CN102309355A - Acupotomy compatible with magnetic resonance elastography - Google Patents
Acupotomy compatible with magnetic resonance elastography Download PDFInfo
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- CN102309355A CN102309355A CN2010102160929A CN201010216092A CN102309355A CN 102309355 A CN102309355 A CN 102309355A CN 2010102160929 A CN2010102160929 A CN 2010102160929A CN 201010216092 A CN201010216092 A CN 201010216092A CN 102309355 A CN102309355 A CN 102309355A
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- pin cutter
- acupotomy
- magnetic resonance
- resonance elastography
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Abstract
The invention provides an acupotomy compatible with magnetic resonance elastography. The acupotomy comprises an acupotomy tail, an acupotomy body and an acupotomy head, wherein an acupotomy handle is arranged at the acupotomy tail, a position in the acupotomy body, close to the acupotomy head, is further provided with a piezoelectric converter, and the piezoelectric converter is connected to a power supply through a ground wire and a signal wire. When the power supply is switched on, the piezoelectric converter converts an electric signal into mechanical vibration required by the magnetic resonance elastography, so that the mechanical vibration directly acts on in-vivo tissues and the attenuation of the mechanical vibration before the mechanical vibration reaches in-vivo deep tissues is avoided. Therefore, the acupotomy provided by the invention can be used for executing the magnetic resonance elastography in an acupotomy surgical operation by aiming at both the deep tissues and near human body surfaces, so that the mechanical attribute measurement of certain tissues can be accurately realized and necessary guidance is provided for the acupotomy therapy surgical operation.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, be specifically related to the pin cutter of a kind of compatible magnetic resonance (MR) elastogram.
Background technology
Pin cutter therapy is a kind of new Chinese traditional treatment technology, is the closure lysis between operation method and non-operative treatment.In the treatment of pin cutter therapy, the doctor uses the soft tissue around the surgical knife excision pathological changes that is called the pin cutter, to recover the dynamic equilibrium of human body.Verified, pin cutter therapy is the effective therapy of muscular tone of in some challenge disease, loosening.Employed needle set is the pin cutter in the pin cutter therapy, is processed by metal material usually, and its shape is slightly different according to purposes with length, and length is generally about 10-15cm, and diameter is that 1-2mm does not wait.The pin cutter generally includes pin cutter tail, pin cutter hub and pin cutter head three parts.
Because the pin cutter this closed operation of performing the operation, the doctor can't directly see focus in operative process, thereby the operation of pin cutter needs the doctor to have abundant dissect physiology to gain knowledge and clinical experience.For auxiliary doctor carries out visual operation, thereby reduce the risk of pin cutter operation, the pin cutter modus operandi of nuclear magnetic resonance guiding becomes a kind of important development trend of pin cutter medical domain.Simultaneously, because elasticity is the important physical of in-vivo tissue, normal structure is compared with pathological tissue, and there is bigger difference in both elasticity.Thereby; On the basis of magnetic resonance imaging system, increase the stimulator that produces mechanical vibration; By the mechanical attributes of magnetic resonance imaging system measuring body inner tissue under the outside stimulus effect that stimulator produced; Be the magnetic resonance elastography technology, diagnosis and treatment in the operation of pin cutter are had potential positive role.
Magnetic resonance elastography utilizes magnetic resonance to study the elastic information of in-vivo tissue or pathological changes, thereby can measure the mechanical attributes of tissue quantitatively.Specifically; Magnetic resonance elastography is to utilize special stimulator to produce mechanical vibration to act on in-vivo tissue, produces low-frequency shearing wave thus and propagates in organizing in vivo, and propagation of shear causes the particle displacement of in-vivo tissue; Obtain the MR phase image by magnetic resonance imaging system then; Draw the scattergram of the coefficient of elasticity of each point in the tissue based on this, thereby the elasticity after detection tissue or pathological changes are upset changes, the abnormality of discovery tissue such as tumor etc.
In the current magnetic resonance elastography technology, stimulator is positioned at human body surface, and the mechanical vibration that produced put on body surface.Yet the mechanical vibration that applied only are confined to body surface, just significantly decay before the degree of depth tissue in arriving body.Therefore, when this magnetic resonance elastography technology is applied to pin cutter therapy, be difficult to accurately measure the mechanical attributes of in-vivo tissue.
In the prior art, two types stimulator is arranged to the magnetic resonance elastography of degree of depth tissue.
A kind of is disclosed among the patent application WO2008/067053, and the biopsy needle that uses electromechanical to drive produces the required mechanical vibration of magnetic resonance elastography.Yet when this magnetic resonance elastography technology was applied to pin cutter therapy, biopsy needle can produce surgical operation with relevant electromechanical driver and disturb.And the stimulus of this biopsy needle still is positioned at human body surface, and the mechanical vibration that produced still can produce decay by a relatively large margin before the degree of depth tissue in arriving body.
Another kind is disclosed in patent application US2003/0065267A1, in conduit or puncture needle, uses sonic transducer and radio-frequency coil to carry out magnetic resonance elastography.But this magnetic resonance elastography technology can produce artefact in magnetic resonance elastography.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of pin cutter of compatible magnetic resonance elastography, can improve the effectiveness and the safety of pin cutter treatment.
Specifically; The pin cutter of a kind of compatible magnetic resonance elastography of the present invention; Comprise pin cutter hub and pin cutter head, the position near said pin cutter head in said pin cutter hub also comprises piezoelectric sender, and said piezoelectric sender is connected to power supply through ground wire and holding wire.Behind the power connection; Is the required mechanical vibration of magnetic resonance elastography by piezoelectric sender with electrical signal conversion; Thereby can mechanical vibration be directly acted on the in-vivo tissue that the operation of pin cutter is directed against, avoid being positioned at the decay of the mechanical vibration that stimulator produced before arriving body degree of depth tissue of body surface.
In a preferred embodiment of the invention; The width of said piezoelectric sender on the length direction of said pin cutter can be between 0.5-2mm; The surface of said piezoelectric sender and pin cutter hub surface maintain an equal level; Thereby can produce the mechanical vibration of 100-200Hz, can satisfy the needs that in-vivo tissue carried out magnetic resonance elastography basically.The distance of said piezoelectric sender and said pin cutter head can be 1cm, can when not influencing the operation of pin cutter, carry out the magnetic resonance elastography of degree of depth tissue in the body.
In a preferred embodiment of the invention, said piezoelectric sender can comprise supporting layer, is positioned at the piezoelectric element on the said supporting layer and is positioned at the wearing plate on the said piezoelectric element.Said supporting layer can be processed by epoxide resin material, and thickness is between 0.2-0.3mm.Said piezoelectric element can be piezoceramic material, and thickness is between 0.1-0.2mm.Said wearing plate can be processed by silastic material, and thickness is between 0.05-0.1mm.
In a preferred embodiment of the invention, said pin cutter hub can be processed by the paramagnetic metal material, is coated with diamagnetism metal material coating on the said paramagnetic metal material.Said paramagnetic metal material can be platinum, magnesium, aluminum or titanium.Said diamagnetism metal material can be gold, silver or bismuth.Therefore; When carrying out magnetic resonance elastography; Get into the pin cutter hub of imaging region and the diamagnetism metal material coating on the pin cutter head and can offset the magnetization of externally-applied magnetic field the paramagnetic metal material; Make paramagnetic material can not cause the distortion of field of magnetic resonance equipment, also can in scanogram, not produce artefact simultaneously.And; Because paramagnetic metal material and diamagnetism metal material all are to be made up of metallic element; Therefore can guarantee the mechanical property of pin cutter hub and pin cutter head, thereby similar physical characteristic is provided for traditional needle cutter, to satisfy the requirement of pin cutter operation.
It is thus clear that; Pin cutter provided by the invention; Magnetic resonance elastography in the time of can both carrying out pin cutter surgical operation to degree of depth tissue in the body and person of modern times surface, thus the mechanical attributes of in-vivo tissue in pin cutter surgical procedures, accurately obtained, as the operating reference of pin cutter.
On the other hand; The pin cutter of compatible magnetic resonance elastography provided by the invention has the function of surgical knife and magnetic resonance elastography stimulator, therefore in the nuclear magnetic resonance process; Having avoided biopsy needle with relevant electromechanical driver surgical operation to be produced disturbs; Also avoid sonic transducer and radio-frequency coil in magnetic resonance elastography, to produce artefact, and do not needed extra mechanical vibrator generator, thereby can reduce the treatment cost.
On the whole, the pin cutter of compatible magnetic resonance elastography provided by the invention can improve the effectiveness and the safety of pin cutter treatment.
Description of drawings
Fig. 1 is the structural representation according to the pin cutter of compatible magnetic resonance elastography of the present invention;
Fig. 2 is the cross-wise direction sketch map of pin cutter shown in Figure 1;
Fig. 3 is the enlarged diagram along the pin cutter cross section of A-A ' the line intercepting among Fig. 2;
Fig. 4 is the enlarged diagram along the pin cutter cross section of B-B ' the line intercepting among Fig. 2.
The specific embodiment
The pin cutter of compatible magnetic resonance elastography provided by the invention comprises pin cutter hub and pin cutter head, and the position near the pin cutter head comprises piezoelectric sender in the pin cutter hub, and piezoelectric sender is connected to power supply through ground wire and holding wire.When energized; Piezoelectric sender is the required mechanical vibration of magnetic resonance elastography with electrical signal conversion; Make mechanical vibration directly act on in-vivo tissue; Thereby avoided mechanical vibration decay before the degree of depth tissue in arriving body, and when carrying out magnetic resonance elastography, can not produce interference, also can in magnetic resonance elastography, not produce artefact the operation of pin cutter; Thereby in pin cutter surgical procedures, accurately obtain the mechanical attributes of in-vivo tissue, as the operating reference of pin cutter.
Describe pin cutter in detail below in conjunction with accompanying drawing according to compatible magnetic resonance elastography of the present invention.
Fig. 1 is the structural representation according to the pin cutter of compatible magnetic resonance elastography of the present invention.Referring to Fig. 1, the pin cutter of compatible magnetic resonance elastography provided by the invention comprises three major parts: pin cutter tail 1, pin cutter hub 2 and pin cutter head 3.1 place is equipped with pin cutter handle 4 at pin cutter tail, and pin cutter handle 4 can be a plastic handle.The external diameter of pin cutter hub 2 is between 1-2mm.
Describe the various piece of the pin cutter of compatible magnetic resonance elastography in detail below in conjunction with Fig. 2-Fig. 4.Fig. 2 is the cross-wise direction sketch map of pin cutter shown in Figure 1; Fig. 3 is the enlarged diagram along the pin cutter cross section of A-A ' the line intercepting among Fig. 2; And Fig. 4 is the enlarged diagram along the pin cutter cross section of B-B ' the line intercepting among Fig. 2.
The enlarged diagram in the pin cutter cross section from shown in Figure 3 along A-A ' line intercepting Fig. 2 can find out that the pin cutter hub is a hollow circular cylinder 5.Pin cutter according to the present invention is compatible with magnetic resonance.Specifically, pin cutter hub and pin cutter head are processed by the paramagnetic metal material, are coated with one deck diamagnetism metal material coating on the paramagnetic metal material.Like this; When carrying out magnetic resonance elastography; Get into the pin cutter hub of imaging region and the diamagnetism metal material coating on the pin cutter head and can offset the magnetization of externally-applied magnetic field the paramagnetic metal material; Make paramagnetic material can not cause the distortion of field of magnetic resonance equipment, also can in scanogram, not produce artefact simultaneously.And, because paramagnetic metal material and diamagnetism metal material all are to be made up of metallic element, therefore can guarantee the mechanical property of pin cutter hub and pin cutter head, to satisfy the requirement of pin cutter operation.The paramagnetic metal material can be preferably titanium for for example platinum, magnesium, aluminum or titanium elements.The diamagnetism metal material can be preferably bismuth for for example gold, silver or bismuth.In addition, pin cutter head 3 has the blade that designs for the surgical operation purpose specially.
Get back to Fig. 1, the pin cutter of compatible magnetic resonance elastography provided by the invention position near pin cutter head 3 in pin cutter hub 2 is furnished with piezoelectric sender 6, and it can be the required mechanical vibration of magnetic resonance elastography with electrical signal conversion.Piezoelectric sender 6 is connected to power supply 10 through ground wire 11 and holding wire 12.When power connection; The doctor can insert patient body with the pin cutter, and piezoelectric sender 6 is the required mechanical vibration of magnetic resonance elastography with electrical signal conversion, and mechanical vibration act on in-vivo tissue; Producing low-frequency shearing wave thus propagates in organizing in vivo; Thereby cause the in-vivo tissue particle displacement, utilize mr imaging technique to obtain phase image then, through calculating the coefficient of elasticity scattergram that obtains in-vivo tissue.The scattergram of the coefficient of elasticity that is obtained can help the doctor to discern abnormal structure, and for pin cutter therapy surgical operation the guidance of necessity is provided.
Because on the pin cutter of the present invention; Piezoelectric sender 6 is as the stimulator of magnetic resonance elastography; Be arranged in the position of pin cutter hub near the pin cutter head; Thereby can mechanical vibration be directly acted on the in-vivo tissue that the operation of pin cutter is directed against, avoided being positioned at the decay of the mechanical vibration that stimulator produced before arriving body degree of depth tissue of body surface.
Piezoelectric sender 6 can be set with the distance of pin cutter head 3 according to actual needs; It depends on the in-vivo tissue that the operation of pin cutter is directed against; Principle is to make mechanical vibration can directly act on the in-vivo tissue that the operation of pin cutter is directed against; Thereby can when not influencing the operation of pin cutter, carry out the magnetic resonance elastography of degree of depth tissue in the body, be preferably about 1cm.
In one embodiment of the invention; Width on the pin cutter length direction between the 0.5-2mm, the mechanical vibration that can produce 100-200Hz of the piezoelectric sender of external diameter between 1-2mm, can satisfy the needs that in-vivo tissue carried out magnetic resonance elastography basically.For instance; The magnetic resonance elastography of skeletal muscle needs the mechanical vibration of 100-150Hz; When the width of piezoelectric sender 6 on pin cutter length direction is 0.5mm, when external diameter is 1mm, can produces the mechanical vibration of 100Hz, it is applicable to the magnetic resonance elastography of skeletal muscle.
In conjunction with the enlarged diagram in Fig. 1 and pin cutter cross section along B-B ' line intercepting among Fig. 2 shown in Figure 4, in the more detailed embodiment of the present invention, piezoelectric sender 6 comprises: supporting layer 9; Be positioned at the piezoelectric element 7 on the supporting layer 9, being used for electrical signal conversion is mechanical vibration; And be positioned at the wearing plate 8 on the piezoelectric element 7, be used to protect piezoelectric element 7.Piezoelectric element 7 can be a piezoceramic material, or other can be the material of the required mechanical vibration of magnetic resonance elastography with electrical signal conversion, and its thickness is between 0.1-0.2mm.Wearing plate 8 can be processed by silastic material, and its thickness is between 0.05-0.1mm.Supporting layer 9 can be processed by epoxide resin material, and its thickness is between 0.2-0.3mm.
In order to guarantee the mechanical property of pin cutter, the gross thickness of piezoelectric element, wearing plate and supporting layer can be less than the gross thickness of the paramagnetic material and the antimagnetic material of pin cutter hub in the piezoelectric sender.At this moment, in order to make pin cutter surface smoothing, the surface of piezoelectric sender and pin cutter hub surface maintain an equal level, and promptly piezoelectric sender is produced on a part of metal material of pin cutter hub, thereby has guaranteed that the pin cutter has the favorable mechanical characteristic.
The pin cutter of compatible magnetic resonance elastography provided by the invention comprises pin cutter tail, pin cutter hub and pin cutter head, and the position near the pin cutter head comprises piezoelectric sender in the pin cutter hub, and piezoelectric sender is connected to power supply through ground wire and holding wire.When energized, piezoelectric sender is transformed to the required mechanical vibration of magnetic resonance elastography with electrical information, makes mechanical vibration directly act on in-vivo tissue, thereby has avoided mechanical vibration decay before the degree of depth tissue in arriving body.Therefore; Pin cutter provided by the invention; Magnetic resonance elastography in the time of can both carrying out pin cutter surgical operation to degree of depth tissue in the body and person of modern times surface, thus the mechanical attributes of in-vivo tissue in pin cutter surgical procedures, accurately obtained, as the operating reference of pin cutter.
