CN207440268U - A kind of combined type denoising device - Google Patents
A kind of combined type denoising device Download PDFInfo
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- CN207440268U CN207440268U CN201621324615.0U CN201621324615U CN207440268U CN 207440268 U CN207440268 U CN 207440268U CN 201621324615 U CN201621324615 U CN 201621324615U CN 207440268 U CN207440268 U CN 207440268U
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- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The utility model discloses a kind of combined type denoising devices, include passive denoising device and active noise reducing device in the shielding of magnetic resonance imaging system for placing, active noise reducing device can in real time in detector shield noise signal, and pass through internal comparison, analysis, the noise reduction analog signal that there is opposite phase with the noise signal is generated, to offset or weaken noise signal.Patient is made to substantially reduce fear when doing nuclear magnetic resonance check, and protects the hearing of patient simultaneously.
Description
Technical field
The utility model belongs to magnetic resonance system safety protection field, and in particular to a kind of combined type denoising device.
Background technology
Magnetic resonance imaging is using nuclear magnetic resonance principle, and launched electromagnetic wave is detected by additional gradient magnetic, according to
This can be depicted as the structural images of interior of articles, and this technology is used for the imaging of body structures, just produces one kind
Revolutionary medical diagnostic tool.The application of fast-changing gradient magnetic greatly accelerates the speed of magnetic resonance imaging, makes this
Technology becomes a reality in the application of clinical diagnosis, scientific research, has greatly promoted medicine, neuro-physiology and cognition neural section
Rapid development.
In magnetic resonance examination, gradient coil can complete the space orientation to imaging object.Due to gradient coil in itself
In high-intensity magnetic field, it can be acted on after energization be subject to Lorentz force, and the imaging process of magnetic resonance is needed in gradient coil
Electric current is constantly switched fast, and will cause the vibration repeatedly of gradient coil, so as to generate noise.
Noise caused by magnetic resonance system not only influences the mood of normal person, and be also easy to cause patient it is frightened,
Irritated psychology, body are more prone to move, and then influence inspection result.
The content of the invention
The utility model is intended to provide a kind of simple, efficient magnetic resonance combined type denoising device, effectively can offset and subtract
Weak gradient coil vibrates the noise of generation repeatedly, mitigates the fear of patient, protects the hearing of patient.
A kind of combined type denoising device is fixedly installed in the shielding for placing magnetic resonance imaging system, including passively dropping
Make an uproar device and active noise reducing device, wherein, passive denoising device by be arranged between shielding surface of wall be arranged on magnetic resonance into
As the absorbing material on system body surface forms；The active noise reducing device includes active noise reducing device body and active noise reduction fills
Ancillary equipment is put, the active noise reducing device body includes signal pre-reservation module, noise analysis module and de-noising signal processing
Module is electrically connected, the active noise reduction between the signal pre-reservation module, noise analysis module and de-noising signal processing module
Device ancillary equipment include noise reduction control module, noise detection module and de-noising signal transmitting module, the noise reduction control module,
It is electrically connected between noise detection module and de-noising signal transmitting module, the active noise reducing device body and active noise reducing device are auxiliary
It helps between equipment and is electrically connected, wherein：
The noise reduction control module is arranged in the scanning system of the magnetic resonance system, for controlling the noise detection
The operation of module；
The noise detection module includes multiple microphones, is attached at the body surfaces of the magnetic resonance imaging system, uses
In the noise of real-time detection, the interior appearance of acquisition shielding during magnetic resonance imaging system works, and carry out being treated as noise
Signal, and noise signal is sent to the noise analysis module and the signal pre-reservation module by treated；
The signal pre-reservation module is used for before magnetic resonance imaging system work, is gathered and is identified between the shielding in advance
Interior noise will wherein have the noise transition of fixed frequency feature for the noise signal of fixed frequency feature and be saved in signal
Pre-reservation mould storage unit in the block, while the noise signal sent from the noise detection module is received, comparison is advance
