CN205787068U - Magnet apparatus and multi-modality imaging equipment for nuclear magnetic resonance - Google Patents
Magnet apparatus and multi-modality imaging equipment for nuclear magnetic resonance Download PDFInfo
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- CN205787068U CN205787068U CN201620480252.3U CN201620480252U CN205787068U CN 205787068 U CN205787068 U CN 205787068U CN 201620480252 U CN201620480252 U CN 201620480252U CN 205787068 U CN205787068 U CN 205787068U
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Abstract
This utility model provides the magnet apparatus for nuclear magnetic resonance and multi-modality imaging equipment, magnet apparatus includes main field coil, gradient coil and body transmitting coil, described gradient coil is arranged at inside described main field coil, described body transmitting coil is arranged at inside described gradient coil, it is characterized in that, the first screen layer and secondary shielding layer it is provided with between described gradient coil and described body transmitting coil, described first screen layer is near described body transmitting coil, and described secondary shielding layer is near described gradient coil；Described body transmitting coil includes two end ring, is arranged at wire between two end ring, and said two end ring is arranged between the first screen layer, secondary shielding layer.
Description
Technical field
This utility model relates to medical imaging field, particularly relates to a kind of magnet apparatus for nuclear magnetic resonance and many
Modality imaging system.
Background technology
In MR imaging apparatus, owing to birdcage coil has good field uniformity, it is common to use at body transmitting coil
In design, birdcage coil is basically divided into Low-Pass Filter, high-pass type and high low pass mixed type three class.Birdcage coil likeness in form birdcage,
It is made up of two ends metal ring and middle N root metal leg.The capacitive load of Low-Pass Filter birdcage coil is positioned at the centre of every lower limb；High
The capacitive load of flow-through birdcage coil is positioned on the becket at two ends；The capacitive load of high low pass mixed type birdcage coil is between lower limb
All can exist with on end ring.High-pass type birdcage coil has the convenient advantage of feed compared with Low-Pass Filter.
High pass birdcage coil, electric capacity is concentrated mainly on two end ring, has the toroidal current can be to birdcage body on end ring in addition
Transmitting coil produces following adverse effect.
1) on the one hand because electric capacity has the effect collecting electric charge, therefore upper charge concentration on end ring, surrounding electric field is very big,
Cause the arch-criminal that local SAR value exceeds standard often；
2) due to the existence of end ring toroidal current, can produce a magnetic field axially in body transmitting coil, this is
Cause the main cause of body transmitting coil Magnetic field inhomogeneity；
3) very big due to end ring peripheral electromagnetic field, the when of being used in combination with local surfaces receiving coil, distance end ring ratio
Nearer receiving coil, couples with transmitting coil strongly, and on the one hand this can cause body transmitting coil duty to change, separately
One aspect can cause the breaking-up of receiving coil.
It addition, need to increase pet detector mould between birdcage transmitting coil oscillator and shielding in PET-MR designs
Block, destroys the symmetry on coil space.Also there is technical scheme, pet detector module is added on radio shielding
Between layer and gradient coil, but it is considered that so need to add one layer of sleeve additionally serving as pasting radio shielding layer, a side
Face can cause waste spatially, the sleeve of the extra interpolation of still further aspect this layer fix in space aspect all be difficult to solve.
Utility model content
In order to solve the problems referred to above, the utility model proposes a kind of magnet apparatus for nuclear magnetic resonance.
A kind of magnet apparatus for nuclear magnetic resonance, including main field coil, gradient coil and body transmitting coil, institute
State that gradient coil is arranged at inside described main field coil, described body transmitting coil is arranged at inside described gradient coil, in institute
Stating and be provided with the first screen layer and secondary shielding layer between gradient coil and described body transmitting coil, described first screen layer leans on
Nearly described body transmitting coil, described secondary shielding layer is near described gradient coil；Described body transmitting coil include two end ring with
And it being arranged at wire between two end ring, said two end ring is arranged between the first screen layer, secondary shielding layer.
Preferably, described end ring is launched to the distance of described body transmitting coil central axis more than described wire to described body
The distance of hub of a spool axis, described end ring and described wire are carried out physical separation by described first screen layer.
Preferably, described end ring is provided with one or several end ring electric capacity.
Preferably, the length of described first screen layer is more than or equal to the length of described body transmitting coil.
Preferably, described first screen layer is provided with perforate on the position of described end ring, and described perforate is used for accommodating
Described end ring and the connecting line of described wire.
Preferably, including a bracer, described bracer is affixed on described first screen layer, and described end ring is arranged at described support
Block upper surface.
Preferably, including RF cable and radio-frequency feed port, it is arranged at described bracer upper surface, for described
End ring is powered.
Preferably, described secondary shielding laminating is in the inwall of described gradient coil.
Preferably, the axial length of described first screen layer is less than the axial length of secondary shielding layer.
