity, i.e., between the flexible filler member 112 and the outer layer member 111, or may be disposed within the flexible filler member 112. In the present invention, the dielectric member 113 is disposed on the flexible filling member 112 only for an example. The structure and operation of the dielectric element in the receiving cavity are substantially the same as those of the flexible filling member 112, and thus the description thereof is omitted here.
Referring to fig. 1, in one embodiment, the outer member 111 has mounting openings that communicate with the flexible filler 112 for mounting the dielectric member 113. After the outer layer member 111 and the flexible filling member 112 are fixed by hot pressing or bonding, a mounting opening is reserved on the side edge of the outer layer member 111, and the mounting opening can realize filling and mounting of the dielectric member 113, so that the dielectric member 113 can be mounted in the filling member. Also, after the dielectric member 113 is mounted, the mounting opening of the outer layer member 111 may be sealed by an edge sealing process to prevent the dielectric member 113 from being exposed.
It will be appreciated that for magnetic resonance imaging, it is difficult to achieve homogeneity of the magnetic field at the site to be imaged, such as the spine, abdomen, etc. waiting for the site to be imaged. After the scan auxiliary pad 110 is provided with the mounting opening, in an actual use process, the magnetic field detection device can be used for detecting the radio frequency magnetic field of magnetic resonance imaging, the position of the uneven radio frequency magnetic field, which corresponds to the position of the scan auxiliary pad 110, is mounted with the dielectric component 113 into the scan auxiliary pad 110 through the mounting opening, so that the radio frequency magnetic field at the position is improved, the uniformity of the radio frequency magnetic field is ensured, and the imaging effect is further ensured.
In an embodiment, the position of the dielectric part 113 in the flexible filler part 112 is adjustable. That is, the dielectric member 113 may be disposed according to the uniformity of the radio frequency magnetic field during use. Before imaging the part of the patient to be imaged, the uniformity of the radio frequency magnetic field is detected by the magnetic field detection device. Assuming that the uniformity of the positions of the rf magnetic field is good and the uniformity of the positions of the dielectric part 113 is poor, after the dielectric part 113 is mounted on the flexible filling member 112, the position of the dielectric part 113 in the flexible filling member 112 is adjusted, so that the flexible filling member 112 can be set corresponding to the rf magnetic field with poor uniformity, and the dielectric part 113 can ensure the uniformity of the rf magnetic field by improving the performance of the rf magnetic field.
In one embodiment, the dielectric member 113 includes a dielectric material filled in the flexible filling member 112. The dielectric member 113 ensures uniformity of the radio frequency magnetic field by a dielectric material. It can be understood that the dielectric material is provided in a powder form and can be directly placed in the flexible filling member 112, and the exposure of the dielectric material is avoided by the flexible filling member 112, so that the tightness of the mounted dielectric material is ensured.
Optionally, the dielectric material is a mixture of barium titanate. Of course, in other embodiments of the present invention, the dielectric material may be other materials such as calcium titanate and magnesium titanate.
In an embodiment, the dielectric part 113 further comprises a carrier part for carrying the dielectric material, the carrier part being arranged in the flexible filler piece 112. The carrying part can carry the dielectric material so that the dielectric part 113 can be formed as a whole, so that the dielectric material can be accurately positioned in the flexible filling member 112, and the position of the dielectric material is ensured to be accurate.
Alternatively, the carrying part may be a carrying plate, and of course, in other embodiments of the present invention, the carrying part may also be shaped as a carrying bag. After the bearing part bears the dielectric material, when the radio frequency magnetic field bearing device is used, the dielectric part 113 is directly placed at a required position, the uniformity of the radio frequency magnetic field at the position can be ensured, the operation efficiency is improved, and the use is convenient.
