CN107329411A - Magnetic resonance equipment and noise control method and nonvolatile computer storage media - Google Patents
Magnetic resonance equipment and noise control method and nonvolatile computer storage media Download PDFInfo
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- CN107329411A CN107329411A CN201710516344.1A CN201710516344A CN107329411A CN 107329411 A CN107329411 A CN 107329411A CN 201710516344 A CN201710516344 A CN 201710516344A CN 107329411 A CN107329411 A CN 107329411A
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
Abstract
The present invention proposes a kind of magnetic resonance equipment and noise control method and nonvolatile computer storage media, wherein, magnetic resonance noise control method includes：Obtain current sequence gradient waveform；Based on predetermined noise master pattern, current noise parameter is calculated by current sequence gradient waveform；The maximum for obtaining magnetic resonance imaging object bears parameter；The maximum whether checking current noise parameter exceeds magnetic resonance imaging object bears parameter；When it is determined that current noise parameter bears parameter beyond the maximum of magnetic resonance imaging object, current sequence gradient waveform is adjusted, so that the corresponding noise parameter of sequence gradient waveform after adjustment bears parameter without departing from the maximum of magnetic resonance imaging object.By technical scheme, the noise that magnetic resonance equipment is produced in scanning process can be adjusted flexibly, it is to avoid the problems such as impaired hearing caused by the too noisy and to magnetic resonance imaging object or aggravation, lift the security and controllability of magnetic resonance imaging.
Description
【Technical field】
The present invention relates to field of medical technology, more particularly to a kind of magnetic resonance equipment and noise control method and non-volatile
Computer-readable storage medium.
【Background technology】
At present, magnetic resonance imaging detection is largely used in medical treatment, convenient that sweep object is checked comprehensively.
However, can supervene noise in magnetic resonance scan sequences, easily influence is suffered from noise circumstance for a long time
The hearing of person, or even cause conditions of patients to deteriorate or become deaf, particularly with infant patient, the auditory nerve of infant patient is also
Do not develop completely, the noise in magnetic resonance scan sequences is likely to produce damage to the hearing of infant patient.
Therefore, influence of the noise in magnetic resonance scan sequences to sweep object how is reduced, as urgently to be resolved hurrily at present
Technical problem.
【The content of the invention】
It is situated between the embodiments of the invention provide a kind of magnetic resonance equipment and the storage of noise control method and non-volatile computer
Matter, it is intended to solve the technical problem of influence of noise patient's hearing in correlation technique in magnetic resonance scan sequences, magnetic can be reduced
Influence of the noise to sweep object during resonance scan, lifts the security of magnetic resonance imaging.
In a first aspect, the embodiments of the invention provide a kind of magnetic resonance noise control method, including：Obtain current sequence ladder
Spend waveform；Based on predetermined noise master pattern, current noise parameter is calculated by the current sequence gradient waveform；Obtain magnetic resonance
The maximum of sweep object bears parameter；Verify whether the current noise parameter holds beyond the maximum of the magnetic resonance imaging object
By parameter；When it is determined that the current noise parameter bears parameter beyond the maximum of the magnetic resonance imaging object, adjustment is described
Current sequence gradient waveform, so that the corresponding noise parameter of sequence gradient waveform after adjustment is without departing from the magnetic resonance imaging pair
The maximum of elephant bears parameter.
In the above embodiment of the present invention, alternatively, it is provided with the predetermined noise master pattern：Several gradient is strong
Degree noise parameter corresponding with gradient climb rate lower trapezoid sequence gradient waveform；The several gradient intensity and the gradient climb rate
The corresponding noise parameter of lower triangle sequence gradient waveform；The corresponding noise parameter of gradient is combined under same gradient intensity, wherein,
Combining gradient includes one or more in positive antigradient, positive positive gradient and string heat gradient；With it is Bu Tong all under same gradient intensity
The corresponding noise parameter of combination gradient of phase.