The noise signal of preservation, identifies the noise signal of fixed frequency feature, and screens in fixed frequency characteristic noise signal by magnetic
The noise of equipment signal that resonator system generates, and noise of equipment signal is transmitted to de-noising signal processing module, while can be with
Retain the non-noise of equipment signal in fixed frequency characteristic noise signal, and work as and compared the noise pre-saved in storage unit
After signal, there is the unsaved noise signal with fixed frequency feature, signal pre-reservation module is sent gathers prompting again；
The noise analysis module extracts letter for receiving the noise signal sent from the noise detection module
The noise signal pre-saved in number pre-reservation module, distinguishes on-fixed frequecy characteristic noise signal, and filters out non-solid
Determine the noise of equipment signal generated in frequecy characteristic noise signal by magnetic resonance system, and noise of equipment signal can be transmitted to drop
Noise cancellation signal processing module, and retain the non-noise of equipment signal in on-fixed frequecy characteristic noise signal；
The noise of equipment that the de-noising signal processing module receives noise pre-reservation module and the transmission of noise analysis module comes
Signal, it is noise reduction digital signal to carry out synthesis processing, and the noise reduction digital signal that synthesis is handled well is amplified and digital-to-analogue turns
Noise reduction analog signal is changed to, generates the noise reduction analog signal that there is opposite phase with noise of equipment signal；
The de-noising signal transmitting module using multiple noise reduction horns or acoustical generator, is attached at magnetic resonance imaging system master
Wall surrounding between body surface face or shielding, for the noise reduction analog signal with opposite phase to be transmitted in shielding.
Further, the de-noising signal processing module includes noise synthin, digital-to-analogue conversion element and de-noising signal
Amplifier element, the noise synthin are electrically connected with digital-to-analogue conversion element, de-noising signal amplifier element, wherein：
The noise synthin sets for what is obtained after self noise pre-reservation module in future and noise analysis resume module
Standby noise signal synthesis processing is noise reduction digital signal；
The digital-to-analogue conversion element is used to the noise reduction digital signal after synthesizing being converted to noise reduction analog signal；
The de-noising signal amplifier element is used for the de-noising signal after synthesizing and carries out signal enhanced processing.
Further, treated that noise reduction digital signal first passes through de-noising signal amplification member for noise synthin synthesis
Part passes through digital-to-analogue conversion element again.
Further, treated that noise reduction digital signal first passes through digital-to-analogue conversion element again for noise synthin synthesis
Pass through de-noising signal amplifier element.
Further, the active noise reducing device body is arranged on the wall on the door in shielding, the magnetic resonance imaging
System is positioned near the wall on the door in shielding.
Further, the absorbing material is silica gel or silencing cotton.
Further, also contain power supply interface in the active noise reducing device, be connected with the power supply in shielding.
The utility model has the advantages that：
1. the utility model is offset using the mode that active noise reducing device and passive denoising device are combined or is weakened magnetic
The noise that resonance imaging system generates reaches and preferably offsets or weaken effect；
2. the utility model can be adapted for different environment, there is the effect of counteracting or decrease to the noise of different frequency
Fruit, and with learning functionality again, new sample can be continuously increased；
3. in the utility model magnetic resonance combined type denoising device since inside has prestored substantial amounts of noise signal, because
This can quickly offset when running into the noise signal of identical frequency or weaken the noise, reach efficient and effective purpose.
Description of the drawings
The utility model is further described with reference to the accompanying drawings and embodiments：
Fig. 1 is the structure diagram of the utility model；
Wherein：1st, between shielding；2nd, magnetic resonance imaging system body surfaces；3rd, active noise reducing device body；4th, noise detection
Module；5th, de-noising signal transmitting module.
Specific embodiment
Many details are elaborated in the following description in order to fully understand the utility model.But this practicality is new
Type can be much to implement different from other manner described here, and those skilled in the art can be new without prejudice to this practicality
Similar popularization is done in the case of type intension, therefore the utility model is from the limitation of following public specific implementation.