In one embodiment, the amount of dielectric material in the flexible filler 112 is adjustable. After detecting the homogeneity of the rf magnetic field by the magnetic field detection device, the amount of dielectric material needed for locations with poor homogeneity has been determined, and the actual needed amount of dielectric material can be placed directly in the flexible filler 112. Of course, the amount of the dielectric material in the flexible filling member 112 can be adjusted according to the actual use condition of the rf magnetic field, so as to meet the use condition.
Alternatively, the amount of dielectric material in the flexible filler 112 may be directly adjusted; of course, in other embodiments of the present invention, the amount of the dielectric material in the flexible filling member 112 can be adjusted by adjusting the amount of the dielectric material on the carrying portion.
In one embodiment, the number of the dielectric member 113 is plural. That is, the scan assistant pad 110 may be provided with a plurality of dielectric members 113. It is to be understood that one dielectric member 113 may be provided in the outer layer member 111 of one scanning auxiliary pad 110, and a plurality of dielectric members 113 may be provided. When the area of the portion to be imaged is large or the structure is complicated, the radio frequency magnetic field may not be uniform through one dielectric member 113. Therefore, by increasing the number of dielectric members 113 in the scan auxiliary pad 110, the number of dielectric members 113 can correspond to the uneven positions of the rf magnetic field, respectively, to improve the rf magnetic field.
In an embodiment, the amount of dielectric material in each carrier is the same and/or different. The amount of dielectric members 113 in the carrier part may be varied according to actual use requirements. When the number of the dielectric members 113 is plural, the amount of the dielectric material carried in the plural dielectric members 113 may be the same or different, and of course, may be partially the same or different, so as to improve the rf magnetic field with poor uniformity.
In one embodiment, the plurality of bearing parts are arranged at intervals or connected in sequence. The connection relationship between the plurality of carrying parts is not limited in principle as long as the dielectric material carried by the carrying parts can be used for realizing the uniform radio frequency magnetic field. The plurality of supporting parts may be disposed at corresponding positions of the scan assisting pad 110 according to a position where the uniformity of the rf magnetic field is not good. The bearing parts can be uniformly distributed or non-uniformly distributed. The respective support portions may or may not be connected.
In an embodiment, the bearing parts are identical and/or different in shape. It will be understood that the shape of the carrying part is not limited in principle, and may be set according to the actual use requirement as long as it can carry the dielectric material. The plurality of receiving portions may have the same shape or different shapes, or may be partially the same or partially different. Specifically, the setting can be performed according to the area of the radio frequency magnetic field with poor uniformity, and the setting can also be performed according to the amount of the dielectric material. Furthermore, when the area of the rf magnetic field with poor uniformity is large, one large carrying portion may be provided, or a plurality of small carrying portions may be provided.
As shown in fig. 4, to illustrate the dielectric material of the dielectric component 113 in the scanning auxiliary pad 110, the scanning auxiliary pad 110 is used to support the spine of the patient. The scan assisting pad 110 for supporting the spine of the patient needs to have a long length to carry the spine of the patient. The scan assistant pad 110 may be divided into a plurality of regions, and each region may be filled with a dielectric material, so that the amount of the dielectric material in each region is different by adjusting the density of the dielectric material to be different. Thus, for areas of poor uniformity, a dielectric material may be provided to provide uniformity of the radio frequency magnetic field in that area; in the area with good uniformity, no dielectric material can be arranged, and the uniformity of the radio frequency magnetic field in the area does not need to be improved.
As shown in FIG. 4, the scan assistant pad 110 for supporting the spine can be divided into 6 regions, A1 to A6. The density of the dielectric material of each area can be adjusted according to the actual uniformity of the radio frequency magnetic field so as to improve the uniformity of the radio frequency magnetic field.
Referring to fig. 1, the scan auxiliary pad 110 of the above embodiment may be disposed corresponding to a portion to be imaged, and may improve performance of a radio frequency magnetic field with poor uniformity, so that the portion to be imaged is in the radio frequency magnetic field with good uniformity. In addition, the scanning auxiliary pad 110 can be in soft contact with the part to be imaged, so that the comfort level of the patient in use is improved, and the use is convenient.
