CN105785294B - A kind of egg coil device for magnetic resonance imaging - Google Patents
A kind of egg coil device for magnetic resonance imaging Download PDFInfo
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- CN105785294B CN105785294B CN201410801605.0A CN201410801605A CN105785294B CN 105785294 B CN105785294 B CN 105785294B CN 201410801605 A CN201410801605 A CN 201410801605A CN 105785294 B CN105785294 B CN 105785294B
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Abstract
The invention discloses a kind of egg coil devices for magnetic resonance imaging, including holder, support column and radio-frequency coil mechanism, it is characterized in that, support column is mounted on the top of the center of holder, the center of support column is equipped with shrinkage pool, cavity is equipped between the outer surface and concave surface of support column, radio-frequency coil mechanism is mounted on the inside of cavity, radio-frequency coil mechanism includes loop coil and saddle-type coil, the number of loop coil is no less than three, and the number of saddle-type coil is no less than one.The present invention can be such that egg to be measured steadily places, avoid damage to eggshell, so that egg embryo can continue to develop and carry out subsequent correlative study, efficient signal reception may be implemented in the four-way radio circuit being made of loop coil and saddle-type coil in the present invention, ensure that the high s/n ratio and high-resolution of coil.
Description
Technical field
The present invention relates to mr imaging technique field, specifically a kind of egg radio-frequency coil for magnetic resonance imaging fills
It sets.
Background technology
Magnetic resonance imaging MRI system treats the hydrogen nuclei in imaging body using the uniform strong magnetic field for carrying out autonomous magnetic system B0
Spin polarizes, and magnetic polarization nuclear spin generates magnetic moment i in human body, and magnetic moment i is directed toward main field direction in stable state,
Useful information is not will produce if not encouraging disturbance.
NMR signal NMR is generated by uniform radio frequency magnetic excitation magnetic moment, to obtain magnetic resonance imaging system
System MRI data, radio frequency magnetic field are known as exciting magnetic field or the magnetic fields B1.Radio-frequency sending coil is generated in the image-region of required detection
The magnetic fields B1, the radio-frequency sending coil using the radiofrequency launcher by computer control of power amplifier by being driven.It was exciting
Cheng Zhong, nuclei spin system absorb energy, make magnetic moment around the precession of main field direction.After excitation, the magnetic moment of precession will be through
Free induction decay FID is gone through, the energy of its absorption is discharged and returns to stable state.In free induction decay FID, waited for using being placed on
Imaging body is excited the detection NMR signal of the reception radio-frequency coil near part NMR.NMR signal NMR is to be in connect
The second voltage or electric current, the voltage or electric current received in radio-frequency coil are induced by the precessing magnetic moment of tissue.Receive radio frequency
Coil can be that transmitting coil itself can also be the absolute coil for only receiving radiofrequency signal.By being integrated in main field system
Gradient coil generate extra-pulse gradient magnetic, the atomic nucleus in the voxel of position required for selectively exciting, and can be with
Frequency coding and phase code are carried out to signal, so that it is determined that its space coordinate, eventually passes through Fourier transform, establish one it is complete
Whole magnetic resonance imaging.
In magnetic resonance imaging system MRI, magnetic field's regularity caused by transmitting coil and receiving coil is to obtain height
One key factor of quality image.In the magnetic resonance imaging system of standard, for emitting generally use whole-body radio frequency coil
Best excitation field uniformity is obtained, whole-body radio frequency coil is maximum radio-frequency coil in system.But it if uses simultaneously larger
Coil receive, then will produce lower Signal to Noise Ratio (SNR), this is primarily due to such coil and tissue occurs for the signal of imaging
Distance is farther out.Because the most importantly high s/n ratio SNR in magnetic resonance imaging system MRI, is carried out using coils special
Radio frequency reception is to improve the Signal to Noise Ratio (SNR) of required probe portion.But due to each not phase of the shape of each physiological site of human body
Together, and it is very irregular, and also difference is very big for size, so how special according to the physiological structure at each position of human body
Point, dexterously arranges coil circuit, is always the world to obtain more uniform Distribution of Magnetic Field and larger detectivity
The maximum task of coil designer.
Medical magnetic resonance system is outer in addition to carrying out imaging diagnosis to human body, and medical researchers are usually used to carry out some to move
Physical property experiment, to study the growth course and some pathological processes of animal tissue, organ.In this demand, open in succession
Magnetic resonance experiments mouse coil, magnetic resonance experiments rabbit coil etc. are sent out.In recent years, it is desirable to pass through magnetic resonance imaging system
MRI studies the growth course of egg embryo, because embryo can be kept injury-free magnetic resonance imaging system MRI and after supervention
It educates, this just overcomes the shortcomings that must damaging embryo in the previous electron microscopy study egg embryo usually used.But due to egg
Shape it is special, and three-dimensional dimension very little, existing coil, even common rabbit, the zooperies coil such as mouse,
It is difficult to carry out egg the MRI imagings of high quality.
Invention content
The purpose of the present invention is to provide a kind of egg radio frequency lines for magnetic resonance imaging simple in structure, reliability is high
Coil apparatus, to solve the problems mentioned in the above background technology.
To achieve the above object, the present invention provides the following technical solutions：
A kind of egg coil device for magnetic resonance imaging, including holder, support column and radio-frequency coil mechanism,
It is characterized in that, the support column is mounted on the top of the center of holder, and the center of the support column is equipped with shrinkage pool, institute
It states and is equipped with cavity between the outer surface of support column and concave surface, the radio-frequency coil mechanism is mounted on the inside of cavity, radio frequency
Coil mechanism includes loop coil and saddle-type coil, and the number of the loop coil is no less than three, and loop coil is uniform
It is horizontally arranged in cavity, the diameter of loop coil successively decreases successively from top to bottom, and the saddle-type coil is mounted on loop coil
In the cavity of periphery, and the number of saddle-type coil is no less than one.
As a further solution of the present invention：The magnetic direction of the loop coil is perpendicular to magnetic resonance imaging system
The longitudinal direction of main field.
As further scheme of the invention：The magnetic direction of the saddle-type coil is perpendicular to magnetic resonance imaging system
The horizontal direction for main field of uniting.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention can be such that egg to be measured steadily places, and avoid damage to eggshell, so that egg embryo can continue
Subsequent correlative study is developed and carries out, the four-way radio circuit being made of loop coil and saddle-type coil in the present invention can
To realize efficient signal reception, the high s/n ratio and high-resolution of coil ensure that.
Description of the drawings
Fig. 1 the structural representation of present invention.
Fig. 2 is the sectional view of the present invention.
In figure：1- holders；2- support columns；3- shrinkage pools；4- radio-frequency coils mechanism；5- loop coils；8- saddle-type coils；9-
Cavity.
Specific implementation mode
The technical solution of this patent is described in more detail With reference to embodiment.
- 2 are please referred to Fig.1, a kind of egg coil device for magnetic resonance imaging is placed on magnetic resonance imaging system
In, the egg coil device for magnetic resonance imaging includes holder 1, support column 2 and radio-frequency coil mechanism 4, described
Holder 1 is circle, and the support column 2 is mounted on the top of the center of holder 1, and the center of the support column 2 is equipped with
Shrinkage pool 3, the shape of the shrinkage pool 3 are ellipse, for placing egg, between 3 surface of outer surface and shrinkage pool of the support column 2
Equipped with cavity 9, the radio-frequency coil mechanism 4 is mounted on the inside of cavity 9, and radio-frequency coil mechanism 4 includes loop coil 5 and horse
The number of saddle coil 8, the loop coil 5 is no less than three, and loop coil 5 is uniformly horizontally arranged in cavity 9, annular
The diameter of coil 5 successively decreases successively from top to bottom, and the saddle-type coil 8 is mounted in the cavity 9 of 5 periphery of loop coil, and
The number of saddle-type coil 8 is no less than one.The magnetic direction of the loop coil 5 is each perpendicular in magnetic resonance imaging system main
The longitudinal direction in magnetic field, the transverse direction side of magnetic direction main field in magnetic resonance imaging system of the saddle-type coil 8
To.