On the other hand; The pin cutter of compatible magnetic resonance elastography provided by the invention has the function of surgical instrument and magnetic resonance elastography stimulator, therefore in the nuclear magnetic resonance process; Having avoided biopsy needle with relevant electromechanical driver surgical operation to be produced disturbs; Thereby avoided that also magnetic resonance elastography is produced artefact and in the MRI that obtains, produced illusion, and do not needed extra mechanical wave generator, thereby can reduce to treat cost.On the whole, the pin cutter of compatible magnetic resonance elastography provided by the invention can improve the effectiveness and the safety of pin cutter treatment.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the pin cutter of a compatible magnetic resonance elastography comprises pin cutter hub and pin cutter head, it is characterized in that, the position near said pin cutter head in said pin cutter hub also comprises piezoelectric sender, and said piezoelectric sender is connected to power supply through ground wire and holding wire.
2. pin cutter according to claim 1 is characterized in that, the surface of the surface of said piezoelectric sender and said pin cutter hub maintains an equal level.
3. pin cutter according to claim 1 is characterized in that, the width of said piezoelectric sender on the length direction of said pin cutter is between 0.5-2mm.
4. pin cutter according to claim 1 is characterized in that, the distance of said piezoelectric sender and said pin cutter head is 1cm.
5. pin cutter according to claim 1 is characterized in that, said piezoelectric sender comprises supporting layer, is positioned at the piezoelectric element on the said supporting layer and is positioned at the wearing plate on the said piezoelectric element.
6. pin cutter according to claim 5 is characterized in that said supporting layer is processed by epoxide resin material, and thickness is between 0.2-0.3mm.
7. pin cutter according to claim 5 is characterized in that said piezoelectric element is a piezoceramic material, and thickness is between 0.1-0.2mm.
8. pin cutter according to claim 5 is characterized in that said wearing plate is processed by silastic material, and thickness is between 0.05-0.1mm.
9. pin cutter according to claim 1 is characterized in that, said pin cutter hub is processed by the paramagnetic metal material, is coated with diamagnetism metal material coating on the said paramagnetic metal material.
10. pin cutter according to claim 9 is characterized in that, said paramagnetic metal material is platinum, magnesium, aluminum or titanium.
11. pin cutter according to claim 9 is characterized in that, said diamagnetism metal material is gold, silver or bismuth.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102160929A CN102309355A (en) | 2010-06-30 | 2010-06-30 | Acupotomy compatible with magnetic resonance elastography |
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| CN2010102160929A CN102309355A (en) | 2010-06-30 | 2010-06-30 | Acupotomy compatible with magnetic resonance elastography |
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| CN102309355A true CN102309355A (en) | 2012-01-11 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030065267A1 (en) * | 2001-09-28 | 2003-04-03 | Scimed Life Systems, Inc. | Systems and methods for magnetic resonance imaging elastography |
| CN101708123A (en) * | 2009-10-28 | 2010-05-19 | 上海理工大学 | Magnetic resonance elastography detection system of liver fibrosis classification research and method thereof |
| CN101711700A (en) * | 2008-10-06 | 2010-05-26 | 西门子公司 | Magnetic resonance imaging (MRI) compatible needle knife |
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- 2010-06-30 CN CN2010102160929A patent/CN102309355A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030065267A1 (en) * | 2001-09-28 | 2003-04-03 | Scimed Life Systems, Inc. | Systems and methods for magnetic resonance imaging elastography |
| CN101711700A (en) * | 2008-10-06 | 2010-05-26 | 西门子公司 | Magnetic resonance imaging (MRI) compatible needle knife |
| CN101708123A (en) * | 2009-10-28 | 2010-05-19 | 上海理工大学 | Magnetic resonance elastography detection system of liver fibrosis classification research and method thereof |
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Application publication date: 20120111 |