Referring to fig. 1 to 3, the present invention further provides a scanning auxiliary structure 100, which includes a receiving coil and the scanning auxiliary pad 110 of any of the above embodiments, wherein the scanning auxiliary pad 110 is disposed on the receiving coil. The number of the scan assistant pads 110 is at least one.
The receiving coil is a local coil and can achieve a better signal-to-noise imaging effect after being matched with an imaging body of the magnetic resonance equipment. The scanning auxiliary pad 110 is arranged behind the receiving coil, so that the flexible contact between the part to be imaged of the patient and the receiving coil can be ensured, and the comfort level in use is improved. Furthermore, the dielectric member 113 in the scan auxiliary pad 110 can also improve the uniformity of the radio frequency magnetic field of the receiving coil to ensure that the part to be imaged is in the uniform magnetic field of the device, thereby ensuring the imaging effect.
The scan assisting structure 100 can adopt at least one scan assisting pad 110, and the at least one scan assisting pad 110 supports the portion to be imaged of the patient, so as to position the portion to be imaged of the patient, improve the uniformity of the radio frequency magnetic field, avoid the occurrence of motion artifacts, and ensure the imaging quality.
Referring to fig. 1 and 2, in an embodiment, the receiving coil is a head coil bottom cover 120, and the number of the scanning auxiliary pads 110 is plural, and the plural scanning auxiliary pads are respectively a head rest pad 110a and at least one head rest plug 110 b. The head rest pad 110a is arranged at the bottom of the accommodating space of the head coil bottom cover 120 and is used for bearing the head of the patient; the headrest plug 110b is provided at a side of the accommodation space for positioning the head of the patient.
That is, the portion to be imaged is the head of the patient, and the scanning assistance structure 100 is an assistance structure for the head of the patient. At this time, the scanning auxiliary pad 110 is disposed in the head coil bottom cover 120, and the head of the patient is supported and limited by the scanning auxiliary pad 110, so that the head of the patient is prevented from moving, the radio frequency magnetic field of the head coil is improved, and the uniformity of the radio frequency magnetic field is ensured.
Specifically, when the portion to be imaged is the head of the patient, the number of the scanning auxiliary pads 110 is at least two, and the scanning auxiliary pads are respectively a headrest pad 110a and a headrest plug 110 b. The head rest pad 110a is adapted to the shape of the head coil bottom cover 120 and has a concave shape for receiving the head of the patient, so that the bottom of the head of the patient is accurately positioned in the head rest pad 110a of the head coil bottom cover 120. Also, the head gasket plug 110b is provided at a side of the head coil bottom cover 120 and contacts with a side of the patient's head, limiting the rotation of the patient's head.
The head support pad 110a and the head pad plug 110b of the scanning auxiliary structure 100 through the scanning auxiliary pad 110 are matched to limit and fix the head of the patient, the head of the patient is reliably positioned in the head coil bottom cover 120, the head of the patient is prevented from shaking in the head coil bottom cover 120, and the head position of the patient is guaranteed to be fixed. Moreover, the head support pad 110a can also improve the uniformity of the radio frequency magnetic field below the head of the patient, and the head support plug 110b can improve the uniformity of the radio frequency magnetic field on the side surface of the head of the patient, so that the imaging quality is ensured.
In this embodiment, as shown in fig. 2, a head pad 110a is disposed at the bottom of the head coil bottom cover 120, and a head pad plug 110b is disposed on a side wall of the head coil bottom cover 120. The head support pad 110a and the head support plug 110b are matched to have a positioning function, and the head of the patient is positioned. In addition, the head pad 110b and the head support pad 110a are uniformly filled with dielectric materials, so that a uniform radio frequency magnetic field can be achieved, and the effect of improving the image quality can be achieved. The requirement of clinical comfort can be met through the cooperation of head pad 110a and headrest plug 110b, patient's head also can be assisted to fix, can also have the shimming effect.