The present invention can be such that egg to be measured steadily places, and avoid damage to eggshell, so that egg embryo can continue
Develop and carry out subsequent correlative study, the four-way radio circuit being made of loop coil 5 and saddle-type coil 8 in the present invention
Efficient signal reception may be implemented, ensure that the high s/n ratio and high-resolution of coil.
The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party
Formula, one skilled in the relevant art within the scope of knowledge, can also be under the premise of not departing from this patent objective
Various changes can be made.
Claims (3)
1. a kind of egg coil device for magnetic resonance imaging, including holder（1）, support column（2）With radio-frequency coil machine
Structure（4）, which is characterized in that the support column（2）Mounted on holder（1）Center top, the support column（2）In
Heart position is equipped with shrinkage pool（3）, the support column（2）Outer surface and shrinkage pool（3）Cavity is equipped between surface（9）, the radio frequency
Coil mechanism（4）Mounted on cavity（9）Inside, radio-frequency coil mechanism（4）Including loop coil（5）And saddle-type coil（8）,
The loop coil（5）Number be no less than three, loop coil（5）Uniformly it is horizontally arranged at cavity（9）In, loop coil
（5）Diameter successively decrease successively from top to bottom, the saddle-type coil（8）Mounted on loop coil（5）The cavity of periphery（9）In,
And saddle-type coil（8）Number be no less than one.
2. the egg coil device according to claim 1 for magnetic resonance imaging, which is characterized in that the annular
Coil（5）Magnetic direction in the longitudinal direction perpendicular to magnetic resonance imaging system main field.
3. the egg coil device according to claim 1 for magnetic resonance imaging, which is characterized in that the saddle
Shape coil（8）Magnetic direction in the horizontal direction perpendicular to magnetic resonance imaging system main field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410801605.0A CN105785294B (en) | 2014-12-22 | 2014-12-22 | A kind of egg coil device for magnetic resonance imaging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410801605.0A CN105785294B (en) | 2014-12-22 | 2014-12-22 | A kind of egg coil device for magnetic resonance imaging |
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| Publication Number | Publication Date |
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| CN105785294A CN105785294A (en) | 2016-07-20 |
| CN105785294B true CN105785294B (en) | 2018-08-21 |
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| CN201410801605.0A Active CN105785294B (en) | 2014-12-22 | 2014-12-22 | A kind of egg coil device for magnetic resonance imaging |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7397243B1 (en) * | 2007-02-23 | 2008-07-08 | Kenergy, Inc. | Magnetic resonance imaging system with a class-E radio frequency amplifier having a feedback circuit |
| CN203149100U (en) * | 2013-02-26 | 2013-08-21 | 江苏美时医疗技术有限公司 | Knee radio frequency coil for magnetic resonance imaging system |
| CN204389667U (en) * | 2014-12-22 | 2015-06-10 | 上海辰光医疗科技股份有限公司 | A kind of egg coil device for magnetic resonance imaging |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101208610A (en) * | 2005-06-24 | 2008-06-25 | 皇家飞利浦电子股份有限公司 | Meanwhile multiple nmr imaging |
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2014
- 2014-12-22 CN CN201410801605.0A patent/CN105785294B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7397243B1 (en) * | 2007-02-23 | 2008-07-08 | Kenergy, Inc. | Magnetic resonance imaging system with a class-E radio frequency amplifier having a feedback circuit |
| CN203149100U (en) * | 2013-02-26 | 2013-08-21 | 江苏美时医疗技术有限公司 | Knee radio frequency coil for magnetic resonance imaging system |
| CN204389667U (en) * | 2014-12-22 | 2015-06-10 | 上海辰光医疗科技股份有限公司 | A kind of egg coil device for magnetic resonance imaging |
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| Publication number | Publication date |
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| CN105785294A (en) | 2016-07-20 |
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