As shown in Figure 1, a kind of combined type denoising device, is fixedly installed in the shielding for placing magnetic resonance imaging system,
It is characterised in that it includes passive denoising device and active noise reducing device, wherein, passive denoising device is by being arranged on wall between shielding
Surface and the absorbing material composition (being to draw in figure) for being arranged on magnetic resonance imaging system body surfaces；Active noise reducing device includes
Actively make an uproar device body and active noise reducing device ancillary equipment, the active noise reducing device body include signal pre-reservation module,
Noise analysis module and de-noising signal processing module, the signal pre-reservation module, noise analysis module and de-noising signal processing
It is electrically connected between module, the active noise reducing device ancillary equipment includes noise reduction control module, noise detection module and noise reduction letter
Number transmitting module, is electrically connected, the active between the noise reduction control module, noise detection module and de-noising signal transmitting module
It is electrically connected between denoising device body and active noise reducing device ancillary equipment.
In the present embodiment, noise reduction control module is used to control the operation of noise detection module in active noise reducing device, if
It is placed in the scanning software of the magnetic resonance system, ensures that it only starts during scanning.
In the present embodiment, noise detection module includes multiple microphones, is attached at the master of the magnetic resonance imaging system
Body surface face for whether there is noise signal in detector shield, and gathers its noise signal, and progress analog-to-digital conversion is noise number
Word signal；By treated, noise signal is sent to signal pre-reservation module and noise analysis module.
In the present embodiment, signal pre-reservation module, including receiving unit, transmitting element, collecting unit, storage unit,
Recognition unit, comparison unit, prompt unit, screening unit and stick unit before magnetic resonance equipment work, gather magnetic in advance
Noise in resonance shielding, and the noise signal with fixed frequency feature is saved in signal pre-reservation module；
Signal pre-reservation module is received when magnetic resonance equipment is started to work from noise detection module treated noise
Signal compares the signal advanced in memory module, identifies fixed frequency characteristic noise signal, and distinguishes its fixed frequency spy
Noise signal is levied, the noise of equipment signal of fixed frequency feature is sent to de-noising signal processing module, it is special to retain fixed frequency
Levy the non-noise of equipment signal in noise；
If in the signal advanced in comparing memory module, there is the unsaved noise with fixed frequency feature
Signal, signal pre-reservation module will be sent gathers prompting again, after equipment works, resurveys in magnetic resonance shield
Noise signal with fixed frequency feature is consolidated with what other external causes such as the equipment tackling renewal of the equipment or more renew occurred
Determine the variation of frequecy characteristic noise.
In the present embodiment, noise analysis module, including receiving unit, transmitting element, extraction unit, analytic unit, right
Than unit, screening unit and stick unit, for receiving from noise detection module acquisition and treated noise signal, and
The noise signal of the fixed frequency feature gathered in advance according to signal pre-reservation module, preserved distinguishes on-fixed frequecy characteristic and makes an uproar
Acoustical signal analyzes its on-fixed frequecy characteristic noise signal, distinguishes on-fixed frequecy characteristic noise signal, retains on-fixed frequency
The noise of equipment signal of on-fixed frequecy characteristic is sent to de-noising signal processing mould by the non-noise of equipment signal in characteristic noise
Block.
In this embodiment, de-noising signal processing module receives and comes self noise pre-reservation module and noise analysis resume module
The noise of equipment signal obtained afterwards, and synthesis processing is carried out, and the de-noising signal that synthesis is handled well is amplified and digital-to-analogue turns
Noise reduction analog signal is changed to, generates the noise reduction analog signal that there is opposite phase with noise of equipment signal.
In the present embodiment, de-noising signal processing module includes noise synthin, digital-to-analogue conversion element and de-noising signal
Amplifier element, noise synthin are connected with digital-to-analogue conversion element, de-noising signal amplifier element, pre- for synthesizing, handling noise
Reservation module and noise analysis module send that treated noise of equipment；Wherein：
Noise synthin, the equipment for being obtained after self noise pre-reservation module in future and noise analysis resume module are made an uproar
Acoustical signal carries out synthesis processing；
Digital-to-analogue conversion element, for the noise reduction digital signal after synthesizing to be converted to noise reduction analog signal；
De-noising signal amplifier element carries out signal enhanced processing for the de-noising signal after synthesizing.
In the present embodiment, first carry out signal enhanced processing to synthesis treated noise reduction digital signal and carry out digital-to-analogue again to turn
It is changed to noise reduction analog signal or is first synthesized that treated the advanced line number mould of noise reduction digital signal is converted to noise reduction analog signal
Signal enhanced processing is carried out again.
In the present embodiment, de-noising signal transmitting module, using multiple noise reduction horns or acoustical generator, be attached at magnetic resonance into
As wall surrounding between system body surface or shielding, for the noise reduction handled well analog signal to be transmitted in shielding, make anti-
The noise that phase sound wave is generated with noise source is overlapped mutually, and is offset or is weakened its noise.
In the present embodiment, contain power supply interface in active noise reducing device, be connected with the power supply in shielding.
In the present embodiment, the active noise reducing device body is arranged on the wall on the door in shielding, the magnetic resonance
Imaging system is positioned near the wall on the door in shielding.
In the present embodiment, the noise source is magnetic resonance imaging gradient coil, and the noise of equipment signal is
The noise signal that magnetic resonance imaging gradient coil generates.
In the present embodiment, the absorbing material is silica gel or silencing cotton.
Certain above-described embodiment is only the technical concepts and features for illustrating the utility model, and its object is to allow be familiar with this
The people of technology can understand the content of the utility model and implement according to this, and the protection model of the utility model can not be limited with this
It encloses.Any modifications made in accordance with the spirit of the main technical solutions of the utility model should all cover the guarantor in the utility model
Within the scope of shield.
Claims (5)
1. a kind of combined type denoising device is fixedly installed in the shielding for placing magnetic resonance imaging system, which is characterized in that bag
Passive denoising device and active noise reducing device are included, wherein, passive denoising device surface of wall and is arranged on by being arranged between shielding
The absorbing material composition of magnetic resonance imaging system body surfaces；The active noise reducing device includes active noise reducing device body and master
Dynamic denoising device ancillary equipment, the active noise reducing device body include signal pre-reservation module, noise analysis module and noise reduction
Signal processing module is electrically connected between the signal pre-reservation module, noise analysis module and de-noising signal processing module, described
Active noise reducing device ancillary equipment includes noise reduction control module, noise detection module and de-noising signal transmitting module, the noise reduction
It is electrically connected between control module, noise detection module and de-noising signal transmitting module, the active noise reducing device body and active
It is electrically connected between denoising device ancillary equipment, wherein：
The noise reduction control module is arranged in the scanning system of the magnetic resonance system, for controlling the noise detection module
Operation；
The noise detection module includes multiple microphones, is attached at the body surfaces of the magnetic resonance imaging system, for
Real-time detection, acquisition shield the noise of interior appearance during magnetic resonance imaging system works, and carry out being treated as noise signal,
And noise signal is sent to the noise analysis module and the signal pre-reservation module by treated；
The signal pre-reservation module is used for before magnetic resonance imaging system work, is gathered and is identified in the shielding in advance
Noise, will wherein the noise transition with fixed frequency feature for fixed frequency feature noise signal and be saved in signal and protect in advance
Mould storage unit in the block is stayed, while receives the noise signal sent from the noise detection module, comparison pre-saves
Noise signal, identify the noise signal of fixed frequency feature, and screen in fixed frequency characteristic noise signal by magnetic resonance
The noise of equipment signal that system generates, and noise of equipment signal is transmitted to de-noising signal processing module, while can also retain
Non- noise of equipment signal in fixed frequency characteristic noise signal, and work as and compared the noise signal pre-saved in storage unit
Afterwards, there is the unsaved noise signal with fixed frequency feature, signal pre-reservation module is sent gathers prompting again；
The noise analysis module is for receiving the noise signal sent from the noise detection module, and it is pre- to extract signal
The noise signal pre-saved in reservation module distinguishes on-fixed frequecy characteristic noise signal, and filters out on-fixed frequency
The noise of equipment signal generated in rate characteristic noise signal by magnetic resonance system, and noise of equipment signal can be transmitted to noise reduction letter
Number processing module, and retain the non-noise of equipment signal in on-fixed frequecy characteristic noise signal；
The noise of equipment signal that the de-noising signal processing module receives noise pre-reservation module and the transmission of noise analysis module comes,
It is noise reduction digital signal to carry out synthesis processing, and the noise reduction digital signal that synthesis is handled well is amplified and digital-to-analogue conversion is drop
It makes an uproar analog signal, generates the noise reduction analog signal that there is opposite phase with noise of equipment signal；
The de-noising signal transmitting module using multiple noise reduction horns or acoustical generator, is attached at magnetic resonance imaging system body table
Wall surrounding between face or shielding, for the noise reduction analog signal with opposite phase to be transmitted in shielding.
2. a kind of combined type denoising device according to claim 1, it is characterised in that：The de-noising signal processing module bag
Include noise synthin, digital-to-analogue conversion element and de-noising signal amplifier element, the noise synthin and digital-to-analogue conversion element,
De-noising signal amplifier element is electrically connected, wherein：
Equipment of the noise synthin for being obtained after self noise pre-reservation module in future and noise analysis resume module is made an uproar
Acoustical signal synthesis processing is noise reduction digital signal；
The digital-to-analogue conversion element is used to the noise reduction digital signal after synthesizing being converted to noise reduction analog signal；
The de-noising signal amplifier element is used for the de-noising signal after synthesizing and carries out signal enhanced processing.
3. a kind of combined type denoising device according to claim 2, it is characterised in that：At the noise synthin synthesis
Noise reduction digital signal after reason first passes through de-noising signal amplifier element again by digital-to-analogue conversion element.
4. a kind of combined type denoising device according to claim 2, it is characterised in that：At the noise synthin synthesis
Noise reduction digital signal after reason first passes through digital-to-analogue conversion element again by de-noising signal amplifier element.
5. a kind of combined type denoising device according to claim 1, it is characterised in that：Also contain in the active noise reducing device
There is power supply interface, be connected with the power supply in shielding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621324615.0U CN207440268U (en) | 2016-12-05 | 2016-12-05 | A kind of combined type denoising device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621324615.0U CN207440268U (en) | 2016-12-05 | 2016-12-05 | A kind of combined type denoising device |
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| Publication Number | Publication Date |
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| CN207440268U true CN207440268U (en) | 2018-06-01 |
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| CN201621324615.0U Withdrawn - After Issue CN207440268U (en) | 2016-12-05 | 2016-12-05 | A kind of combined type denoising device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443531A (en) * | 2016-12-05 | 2017-02-22 | 苏州朗润医疗系统有限公司 | Compound noise reducing device and method of compound noise reducing |
| CN114026448A (en) * | 2020-04-06 | 2022-02-08 | 皇家飞利浦有限公司 | Magnetic resonance imaging system with acoustic warning signal |
-
2016
- 2016-12-05 CN CN201621324615.0U patent/CN207440268U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443531A (en) * | 2016-12-05 | 2017-02-22 | 苏州朗润医疗系统有限公司 | Compound noise reducing device and method of compound noise reducing |
| CN106443531B (en) * | 2016-12-05 | 2024-04-12 | 苏州朗润医疗系统有限公司 | Combined noise reduction device and method for implementing combined noise reduction |
| CN114026448A (en) * | 2020-04-06 | 2022-02-08 | 皇家飞利浦有限公司 | Magnetic resonance imaging system with acoustic warning signal |
| CN114026448B (en) * | 2020-04-06 | 2022-12-06 | 皇家飞利浦有限公司 | Magnetic resonance imaging system with acoustic warning signal |
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