Of course, in other embodiments of the present invention, the number of the headrest plugs 110b is plural, and the headrest plugs 110b may be disposed on the peripheral side of the head coil bottom cover 120. It can be understood that, after the head of the patient is located in the head coil bottom cover 120, the head of the patient and the side wall of the head coil bottom cover 120 are at a certain distance, and the head of the patient can indirectly contact with the side wall of the head coil bottom cover 120 through the plurality of head pad plugs 110b, so that the position limitation of the head of the patient is realized. Furthermore, when the magnetic field detection device detects that the rf magnetic field is not uniform at a certain position, the head gasket 110b may be directly positioned at the position to improve the rf magnetic field at the position.
Referring to fig. 1 and 3, in an embodiment, the number of the receiving coils is two, which are respectively the first receiving part 130 and the second receiving part 140, and the number of the scanning auxiliary pad 110 is plural, which is respectively the first auxiliary pad 110c and the second auxiliary pad 110 d. The first auxiliary pad 110c is disposed on the first receiving member 130, the second auxiliary pad 110d is disposed on the second receiving member 140, and the second receiving member 140 and the first receiving member 130 enclose a carrying space for carrying a portion to be imaged.
The first receiving member 130 and the second receiving member 140 can form an image on a portion to be formed, and the first receiving member 130 and the second receiving member 140 enclose a carrying space in which the portion to be formed is located. The first auxiliary pad 110c is disposed on a surface of the first receiving member 130 facing the second receiving member 140, and the second auxiliary pad 110d is disposed on a surface of the second receiving member 140 facing the first receiving member 130. After the portion to be imaged is located in the bearing space, the portion to be imaged is in contact with the first auxiliary pad 110c and the second auxiliary pad 110d respectively, and the portion to be imaged is limited through the first auxiliary pad 110c and the second auxiliary pad 110 d.
It is understood that any portion, such as the spine, abdomen, legs, or other portions, can be imaged after the first receiving member 130, the second receiving member 140, the first auxiliary pad 110c and the second auxiliary pad 110d cooperate to form the carrying space.
In one embodiment, the scan auxiliary pad 110 further includes a third auxiliary pad, and the third auxiliary pad is disposed on the first auxiliary pad 110c and/or the second auxiliary pad 110 d. It can be understood that when the first auxiliary pad 110c and the second auxiliary pad 110d cannot improve the uniformity of the rf magnetic field, a third auxiliary pad may be added, and the third auxiliary pad is disposed at a position where the uniformity of the rf magnetic field is not good, so as to uniform the rf magnetic field.
As shown in fig. 3, in one embodiment, the first receiving element 130 is a spine scan receiving coil and the second receiving element 140 is a body scan receiving coil. The first auxiliary pad 110c is a spine auxiliary pad, and the second auxiliary pad 110d is a body auxiliary pad. The spine scan receiving coil is used for imaging a whole-body spine scan. The body auxiliary pad is used for imaging the abdomen.
That is, the scan assisting structure 100 is a combined structure of scanning the spine and the abdomen. The scan assist structure 100 is disposed on a scanning couch 200, and supports a patient and the scan assist structure 100 via the scanning couch 200. The first receiving member 130 and the first auxiliary pad 110c have a long length, can cover the spine of the patient, and are disposed on the scanning bed 200. The second receiving member 140 and the second auxiliary pad 110d are disposed to cover the first auxiliary pad 110c in an arc-shaped portion. In use, a patient lies on the scanning bed 200 with the spine of the patient on the first auxiliary pad 110c and the abdomen of the patient corresponding to the second auxiliary pad 110 d.
The first receiving member 130 is used to image the spine of a patient and the second receiving member 140 is used to image the abdomen of a patient. The first auxiliary pad 110c and the second auxiliary pad 110d can be attached to a patient to ensure the comfort during use, and the first auxiliary pad 110c and the second auxiliary pad 110d are further provided with the dielectric part 113 to improve the radio frequency magnetic field and the image imaging quality of the part to be imaged.
