CN111198345A - Animal head coil device for magnetic resonance imaging - Google Patents
Animal head coil device for magnetic resonance imaging Download PDFInfo
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- CN111198345A CN111198345A CN201811374329.9A CN201811374329A CN111198345A CN 111198345 A CN111198345 A CN 111198345A CN 201811374329 A CN201811374329 A CN 201811374329A CN 111198345 A CN111198345 A CN 111198345A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- 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
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- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
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Abstract
The application discloses animal head coil device for magnetic resonance imaging, including coil casing and fixed set up in a plurality of coil units of coil casing inside, the coil casing is through adjusting the leg joint on a bed frame, thereby makes the coil casing is in mounting position on the bed frame is adjustable, and be provided with the fixed subassembly of head that is used for fixing the animal head when the imaging inspection on the bed frame. The animal head coil device can conveniently and efficiently carry out imaging examination on the head of an animal and ensure imaging quality.
Description
Technical Field
The present application relates to the field of magnetic resonance imaging, in particular to an animal head coil device for magnetic resonance imaging.
Background
A magnetic resonance system is a high-end medical imaging device in which a radio frequency receive coil is a very important component of the magnetic resonance system. The effect of the radio frequency receive coil in this is comparable to that of the adult eye, with the resulting sharpness of the image being directly proportional to its signal-to-noise ratio (sensitivity). In order to improve the image clarity (or signal-to-noise ratio, or sensitivity), the primary principle of coil design is to make the coil as close as possible to the scanning region or object in order to meet the size of the scanning region or object. For example, a head coil is designed with a size that is primarily such that the head of most patients (e.g., greater than 95% of patients) can fit within the coil, but the size of the head coil should not be too large. Since many patients will not be able to use it if the coil size is too small, which in turn reduces the sharpness of the magnetic resonance image.
The radio frequency receive coils may be named according to the name of the scanning site or subject, and are various. When scanning different parts of the human body, special coils are generally needed, for example, a coil for scanning the head is called a head coil, a coil for scanning the knee joint is called a knee joint coil, and a heart coil, a spine coil and the like are also needed. In addition to human body parts, some coils are also specifically designed for imaging certain animals, and these coils may be referred to as animal coils. The biomedical research with animals as objects can avoid the risks brought by experiments on human bodies, strictly control the experimental conditions of the animals and reduce the influence of individual differences. Imaging modalities, especially magnetic resonance imaging, are one of the indispensable tools in animal model research at present. In order to obtain good image quality, the animal coil is designed by adopting a relatively small coil size, so that the signal-to-noise ratio of the image can be improved as much as possible.
In addition, during the magnetic resonance imaging, the imaging object needs to be kept in a static state as much as possible, otherwise, the image will generate motion artifacts which affect the diagnosis. For animal imaging, it is desirable to anaesthetize the animal, but anaesthesia alone is often insufficient, because during the gradual failure of the anesthetic, the animal may move slightly and the image effect may be adversely affected, so it is still of interest to take further physical fixation of the animal.
Disclosure of Invention
The purpose of this application is: an animal head coil device for magnetic resonance imaging is provided, which can carry out imaging examination on the head of an animal conveniently and efficiently and ensure the examination quality.
In order to achieve the purpose, the technical scheme of the application is as follows:
an animal head coil apparatus for magnetic resonance imaging, comprising:
coil housing, and
the coil units are fixedly arranged in the coil shell;
the coil shell is connected to a base frame through an adjusting bracket, so that the installation position of the coil shell on the base frame is adjustable, and a head fixing assembly for fixing the head of an animal during imaging examination is arranged on the base frame.
On the basis of the technical scheme, the application also comprises the following preferable scheme:
the adjusting bracket is a three-dimensional adjusting bracket, so that the installation position of the coil shell on the base frame can be adjusted in three dimensions.
