CN220040726U - Hand radio frequency coil device and magnetic resonance imaging system - Google Patents
Hand radio frequency coil device and magnetic resonance imaging system Download PDFInfo
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- CN220040726U CN220040726U CN202321307807.0U CN202321307807U CN220040726U CN 220040726 U CN220040726 U CN 220040726U CN 202321307807 U CN202321307807 U CN 202321307807U CN 220040726 U CN220040726 U CN 220040726U
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- 238000002595 magnetic resonance imaging Methods 0.000 title claims abstract description 20
- 241001133760 Acoelorraphe Species 0.000 claims description 23
- 239000004020 conductor Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 abstract description 15
- 210000003857 wrist joint Anatomy 0.000 description 7
- 210000001145 finger joint Anatomy 0.000 description 5
- 210000002478 hand joint Anatomy 0.000 description 5
- 230000005672 electromagnetic field Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 210000000707 wrist Anatomy 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000004247 hand Anatomy 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000001646 magnetic resonance method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The utility model relates to a hand radio frequency coil device for a magnetic resonance imaging system, which comprises a coil circuit arranged in a shell, wherein the coil circuit comprises a unit coil which is annularly closed, and an electronic element connected in the unit coil; the coil circuit comprises a first group of 4 unit coils distributed in a shape of a Chinese character 'tian' and a second group of 4 unit coils distributed in a shape of a Chinese character 'tian'; and the coil also comprises 8 third groups of unit coils which are distributed on the columnar surface in a head-tail connection way. The hand radio frequency coil device improves the hand imaging performance of the magnetic resonance imaging system, has higher signal-to-noise ratio, and is low in cost and convenient to use.
Description
Technical Field
The present utility model relates to a hand radio frequency coil device for a magnetic resonance imaging system and a magnetic resonance imaging system.
Background
The magnetic resonance imaging system is a large medical diagnosis device, and is a device for generating two-dimensional or three-dimensional images of human tissues according to the magnetic resonance imaging principle, and is widely applied to modern hospitals. Common magnetic resonance imaging systems generally comprise: generating a static homogeneous magnetic field B 0 Is a main magnet of (a); the radio frequency system comprises a radio frequency coil for exciting human tissue to generate magnetic resonance and receiving resonance signals; a gradient system for generating a gradient magnetic field in an imaging space and imaging coding; and a computer imaging system for processing the magnetic resonance signals to generate visual images for viewing by a physician.
In a magnetic resonance system, both excitation and reception of the radio frequency magnetic field are accomplished by radio frequency coils. It is critical that the signal-to-noise ratio of the radio frequency coil is high to obtain a magnetic resonance image that reflects the scanned body part clearly enough. Probing and diagnosing lesions of the hand, wrist and surrounding tissues using magnetic resonance methods is popular with doctors and patients. However, due to the fine hand tissue structure, the signal to noise ratio of the corresponding radio frequency coil needs to be improved.
Disclosure of Invention
The utility model provides a hand radio frequency coil device for a magnetic resonance imaging system and the magnetic resonance imaging system, which aim to solve the problem that the signal-to-noise ratio of the hand radio frequency coil device in the existing magnetic resonance imaging system is insufficient.
In order to solve the problems, the technical scheme adopted by the utility model is as follows:
a hand radio frequency coil device comprising a coil circuit built in a housing, the coil circuit comprising a ring-shaped unit coil, and an electronic component connected thereto;
the coil circuit comprises a first group of unit coils and a second group of unit coils, wherein the first group of unit coils and the second group of unit coils respectively comprise 4 unit coils distributed in a shape of Chinese character 'tian'; the first group of unit coils and the second group of unit coils are oppositely arranged and respectively cover the surface of the palm position and the surface of the back hand position; conductors adjacent to two unit coils arranged in the direction from the small finger to the large finger in the first group of unit coils and the second group of unit coils are overlapped with each other, and the area enclosed by the two unit coils arranged in the direction from the fingertip to the palm root is partially overlapped;
the coil circuit also comprises a third group of unit coils, wherein the third group of unit coils comprises 8 unit coils which are distributed on the columnar surface in a head-tail connection manner; each unit coil in the third group of unit coils is partially overlapped with the area surrounded by the adjacent unit coils;
the areas surrounded by the unit coils adjacent to the unit coils in the third group of unit coils in the first group of unit coils and the second group of unit coils are partially overlapped with each other.
