CN205246849U - A multichannel RF coil device for magnetic resonance imaging system - Google Patents
A multichannel RF coil device for magnetic resonance imaging system Download PDFInfo
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- CN205246849U CN205246849U CN201521085919.1U CN201521085919U CN205246849U CN 205246849 U CN205246849 U CN 205246849U CN 201521085919 U CN201521085919 U CN 201521085919U CN 205246849 U CN205246849 U CN 205246849U
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Abstract
The utility model provides a multichannel RF coil device for magnetic resonance imaging system, including inner shell and coiler part, the coiler part covers the laminating and fixes on the inner shell, the inner shell is the shape of shoes, the inner shell includes tip behind shoes section of thick bamboo part, vamp part, upper of a shoe part, sole fore -end, sole mid portion, the sole. The beneficial effects of the utility model are that: the complete whole foot of cover of coiler part ability has great even district and higher SNR, the image quality preferred.
Description
Technical field
The utility model relates to MRI system (MRI), relates in particular to a kind of Multi-channel radio-frequency coil device for MRI system.
Background technology
Background technology magnetic resonance imaging system is to generate the two dimension of sample or the equipment of 3-D view according to Principle of Magnetic Resonance Imaging, in an increasingly wide range of applications in medical diagnosis field. Common magnetic resonance system generally comprises: produce the magnet of static uniform magnetic field B0, the scope of the even magnet of this static state is enough large, can cover the imaging position of patient's health; Radio system, comprises the radio-frequency sending coil that resonance occurs for excited sample, and for receiving the RF receiving coil of the resonance signal that sample sends; Gradient system, for producing gradient magnetic at sample space, being convenient to imaging coding; And computer generated image system, the signal of collecting for the treatment of RF receiving coil, is processed into and is convenient to the visual pattern that doctor observes.
In nmr imaging technique, collect with receiving coil the radiofrequency signal that sample is excited to send, after the radiofrequency signal of collecting is exaggerated, rebuild for sample image. The electrical structure of receiving coil mainly comprises the coil case of being made by conductive material, and is connected to inductance and electric capacity in coil case. In working order, receiving coil is around patient's checked position, its output impedance is mated with Back end data collecting device, and having uniform electromagnetic field in operating frequency coil inside distributes, the resonance signal of drawing has good signal to noise ratio, thereby obtains clear distortionless sample image. When in idle time of receiving coil, in off resonance state, can not disturb the work of miscellaneous equipment in transmitting coil and system.
Because the performance of Multi-channel radio-frequency coil device is very large to the performance impact of MRI system, so the quality of coil device performance is very important, and the quality of its performance is mainly two indexs:
L, homogeneity range, reach RF magnetic field and be uniformly distributed the size in the region of requirement, and this region is the bigger the better;
2, to-noise ratio, the radiofrequency signal receiving and the ratio of ambient noise, ratio more high image quality is better, and it is more clear that tissue is differentiated.
Concerning coil device itself, the main factor that affects its performance is the version of coil device, and the version generally adopting at present has:
L, saddle coil, its general shape is similar to a saddle, therefore named saddle coil. Its advantage is that the magnetic field homogeneity of coil generation is relatively good, and conversion efficiency is also higher. But, saddle coil is extremely responsive to radio frequency environment, and needs magnet symmetry, the variation that otherwise its uniformity and conversion efficiency all can be sharply. So just magnetic resonance imaging system can only be made to the comparatively cylindric or similar shape of sealing, and such shape is unaccommodated to suffering from the patient of melancholia, claustrophobia or some other similar conditions, can produce serious psychological pressure to them.
2, annulus, the advantage of this coil is to do multiple overlay structures, there is suitable advantage for approaching the imaging of human body surface histoorgan, and it is not high to the requirement of magnet shape yet, but the uniformity of annulus is bad, can be very bright near coil, the coil degree of depth relies on annulus size.
3, solenoid coil, this coil is more suitable for the field system that steady magnetic field is vertical direction, but solenoid coil is easily subject to the impact of metal object around, especially when metal object is during near solenoid coil, while exciting object to be seen, efficiency obviously reduces, and while detecting the magnetic resonance signal producing in object to be seen, conversion efficiency obviously declines.
4, birdcage coil, this coil can produce uniform transverse electric and magnetic field, is applicable to being operated in orthogonal modes, can launch yesterday and receive integrated coil, but this structure is confined to cylindrical cavity coil.