Referring to fig. 2 and 3, the present invention further provides a magnetic resonance apparatus including an imaging body having a magnet bore, a scanning table 200, and the scanning assistance structure 100 in any of the above embodiments. The scanning auxiliary structure 100 is disposed on the scanning bed 200 and corresponds to a portion of a patient to be imaged, and the scanning bed 200 can drive the patient to enter and exit the magnet hole.
After the magnetic resonance device of the invention adopts the scanning auxiliary structure 100 of the above embodiment, the fixing of the part to be imaged can be realized, the comfort level of the contact between the part to be imaged and the scanning auxiliary structure 100 can be ensured, and simultaneously, the radio frequency magnetic field can be improved, and the imaging quality can be ensured.
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 invention. 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 (14)
1. A scanning auxiliary pad is characterized in that the scanning auxiliary pad is arranged corresponding to a part to be imaged of a patient; the scan assistant pad includes:
an outer member having a receiving cavity; and
a dielectric member disposed in the receiving cavity to modify a radio frequency magnetic field of the magnetic resonance apparatus.
2. The scanning aid pad of claim 1 further comprising a flexible filler disposed in the receiving cavity for filling the receiving cavity;
the dielectric member is disposed in the accommodation chamber or the flexible filling member.
3. A scanning aid pad according to claim 2 wherein the position of the dielectric element in the flexible filler is adjustable.
4. The scan assist pad of claim 2, wherein the dielectric member comprises a dielectric material filled in the flexible filler.
5. The scan aid pad of claim 4, wherein the dielectric member further comprises a carrier portion for carrying the dielectric material, the carrier portion being disposed in the flexible filler.
6. A scanning aid pad according to claim 4 or claim 5 wherein the amount of dielectric material in the flexible filler is adjustable.
7. A scanning aid pad according to claim 5 wherein said dielectric member is plural in number, the amount of said dielectric material in each of said load bearing portions being the same and/or different;
the bearing parts are arranged at intervals or connected in sequence, and the shapes of the bearing parts are the same and/or different.
8. The scan assist pad of claim 1, wherein the outer member has a mounting opening communicating with the receiving cavity for mounting the dielectric member.
9. A scan assist structure comprising a receive coil and a scan assist pad as claimed in any one of claims 1 to 8, the scan assist pad being disposed at the receive coil;
the number of the scanning auxiliary pads is at least one.
10. The scan assisting structure according to claim 9, wherein the receiving coil is a head coil bottom cover, and the number of the scan assisting pads is plural, and is a head rest pad and at least one head rest plug;
the head support pad is arranged at the bottom of the accommodating space of the head coil bottom cover and is used for bearing the head of the patient; the headrest plug is arranged on the side face of the accommodating space and used for positioning the head of the patient.
11. The scanning assistance structure of claim 9, wherein the number of the receiving coils is two, respectively a first receiving part and a second receiving part, and the number of the scanning assistance pads is plural, respectively a first assistance pad and a second assistance pad;
the first auxiliary pad is arranged on the first receiving part, the second auxiliary pad is arranged on the second receiving part, and the second receiving part and the first receiving part are enclosed to form a bearing space for bearing a part to be imaged.
12. The scan assist structure of claim 11, wherein the scan assist pad further comprises a third assist pad, and the third assist pad is disposed on the first assist pad and/or the second assist pad.
13. The scan assist structure of claim 11, wherein the first receiver is a spine scan receive coil and the second receiver is a body scan receive coil;
the first auxiliary pad is a spine auxiliary pad, and the second auxiliary pad is a body auxiliary pad.
14. A magnetic resonance apparatus comprising an imaging body having a magnet bore, a scan bed, and a scan assist structure as claimed in any one of claims 9 to 13;
the scanning auxiliary structure is arranged on the scanning bed and corresponds to a part of a patient to be imaged, and the scanning bed can drive the patient to enter and exit the magnet hole.
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