The hand radio frequency coil device comprises a first group of unit coils, a second group of unit coils, a fifth group of unit coils and a sixth group of unit coils; the second group of unit coils comprise a unit coil III, a unit coil IV, a unit coil seven and a unit coil eight; the third group of unit coils comprises a unit coil nine, a unit coil ten, a unit coil eleven and a unit coil sixteen; the areas enclosed by the unit coil five and the unit coil sixteen, the unit coil six and the unit coil ten, the unit coil seven and the unit coil fourteen and the unit coil eight and the unit coil twelve are overlapped with each other partially; the area enclosed by the unit coil nine is overlapped with the area enclosed by the unit coil five and the unit coil six at the same time; the area enclosed by the unit coils 13 thirteen is partially overlapped with the area enclosed by the unit coils seven and eight.
The hand radio frequency coil device comprises a hand radio frequency coil device body, wherein the hand radio frequency coil device body comprises a hand radio frequency coil device body, a hand radio frequency coil device body and a hand radio frequency coil device body, wherein the hand radio frequency coil device body comprises an inner shell and an outer shell which are mutually matched to form a containing space; the coil circuit is fixed to the inner housing.
The hand radio frequency coil device, the shell and the coil circuit built in the shell can be opened to form an open space.
In the hand radio frequency coil device, when the shell and the coil circuit built in the shell are opened to form an open space, conductors of the unit coil fifteen and/or the unit coil eleven are separated through a break point.
And the conductor material of the unit coil is copper strips or a thin circuit board.
A hand radio frequency coil device comprising a coil circuit built in a housing, the coil circuit comprising a ring-shaped unit coil, and an electronic component connected thereto; the coil circuit comprises 8 unit coils which are distributed on the columnar surface in a head-tail connection way; and each unit coil is partially overlapped with the area enclosed by the adjacent unit coil.
A hand radio frequency coil device comprising a coil circuit built in a housing, the coil circuit comprising a ring-like closed unit coil, and an electronic component connected thereto; the coil circuit comprises 8 first group unit coils and second group unit coils which are distributed at the palm position and the back position in a field shape respectively; the first group of unit coils and the second group of unit coils are oppositely arranged and respectively cover the surface of the palm position and the surface of the back hand position; the conductors adjacent to the two unit coils arranged in the direction from the small finger to the big finger in the first group and the second group of unit coils are overlapped with each other, and the areas enclosed by the two unit coils arranged in the direction from the fingertip to the palm root are partially overlapped.
A magnetic resonance imaging system comprising any of the hand radio frequency coil arrangements described.
The hand radio frequency coil device used by the magnetic resonance imaging system improves the hand imaging performance of the magnetic resonance imaging system, has higher signal-to-noise ratio, and is low in cost and convenient to use.
Drawings
Fig. 1 is a schematic perspective view of a coil circuit of a hand rf coil device of the present utility model.
Fig. 2 is a schematic diagram of the external structure of the hand rf coil device of the present utility model.
Fig. 3-18 are schematic illustrations of the shape of the unit coils of the hand radio frequency coil device of the present utility model.
Figure 19 is a high quality magnetic resonance imaging using the hand radio frequency coil of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings. The implementation of the utility model is not limited to the embodiments described below, but can be implemented in many different forms. The following examples are provided to facilitate a more thorough understanding of the present disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
The hand radio frequency coil of the magnetic resonance imaging system is a high-precision radio frequency antenna, the inherent resonance frequency of the hand radio frequency coil is equal to the magnetic resonance frequency of the magnetic resonance system, the hand joint radio frequency coil is in a detuned state or enters a resonance state according to an input imaging sequence in a working state, the hand joint and surrounding tissues are positioned in a radio frequency electromagnetic field of the hand joint radio frequency coil, the higher the strength of the radio frequency electromagnetic field is, the more uniform the imaging range is, and the more complete and distortion-free the imaging range is; the stronger the collected signals of the hand joint and its surrounding tissue, the higher the signal-to-noise ratio and the clearer the imaging.