It is alternatively, described to be based on predetermined noise master pattern in the above embodiment of the present invention, by current sequence ladder
The step of spending waveshape current noise parameter, specifically includes：Obtain the gradient climb rate, most of the current sequence gradient waveform
Big gradient intensity and gradient usage cycles；By the gradient climb rate, the greatest gradient intensity and the gradient usage cycles
It is applied in the predetermined noise master pattern, the current noise parameter is obtained to calculate.
In the above embodiment of the present invention, alternatively, the current noise parameter includes maximum decibel volume and/or volume
Duration.
In the above embodiment of the present invention, alternatively, whether the checking current noise parameter is total to beyond the magnetic
The step of maximum of sweep object of shaking bears parameter, specifically includes：Detect whether the maximum decibel volume is total to beyond the magnetic
The maximum of sweep object of shaking bears a decibel volume, and/or whether the volume duration exceeds the magnetic resonance imaging object
Maximum bear duration；When only described maximum decibel volume beyond the maximum bears a decibel volume, or ought only described sound
Amount duration bears duration beyond the maximum, or when the maximum decibel volume beyond the maximum bears a decibel sound
Amount and the volume duration beyond the maximum bear duration when, determine the current noise parameter beyond the magnetic
The maximum of resonance scan object bears parameter.
In the above embodiment of the present invention, alternatively, the maximum for obtaining magnetic resonance imaging object bears the step of parameter
Suddenly, specifically include：Determine the age bracket belonging to the magnetic resonance imaging object；Obtain the corresponding maximum of the age bracket and bear ginseng
Number bears parameter as the maximum of the magnetic resonance imaging object.
In the above embodiment of the present invention, alternatively, the step of the adjustment current sequence gradient waveform, specific bag
Include：One or more in the gradient climb rate, gradient intensity and the gradient usage cycles of the current sequence gradient waveform is adjusted,
The noise parameter of the sequence gradient waveform after adjustment is set to bear parameter without departing from the maximum of the magnetic resonance imaging object.
Second aspect, the embodiments of the invention provide a kind of magnetic resonance equipment, including：Scanning means, processor and storage
Device, wherein, the processor is used to obtain the current sequence gradient waveform that the scanning means carries out magnetic resonance imaging, described to deposit
Being stored with reservoir can be by the instruction of the computing device, and the processor is additionally operable to call the memory storage
The instruction, performs following operate：Based on predetermined noise master pattern, current noise is calculated by the current sequence gradient waveform
Parameter；The maximum for obtaining magnetic resonance imaging object bears parameter；Verify whether the current noise parameter exceeds the magnetic resonance
The maximum of sweep object bears parameter；When it is determined that the current noise parameter is born beyond the maximum of the magnetic resonance imaging object
During parameter, adjust the current sequence gradient waveform so that the corresponding noise parameter of sequence gradient waveform after adjustment without departing from
The maximum of the magnetic resonance imaging object bears parameter.
In the above embodiment of the present invention, alternatively, the processor can also carry out following operation：Obtain described current
The gradient climb rate, greatest gradient intensity and the gradient usage cycles of sequence gradient waveform；By the gradient climb rate, the maximum
Gradient intensity and the gradient usage cycles are applied in the predetermined noise master pattern, and the current noise is obtained to calculate
Parameter.
The third aspect, the embodiments of the invention provide a kind of nonvolatile computer storage media, the computer that is stored with can
Execute instruction, the computer executable instructions are used to perform：Obtain current sequence gradient waveform；Based on predetermined noise master die
Type, current noise parameter is calculated by the current sequence gradient waveform；The maximum for obtaining magnetic resonance imaging object bears parameter；Test
Demonstrate,prove whether the current noise parameter bears parameter beyond the maximum of the magnetic resonance imaging object；When it is determined that the current noise
When the maximum that parameter exceeds the magnetic resonance imaging object bears parameter, the current sequence gradient waveform is adjusted, so that adjustment
The corresponding noise parameter of sequence gradient waveform afterwards bears parameter without departing from the maximum of the magnetic resonance imaging object.