The adjusting bracket includes:
the X-direction guide rods are provided with two X-direction guide rods which are fixed on the base frame in parallel, and the length of each X-direction guide rod extends horizontally along the X-axis direction;
the X-direction sliding sleeves are arranged and are respectively sleeved on the two X-direction guide rods in a sliding manner;
the length of the Y-direction guide rod horizontally extends along the Y-axis direction, and two ends of the Y-direction guide rod are respectively fixed with the two X-direction sliding sleeves;
the Y-direction sliding sleeve is sleeved on the Y-direction guide rod in a sliding manner, and a Z-direction sliding hole which is vertically communicated with the Y-direction sliding sleeve and a first threaded hole which is vertically communicated with the Z-direction sliding hole are formed in the Y-direction sliding sleeve;
the length of the Z-direction sliding rod vertically extends along the Z-axis direction, the Z-direction sliding rod is slidably arranged in the Z-direction sliding hole of the Y-direction sliding sleeve in a penetrating manner, and the Z-direction sliding rod is fixedly connected with the Y-direction sliding sleeve by virtue of a sliding rod locking screw which is locked in the first threaded hole and extends into the Z-direction sliding hole;
the coil shell is connected to the lower end of the Z-direction sliding rod.
The coil shell is connected with the lower end of the Z-direction sliding rod through a ball hinge joint.
The Y-direction guide rod is vertically penetrated with a first strip hole extending along the Y-axis direction, and the Z-direction slide rod is movably arranged in the first strip hole in a penetrating mode.
The head fixing assembly comprises a vertical frame III connected to the base frame, and an oral positioning insertion plate which extends rightwards along the X-axis direction and is used for being inserted into an animal oral cavity is connected to the vertical frame III.
The base frame is provided with a sliding groove extending horizontally along the X-axis direction, a bottom plate extending horizontally along the X-axis direction is integrally arranged at the bottom of the vertical frame III, the bottom plate is embedded in the sliding groove in a sliding mode, a second threaded hole extending vertically downwards is formed in the bottom wall of the sliding groove, a second strip hole extending horizontally along the X-axis direction is vertically communicated with the bottom plate, and the vertical frame III is connected with the sliding groove through a locking screw penetrating through the second strip hole and a locking screw of the vertical frame III in the second threaded hole.
The vertical frame III is horizontally provided with a third strip hole extending along the Z-axis direction in a penetrating mode, the opening part positioning insertion plate is provided with a third threaded hole extending horizontally, and the opening part positioning insertion plate is connected with the vertical frame III through insertion plate locking screws penetrating through the third strip hole and the third threaded hole.
The head fixing assembly further comprises two vertical frames I which are connected to the base frame and are arranged on the left side and the right side in the Y-axis direction in a spaced mode, and ear positioning insertion rods used for being inserted into ear holes of animals are connected to the vertical frames I.
A plurality of jacks are arranged in the stand I along the Y-axis direction in a penetrating mode, the jacks are arranged on the stand I along the Z-axis direction at intervals, the ear positioning insertion rod is movably inserted in the jacks along the Y-axis direction, a fourth threaded hole in the jack is formed in the surface of the stand I and extends inwards, and the ear positioning insertion rod is connected with the stand I through the insertion rod locking screw in the fourth threaded hole in a penetrating mode.
Coil shell has one to give way the perforation respectively in the left and right sides of Y axle direction, ear location inserted bar passes give way the perforation and stretch into inside the casing, and at least one the coil unit encircle set up in it is peripheral to give way the perforation.
The head fixing assembly further comprises two vertical frames II which are connected to the base frame and are arranged on the left side and the right side in the Y-axis direction in a spaced mode, the vertical frames II and the vertical frames I are arranged on the front side and the back side in the X-axis direction in a spaced mode, the vertical frames III are arranged between the two vertical frames II, and the vertical frames II are connected with eye positioning pressing plates used for pressing animal eye orbits.
The top of the vertical frame II is integrally provided with a supporting arm extending backwards along the X-axis direction in a horizontal mode, a fourth strip-shaped hole extending along the X-axis direction is vertically formed in the supporting arm in a penetrating mode, a fourth threaded hole extending vertically is formed in the eye positioning pressing plate, and the eye positioning pressing plate is connected with the vertical frame II through a pressing plate locking screw penetrating through the fourth strip-shaped hole and the fourth threaded hole.
The application has the advantages that:
1. this kind of animal head coil device of this application is when practical application, and the fixed subassembly of head on the usable bed frame is fixed the animal head in advance to prevent that animal head activity influences the imaging quality when the formation of image inspection. Then the position of the coil shell is adjusted through the movable adjusting bracket according to the position of the head of the animal, and the coil shell is accurately configured on the head of the animal for imaging examination, so that the use is convenient, and the examination efficiency is high.