The electric structure of the hand radio frequency coil mainly comprises a coil body made of conductive materials and an electronic element connected in the coil body. In the working state, the output impedance of the hand radio frequency coil is matched with the back-end data collection equipment, and clear and noiseless image signals of hand joints and other tissues are derived without interference.
In order to obtain a radio frequency coil with excellent signal to noise ratio and good uniformity, the distribution of each unit in the coil is a difficulty in coil design, and the shapes and the distribution of different units determine the final achievable performance of the coil. The best coil configuration should also be easy to debug because the distribution parameters of the coil in the radio frequency environment cause interactions between the parts.
Fig. 1 is a schematic perspective view of a coil circuit of a hand rf coil device of the present utility model. The hand radio frequency coil comprises 16 unit coils, each unit coil is in a closed annular shape connected end to end, and the unit coils also comprise (not shown in fig. 1) electronic elements such as inductance, capacitance and the like and electronic circuits (optional) such as detuning, amplifying and the like and can commonly resonate at the magnetic resonance frequency. The specific shape and size of the unit coils are different, including: a first unit coil, a second unit coil, a third unit coil, a fourth unit coil, a fifth unit coil, a sixth unit coil, a seventh unit coil, a eighth unit coil, a ninth unit coil, a tenth unit coil, a eleventh unit coil, a twelfth unit coil, a thirteenth unit coil, a fourteen unit coil, a fifteen unit coil and a sixteenth unit coil.
As shown in fig. 1, the 16 unit coils may be divided into a first group, a second group, and a third group, each of which covers a part of the surface of the scanned hand.
The first group of unit coils comprise unit coils I, II, five and six, and cover one surface of the knuckle part, namely one surface of the palm or one surface of the back of the hand; the second set of unit coils includes unit coils three, four, seven and eight, covering the other face of the knuckle part, i.e., the back of the hand or the palm of the hand of the knuckle part. As can be seen in fig. 1, the first set of unit coils and the second set of unit coils collectively enclose the knuckle region of the palm.
The 4 unit coils of the first group of unit coils are distributed like a Chinese character 'tian', and the unit coil I is adjacent to the unit coil II and positioned at the position of a fingertip; the unit coil five is adjacent to the unit coil six and is positioned at a position far from the fingertip; the adjacent conductors of the first unit coil and the second unit coil are overlapped with each other; the conductors adjacent to the unit coil five and the unit coil six overlap each other. The areas enclosed by the first unit coil, the fifth unit coil and the second unit coil are partially overlapped. The first set of unit coil arrangements collectively cover either the palm surface or the back surface of the knuckle.
The arrangement of the second group of unit coils is similar to that of the first group of unit coils, and the unit coils III and IV are adjacent and positioned at the positions of fingertips; the unit coil seven and the unit coil eight are adjacent and are positioned at a position far from the fingertip; the third and fourth unit coils and the seventh and eighth unit coils are overlapped side by side; the areas enclosed by the unit coils III and seven and the unit coils IV and eight are partially overlapped. The second group of unit coils are arranged together to cover the back surface or the palm surface of the finger joints.
The third group of unit coils comprises nine unit coils to sixteen unit coils which are connected end to end and distributed on the cylindrical surface; the method is mainly used for collecting magnetic resonance signals of the wrist joint part; as shown in fig. 1, the area enclosed by each of the unit coils of the third group has a portion overlapping with the area of the adjacent unit coil. And, the third group of unit coils also overlaps with adjacent unit coils in the first group and the second group of unit coils by a partial area, namely: the areas surrounded by the sixteen, nine and ten unit coils are respectively overlapped with the areas surrounded by the five and six adjacent unit coils; the areas surrounded by the twelve, thirteenth and fourteen unit coils are also partially overlapped with the areas surrounded by the seven and eight adjacent unit coils respectively.