This utility model additionally provides a kind of multi-modality imaging equipment.Described multi-modality imaging equipment includes as above
For the magnet apparatus of nuclear magnetic resonance, further, also include that positron emission fault shows detector module, described positron
Emission tomography display detector module is arranged between described first screen layer and secondary shielding layer.
Compared with prior art, technical advantage of the present utility model:
1, being arranged on by end ring between two screen layers, one solves the impact for SAR value of the end ring electric capacity；Its two solution
The magnetic field that end ring of having determined the produces impact on the inhomogeneities of axial field；It three solves under state is used in combination, to part
Adverse effect near the receiving coil of end ring.
2, in multi-modality imaging, PET module is arranged between two screen layers, solves PET mould in prior art
The block interference to body transmitting coil, improves the uniformity at body launching site, the most largely shields body transmitting coil simultaneously
The electromagnetic field interference to PET module.
Accompanying drawing explanation
Fig. 1 is the cross-sectional structure schematic diagram of the magnet apparatus for nuclear magnetic resonance；
Fig. 2 is the cross-sectional view of the magnet apparatus for nuclear magnetic resonance；
Fig. 3 is the partial structurtes schematic diagram of the magnet apparatus for nuclear magnetic resonance；
Fig. 4 is the structural representation of a kind of multi-modality imaging equipment.
Detailed description of the invention
Elaborate a lot of detail in the following description so that fully understanding this utility model.But this practicality is new
Type can be implemented to be much different from alternate manner described here, and those skilled in the art can be new without prejudice to this practicality
Doing similar popularization in the case of type intension, therefore this utility model is not limited by following public being embodied as.
Secondly, this utility model utilizes schematic diagram to be described in detail, when describing this utility model embodiment in detail, for ease of
Illustrating, described schematic diagram is example, and it should not limit the scope of this utility model protection at this.
As it is shown in figure 1, this utility model provides a kind of magnet apparatus for nuclear magnetic resonance, including main field coil
(not shown), gradient coil 31 and body transmitting coil 32, described gradient coil 31 is arranged at inside described main field coil, institute
State body transmitting coil 32 and be arranged at the inner side of described gradient coil 31, described gradient coil 31 and described body transmitting coil 32 it
Between be provided with the first screen layer 35 and secondary shielding layer 36, described first screen layer 35 is near described body transmitting coil 32, institute
State secondary shielding layer 36 near described gradient coil 31.In one embodiment, described secondary shielding layer 36 is affixed on described gradient
The inwall (illustrating here, the cross section of the magnet apparatus described in Fig. 1 is positioned at the position in the middle part of body coil) of coil 31.
In one embodiment, the axial length of described first screen layer is less than the axial length of secondary shielding layer.Separately
In one embodiment, the length of described first screen layer 35 is more than or equal to the length of described body transmitting coil 32.
As in figure 2 it is shown, described body transmitting coil 32 includes two end ring 321, is arranged at wire 322 between two end ring,
Said two end ring 321 is arranged between the first screen layer 35, secondary shielding layer 36.
Described end ring 321 is sent out to described body to distance A of described body transmitting coil 32 central axis more than described wire 322
Distance B of ray circle 32 central axis.Described end ring 321 is carried out physics with described wire 322 and divides by described first screen layer 35
Every.
As it is shown on figure 3, described first screen layer is provided with perforate 40 on the position of described end ring, described perforate 40 is used
In the connecting line 323 accommodating described end ring 321 (only illustrating the end ring of side) and shown wire 322.
Described magnet apparatus also includes much propping up bracer 37, is used for supporting the assemblies such as screen layer, end ring and wire.Such as figure
Shown in 3, described first screen layer 35 is arranged at the upper surface of bottom support block 37 (1), and the both sides of described first screen layer 35 set
Being equipped with a bracer 37 (2), described end ring 321 is arranged at the upper surface of described bracer 37 (2).In certain embodiments, described
One or several end ring electric capacity (not shown) for tunning effect it is provided with on end ring 321.
Owing to using high pass birdcage coil, therefore radio-frequency feed point is on end ring, and DC feedback point is distributed in described end ring
Between wire on.As it is shown on figure 3, the upper surface at a bracer 37 (2) is provided with radio-frequency feed port and RF cable 38,
It is connected with described end ring 321, for powering to described end ring 321.Bracer 37 (1) be provided with direct current supply port with
And cable 39, for powering to described wire.
As shown in Figure 4, this utility model also proposes a kind of multi-modality imaging equipment, and described multi-modality imaging equipment 5 includes
For the magnet apparatus of nuclear magnetic resonance, specifically include that main field coil 50 (not shown), gradient coil 51 and body are sent out
Ray circle 52, described gradient coil 51 is arranged at inside described main field coil 50, described body transmitting coil 52 is arranged at described
The inner side of gradient coil 51, is provided with the first screen layer 55 and between described gradient coil 51 and described transmitting coil 52
Two screen layers 56, described first screen layer 55 near described body transmitting coil 52 (hoop section not shown in figure), described second
Screen layer 56 is near described gradient coil 51.In one embodiment, described secondary shielding layer 56 is affixed on described gradient coil 51
Inwall.Described multimodal device includes further, also includes that positron emission fault shows (Positron Emission
Tomography, PET) detector module 57, described positron emission fault display detector module is arranged at described first screen
Cover between layer 55 and secondary shielding layer 56.