2. Coil casing that inside has coil unit can follow X, Y, X three directions and arbitrary translation in the space under the help of adjusting the support, and coil casing is connected through the ball hinged joint with adjusting the support simultaneously, makes the angle of coil casing adjust wantonly again, so make it can accurately wear to the animal head of equidimension not, different shapes, application scope is wide.
3. The head fixing component arranged on the base comprises an eye positioning pressing plate, an ear positioning inserting rod and an oral positioning inserting plate which are respectively used for positioning the positions of eyes, ears and the oral of an animal, and the structure is simple and ingenious.
4. The positions of the eye positioning pressing plate, the ear positioning inserted bar and the mouth positioning inserted plate of the head fixing component can be adjusted, so that the head fixing component can fix animal heads with different sizes and shapes.
Drawings
Fig. 1 is a schematic view of the overall structure of an animal head coil device according to an embodiment of the present application;
fig. 2 is a schematic structural view of the animal head coil device according to the embodiment of the present application after the head fixing assembly is removed;
fig. 3 is a schematic structural view of the animal head coil device according to the embodiment of the present application after the coil housing and the adjusting bracket are removed;
wherein: 1-coil shell, 101-ball socket shell, 102-abdicating perforation, 2-base frame, 3-X direction guide rod, 4-X direction sliding sleeve, 5-Y direction guide rod, 501-first strip hole, 6-Y direction sliding sleeve, 7-Z direction sliding rod, 701-ball head, 8-joint locking screw, 9-vertical frame II, 901-fourth strip hole, 10-vertical frame I, 1001-jack, 11-eye positioning pressure plate, 12-sliding rod locking screw, 13-ear positioning inserted rod, 14-vertical frame III, 1401-second strip hole, 1402-third strip hole and 15-mouth positioning inserted plate.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.
One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.
Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
Fig. 1 to 3 show a preferred embodiment of the animal head coil device for magnetic resonance imaging according to the present application, which includes a coil housing 1 and a plurality of coil units fixedly arranged inside the coil housing, wherein the coil housing 1 is a structure which is adapted to the shape of the animal head and is approximately hat-shaped.
The key improvement of this embodiment is that the coil housing 1 is connected to a base frame 2 by means of an adjusting bracket, which has an adjustable property, so that the mounting position of the coil housing 1 on the base frame 2 can be adjusted. And the base frame 2 is provided with a head fixing component for fixing the head of the animal during imaging examination and preventing the head of the animal from moving.
Further, the adjusting bracket is a three-dimensional adjusting bracket, so that the installation position of the coil housing on the base frame is three-dimensionally adjustable, and the term "three-dimensionally adjustable" means that the installation position of the coil housing 1 is adjustable in the X-axis direction, the Y-axis direction, and the Z-axis direction.
In the present embodiment, the adjusting bracket mainly includes an X-directional guide rod 3, an X-directional sliding sleeve 4, a Y-directional guide rod 5, a Y-directional sliding sleeve 6, and a Z-directional sliding rod 7. Wherein:
the total number of the X-guide bars 3 is two, the two X-guide bars 3 are fixed to the top of the base frame 2 in parallel with each other, and the length of the X-guide bar 3 extends horizontally in the X-axis direction.
The two X-direction sliding sleeves 4 are also arranged, and the two X-direction sliding sleeves 4 are respectively sleeved on the two X-direction guide rods 3 in a sliding manner.
The length of the Y-direction guide rod 5 horizontally extends along the Y-axis direction, and two ends of the Y-direction guide rod 5 are respectively and fixedly connected with the two X-direction sliding sleeves 4.
The Y-direction sliding sleeve 6 is slidably sleeved on the Y-direction guide rod 5, a Z-direction sliding hole which is vertically penetrated is formed in the Y-direction sliding sleeve 6, and a first threaded hole which is vertically communicated with the Z-direction sliding hole is also formed in the Y-direction sliding sleeve 6.