Specifically, the area enclosed by sixteen unit coils and five unit coils is partially overlapped; the area enclosed by the unit coil and the unit coil is partially overlapped; the unit coil nine is partially overlapped with the area enclosed by the unit coils five and six respectively.
Similarly, the area surrounded by twelve unit coils and eight unit coils is partially overlapped; the area enclosed by the fourteen unit coils and the seven unit coils is partially overlapped; the unit coils thirteen are respectively overlapped with the enclosed areas of the unit coils eight and seven.
With continued reference to fig. 1, the first and second sets of unit coils of the hand rf coil device of the present utility model cover the palm and back of the finger joint portion, respectively, and together enclose the surface of the palm portion. The third group of unit coils is enclosed and covered on the surface of the wrist joint part.
The coil units are made of copper strips or circuit boards, and further comprise electronic components such as inductors, capacitors, detuning circuits and the like connected in the coils of the units. When the hand radio frequency coil is positioned in a magnetic resonance electromagnetic field in a working state, each coil unit enters a resonance state, and a magnetic resonance signal is output to a diode amplifier through a preamplifier built in the coil.
Each unit coil in the hand radio frequency coil is very complex to resonant tune at the magnetic resonance frequency. The different arrangement modes of the plurality of unit coils and the shape of the coils have great influence on the performance of the radio frequency coil, so the shape of the unit coils and how the arrangement is in the radio frequency coil determine the performance of the radio frequency coil. The mutual coupling between the coil units is removed through the conductor overlapping of the unit coils, the partial overlapping of the area enclosed by the unit coils and the inductance or capacitance.
As shown in fig. 2, the external perspective view of the hand rf coil of the present utility model is a hollow column, and the hollow portion is the position where the hand is scanned when the coil works, i.e. the imaging space of the hand rf coil device. The hand radio frequency coil also comprises a shell, wherein the shell comprises an inner shell and an outer shell which are mutually matched to form a containing space, and the coil circuit part shown in fig. 1 is distributed and fixed on the inner shell (not shown in the figure). The outer shell and the inner shell are mutually fixed to accommodate and wrap the coil circuit.
The hand radio frequency coil device comprises an upper part and a lower part which can be separated, and when the upper part and the lower part of the hand radio frequency coil are opened, the hand of a patient is conveniently placed in the hand radio frequency coil so as to facilitate magnetic resonance scanning; then the upper and lower parts of the hand radio frequency coil are folded, locked and electrically connected, and the magnetic resonance system can be started to scan and image when the hand radio frequency coil is placed in the center of the magnet. The inner housing of the coil also includes separable upper and lower halves; the housing of the coil also includes separable upper and lower halves; an upper half part of the coil circuit is fixed in an upper half part of the coil inner shell; a lower half part of the coil circuit is fixed in a lower half part of the coil inner shell; and the upper half part of the coil outer shell is matched with the upper half part of the coil inner shell to form a containing space, and the lower half part of the coil outer shell is matched with the lower half part of the coil inner shell to form a containing space.
The inner shell of the hand radio frequency coil is designed into a palm shape and is matched with (conformal with) the scanning part of the hand.
Referring to fig. 1 and 2, when the hand rf coil of the present utility model is opened to be divided into upper and lower halves, the unit coil circuit is also divided into upper and lower halves. Corresponding parts of the first group of unit coils and the third group of unit coils are distributed and fixed in the coil inner shell of the upper half part; the corresponding other parts of the second group of unit coils and the third group of unit coils are distributed and fixed in the coil inner shell of the lower half part.
In one embodiment, unit coils sixteen, nine and ten in the third group of unit coils, and half of unit coil fifteen intersecting unit coil sixteen, half of unit coil eleven intersecting unit coil ten belong to the upper half of the coil circuit together with the first group of unit coils; the unit coils twelve, thirteen and fourteen in the third group of unit coils, and half of the unit coil fifteen intersecting the unit coil fourteen, half of the unit coil eleven intersecting the unit coil twelve, belong to the lower half of the coil circuit together with the second group of unit coils.
