CN207457479U - A kind of coil device for the imaging of horizontal magnetic resonance hand - Google Patents
A kind of coil device for the imaging of horizontal magnetic resonance hand Download PDFInfo
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- CN207457479U CN207457479U CN201721276822.8U CN201721276822U CN207457479U CN 207457479 U CN207457479 U CN 207457479U CN 201721276822 U CN201721276822 U CN 201721276822U CN 207457479 U CN207457479 U CN 207457479U
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Abstract
This application discloses it is a kind of for horizontal magnetic resonance hand imaging coil device, including：For generating the B0 field generators of main field (B0) field, coil case and the hand coil in the coil case；It further includes for for the lying bed lain on the back by imaging person, the coil case is arranged in the top of the lying bed, and be formed in the coil case it is horizontal-extending, put hand hole for what is stretched by imaging person's hand, the axis for putting hand hole is vertical with the B0 field directions that the B0 field generators generate, and the hand coil, which is surround, is arranged in the periphery for putting hand hole.The comfort of those who are investigated when the application improves imaging inspection, and optimize the signal-to-noise ratio and imaging effect of coil.
Description
Technical field
This application involves magnetic resonance imaging arts, and in particular to a kind of coil dress for the imaging of horizontal magnetic resonance hand
It puts.
Background technology
Magnetic resonance system is a kind of medical imaging devices, and wherein radio frequency (RF, Radio Frequency) receiving coil is magnetic
One very important component of resonator system.The effect of RF receiving coil wherein can liken the eyes of adult, image
Final clarity it is directly proportional directly with its signal-to-noise ratio (sensitivity).In order to improve the clarity of image (or signal-to-noise ratio or spirit
Sensitivity), the primary starting point of general coil design is to determine the shape of coil and interior chamber size, and size can neither less can not
It is too small.Because if coil dimension is too greatly, the clarity of magnetic resonance image can be reduced；And it is too small if, may have quite
Patient's privileged site of ratio can not be placed into coil inside.So the First Principles of coil design be meet scanned position or
In the case of the size of object, by being sized for as far as possible close to scanned position or object for coil.Such as head coil
Design, the head that its size can meet most patients (such as more than 95% patient) can be put into coil.
Therefore, RF receiving coil can be varied according to scanned position or the name nominating of object.In scanning human body not
When with position, best image effect could be obtained with dedicated coil by generally requiring, for example the coil of scanning head claims
It is known as knee joint coil for head coil, the kneed coil of scanning, the coil for scanning hand is known as hand coil or wrist line
Circle.Magnetic resonance imaging helps significantly to promote the performance of clinical image using coils special.
After the inner cavity size and shape of coil is determined, the factors such as the distribution trend of coil unit, shape, quantity are also straight
Connect the performance quality for affecting magnetic resonance image.Here the First Principles of unit trend are simply introduced first：Unit copper sheet
The normal to a surface formed after closure should be vertical as far as possible with the direction of magnet B0.When vertical, unit acceptance
Can be best；If parallel, then signal is not received；If between hang down it is perpendicular and parallel between, received signal also will
It falls between.In addition one is introduced again is relatively easily designed the characteristics of personnel ignore：Two identical units, normal side
To all perpendicular to B0 field directions, but a unit is surface cell (surface coil units), another be center ring around line
Coil unit, then center ring to be significantly stronger than surface coil units around the receiving ability of unit.
In addition, magnetic resonance image performance is closely bound up with the uniformity of magnetic field B0 and radio-frequency transmissions field B1, B0 and B1
More uniform, image effect is better, and in magnet center, B0 and B1 are most uniform, and away from center, field uniformity is got over
Difference.Therefore whether scanned position is located at the immediate vicinity of magnet or away from magnet center, also to magnetic resonance clinical image performance
Have a great impact.
Specific to horizontal magnetic resonance hand coil, the mentality of designing of industry prevalence has following 2 features at present：
1st, because the finiteness of magnetic resonance magnet intracavity space, patient is usually prostrate (or part is to lie on the back) in sick bed
On, hand is lifted over the top of the head, it so can be by hand placement in magnet center neighbouring position.The trend of hand is with human body at this time
Head foot direction is consistent, and it with the trend of magnet hole is parallel that this, which also determines that the trend of the inner cavity hole of hand line circle is,.
2nd, several surface coil units are designed around the inner cavity of hand coil, to ensure each coil unit as far as possible
Normal direction be vertical with magnet direction.
With reference to previously described content, the advantage and disadvantage of this popular design at present are analyzed：
Advantage mainly has：
1st, hand imaging when, can be placed near magnet center, and center be B0 with B1 most uniformly
Side, contributes to the optimization of imaging effect.