Above technical scheme, for the technology of influence of noise patient's hearing in the magnetic resonance scan sequences in correlation technique
Problem, it is proposed that the scheme being adjusted according to predetermined noise master pattern to current sequence gradient waveform, specifically, in advance
Determine to provide a variety of sequence gradient waveforms and its corresponding noise parameter in noise criteria model, therefore, by current sequence gradient ripple
Shape, which is applied to predetermined noise master pattern, can calculate current noise parameter, for each or each type of magnetic resonance imaging pair
As all parameter being born to the maximum that should have itself, when carrying out magnetic resonance imaging to a certain magnetic resonance imaging object, it can be determined that
The maximum whether current noise parameter exceedes magnetic resonance imaging object bears parameter, if exceeding, and illustrates current noise level
The maximum for having been over magnetic resonance imaging object bears parameter, easily causes hearing impairment or the state of an illness to magnetic resonance imaging object
The influence such as aggravate, accordingly, it would be desirable to be adjusted to current sequence gradient waveform, current sequence gradient waveform is adjusted to will not be to
The level that magnetic resonance imaging object makes a very bad impression.
By above technical scheme, the noise that magnetic resonance equipment is produced in scanning process can be adjusted flexibly, to reduce
Influence of the noise to magnetic resonance imaging object in magnetic resonance scan sequences, it is to avoid because of the too noisy to magnetic resonance imaging pair
The problems such as causing impaired hearing or aggravation, lift the security and controllability of magnetic resonance imaging.
【Brief description of the drawings】
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this area
For those of ordinary skill, without having to pay creative labor, it can also be obtained according to these accompanying drawings other attached
Figure.
Fig. 1 shows the flow chart of the magnetic resonance noise control method of one embodiment of the present of invention；
Fig. 2 shows the schematic diagram of various waveforms in one embodiment of the present of invention；
Fig. 3 shows the block diagram of the magnetic resonance equipment of one embodiment of the present of invention；
Fig. 4 shows the schematic diagram of timing waveform in one embodiment of the present of invention.
【Embodiment】
In order to be better understood from technical scheme, the embodiment of the present invention is retouched in detail below in conjunction with the accompanying drawings
State.
It will be appreciated that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
Its embodiment, belongs to the scope of protection of the invention.
The term used in embodiments of the present invention is the purpose only merely for description specific embodiment, and is not intended to be limiting
The present invention." one kind ", " described " and "the" of singulative used in the embodiment of the present invention and appended claims
It is also intended to including most forms, unless context clearly shows that other implications.
Fig. 1 shows the flow chart of the magnetic resonance noise control method of one embodiment of the present of invention.
As shown in figure 1, the embodiments of the invention provide a kind of magnetic resonance noise control method, including：
Step 102, current sequence gradient waveform is obtained.The sequence of magnetic resonance imaging refers to be total to for obtaining sweep object magnetic
One group of RF pulse signal, gradient pulse signal and the corresponding time interval shaken set by data.Sequence gradient waveform is referred to
There are the gradient scanning signal waveform of sequence when magnetic resonance equipment is scanned, magnetic resonance equipment a variety of sequences (for example to spin
Echo sequence, gradin-echo, echo planar imaging sequence, propeller sequence etc.), different sequences can correspond to different scannings
Position or image display format, than if any the sequence for being exclusively used in knee joint scan, being exclusively used in the sequence of wrist scanning.
And gradient pulse signal can be used for being spatially encoded scanning signal, so as to determine scanning position according to coding
Put, gradient is stronger, sweep time is shorter, then scan efficiency is also higher, but the adjoint strong noise of mechanical oscillation meeting of gradient, and it is terraced
Degree is weaker, and sweep time is longer, then scan efficiency is lower, but correspondingly, swept noise is also lower.
Step 104, based on predetermined noise master pattern, current noise parameter is calculated by current sequence gradient waveform.It is predetermined
A variety of sequence gradient waveforms and its corresponding noise parameter are provided in noise criteria model, therefore, by current sequence gradient waveform
Current noise parameter can be calculated applied to predetermined noise master pattern.
Step 104 can be the gradient climb rate, gradient intensity and the gradient for obtaining current sequence gradient waveform specifically
Usage cycles；The gradient climb rate, gradient intensity and gradient usage cycles are applied in predetermined noise master pattern, to calculate
To current noise parameter.The gradient climb rate can include the gradient climb rate.So, according to the many-side of current sequence gradient waveform
Parameter, the high current noise parameter of accuracy can be obtained, alternatively, current noise parameter be current sequence gradient waveform pair
The maximum noise parameter answered.
In a practical situation, it is also contemplated that the systematic parameter of magnetic resonance equipment, such as magnetic resonance equipment internal structure pair
This factor of the influence in noise transmission path, by this factor and the gradient climb rate, greatest gradient intensity and gradient usage cycles
Combine the judgement for together carrying out current noise parameter, greatly improve the accuracy of current noise parameter, be easy to following step
Further current sequence gradient waveform is accurately adjusted in rapid.
Wherein, current noise parameter includes maximum decibel volume and/or volume duration, it is, of course, also possible to including with
Any other related parameter of noise.
Step 106, the maximum for obtaining magnetic resonance imaging object bears parameter.Swept for each or each type of magnetic resonance
Object is retouched, parameter all is born to the maximum that there should be itself, the maximum bears parameter and refers to make to magnetic resonance imaging object
Into the maximum noise parameter of baneful influence.
Further, the maximum of magnetic resonance imaging object bears that parameter is relevant with the age, and the age is smaller, bears the energy of noise
Power is weaker, then step 106 is specifically included：Determine the age bracket belonging to magnetic resonance imaging object；Obtain the corresponding maximum of age bracket
Parameter is born as the maximum of magnetic resonance imaging object and bears parameter.Maximum is selected to bear parameter by age bracket, can maximum limit
Degree ground adapts to the flexibility actually born noise immune, improve magnetic resonance detection of magnetic resonance imaging object, protects sufferer
Life and health.
Step 108, whether checking current noise parameter bears parameter beyond the maximum of magnetic resonance imaging object.
Specifically, the maximum that whether detectable maximum decibel volume exceeds magnetic resonance imaging object bears a decibel volume,
And/or whether volume duration bears duration beyond the maximum of magnetic resonance imaging object；When only maximum decibel volume surpasses
Go out maximum and bear a decibel volume, or only volume duration ought bear duration beyond maximum, or when maximum decibel volume surpasses
Go out maximum bear decibel volume and volume duration beyond maximum bear duration when, determine current noise parameter exceed magnetic
The maximum of resonance scan object bears parameter.
That is, magnetic resonance equipment determines current noise ginseng in the case of which kind of can be automatically located according to actual conditions
Number bears parameter beyond the maximum of magnetic resonance imaging object, adds the intelligent and practicality of magnetic resonance equipment, certainly, also may be used
To determine that current noise parameter is born beyond the maximum of magnetic resonance imaging object under what circumstances by the manually operated selection of doctor
Parameter, so that maximum meets actual medical detection demand, lifts the experience of patient.
And determine current noise parameter and include but is not limited to beyond the situation that the maximum of magnetic resonance imaging object bears parameter
Only maximum decibel volume is beyond standard decibel volume, when only volume duration is beyond typical problem duration, maximum decibel
Volume beyond standard decibel volume and volume duration beyond typical problem duration these three, can also be to it is any its
The restriction of his noise parameter.
Step 110, when it is determined that current noise parameter bears parameter beyond the maximum of magnetic resonance imaging object, adjustment is current
Sequence gradient waveform, so that maximum of the corresponding noise parameter of sequence gradient waveform without departing from magnetic resonance imaging object after adjustment
Bear parameter.
When carrying out magnetic resonance imaging to a certain magnetic resonance imaging object, it can be determined that whether current noise parameter exceedes
The maximum of magnetic resonance imaging object bears parameter, if exceeding, and illustrates that current noise level has been over magnetic resonance imaging pair
The maximum of elephant bears parameter, easily causes hearing impairment or aggravation etc. to influence to magnetic resonance imaging object.Accordingly, it would be desirable to right
Current sequence gradient waveform is adjusted, and current sequence gradient waveform is adjusted to will not be caused badly to magnetic resonance imaging object
The level of influence, it is achieved thereby that decrease of noise functions.
Specifically, in the gradient climb rate, gradient intensity and the gradient usage cycles that can adjust current sequence gradient waveform
One or more, the noise parameter of the sequence gradient waveform after adjustment is born ginseng without departing from the maximum of magnetic resonance imaging object
Number.Sequence gradient waveform is mainly influenceed by the gradient climb rate, gradient intensity and gradient usage cycles, therefore, and adjustment gradient is climbed
The rate of liter, gradient intensity and gradient usage cycles can change sequence gradient waveform.
By above technical scheme, the noise that magnetic resonance equipment is produced in scanning process can be adjusted flexibly, to reduce
Influence of the noise to magnetic resonance imaging object in magnetic resonance scan sequences, it is to avoid because of the too noisy to magnetic resonance imaging pair
The problems such as causing impaired hearing or aggravation, lift the security and controllability of magnetic resonance imaging.
As shown in Fig. 2 being provided with predetermined noise master pattern：
(1) the corresponding noise parameter of several gradient intensity and the gradient climb rate lower trapezoid sequence gradient waveform.
(2) the corresponding noise parameter of triangle sequence gradient waveform under several gradient intensity and the gradient climb rate.
(3) the corresponding noise parameter of gradient is combined under same gradient intensity, wherein, combination gradient includes positive antigradient, just
One or more in positive gradient and string heat gradient.
(4) under same gradient intensity different cycles the corresponding noise parameter of combination gradient.
Many sequence gradient waveforms and its corresponding noise parameter are provided with predetermined noise master pattern, when need meter
When calculating current noise parameter, each sequence gradient ripple that will can be set in current sequence gradient waveform and predetermined noise master pattern
Shape is matched, and specific matching way can be to detect in predetermined noise master pattern whether there is gradient intensity, the gradient climb rate
And/or the parameter such as cycle and the same or like sequence gradient waveform of current sequence gradient waveform, if so, then can be pre- by this
Determine the corresponding noise parameter of sequence gradient waveform in noise criteria model and be defined as the corresponding noise of current sequence gradient waveform
Parameter.Wherein, the close gap for referring to parameter is in preset range, such as, the gradient intensity of current sequence gradient waveform
In the range of 0.95 to 1.05 times in the gradient intensity of the sequence gradient waveform in predetermined noise master pattern.
Fig. 3 shows the block diagram of the magnetic resonance equipment of one embodiment of the present of invention.
As shown in figure 3, the embodiments of the invention provide a kind of magnetic resonance equipment 300, including：Scanning means 302, processor
304 and memory 306, wherein, processor 304 is used to obtain the current sequence gradient that scanning means 302 carries out magnetic resonance imaging
Be stored with the instruction that can be performed by processor 304 in waveform, memory 306, and processor 304 is additionally operable to call memory
The instruction of 306 storages, performs following operate：
Based on predetermined noise master pattern, current noise parameter is calculated by current sequence gradient waveform；Magnetic resonance is obtained to sweep
The maximum for retouching object bears parameter；The maximum whether checking current noise parameter exceeds magnetic resonance imaging object bears parameter；When
Determine current noise parameter beyond the maximum of magnetic resonance imaging object bear parameter when, adjust current sequence gradient waveform so that
The corresponding noise parameter of sequence gradient waveform after adjustment bears parameter without departing from the maximum of magnetic resonance imaging object.
Processor can also carry out following operation：The gradient climb rate, the greatest gradient for obtaining current sequence gradient waveform are strong
Degree and gradient usage cycles；The gradient climb rate, greatest gradient intensity and gradient usage cycles are applied to predetermined noise master die
In type, current noise parameter is obtained to calculate.
Magnetic resonance equipment 300 can also include input interface 308 and output interface 310, for another device or system
Communicated.
Fig. 4 shows the timing waveform of an epi_fid sequence, and RF represents radio-frequency pulse, and SS is slice selective gradient, and PE is phase
Position coding gradient, RO encodes gradient to read.Here we assume that SS correspondence Z axis gradient, PE correspondence Y-axis gradients, RO correspondence X-axis
Gradient.To such a epi_fid sequences, the method for noise prediction is as follows：
1st, Z axis gradient is trapezoidal waveform, according to its gradient intensity and time-to-climb, is found most in master pattern (1)
Close model is estimated.
2nd, Y-axis is periodic triangular wave series, is selected according to the maximum intensity of triangular wave and the climb rate in (1) most
Suitable triangle wave pattern, while the immediate cycle in matching (3).To estimate the noise size that Y-axis gradient zone comes.
3rd, X-axis for periodically combination gradient waveform, first determine whether its be trapezoidal gradient, according to its intensity size (G1) with
And time-to-climb (t1) finds most suitable Waveform Matching in (1).Secondly judge composite type, string hair ladder is corresponded in (2)
Degree combination.Finally according to the gradient cycle, the matching cycle is found in (3), the noise size of Z axis is determined, wherein, the cycle is twice
Echo sounding (esp).
The noise size estimated is at least the maximum of three axles.When finding to estimate noise size more than limit value, judge most
Big noise source, it is assumed that X-axis source is most strong, can be by reducing the X-axis gradient climb rate (extension t1), or pass through and reduce maximum
Gradient intensity (reduces G1), or changes the methods such as cycle (changing esp) to adjust gradient waveform, reduces noise.
In addition, the embodiment of the present invention additionally provides a kind of nonvolatile computer storage media, the computer that is stored with can be held
Row instruction, computer executable instructions are used to perform：Obtain current sequence gradient waveform；Based on predetermined noise master pattern, by
Current sequence gradient waveform calculates current noise parameter；The maximum for obtaining magnetic resonance imaging object bears parameter；Checking is currently made an uproar
The maximum whether sound parameter exceeds the magnetic resonance imaging object bears parameter；When it is determined that the current noise parameter is beyond described
When the maximum of magnetic resonance imaging object bears parameter, the current sequence gradient waveform is adjusted, so that the sequence gradient after adjustment
The corresponding noise parameter of waveform bears parameter without departing from the maximum of the magnetic resonance imaging object.
Technical scheme is described in detail above in association with accompanying drawing, can be flexible by technical scheme
The noise that adjustment magnetic resonance equipment is produced in scanning process, to reduce the noise in magnetic resonance scan sequences to magnetic resonance imaging
The influence of object, it is to avoid the problems such as impaired hearing caused by the too noisy and to magnetic resonance imaging object or aggravation, carry
Rise the security and controllability of magnetic resonance imaging.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, represent
There may be three kinds of relations, for example, A and/or B, can be represented：Individualism A, while there is A and B, individualism B these three
Situation.In addition, character "/" herein, it is a kind of relation of "or" to typically represent forward-backward correlation object.
Depending on linguistic context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determining " or " in response to detection ".Similarly, depending on linguistic context, phrase " if it is determined that " or " if detection
(condition or event of statement) " can be construed to " when it is determined that when " or " in response to determine " or " when the detection (condition of statement
Or event) when " or " in response to detection (condition or event of statement) ".