Because only the fifteen and the eleven unit coils are arranged on the left side and the right side of the wrist joint, the hand radio frequency coil maintains electric connection when being opened and closed again, and the conductors of the fifteen and the eleven unit coils are connected by using the radio frequency connector, the used radio frequency connector is less, the cost is reduced, and the reliability of the coil is improved.
In the magnetic resonance imaging process, the hand radio frequency coil device provided by the utility model is encircled at the joint parts of the palm and the wrist, so that the hand can be scanned and imaged. The excitation and the reception of the radio frequency magnetic field are completed by the radio frequency coil. For the receiving coil, it is important to improve the signal-to-noise ratio. Covering a larger imaging area, multiple unit coils are required to surround the entire imaging object. The utility model adopts smaller coils to be reasonably distributed and is close to the hands to obtain higher signal-to-noise ratio, and the imaging quality is better.
Fig. 3 to 18 illustrate the shapes of 16 unit coils (first coil unit 1 to sixteenth coil unit 16), respectively. Wherein fig. 3 is the shape of the first coil unit 1; fig. 4 is a shape of the second coil unit 2; fig. 5 is a shape of the third coil unit 3; fig. 6 is a shape of the fourth coil unit 4; fig. 7 is a shape of the fifth coil unit 5; fig. 8 is a shape of the sixth coil unit 6; fig. 9 is a shape of the seventh coil unit 7; fig. 10 is a shape of the eighth coil unit 8; fig. 11 is a shape of the ninth coil unit 9; fig. 12 is a shape of the tenth coil unit 10; fig. 13 is a shape of the eleventh coil unit 11; fig. 14 is a shape of the twelfth coil unit 12; 15 is the shape of the thirteenth coil unit 13; fig. 16 is a shape of the fourteenth coil unit 14; fig. 17 is a shape of the fifteenth coil unit 15; and fig. 18 is a shape of the sixteenth coil unit 16.
Referring to fig. 3 to 18 and fig. 1, it can be seen that the shapes of the 16 unit coils are different. The portions overlapping each other and the degree of overlap are each different.
The wrist joint part surrounds a circle of 8 unit rings, the conductors are densely and uniformly distributed, and the core position signal-to-noise ratio SNR is greatly improved. And 4 unit rings distributed in a shape of Chinese character 'tian' are respectively arranged at the palm center and the palm back of the palm part, so that the uniformity range of the radio frequency electromagnetic field is increased, and a larger imaging visual field is provided.
In one embodiment, the hand radio frequency coil device comprises only a first set and a second set of unit coils, and the first set of unit coils comprises 4 unit coils distributed in a field shape; the second group of unit coils also comprises 4 unit coils distributed in a shape of a Chinese character 'tian'; the first group of unit coils and the second group of unit coils are respectively distributed on the palm and the back surface of the hand, so that the finger joint part and the wrist joint part can be scanned and imaged.
In one embodiment, the hand radio frequency coil device only comprises a third group of unit coils, and the third group of unit coils comprise 8 unit coils which are connected end to end and distributed on the cylindrical surface and are enclosed on the hand, so that the finger joint part and the wrist joint part can be scanned and imaged.
The utility model also provides a magnetic resonance imaging system, which utilizes the hand radio frequency coil.
The radio frequency coil is divided into an upper part and a lower part which can be separated, and mutual electric connection and fixation are realized through the connector and the locking mechanisms at the two ends.
Fig. 19 is a high quality magnetic resonance scanning imaging chart of the hand rf coil of the present utility model, with scanning parameters of:
using the GE 3T DISCOVERY MR750 system; the scanning sequence is an FS-PD sequence; the thickness of the sheet is 2mm; the spacing between the sheets is 0.5; TR:1500; TE:43.7/Ef; FOV 12 x 12; resolution ratio: 320*288.