5, conspicuous nurse hertz coil, this coil advantage is to have good patient's turnover property, and coil signal intensity mainly concentrates on around coil current path, and shortcoming is that field distribution uniformity is bad, and the signal strength signal intensity that is positioned at middle section is lower.
Can know from above introduction, the different discharging modes of radio-frequency coil coil and the shape of coil are very large on the impact of radio frequency coil performance, how to discharge difform coil in radio-frequency coil and often determined the performance quality of radio-frequency coil.
Summary of the invention
In order to solve the problems of the prior art, the utility model provides a kind of Multi-channel radio-frequency coil device for MRI system of better performances.
The utility model provides a kind of Multi-channel radio-frequency coil device for MRI system, comprises inner casing and coiler part, and described coiler part covers laminating and is fixed on described inner casing; Described inner casing is the shape of shoes, and described inner casing comprises footwear cylinder part, upper portion, upper of a shoe part, sole fore-end, sole mid portion, sole rear end part.
As further improvement of the utility model, described coiler part comprises the first coil, the second coil, tertiary coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil, the 8th coil, the 9th coil, the tenth coil, the 11 coil, the tenth two coil, the tenth three-winding, the 14 coil, the 15 coil and the 16 coil, wherein, described the tenth coil, the tenth two coil, the tenth three-winding, the 15 coil are saddle coil, between every two adjacent saddle coils, all overlap; Described the tenth coil, the tenth two coil, the tenth three-winding and the 15 coil are for gathering the signal from ankle to sole position, and described the tenth coil covers sole rear end part and the upper of a shoe part of described inner casing; Described the tenth two coil, the tenth three-winding and the 15 coil are for gathering the signal at instep and toe position, described the tenth two coil and the tenth three-winding cover upper portion, upper of a shoe part, the sole center part of described inner casing, and described the 15 coil covers upper portion, upper of a shoe part and the sole fore-end of described inner casing.
As further improvement of the utility model, described the 11 coil, the 14 coil, the 16 coil are solenoid coil, and the axis direction of 3 described solenoid coils is identical; Described the 11 coil is for the auxiliary signal that gathers ankle and sole position, and described the 11 coil covers sole rear end part, upper of a shoe part and the footwear cylinder part of described inner casing; Described the 14 coil and the 16 coil are for the auxiliary signal that gathers the little joint parts such as instep and toe, described the 14 coil covers upper portion, upper of a shoe part and the sole mid portion of described inner casing, and described the 16 coil covers upper portion, upper of a shoe part and the sole fore-end of described inner casing.
As further improvement of the utility model, described the first coil, the second coil, tertiary coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil, the 8th coil, the 9th coil are annulus, between every two adjacent annuluses, all overlap; Described the first coil, the second coil, tertiary coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil, the 8th coil and the 9th coil are for gathering the signal from shank to ankle position, described the first coil, the second coil and tertiary coil cover the footwear cylinder part of inner casing, and described the 4th coil, the 5th coil, the 6th coil, the 7th coil, the 8th coil and the 9th coil cover footwear cylinder part and the upper of a shoe part of inner casing.
As further improvement of the utility model, between every two adjacent saddle coils and annulus, all overlap.
As further improvement of the utility model, described coiler part also comprises electronic component, and described electronic component is serially connected in any one in described the first coil, the second coil, tertiary coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil, the 8th coil, the 9th coil, the tenth coil, the 11 coil, the tenth two coil, the tenth three-winding, the 14 coil, the 15 coil and the 16 coil.
As further improvement of the utility model, described coiler part adopts copper strips or circuit board to make.
As further improvement of the utility model, described Multi-channel radio-frequency coil device also comprises shell, and described shell is fixedly connected with described inner casing, and coiler part is stated in described jacket residence.
The beneficial effects of the utility model are: by such scheme, coiler part can completely covers whole foot, have larger homogeneity range and higher signal to noise ratio, and image quality is better.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Fig. 2 is the structural representation of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Fig. 3 is the structural representation of the first coil of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Fig. 4 is the structural representation of the tertiary coil of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Fig. 5 is the structural representation of the 8th coil of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Fig. 6 is the structural representation of the 9th coil of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Fig. 7 is the structural representation of the tenth coil of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Fig. 8 is the structural representation of the 11 coil of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Fig. 9 is the structural representation of the tenth two coil of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Figure 10 is the structural representation of the tenth three-winding of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Figure 11 is the structural representation of the 14 coil of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Figure 12 is the structural representation of the 15 coil of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Figure 13 is the structural representation of the 16 coil of the coiler part of a kind of Multi-channel radio-frequency coil device for MRI system of the utility model.