The length of the Z-direction sliding rod 7 vertically extends along the Z-axis direction, and the Z-direction sliding rod 7 is slidably arranged in a Z-direction sliding hole of the Y-direction sliding sleeve 6. The Z-direction slide rod 7 and the Y-direction slide sleeve 6 are tightly connected by a slide rod locking screw 12 which is locked into the first threaded hole and extends into the Z-direction slide hole. When the slide bar locking screw 12 is locked inwards, the inner side end of the slide bar locking screw 12 abuts against the Z-direction slide bar 7, so that the Z-direction slide bar 7 and the Y-direction sliding sleeve 6 are fixed with each other; when the slide bar locking screw 12 is loosened to withdraw it outward, the Z-direction slide bar 7 is not pressed by the slide bar locking screw 12 any more, and thus can move freely up and down along the Z-direction slide hole to adjust the height of the Z-direction slide bar 7.
The coil housing 1 is specifically connected to the lower end of the Z-slide 7.
In practical application, the treated animal is anesthetized, and then the head of the animal is fixed by the head fixing component on the pedestal 2, so that the head of the animal is prevented from moving to influence the imaging quality during imaging examination. The position of the coil housing 1 is then adjusted according to the position of the animal's head to accurately cover the coil housing 1 on the animal's head. Specifically, the method comprises the following steps: the X-axis position of the coil shell 1 is adjusted by moving the X-direction sliding sleeve 4 back and forth along the X-direction guide rod 3, the Y-axis position of the coil shell 1 is adjusted by moving the Y-direction sliding sleeve 6 left and right along the Y-direction guide rod 5, and the Z-axis position of the coil shell 1 is adjusted by moving the Z-direction sliding rod 7 up and down along the Z-direction sliding hole of the Y-direction sliding sleeve 6.
Because the position of the coil housing 1 on the pedestal 2 can be adjusted in X, Y, Z three directions, the coil housing 1 can be perfectly worn on the head of the animal regardless of the walking and the size of the head after the head of the animal is positioned on the pedestal 2, so that high-quality magnetic resonance imaging can be completed.
In order to adjust the three-dimensional translational position of the coil housing 1, the coil housing 1 can be turned over to adjust the wearing angle thereof, in this embodiment, the coil housing 1 is not directly and rigidly connected to the lower end of the Z-direction sliding rod 7, but the coil housing 1 is connected to the lower end of the Z-direction sliding rod 7 through a ball joint.
The above-mentioned ball joint includes:
a ball housing 101 (housing with a ball inside) fixed to the top of the coil housing 1,
a ball head 701 fixed to the lower end of the Z-direction slide bar 7 and movably arranged in the ball socket housing 101, an
A joint locking screw 8 attached to the ball housing 101 for fixing/releasing the ball head 701 and the ball housing 101.
In practical application, the joint locking screw 8 is loosened, the angle of the coil housing 1 is adjusted, and then the joint locking screw 8 is tightened, so that the installation angle of the coil housing 1 on the Z-direction slide rod 7 is locked.
In order to prevent the X-direction position and the Y-direction position of the coil housing 1 from being loosened after the position of the coil housing 1 is adjusted, the X-direction sliding bush 4 is provided with a locking screw for fastening the X-direction sliding bush to the X-direction guide rod 3, and the Y-direction sliding bush 6 is also provided with a locking screw for fastening the Y-direction sliding bush to the X-direction guide rod 5. When the position of the coil shell 1 needs to be adjusted, the locking screws are loosened and adjusted to be fastened.
The Y-direction guide rod 5 is vertically provided with a first long hole 501 extending along the Y-axis direction in a penetrating manner, and the Z-direction slide rod 7 is movably arranged in the first long hole 501 in a penetrating manner.
The head fixing assembly comprises two vertical frames II 9 and two vertical frames I10 which are connected to the base frame 2. The two vertical stands II 9 are arranged at left and right intervals along the Y-axis direction, the two vertical stands I10 are arranged at left and right intervals along the Y-axis direction, and the vertical stands II 9 and the vertical stands I10 are arranged at front and back intervals along the X-axis direction. And a vertical frame III 14 connected with the base frame 2 is further arranged between the two vertical frames II 9, the position X of the vertical frame III 14 on the base frame 2 is adjustable, namely the vertical frame III 14 translates on the base frame 2 along the X direction. An oral positioning inserting plate 15 which extends backwards along the X-axis direction and is used for being inserted into the oral cavity of the animal to fix the oral position of the animal is connected to the stand III 14. The stand II 9 is connected with an eye positioning pressing plate 11 which is used for pressing the positions of the animal eye bones to fix the positions of the animal eyes, and the stand I10 is connected with an ear positioning inserted link 13 which is used for being inserted into the animal ear holes to fix the positions of the animal ears.