The finger joints, the palm positions, the back positions, the wrist joints and the like described in the specification are not accurate anatomical positions, but simply and clearly describe the mutual position relationship of each unit coil in the structure of the hand coil by means of the relative position relationship of the human body structure.
The above examples describe in particular and in detail several embodiments of the utility model, which are not limiting to the scope of the patent claims. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are within the scope of the present utility model, which is defined by the appended claims.
Claims (9)
1. A hand radio frequency coil device comprising a coil circuit built in a housing, the coil circuit comprising a ring-shaped unit coil, and an electronic component connected thereto; the method is characterized in that:
the coil circuit comprises a first group of unit coils and a second group of unit coils, wherein the first group of unit coils and the second group of unit coils respectively comprise 4 unit coils distributed in a shape of Chinese character 'tian'; the first group of unit coils and the second group of unit coils are oppositely arranged and respectively cover the surface of the palm position and the surface of the back hand position; conductors adjacent to two unit coils arranged in the direction from the small finger to the large finger in the first group of unit coils and the second group of unit coils are overlapped with each other, and the area enclosed by the two unit coils arranged in the direction from the fingertip to the palm root is partially overlapped;
the coil circuit also comprises a third group of unit coils, wherein the third group of unit coils comprises 8 unit coils which are distributed on the columnar surface in a head-tail connection manner; each unit coil in the third group of unit coils is partially overlapped with the area surrounded by the adjacent unit coils;
the areas surrounded by the unit coils adjacent to the unit coils in the third group of unit coils in the first group of unit coils and the second group of unit coils are partially overlapped with each other.
2. The hand radio frequency coil device according to claim 1, wherein the first set of unit coils comprises a unit coil one, a unit coil two, a unit coil five, and a unit coil six; the second group of unit coils comprise a unit coil III, a unit coil IV, a unit coil seven and a unit coil eight; the third group of unit coils comprises unit coils nine to sixteen; the areas enclosed by the unit coil five and the unit coil sixteen, the unit coil six and the unit coil ten, the unit coil seven and the unit coil fourteen and the unit coil eight and the unit coil twelve are overlapped with each other partially; the area enclosed by the unit coil nine is overlapped with the area enclosed by the unit coil five and the unit coil six at the same time; the area enclosed by the unit coil thirteen is overlapped with the area enclosed by the unit coil seven and the unit coil eight.
3. The hand radio frequency coil device according to claim 2, wherein the housing further comprises an inner case and an outer case which cooperate with each other to form a receiving space; the coil circuit is fixed to the inner housing.
4. A hand radio frequency coil device according to claim 3, wherein the housing and the coil circuit built-in the housing are openable to form an open space.
5. The hand radio frequency coil device according to claim 4, wherein the conductors of the unit coil fifteen and/or the unit coil eleven are separated by a break point when the housing and the coil circuit built in the housing are opened to form an open space.
6. The hand radio frequency coil device according to claim 5, wherein the conductor material of the unit coil is copper tape or a thin circuit board.
7. A hand radio frequency coil device comprising a coil circuit built in a housing, the coil circuit comprising a ring-shaped unit coil, and an electronic component connected thereto; the method is characterized in that: the coil circuit comprises 8 unit coils which are distributed on the columnar surface in a head-tail connection way; and each unit coil is partially overlapped with the area enclosed by the adjacent unit coil.
8. A hand radio frequency coil device comprising a coil circuit built in a housing, the coil circuit comprising a ring-like closed unit coil, and an electronic component connected thereto; the coil circuit is characterized by comprising 8 first group unit coils and second group unit coils which are distributed at the palm position and the back position in a field shape respectively; the first group of unit coils and the second group of unit coils are oppositely arranged and respectively cover the surface of the palm position and the surface of the back hand position; the conductors adjacent to the two unit coils arranged in the direction from the small finger to the big finger in the first group and the second group of unit coils are overlapped with each other, and the areas enclosed by the two unit coils arranged in the direction from the fingertip to the palm root are partially overlapped.
9. A magnetic resonance imaging system comprising a hand radio frequency coil device as claimed in any one of claims 1 to 8.
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