Detailed description of the invention
Below in conjunction with brief description of the drawings and detailed description of the invention, the utility model is further illustrated.
Refer to Fig. 1,2, the utility model provides a kind of Multi-channel radio-frequency coil device for MRI system, comprises inner casing, coiler part and shell 100. Coiler part is fixed on inner casing, and shell 100 is similar to the shape of inner casing, and shell 100 is fixedly connected with inner casing, for covering coiler part.
Refer to Fig. 1,2, inner casing is designed to the shape of shoes, with the scanning position of people's pin match (conformal). Inner casing specifically can be divided into footwear cylinder part, upper portion, upper of a shoe part, sole fore-end (sole of corresponding people's pin and toe position), sole mid portion (the arch of foot position of corresponding people's pin), sole rear end part (the heel position of corresponding people's pin).
Refer to Fig. 1,2, coiler part comprises the electronic components (optionally) such as the first coil 1, the second coil 2, tertiary coil 3, the 4th coil 4, the 5th coil 5, the 6th coil 6, the 7th coil 7, the 8th coil 8, the 9th coil 9, the tenth coil the 10, the 11 coil 11, the tenth two coil 12, the tenth three-winding the 13, the 14 coil the 14, the 15 coil 15 and the 16 coil 16 and various inductance, electric capacity, electronic component is serially connected in above-mentioned any coil, and coiler part can adopt copper strips and circuit board making.
Refer to Fig. 3 to 13, the tenth coil 10, the tenth two coil 12, the tenth three-winding the 13 and the 15 coil 15 are saddle coil, and the 11 coil the 11, the 14 coil the 14 and the 16 coil 16 is solenoid coil. The axis direction of three solenoid coils is identical. The first coil 1 to the 9th coil 9 is annuluses. Between every two adjacent saddle coils and annulus, all overlap, overlapping effect is to remove mutual coupling (be total magnetic flux be zero) in overlapping region.
Refer to Fig. 3 to 13, the first coil 1 to the 11 coil 11 is for gathering the signal from shank, ankle to sole position. The shape of the first coil 1, the second coil 2, tertiary coil 3, the 4th coil 4, the 5th coil 5, the 6th coil 6, the 7th coil 7 is close, the first coil 1 to tertiary coil 3 covers the footwear cylinder part of inner casing, the 4th coil 4 to the 9th coil 9 covers footwear cylinder part and the upper of a shoe part of inner casing, and the tenth coil 10 covers sole rear end part and the upper of a shoe part of inner casing.
Refer to Fig. 3 to 13, the tenth two coil 12, the tenth three-winding the 13 and the 15 coil 15 are for gathering the signal at instep and toe position. The tenth two coil 12 covers upper portion, the sole center part of inner casing, and the tenth three-winding 13 covers upper of a shoe part, the sole center part of inner casing, and the 15 coil 15 covers upper portion, upper of a shoe part and the sole fore-end of inner casing.
Refer to Fig. 3 to 13, the tenth coil 10 is for the auxiliary signal that gathers ankle and sole position, and the tenth coil 10 covers sole rear end part, upper of a shoe part and the footwear cylinder part of inner casing.
Refer to Fig. 3 to 13, the 14 coil 14 and the 16 coil 16 are for the auxiliary signal that gathers the little joint parts such as instep and toe, the 14 coil 14 covers upper portion, upper of a shoe part and the sole mid portion of inner casing, and the 16 coil 16 covers upper portion, upper of a shoe part and the sole fore-end of inner casing.
In imaging process, Multi-channel radio-frequency coil device of the present utility model is covered on people's pin, can carry out scanning imagery to people's pin.
Exciting and receiving all of RF magnetic field completed by radio-frequency coil. For receiving coil, it is vital improving signal to noise ratio. In general, less coil and more close imaging object can obtain higher signal to noise ratio. In order to cover larger imaging region, need to use multiple coils around whole imaging object. Coil device of the present utility model has met above-mentioned requirements, and can completely covers whole foot, has larger homogeneity range and higher to-noise ratio, and image quality is better.
Above content is in conjunction with concrete preferred embodiment further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations. For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (8)
1. for a Multi-channel radio-frequency coil device for MRI system, it is characterized in that: comprise inner casing and coiler part, described coiler part covers laminating and is fixed on described inner casing; Described inner casing is the shape of shoes, and described inner casing comprises footwear cylinder part, upper portion, upper of a shoe part, sole fore-end, sole mid portion, sole rear end part.
2. the Multi-channel radio-frequency coil device for MRI system according to claim 1, it is characterized in that: described coiler part comprises the first coil, the second coil, tertiary coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil, the 8th coil, the 9th coil, the tenth coil, the 11 coil, the tenth two coil, the tenth three-winding, the 14 coil, the 15 coil and the 16 coil, wherein, described the tenth coil, the tenth two coil, the tenth three-winding, the 15 coil is saddle coil, between every two adjacent saddle coils, all overlap, described the tenth coil, the tenth two coil, the tenth three-winding and the 15 coil are for gathering the signal from ankle to sole position, and described the tenth coil covers sole rear end part and the upper of a shoe part of described inner casing, described the tenth two coil, the tenth three-winding and the 15 coil are for gathering the signal at instep and toe position, described the tenth two coil and the tenth three-winding cover upper portion, upper of a shoe part, the sole center part of described inner casing, and described the 15 coil covers upper portion, upper of a shoe part and the sole fore-end of described inner casing.
3. the Multi-channel radio-frequency coil device for MRI system according to claim 2, it is characterized in that: described the 11 coil, the 14 coil, the 16 coil are solenoid coil, and the axis direction of 3 described solenoid coils is identical; Described the 11 coil is for the auxiliary signal that gathers ankle and sole position, and described the 11 coil covers sole rear end part, upper of a shoe part and the footwear cylinder part of described inner casing; Described the 14 coil and the 16 coil are for the auxiliary signal that gathers the little joint parts such as instep and toe, described the 14 coil covers upper portion, upper of a shoe part and the sole mid portion of described inner casing, and described the 16 coil covers upper portion, upper of a shoe part and the sole fore-end of described inner casing.
4. the Multi-channel radio-frequency coil device for MRI system according to claim 2, it is characterized in that: described the first coil, the second coil, tertiary coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil, the 8th coil, the 9th coil are annulus, between every two adjacent annuluses, all overlap; Described the first coil, the second coil, tertiary coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil, the 8th coil and the 9th coil are for gathering the signal from shank to ankle position, described the first coil, the second coil and tertiary coil cover the footwear cylinder part of inner casing, and described the 4th coil, the 5th coil, the 6th coil, the 7th coil, the 8th coil and the 9th coil cover footwear cylinder part and the upper of a shoe part of inner casing.
5. the Multi-channel radio-frequency coil device for MRI system according to claim 4, is characterized in that: between every two adjacent saddle coils and annulus, all overlap.
6. the Multi-channel radio-frequency coil device for MRI system according to claim 2, it is characterized in that: described coiler part also comprises electronic component, described electronic component is serially connected in any one in described the first coil, the second coil, tertiary coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil, the 8th coil, the 9th coil, the tenth coil, the 11 coil, the tenth two coil, the tenth three-winding, the 14 coil, the 15 coil and the 16 coil.
7. the Multi-channel radio-frequency coil device for MRI system according to claim 1, is characterized in that: described coiler part adopts copper strips or circuit board to make.
8. the Multi-channel radio-frequency coil device for MRI system according to claim 1, it is characterized in that: described Multi-channel radio-frequency coil device also comprises shell, described shell is fixedly connected with described inner casing, and coiler part is stated in described jacket residence.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105487029A (en) * | 2015-12-23 | 2016-04-13 | 深圳市特深电气有限公司 | Multichannel radio frequency coil device for NMR imaging system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105487029A (en) * | 2015-12-23 | 2016-04-13 | 深圳市特深电气有限公司 | Multichannel radio frequency coil device for NMR imaging system |
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Address after: 518107 area 301c, building 201, 301, 501, 5, building 4, Jihui mould Industrial Park, Tianliao Avenue, Tianliao community, Yutang street, Guangming District, Shenzhen City, Guangdong Province Patentee after: Shenzhen RF Tech Co., Ltd. Address before: 518132 Guangdong province Shenzhen Guangming New District Gongming street community Tianliao Juhui mould Industrial Park 4 2 floor Patentee before: Shenzhen RF Tech Co., Ltd. |