2nd, coil unit design is simple ripe
Shortcoming mainly has：
1st, when patient is imaged, the posture taken is mainly that prostrate was raised one's hand the posture on the crown, to body situation not
For good people, and it is uncomfortable, and the particularly magnetic resonance imaging time is relatively long.
2nd, the unit design of coil can only use surface coils, and cannot use the coil unit of circulating type, because at this time
The normal direction of circulating type unit can not play the role of obtaining signal parallel to B0 field directions.Therefore imaging effect is not
Amplitude peak is promoted.
The content of the invention
The purpose of the application is：A kind of coil device for the imaging of horizontal magnetic resonance hand is proposed, to improve imaging
The comfort of those who are investigated during inspection, and optimize the signal-to-noise ratio and imaging effect of coil.
In order to achieve the above object, the technical solution of the application is：
A kind of coil device for the imaging of horizontal magnetic resonance hand, including：
For generating the B0 field generators of B0,
Coil case and
Hand coil in the coil case；
It further includes for for the lying bed lain on the back by imaging person, the coil case to be arranged in the top of the lying bed, and
Be formed in the coil case it is horizontal-extending, put hand hole for what is stretched by imaging person's hand, the axis for putting hand hole with
The B0 field directions that the B0 field generators generate are vertical, and the hand coil, which is surround, is arranged in the periphery for putting hand hole.
The application based on the above technical solutions, further includes following preferred embodiment：
The hand coil includes being looped around at least one coil unit I for putting hand hole periphery.
There are two the coil unit I is set altogether, the parallel portion being mutually parallel is collectively formed in two coil units I
And the cross section in X-shaped arranged crosswise, the parallel portion and the cross section integrally connected and form a closure
Loop configuration.
The hand coil is further included puts several coil units II that hand hole is sequentially arranged around described.
The normal of each coil unit II is each perpendicular to the hand hole axis of putting and arranges.
Two II arrangements intersected with each other of coil unit of arbitrary neighborhood.
The coil unit II is provided with seven altogether.
The B0 field generators include the lying bed accepting hole stretched into for the lying bed, and the lying bed passes through straight-line displacement guide rail
It is flexibly connected with the B0 field generators, and the lying bed is enabled to be moved in and out the lying bed accepting hole.
The coil case is by supporting rack position to be adjustably supported in the top of the lying bed.
The advantage of the application is：
1st, the coil case of hand coil is set the top of lying bed by the application, and in coil case to put hand hole vertical
In B0 field directions, in imaging inspection, the hand of those who are investigated lies in above neck and stretches into the putting in hand hole of coil case,
Those who are investigated are in very comfortable posture.Moreover, being arranged in the periphery for putting hand hole because hand coil is surround, and put the hole of hand hole
Axis again it is perpendicular with B0 field directions, then the normal of hand coil entirety also just perpendicular to or substantially perpendicular to B0 field directions, therefore
And hand coil received signal is stronger, the image of acquisition is relatively sharp.
2nd, hand coil includes being looped around the coil unit I (center wound coil unit) of putting hand hole periphery and around putting
Multiple coil units II (surface coil units) that hand hole is sequentially arranged, with extraordinary imaging definition.
3rd, B0 field generators include the lying bed accepting hole stretched into for the lying bed, and lying bed passes through straight-line displacement guide rail and B0
Generator is flexibly connected, and the lying bed is enabled to be moved in and out lying bed accepting hole by straight-line displacement guide rail.Imaging inspection
When, first will lying bed all remove lying bed accepting holes outside, treat those who are investigated lie supine upon lying bed and hand is stretched into put hand hole and then
Lying bed is moved into lying bed accepting hole, it is very convenient, and ensure that imaging definition.
Description of the drawings
Fig. 1 is the overall structure diagram of the embodiment of the present application magnetic resonance imaging eye coil device；
Fig. 2 is one of partial structural diagram of the embodiment of the present application magnetic resonance imaging eye coil device；
Fig. 3 is the two of the partial structural diagram of the embodiment of the present application magnetic resonance imaging eye coil device；
Fig. 4 is the structure diagram of the embodiment of the present application magnetic resonance imaging eye coil device coil..
Wherein：1-B0 field generators, 1a- lying bed accepting holes, 2- coil cases, 2a- put hand hole, 3- hand coils, 3a- lines
Coil unit I, 3b- coil units II, 4- lying beds, 5- supporting racks.
Specific embodiment
The application is described in further detail below by specific embodiment combination attached drawing.The application can be with a variety of
Different forms is realized, however it is not limited to the present embodiment described embodiment.The purpose of detailed description below is provided
It is easy for becoming apparent from present disclosure thorough explanation, the words of the wherein indicating positions such as upper and lower, left and right is only pin
To shown structure in respective figure for position.
However, those skilled in the art may be aware that one or more detail description can be by
It omits or other methods, component or material can also be used.In some instances, some embodiments are not described
Or it is not described later in detail.
In addition, technical characteristic described herein, technical solution can also be closed arbitrarily in one or more embodiments
Suitable mode combines.For those skilled in the art, should be readily appreciated that with provided herein is embodiment related method
Step or operation order can also change.Therefore, any order in drawings and examples is merely illustrative purposes, not secretly
Show requirement in a certain order, required unless expressly stated according to a certain order.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any order or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
Embodiment one：
Fig. 1 to Fig. 3 shows first tool of this coil device for the imaging of horizontal magnetic resonance hand of the application
Body embodiment.Identical with traditional hand coil device, which also includes：For generating the B0 field generators of B0
1, coil case 2, the hand coil 3 in coil case 2.
The key improvements of the present embodiment are：The device further includes one for for being lain on the back lying bed 4 by imaging person.Above-mentioned line
Circle shell 2 is arranged in the top of lying bed 4 by supporting rack 5, and there are one for being imaged for horizontal perforation setting in coil case 2
What person's hand stretched into puts hand hole 2a.The B0 field directions that the axis of hand hole 2a is generated perpendicular to B0 field generators 1 are put, for the side of statement
Just, the B0 field directions that B0 field generators 1 generate are defined as " longitudinal direction " by us, and the axis extending direction for putting hand hole 2a is defined as
" transverse direction ".Above-mentioned hand coil 3 surround the periphery for being arranged in and putting hand hole 2a.
It during practical application, is lain supine upon in lying bed 4, and makes as far as possible flat by the height of imaging person by imaging person (i.e. those who are investigated)
The B0 field directions that row is generated in B0 field generators 1.Lift on hand to neck top and is horizontally extended by coil case 2 by imaging person
Put in hand hole 2a, start imaging inspection, those who are investigated are in very comfortable posture.It is put because hand coil 3 surround to be arranged in
The periphery of hand hole 2a, and put hand hole 2a axially bored line and B0 field directions it is perpendicular, then the whole normal of hand coil 3 is also
Perpendicular to or substantially perpendicular to B0 field directions, so 3 received signal of hand coil is stronger, the image of acquisition is relatively sharp.
In the present embodiment, the outer profile of lying bed 4 is generally rectangular shaped, and length direction is generated with foregoing B0 field generators 1
B0 field directions are parallel, and during to lie supine upon lying bed 4 by imaging person, height is just basically parallel to B0 field generators 1 and generates
B0 field directions.
With reference to shown in Fig. 1, the substantially cylindrical structure of main part of above-mentioned B0 field generators 1, including lying described in confession
The lying bed accepting hole 1a that bed 4 stretches into, lying bed 4 are flexibly connected by straight-line displacement guide rail with B0 field generators 1, and cause the lying bed
4 can be moved in and out lying bed accepting hole 1a by straight-line displacement guide rail.During imaging inspection, lying bed 4 is all first removed to lying bed and is received
Hold outside the 1a of hole, treat that those who are investigated lie supine upon lying bed 4 and stretch into hand to put hand hole 2a and then lying bed 4 is moved into lying bed and accommodate
In the 1a of hole.
It is different in view of everyone figure size, if position of the coil case 2 in lying bed 4 is fixed and can not
It adjusting, the those who are investigated that some figures will certainly be caused larger or smaller hand placement position in imaging inspection is not comfortable enough,
So the coil case 2 in the present embodiment is the top that lying bed 4 is adjustably supported in by above-mentioned 5 position of supporting rack.Specifically,
Link position of the supporting rack 5 in lying bed 4 is adjustable, while the height of supporting rack 5 is also adjustable, so realizes that coil case 2 is being lain
Upright position and horizontal level on bed 4 is adjustable.
With reference to shown in Fig. 2 and Fig. 3, above-mentioned hand coil 3 includes being looped around I 3a of coil unit for putting hand hole 2a peripheries
(center wound coil unit) and around seven II 3b of coil unit (surface coil units) put hand hole 2a and be sequentially arranged.I
Find, the hand coil 3 of this structure type has extraordinary imaging definition.
In the present embodiment, two II 3b of coil unit arrangements (partly overlapping) intersected with each other of arbitrary neighborhood, using part
Overlap mode decouples.And the normal of II 3b of each coil unit is each perpendicular to put hand hole 2a axis arrangement.
" normal of coil unit II " mentioned here has such meaning:Coil unit II is the ring junction being closed
Structure, as soon as the closed annular surrounds a face, described normal refers to the normal in this face.
Embodiment two：
Fig. 4 shows second specific implementation of this coil device for the imaging of horizontal magnetic resonance hand of the application
Example.The structure of coil device and one center line coil apparatus of above-described embodiment in the present embodiment is essentially identical, and uniquely difference lies in hands
The concrete structure of portion's coil 3 and embodiment one are different.In the present embodiment, hand coil 3 includes being looped around putting outside hand hole 2a
Two I 3a of coil unit (center wound coil unit) for enclosing and around seven coil units II put hand hole 2a and be sequentially arranged
3b (surface coil units), I 3a of the two coil units are collectively formed the parallel portion being mutually parallel and intersect cloth in X-shaped
The cross section put, the parallel portion and the cross section integrally connected and form a closed annular structure.
The foregoing is a further detailed description of the present application in conjunction with specific implementation manners, it is impossible to assert this Shen
Specific implementation please is confined to these explanations.For those of ordinary skill in the art to which this application belongs, do not taking off
On the premise of conceiving from the application, several simple deduction or replace can also be made.
Claims (9)
1. a kind of coil device for the imaging of horizontal magnetic resonance hand, including：
For generating the B0 field generators (1) of B0,
Coil case (2) and
Hand coil (3) in the coil case (2)；
It is characterized in that, it further includes for for the lying bed (4) lain on the back by imaging person, the coil case (2) to be arranged in described lie
Bed (4) top, and the coil case (2) in be formed with it is horizontal-extending, put hand hole for what is stretched by imaging person's hand
(2a), the axis for putting hand hole (2a) is vertical with the B0 field directions that the B0 field generators (1) generate, the hand coil
(3) it surround and is arranged in the periphery for putting hand hole (2a).
2. the coil device according to claim 1 for the imaging of horizontal magnetic resonance hand, which is characterized in that the hand
Portion's coil (3) includes being looped around at least one coil unit I (3a) for putting hand hole (2a) periphery.
3. the coil device according to claim 2 for the imaging of horizontal magnetic resonance hand, which is characterized in that the line
There are two coil unit I (3a) is set altogether, two coil units I (3a) are collectively formed the parallel portion being mutually parallel and are in
The cross section of X-shaped arranged crosswise, the parallel portion and the cross section integrally connected and form a closed annular knot
Structure.
4. the coil device according to claim 2 for the imaging of horizontal magnetic resonance hand, which is characterized in that the hand
Portion's coil (3) is further included puts several coil units II (3b) that hand hole (2a) is sequentially arranged around described.
5. the coil device according to claim 4 for the imaging of horizontal magnetic resonance hand, which is characterized in that Mei Gesuo
The normal for stating coil unit II (3b) is each perpendicular to described put hand hole (2a) axis arrangement.
6. the coil device according to claim 4 for the imaging of horizontal magnetic resonance hand, which is characterized in that arbitrary phase
The two adjacent coil unit II (3b) arrangements intersected with each other.
7. the coil device according to claim 4 for the imaging of horizontal magnetic resonance hand, which is characterized in that the line
Coil unit II (3b) is provided with seven altogether.
8. the coil device according to claim 1 for the imaging of horizontal magnetic resonance hand, which is characterized in that the B0
Field generator (1) includes the lying bed accepting hole (1a) stretched into for the lying bed (4), and the lying bed (4) passes through straight-line displacement guide rail
It is flexibly connected with the B0 field generators (1), and causes the lying bed (4) that the lying bed accepting hole (1a) can be moved in and out.
9. the coil device according to claim 1 for the imaging of horizontal magnetic resonance hand, which is characterized in that the line
Circle shell (2) is adjustably supported in the top of the lying bed (4) by supporting rack (5) position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721276822.8U CN207457479U (en) | 2017-09-30 | 2017-09-30 | A kind of coil device for the imaging of horizontal magnetic resonance hand |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721276822.8U CN207457479U (en) | 2017-09-30 | 2017-09-30 | A kind of coil device for the imaging of horizontal magnetic resonance hand |
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| CN207457479U true CN207457479U (en) | 2018-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561465A (en) * | 2017-09-30 | 2018-01-09 | 苏州众志医疗科技有限公司 | A kind of coil device for the imaging of horizontal magnetic resonance hand |
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- 2017-09-30 CN CN201721276822.8U patent/CN207457479U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561465A (en) * | 2017-09-30 | 2018-01-09 | 苏州众志医疗科技有限公司 | A kind of coil device for the imaging of horizontal magnetic resonance hand |
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