For convenience of explanation of the technical solution of the present application, the stand ii 9 and the stand i 10 may be referred to as a front stand and a rear stand, respectively.
The concrete connection mode of the vertical frame III 14 and the base frame 2 is as follows: be provided with the spout that extends along X axle direction level on the bed frame 2, grudging post III 14 bottom an organic whole is provided with the bottom plate that extends along X axle direction level, and aforementioned bottom plate slides and inlays to locate in the spout to vertical downwardly extending's second screw hole is seted up to the diapire of spout, and vertical link up on the bottom plate is seted up along X axle direction level extension's second rectangular hole 1401, and grudging post III 14 is connected with the spout with the help of the grudging post III locking screw of wearing to locate in second rectangular hole 1401 and the second screw hole. The X-direction position (X-direction coordinate) of the vertical frame III 14 on the base frame 2 can be adjusted by loosening the locking screw of the vertical frame III; and tightening the locking screw of the vertical frame III to fasten the vertical frame III 14 and the base frame 2.
The sliding groove is specifically arranged between the two vertical frames II 9 and is connected with the two vertical frames II 9 into a whole. The mounting positions of the two stands ii 9 on the base frame 2 can also be adjusted along the X-axis direction, and the specific addresses are as follows: the stand II 9 is also provided with an X-direction long hole and is connected with the base frame 2 through a bolt penetrating through the long hole, so that the installation position of the stand II 9 can be adjusted in the X-axis direction, and the method can be seen in figure 3.
Of course, stand II 9 may be completely fixed to base frame 2 for ease of assembly.
It can be understood that, because the mouth positioning insertion plate 15 is connected to the vertical frame iii 14, and the X-direction coordinate of the vertical frame iii 14 on the base frame 2 is adjustable, the X-direction position of the mouth positioning insertion plate 15 on the base frame 2 is also adjustable. Therefore, the mouth positioning insertion plate 15 can be correspondingly adjusted according to the position of the mouth of the animal to be imaged, so that the mouth positioning insertion plate accurately extends into the mouth of the animal.
Of course, in order to reduce the manufacturing cost of the device and simplify the device structure, the stand iii 14 may be directly fixed to the base frame 2 so that the position thereof in the X direction is not adjustable.
As already described above, the mouth positioning insert 15 is adjustable in position so that it can accurately fix the position of the animal's mouth. If the positions of the eye positioning pressing plate 11 and the ear positioning insertion rod 13 on the base frame 2 are fixed and not adjustable, when the device is used for imaging the heads of animals with different sizes and different categories, the eye positioning pressing plate 11 and the ear positioning insertion rod 13 cannot be fully used for fixing the positions of eyes and ears. In this regard, the present embodiment is specially designed to have a special structure so that the positions of the eye positioning pressing plate 11 and the ear positioning insertion rod 13 on the base frame 2 can be adjusted as follows:
the top of the stand II 9 is integrally provided with a supporting arm extending horizontally backwards along the X-axis direction, and the supporting arm is vertically provided with a fourth strip-shaped hole 901 extending along the X-axis direction in a penetrating manner. A fourth threaded hole which extends vertically is formed in the eye positioning pressing plate 11, and the eye positioning pressing plate 11 is connected with the stand II 9 through a pressing plate locking screw which penetrates through the fourth strip hole 901 and the fourth threaded hole. It will be understood that the eye positioning pressing plate 11 can adjust the X-direction position by moving the pressing plate locking screw in the fourth elongated hole 901, and can also adjust the installation angle around the pressing plate locking screw.
The vertical frame i 10 is provided with a plurality of (two in the drawing) insertion holes 1001 penetrating in the Y-axis direction, and the insertion holes are arranged at intervals in the vertical frame i 10 in the Z-axis direction. The ear positioning insertion rod 13 is movably inserted into the insertion hole 1001 along the Y-axis direction. A fourth threaded hole extending inwards into the insertion hole 1001 is formed in the surface of the vertical frame I10, and the ear positioning insertion rod 13 is connected with the vertical frame I10 through an insertion rod locking screw penetrating through the fourth threaded hole. It will be understood that the ear positioning rod 13 can be inserted into the corresponding insertion hole 1001 according to the height of the animal's ear, and can be horizontally moved along the insertion hole 1001 to change the insertion depth into the animal's ear hole. After adjustment, the ear positioning insertion rod 13 is fastened with the stand I10 by tightening the insertion rod locking screw, so that the ear positioning insertion rod 13 is prevented from loosening.
Further, a plurality of (five in this embodiment, as shown in fig. 3) fourth threaded holes are provided on the eye positioning pressure plate 11, so that the pressure plate locking screw can be selectively locked into different fourth threaded holes as required, which is more beneficial to matching the eye positioning pressure plate 11 with the position of the animal oral cavity.
In practical application, an animal (such as a monkey) can be anesthetized, then the animal is moved to the base frame 2, the head of the animal is positioned at the position of the head fixing component, the positions of the oral positioning insertion plate 15, the eye positioning pressing plate 11 and the ear positioning insertion rod 13 are adjusted according to the size and the shape of the head of the animal, the oral positioning insertion plate 15 extends into the oral cavity of the animal, the eye positioning pressing plate 11 is pressed at the eye orbit bone of the animal, and the ear positioning insertion rod 13 extends into the ear holes of the left ear and the right ear of the animal (certainly, the animal cannot be inserted too deeply). The head of the animal to be imaged is fixed by supporting the mouth, eyes and ears of the animal, so that the head of the animal is prevented from moving during imaging examination. Specifically, the X-direction position of the mouth positioning insertion plate 15 is changed by adjusting the X-direction coordinate of the vertical frame III 14 on the base frame 2; the X-direction position of the ear positioning pressing plate 11 is changed by adjusting the X-direction coordinate of the pressing plate locking screw in the fourth strip hole 901, and meanwhile, the installation angle of the ear positioning pressing plate 11 can be changed by rotating around the pressing plate locking screw; the height of the ear positioning insertion rod 13 can be adjusted by selecting different insertion holes 1001, and the insertion depth of the ear positioning insertion rod 13 can be adjusted by horizontally moving the ear positioning insertion rod in the insertion holes 1001.
Since the vertical frame iii 14 can adjust only the position in the X direction, the mouth positioning insert plate 15 connected to the vertical frame iii 14 can move only in the X axis direction according to the vertical frame iii 14. While different animals have different distances between their mouth and their lower jaw (i.e. different heights of the mouth when the head of the animal is at the position of the base frame 2), if the height of the mouth positioning insert 15 is not adjustable, it will not be inserted into the mouth of the animal with a higher or lower mouth. Therefore, in this embodiment, a third elongated hole 1402 extending along the Z-axis direction is horizontally formed through the vertical frame iii 14, a third threaded hole extending horizontally is formed in the mouth positioning insertion plate 15, and the mouth positioning insertion plate 15 and the vertical frame iii 14 are connected by an insertion plate locking screw inserted into the third elongated hole 1402 and the third threaded hole. This allows the mounting position of the mouth portion positioning insert plate 15 to be adjusted up and down along the third elongated hole 1402.
It is known that, in general, if it is desired to obtain more and more accurate image information of an imaged part, a sufficient number of coil units are arranged near the imaged part
Because the ear positioning insertion rod 13 needs to extend into the head accommodating cavity of the coil housing 1 in practical application, the coil housing 1 cannot necessarily block the movement of the ear positioning insertion rod 13. If make it wear when the animal head through the vertical dimension that reduces coil housing 1, whole coil housing is whole in the mode of animal ear top, avoids coil housing 1 to block the insertion of ear location inserted bar 13 to the earhole, then inevitably leads to near animal ear not have coil unit when the formation of image inspection, also can't acquire the image of animal ear yet, also can be unfavorable for the integrality and the definition of the head image that obtain because of coil unit's coverage is less simultaneously. Therefore, the embodiment does not adopt the scheme of reducing the vertical size of the coil housing 1, and the left side and the right side (two sides in the Y-axis direction) of the coil housing 1 are respectively formed with the abdicating through hole 102, the abdicating through hole 102 provides abdicating for the insertion of the ear positioning insertion rod 13, so that the ear positioning insertion rod 13 can penetrate the abdicating through hole 102 and extend into the head accommodating cavity of the housing in actual use, and at least one coil unit is arranged around the periphery of the abdicating through hole 102, thereby increasing the coverage of the coil unit and being more beneficial to acquiring more complete and clear animal head images.
The core components of the head fixing assembly are the mouth positioning insertion plate 15, the ear positioning insertion rod 13 and the eye positioning pressing plate 11. After the ear and mouth positions of the animal are fixed by the ear positioning inserting rod 13 and the mouth positioning inserting plate 15, the head of the animal can be ensured not to move basically during imaging examination, and the eye positioning pressing plate 11 plays a role in reinforcing the fixation of the head of the animal.
In practical application, firstly, the treated animal is anesthetized, then the animal is generally fixed by the mouth positioning insertion plate 15, then the coil shell is moved to the position near the head of the monkey, the ear positioning insertion rod 13 is inserted into an ear cavity and fixed, then the eye positioning pressing plate 11 is adjusted to be pressed at the eye orbit bone of the animal, and finally the position of the coil shell 1 is finely adjusted and fixed according to the final position of the head of the animal.
Obviously, the surfaces of the mouth positioning insert 15, ear positioning insert 13 and eye positioning pressure plate 11 described above should be smooth and burr-free to avoid scratching the animal's skin during use.
The foregoing is a more detailed description of the present application in connection with specific embodiments thereof, and it is not intended that the present application be limited to the specific embodiments thereof. It will be apparent to those skilled in the art from this disclosure that many more simple derivations or substitutions can be made without departing from the spirit of the disclosure.
Claims (13)
1. An animal head coil apparatus for magnetic resonance imaging, comprising:
coil housing (1), and
the coil units are fixedly arranged in the coil shell;
the coil housing (1) is connected to a base frame (2) through an adjusting bracket, so that the mounting position of the coil housing (1) on the base frame (2) is adjustable, and a head fixing component for fixing the head of an animal during imaging examination is arranged on the base frame (2).
2. Animal head coil arrangement for magnetic resonance imaging according to claim 1, characterized in that the adjustment support is a three-dimensional adjustment support, so that the mounting position of the coil housing (1) on the base frame (2) is three-dimensionally adjustable.
3. The animal head coil apparatus for magnetic resonance imaging according to claim 2, wherein the adjustment bracket includes:
the X-direction guide rods (3) are arranged, the two X-direction guide rods (3) are fixed on the base frame (2) in parallel, and the length of each X-direction guide rod (3) horizontally extends along the X-axis direction;
the X-direction sliding sleeves (4) are arranged, and the two X-direction sliding sleeves (4) are respectively sleeved on the two X-direction guide rods (3) in a sliding manner;
the length of the Y-direction guide rod (5) horizontally extends along the Y-axis direction, and two ends of the Y-direction guide rod (5) are respectively fixed with the two X-direction sliding sleeves (4);
the Y-direction sliding sleeve (6) is sleeved on the Y-direction guide rod (5) in a sliding manner, and a Z-direction sliding hole which is vertically communicated and a first threaded hole which is vertically communicated with the Z-direction sliding hole are formed in the Y-direction sliding sleeve (6);
the length of the Z-direction sliding rod (7) vertically extends along the Z-axis direction, the Z-direction sliding rod (7) is slidably arranged in the Z-direction sliding hole of the Y-direction sliding sleeve (6), and the Z-direction sliding rod (7) is fixedly connected with the Y-direction sliding sleeve (6) through a sliding rod locking screw (12) which is locked in the first threaded hole and extends into the Z-direction sliding hole;
the coil shell (1) is connected to the lower end of the Z-direction sliding rod (7).
4. Animal head coil arrangement for magnetic resonance imaging according to claim 3, characterized in that the coil housing (1) and the lower end of the Z-slide (7) are connected by a ball joint.
5. The animal head coil device for magnetic resonance imaging according to claim 3, wherein the Y-direction guide rod (5) is vertically provided with a first long hole (501) extending along the Y-axis direction, and the Z-direction slide bar (7) is movably arranged in the first long hole (501).
6. An animal head coil arrangement for magnetic resonance imaging according to claim 1, wherein the head fixation assembly comprises a stand iii (14) connected to the base frame (2), the stand iii (14) having attached thereto a mouth positioning insert (15) extending to the right in the X-axis direction for insertion into the mouth of the animal.