Although this utility model is open as above with preferred embodiment, but it is not for limiting this utility model, appoints
What those skilled in the art, without departing from spirit and scope of the present utility model, may be by method and the skill of the disclosure above
Technical solutions of the utility model are made possible variation and amendment by art content, therefore, every without departing from this utility model technology
The content of scheme, any simple modification above example made according to technical spirit of the present utility model, equivalent variations and
Modify, belong to the protection domain of technical solutions of the utility model.
Claims (10)
1. for a magnet apparatus for nuclear magnetic resonance, including main field coil, gradient coil and body transmitting coil, described
Gradient coil is arranged at inside described main field coil, described body transmitting coil is arranged at inside described gradient coil, its feature
It is, between described gradient coil and described body transmitting coil, is provided with the first screen layer and secondary shielding layer, described
One screen layer is near described body transmitting coil, and described secondary shielding layer is near described gradient coil；Described body transmitting coil includes
Two end ring and be arranged at wire between two end ring, said two end ring is arranged in the first screen layer, secondary shielding layer
Between.
2. the magnet apparatus for nuclear magnetic resonance as claimed in claim 1, it is characterised in that described end ring to described body is sent out
The distance of ray circle central axis is more than the distance of described wire to described body transmitting coil central axis, described first screen layer
Described end ring and described wire are carried out physical separation.
3. the magnet apparatus for nuclear magnetic resonance as claimed in claim 1, it is characterised in that be provided with on described end ring
Individual or several end ring electric capacity.
4. the magnet apparatus for nuclear magnetic resonance as claimed in claim 1, it is characterised in that the length of described first screen layer
Degree is more than or equal to the length of described body transmitting coil.
5. the magnet apparatus for nuclear magnetic resonance as claimed in claim 1, it is characterised in that described first screen layer is neighbouring
Being provided with perforate on the position of described end ring, described perforate is for accommodating the connecting line of described end ring and described wire.
6. the magnet apparatus for nuclear magnetic resonance as claimed in claim 5, it is characterised in that include a bracer, described
Bracer is affixed on described first screen layer, and described end ring is arranged at described bracer upper surface.
7. the magnet apparatus for nuclear magnetic resonance as claimed in claim 6, it is characterised in that include RF cable and penetrate
Frequently feed port, is arranged at described bracer upper surface, for powering to described end ring.
8. the magnet apparatus for nuclear magnetic resonance as claimed in claim 1, it is characterised in that described secondary shielding laminating in
The inwall of described gradient coil.
9. the magnet apparatus for nuclear magnetic resonance as claimed in claim 1, it is characterised in that the axle of described first screen layer
The axial length of secondary shielding layer it is less than to length.
10. a multi-modality imaging equipment, described multi-modality imaging equipment includes becoming for magnetic resonance as described in claim 1-9
The magnet apparatus of picture, it is characterised in that also include that positron emission fault shows detector module, described positron emission fault
Display detector module is arranged between described first screen layer and secondary shielding layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620480252.3U CN205787068U (en) | 2016-05-24 | 2016-05-24 | Magnet apparatus and multi-modality imaging equipment for nuclear magnetic resonance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620480252.3U CN205787068U (en) | 2016-05-24 | 2016-05-24 | Magnet apparatus and multi-modality imaging equipment for nuclear magnetic resonance |
Publications (1)
| Publication Number | Publication Date |
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| CN205787068U true CN205787068U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620480252.3U Active CN205787068U (en) | 2016-05-24 | 2016-05-24 | Magnet apparatus and multi-modality imaging equipment for nuclear magnetic resonance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203968A (en) * | 2021-04-27 | 2021-08-03 | 上海辰光医疗科技股份有限公司 | Magnetic resonance transmitting coil structure with high transmitting efficiency |
-
2016
- 2016-05-24 CN CN201620480252.3U patent/CN205787068U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203968A (en) * | 2021-04-27 | 2021-08-03 | 上海辰光医疗科技股份有限公司 | Magnetic resonance transmitting coil structure with high transmitting efficiency |
| CN113203968B (en) * | 2021-04-27 | 2024-02-02 | 上海辰光医疗科技股份有限公司 | Magnetic resonance transmitting coil structure with high transmitting efficiency |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201807 No. 2258 Chengbei Road, Jiading Industrial Zone, Jiading District, Shanghai. Patentee after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201807 No. 2258 Chengbei Road, Jiading Industrial Zone, Jiading District, Shanghai. Patentee before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |