CN102579046A

CN102579046A - Breast coil device

Info

Publication number: CN102579046A
Application number: CN201210067112XA
Authority: CN
Inventors: 章勇勤; 宋怡彪; 刘新; 邱本胜; 郑海荣; 张成祥; 苗卉; 潘艳丽
Original assignee: Shenzhen Institute of Advanced Technology of CAS
Current assignee: Shenzhen Institute of Advanced Technology of CAS
Priority date: 2011-12-12
Filing date: 2012-03-14
Publication date: 2012-07-18
Anticipated expiration: 2032-03-14
Also published as: CN102579046B

Abstract

A breast coil device comprises a shell and two coil groups. The shell is made of magnetic compatible materials and comprises a web plate, a bottom plate and at least three supporting columns; two first round holes are arranged on a surface of the web plate; one end of each supporting column is fixed on the bottom plate, the other end of each supporting column is connected onto the web plate, and the supporting columns, the web plate and the bottom plate jointly form a cage structure. The two coil groups are respectively fixed on the web plate and are arranged in the cage structure. Each coil group comprises a first coil, a second coil and at least two leads; the first coils and the second coils are annular roughly, and the first coils are fixed on the web plate; the diameter of each second coil is smaller than that of each first coil; and each first coil is connected with the corresponding second coil via the corresponding leads, and the first round holes on the web plate, the first coils, the second coils and the leads form a holding cavity. The breast coil device meets requirements of a magnetic resonance imaging system.

Description

The breast coil device

[technical field]

The present invention relates to magnetic resonance device, particularly relate to a kind of breast coil device.

[background technology]

At present, malignant tumor and chronic disease such as cardiovascular and cerebrovascular disease and malignant neoplasm have become the No.1 killer who threatens human health.Breast carcinoma is the modal malignant tumor of female mammary gland, also is one of modal malignant tumor of women, has a strong impact on women's physical and mental health even threat to life, and the mammary gland tumor modal symptom that is breast carcinoma.According to statistics, breast cancer incidence accounts for the 7-10% of the various malignant tumor of human body whole body, and sickness rate shows the trend increase year by year, in the women, is only second to cervical cancer, and is normal and hereditary relevant, and rarely found among the male.The breast carcinoma lump is usually located at the outer top and the centre of breast, and axillary fossa place lymph node is a breast carcinoma metastasis site the earliest.Reduce an inspection that potential important measures are infantile tumours of breast carcinoma mortality rate.American Cancer Society report is in when early stage when breast carcinoma comes to light, and 96% women can survive.Unfortunately, 25% of the discovery in late period women can not be survived.

Now, the breast aortography is the most effective and widely used screening mode of the potential breast carcinoma of clinical examination.Yet, the breast carcinoma female patient, it is negative to find that through Mammogram about 10-30% shows.A large amount of false-negative obtaining possibly visited near the fine and close gland tissue of thoracic wall or oxter and the limitation in zone owing to the breast aortography, and the infantile tumour imaging does not also show micro-calcification.Another important worry is the pseudo-male height ratio relevant with Mammogram.These limitation show to have high sensitivity and effective specific complementary imaging pattern of early diagnosis clearly.

Mr imaging technique is proved to be a kind of of great value imaging mode in the mammary neoplasms inspection.Yet; From body local zone (for example female breast) when obtaining high sensitivity and specific high-definition picture; The existing commercial magnetic resonance imaging system efficient of annular gradient coil and radio-frequency coil that contains large-size is lower; Can't satisfy the demand of diagnosis, need the appearance of the special-purpose coil of high-performance that adapts with it.

[summary of the invention]

Based on this, be necessary to provide a kind of breast coil device that is specially adapted for magnetic resonance imaging system.

A kind of breast coil device comprises shell and two coil groups.Said shell is processed by the magnetic compatible material, comprises web, base plate and at least three support columns; The plate face of said web is provided with two first circular holes; Said support column one end is fixed on the said base plate, and the other end is connected on the said web, and said support column and said web and said base plate form cage structure jointly.Said two coil groups are individually fixed on the said web and are contained in the said cage structure, comprise first coil, second coil and at least two leads; Said first coil and second coil are roughly annular, and said first coil stationary is on said web; Said second coil diameter is less than first coil; Said first coil is connected with said second coil through said lead, and first circular hole on the said web and said first coil, said second coil and said lead have formed a host cavity.

Further, said lead is the arc lead, and said host cavity is roughly hemispherical.

Further, the quantity of the lead of said single coil group is 2 or 4.

Further, the junction point that said lead is positioned on first coil is evenly distributed on first coil, and the junction point that said lead is positioned on second coil is evenly distributed on second coil.

Further, said web is recessed to the direction near said base plate, forms concave shape.

Further, said base plate is provided with two second circular holes.

Further, said shell also comprises the connecting portion with web and base plate smooth connection.

Further, said coil groups also comprises many root interface lead-in wires, and service wire quantity equates that with said number of conductors said service wire is connected on first coil, and coil groups is divided into a plurality of radio-frequency channels, and the number of radio-frequency channel equates with the number of said lead.

Further, said coil groups also comprises a plurality of first capacitors that are connected on first coil, and said a plurality of first capacitors are used to realize the impedance matching of coil unit.

Further, also be connected with second capacitor between said two coil groups, said second capacitor is used to eliminate the coupling between said two coil groups.

The magnetic resonance system of the existing radio-frequency coil of above-mentioned breast coil device solves can't satisfy the problem of mammary neoplasms inspection diagnostic requirements, is applicable to magnetic resonance imaging system.Simultaneously good human engineering design makes the user more comfortable.

[description of drawings]

Fig. 1 is the structural representation of breast coil device;

Fig. 2 is the concrete structure sketch map of shell;

Fig. 3 is a single coil group structural representation;

Fig. 4 is the concrete structure sketch map of a kind of embodiment of coil groups;

Fig. 5 is the concrete structure sketch map of the another kind of embodiment of coil groups.

[specific embodiment]

For the magnetic resonance system that solves existing radio-frequency coil can't satisfy the problem that mammary neoplasms is checked diagnostic requirements, a kind of breast coil device that is specially adapted for magnetic resonance imaging system has been proposed.

MR imaging apparatus comprises parts such as magnet, examinating couch, gradient coil, radio-frequency receiving-transmitting coil, surface coils, preamplifier, frequency mixer, radio frequency amplifier, analog-digital converter, frequency synthesizer, pulse generator, digital to analog converter, radio-frequency modulator, radio frequency amplifier, gradient amplifier and processor.The examine person that magnet, gradient coil and radio-frequency coil lie in sick bed around crouching arranges that surface coils is placed on the area-of-interest at a certain position of examine person.The whole MR imaging apparatus of computer operating; The shape of at first computer control radiofrequency signal, gradient and excite sequential; And it is delivered in the waveform generator, signal gets into transmitting coil and gradient coil respectively after amplifying, be received coil from the radiating electromagnetic wave of interesting target and transform the signal of telecommunication; Through amplifier and demodulator circuit; The digital signal that is collected by analog-digital converter is admitted to computer, utilizes Fourier transformation to realize image reconstruction, finally obtains the MRI of target.

See also Fig. 1, a kind of breast coil device of embodiment one comprises shell 100 and is contained in two coil groups 200 in the shell 100 that shell 100 is processed by the magnetic compatible material, disturbs to satisfy under electromagnetic radiation, can not produce magnetic resonance system.Shell 100 comprises web 110, base plate 130 and four support columns 150, and support column 150 1 ends are fixed on the base plate 130, and the other end is connected on the web 110, support column 150 and web 110 and the base plate 130 common cage structures (figure is mark not) that form.Two coil groups 200 are individually fixed on the web 110 and are contained in the cage structure.

Shell 100 more detailed structures are as shown in Figure 2, and web 110 forms concave shape to recessed near the direction of base plate 130.The plate face of web 110 is provided with two first circular holes 112, and the aperture of circular hole is enough big, can its breast be put into the hole to satisfy the normal adult women.It is also corresponding on the base plate 130 that to be provided with two second circular holes, 132, the second positions of circular hole 132 on shell 100 corresponding with first circular hole 112.Shell 100 also comprises connecting portion 170, connecting portion 170 and web 110 and base plate 130 smooth connections.Base plate 130 is away from also being provided with projection 134 on the one side of web 110; When the The entire breast coil device was placed on the magnetic resonance system examinating couch, web 110 was last, base plate 130 infra; Projection 134 contacts with the bed surface of examinating couch, and whole device is played support fixation.When examine person will do inspection, need examine person that its chest is prostrate on the breast coil device, the web 110 of concave shape can well adapt to the profile characteristics of human chest.Connecting portion 170 and web 110 and base plate 130 smooth connections make the examiner more comfortable, and connecting portion 170 also plays a supportive role to the The entire breast coil device simultaneously.

Two coil groups 200 are individually fixed on the web 110 and are contained in the cage structure, see also Fig. 3, and coil groups 200 comprises first coil 210, second coil 230 and four leads 250.First coil 210 is roughly annular, is fixed on the web 110.Second coil 230 also is an annular roughly, and diameter is less than first coil.First coil 210 is connected with second coil 230 through lead 250.First circular hole 112 on the web 110 and first coil 210, second coil 230 and lead 250 have formed a host cavity 300, and coil groups is connected with RF receiving circuit in the magnetic resonance system through the shielded cable of multicore.

The junction point that lead 250 is positioned on first coil 210 is evenly distributed on first coil 210, and the junction point that lead 250 is positioned on second coil 230 is evenly distributed on second coil 230.The junction point of lead on first coil 210 and second coil 230 evenly is divided into four sections with first coil 210 and second coil 230.Coil groups 200 also comprises many root interface lead-in wires (figure does not show); Service wire quantity equates that with lead 250 quantity for having the coaxial wire of anti-electromagnetic interference, service wire is connected on first coil; Rationally arrange the both positive and negative polarity of service wire; Adjacent two leads and adjacent two leads are marked off at first coil 210 one section and a section of on second coil 230, telling have been formed a radio-frequency channel jointly, and coil groups 200 is divided into four radio-frequency channels, is respectively 202,204,206 and 208.

When examine person need do breast magnetic resonance scanning; The breast coil device is placed on the examinating couch of magnetic resonance system; Examine person is prostrate prostrate on the breast coil device with its chest; Examine person's cleavage is in the middle part of web 110, and breast passes first circular hole 112, gets into host cavity 300.At this moment, the both sides breast is centered on by two coil groups 200 respectively, and second coil 230 is near nipple, and first coil 210 is more near breast root.Then under the control of computer, examine person sent into carry out image scanning in the magnetic resonance equipment.The magnetic resonance system of the existing radio-frequency coil of above-mentioned breast coil device solves can't satisfy the problem of mammary neoplasms inspection diagnostic requirements, is applicable to magnetic resonance imaging system.Simultaneously good human engineering design makes the user more comfortable.

The quantity of support column 150 is not limited to 4 in the The entire breast coil device; Require at least three; So just can satisfy the requirement of supporting, the quantity of support column is not too many as far as possible simultaneously, only uses 3 or 4 support columns; Make the breast coil device have open architecture, be convenient in to breast scanning, it carried out interventional therapy from a plurality of directions.

The number that it should be noted that lead 250 is not limited to 4, also can be 2 or other number.In single coil group 200, the number of radio-frequency channel equates with the number of lead 250, if lead 250 numbers are 2, then the quantity of radio-frequency channel also is 2.Lead 250 can be the arc lead, and the shape of host cavity 300 is roughly hemispherical like this, and is proper mutually with women's chest shape facility, is that examine person is more comfortable.Second circular hole 132 also can save, and the volume that second circular hole 132 can further increase host cavity 300 is set.

See also Fig. 4; Among one embodiment in two coil groups 200 the single coil group also comprise 4 first capacitors 410 that are connected on first coil 210; First capacitor 410 is connected the junction of the service wire and first coil 210; Through regulating the capacitance size of first capacitor 410, be used to realize the impedance matching of coil unit.Two coil groups 200 are mutually independent, and in order to eliminate the coupling of 200 of two coil groups, two 200 of coil groups also are connected with two second capacitors 430, eliminate the coupling of 200 of two coil groups through the capacitance size of regulating second capacitor 430.

See also Fig. 5, two coil groups 200 among another embodiment, the single coil group is connected with another coil groups through the 3rd capacitor 450, through the method for two coil groups 200 shared one the 3rd capacitors 450, eliminates the coupling between the coil groups 200.

It is pointed out that in single coil group 200 can also be connected with a plurality of the 4th type of capacitors (figure does not show) on first coil 210 and second coil 230, quantity is that 4, the four types of capacitors are evenly distributed on first coil 210 and second coil 230.Can also be connected with the 5th type of capacitor (figure does not show) on the lead 250, quantity is identical with lead 250 quantity.The 4th type of capacitor and the 5th type of capacitor are used for the tuning of coil groups 200 coils; Resonant frequency is adjusted to the frequency of oscillation place of magnetic resonance system defined; The 5th type of capacitor also is used in adjacent radio-frequency channel simultaneously, like the uncoupling between radio-

frequency channel

202 and 204.

The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.

Claims

1. breast coil device comprises:

Shell is processed by the magnetic compatible material, and said shell comprises:

Web, the plate face of said web is provided with two first circular holes;

Base plate; And

At least three support columns, said support column one end is fixed on the said base plate, and the other end is connected on the said web, and said support column and said web and said base plate form cage structure jointly;

Two coil groups are individually fixed on the said web and are contained in the said cage structure, and said coil groups comprises:

First coil is roughly annular, is fixed on the said web;

Second coil is roughly annular, and diameter is less than first coil; And

At least two leads, said first coil is connected with said second coil through said lead, and first circular hole on the said web and said first coil, said second coil and said lead have formed a host cavity.

2. according to the described breast coil device of claim 1, it is characterized in that said lead is the arc lead, said host cavity is roughly hemispherical.

3. according to the described breast coil device of claim 1, it is characterized in that the quantity of the lead of said single coil group is 2 or 4.

4. according to the described breast coil device of claim 3, it is characterized in that the junction point that said lead is positioned on first coil is evenly distributed on first coil, the junction point that said lead is positioned on second coil is evenly distributed on second coil.

5. according to the described breast coil device of claim 1, it is characterized in that said web is recessed to the direction near said base plate, form concave shape.

6. according to the described breast coil device of claim 1, it is characterized in that said base plate is provided with two second circular holes.

7. according to the described breast coil device of claim 1, it is characterized in that said shell also comprises the connecting portion with web and base plate smooth connection.

8. according to the described breast coil device of claim 4; It is characterized in that; Said coil groups also comprises many root interface lead-in wires, and service wire quantity equates that with said number of conductors said service wire is connected on first coil; Coil groups is divided into a plurality of radio-frequency channels, and the number of radio-frequency channel equates with the number of said lead.

9. according to the described breast coil device of claim 8, it is characterized in that said coil groups also comprises a plurality of first capacitors that are connected on first coil, said a plurality of first capacitors are used to realize the impedance matching of coil unit.

10. according to the described breast coil device of claim 9, it is characterized in that, also be connected with second capacitor between said two coil groups, said second capacitor is used to eliminate the coupling between said two coil groups.