7. The animal head coil device for magnetic resonance imaging according to claim 6, wherein the base frame (2) is provided with a sliding groove horizontally extending along the X-axis direction, the bottom of the stand iii (14) is integrally provided with a bottom plate horizontally extending along the X-axis direction, the bottom plate is slidably embedded in the sliding groove, a second threaded hole vertically extending downwards is formed in the bottom wall of the sliding groove, a second elongated hole (1401) horizontally extending along the X-axis direction is vertically formed in the bottom plate in a penetrating manner, and the stand iii (14) and the sliding groove are connected by means of a stand iii locking screw penetrating through the second elongated hole (1401) and the second threaded hole.
8. The animal head coil device for magnetic resonance imaging according to claim 7, wherein a third elongated hole (1402) extending along the Z-axis direction is horizontally formed through the vertical frame iii (14), a third threaded hole extending horizontally is formed in the mouth positioning insertion plate (15), and the mouth positioning insertion plate (15) and the vertical frame iii (14) are connected by an insertion plate locking screw inserted into the third elongated hole (1402) and the third threaded hole.
9. The animal head coil device for magnetic resonance imaging according to claim 7, wherein the head fixing assembly further comprises two vertical stands I (10) connected to the base frame (2) and arranged at left and right intervals along the Y-axis direction, and ear positioning insertion rods (13) for inserting into ear holes of animals are connected to the vertical stands I (10).
10. The animal head coil device for magnetic resonance imaging according to claim 9, wherein the stand i (10) has a plurality of through holes along the Y-axis direction, and the through holes are arranged on the stand i (10) at intervals along the Z-axis direction, the ear positioning insertion rod (13) is movably inserted into the insertion hole (1001) along the Y-axis direction, a fourth threaded hole extending inward into the insertion hole (1001) is formed in the surface of the stand i (10), and the ear positioning insertion rod (13) is connected with the stand i (10) by means of an insertion rod locking screw inserted into the fourth threaded hole.
11. The animal head coil device for magnetic resonance imaging according to claim 9, wherein the coil housing (1) is formed with a yielding through hole (102) on each of the left and right sides of the Y-axis direction, the ear positioning insertion rod (13) passes through the yielding through hole (102) and extends into the head accommodating cavity of the housing, and at least one of the coil units is disposed around the yielding through hole (102).
12. The animal head coil device for magnetic resonance imaging according to claim 9, wherein the head fixing assembly further comprises two vertical stands ii (9) connected to the base frame (2) and arranged at left and right intervals along the Y-axis direction, the vertical stands ii (9) and the vertical stand i (10) are arranged at front and back intervals along the X-axis direction, the vertical stand iii (14) is arranged between the two vertical stands ii (9), and an eye positioning pressing plate (11) for pressing the animal eye orbit bone is connected to the vertical stand ii (9).
13. The animal head coil device for magnetic resonance imaging according to claim 12, wherein a supporting arm extending horizontally and backwardly along the X-axis direction is integrally arranged at the top of the vertical frame ii (9), a fourth elongated hole (901) extending along the X-axis direction is vertically formed in the supporting arm in a penetrating manner, a fourth threaded hole extending vertically is formed in the eye positioning pressing plate (11), and the eye positioning pressing plate (11) and the vertical frame ii (9) are connected by means of a pressing plate locking screw penetrating through the fourth elongated hole (901) and the fourth threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811374329.9A CN111198345A (en) | 2018-11-19 | 2018-11-19 | Animal head coil device for magnetic resonance imaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811374329.9A CN111198345A (en) | 2018-11-19 | 2018-11-19 | Animal head coil device for magnetic resonance imaging |
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| Publication Number | Publication Date |
|---|---|
| CN111198345A true CN111198345A (en) | 2020-05-26 |
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ID=70744114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811374329.9A Pending CN111198345A (en) | 2018-11-19 | 2018-11-19 | Animal head coil device for magnetic resonance imaging |
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| Country | Link |
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| CN (1) | CN111198345A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115363563A (en) * | 2022-08-17 | 2022-11-22 | 浙江大学 | Optimized positioning device suitable for head nuclear magnetic resonance imaging |
-
2018
- 2018-11-19 CN CN201811374329.9A patent/CN111198345A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115363563A (en) * | 2022-08-17 | 2022-11-22 | 浙江大学 | Optimized positioning device suitable for head nuclear magnetic resonance imaging |
| CN115363563B (en) * | 2022-08-17 | 2023-11-28 | 浙江大学 | Optimized positioning device suitable for head nuclear magnetic resonance imaging |
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