, can be with several embodiments provided by the present invention, it should be understood that disclosed systems, devices and methods
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Divide, only a kind of division of logic function there can be other dividing mode when actually realizing, for example, multiple units or group
Part can combine or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown
Or the coupling each other discussed or direct-coupling or communication connection can be by some interfaces, device or unit it is indirect
Coupling is communicated to connect, and can be electrical, machinery or other forms.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are to cause a computer
Device (can be personal computer, server, or network equipment etc.) or processor (Processor) perform the present invention each
The part steps of embodiment methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. it is various
Can be with the medium of store program codes.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (10)
1. a kind of magnetic resonance noise control method, it is characterised in that including：
Obtain current sequence gradient waveform；
Based on predetermined noise master pattern, current noise parameter is calculated by the current sequence gradient waveform；
The maximum for obtaining magnetic resonance imaging object bears parameter；
Verify whether the current noise parameter bears parameter beyond the maximum of the magnetic resonance imaging object；
When it is determined that the current noise parameter bears parameter beyond the maximum of the magnetic resonance imaging object, adjust described current
Sequence gradient waveform, so that the corresponding noise parameter of sequence gradient waveform after adjustment is without departing from the magnetic resonance imaging object
Maximum bears parameter.
2. magnetic resonance noise control method according to claim 1, it is characterised in that in the predetermined noise master pattern
It is provided with following one or more：
The corresponding noise parameter of several gradient intensity and the gradient climb rate lower trapezoid sequence gradient waveform；
The corresponding noise parameter of triangle sequence gradient waveform under the several gradient intensity and the gradient climb rate；
The corresponding noise parameter of gradient is combined under same gradient intensity, wherein, combination gradient include positive antigradient, positive positive gradient and
One or more in string heat gradient；With
The corresponding noise parameter of combination gradient of different cycles under same gradient intensity.
3. magnetic resonance noise control method according to claim 1 or 2, it is characterised in that described to be based on predetermined noise mark
Quasi-mode type, the step of current noise parameter is calculated by the current sequence gradient waveform, including：
Obtain the gradient climb rate, greatest gradient intensity and the gradient usage cycles of the current sequence gradient waveform；
The gradient climb rate, the greatest gradient intensity and the gradient usage cycles are applied to the predetermined noise standard
In model, the current noise parameter is obtained to calculate.
4. magnetic resonance noise control method according to claim 3, it is characterised in that the current noise parameter is included most
Big decibel volume and/or volume duration.
5. magnetic resonance noise control method according to claim 4, it is characterised in that the checking current noise ginseng
The step of maximum whether number exceeds the magnetic resonance imaging object bears parameter, including：
Detect whether the maximum decibel volume bears a decibel volume, and/or institute beyond the maximum of the magnetic resonance imaging object
State whether volume duration bears duration beyond the maximum of the magnetic resonance imaging object；
When only described maximum decibel volume beyond the maximum bears a decibel volume, or ought only described volume duration exceed institute
State maximum and bear duration, or when the maximum decibel volume bears decibel volume and the volume continues beyond the maximum
Duration beyond the maximum bear duration when, determine the current noise parameter beyond the magnetic resonance imaging object most
Bear parameter greatly.
6. magnetic resonance noise control method according to claim 3, it is characterised in that the acquisition magnetic resonance imaging object
Maximum the step of bear parameter, including：
Determine the age bracket belonging to the magnetic resonance imaging object；
Obtain the corresponding maximum of the age bracket and bear parameter as the maximum of the magnetic resonance imaging object and bear parameter.
7. magnetic resonance noise control method according to claim 3, it is characterised in that the adjustment current sequence ladder
The step of spending waveform, including：
Adjust one or many in the gradient climb rate, gradient intensity and the gradient usage cycles of the current sequence gradient waveform
, the noise parameter of the sequence gradient waveform after adjustment is born parameter without departing from the maximum of the magnetic resonance imaging object.
8. a kind of magnetic resonance equipment, it is characterised in that including：Scanning means, processor and memory, wherein, the processor
Carrying out being stored with the current sequence gradient waveform of magnetic resonance imaging, the memory for obtaining the scanning means can be by
The instruction of the computing device, and the processor is additionally operable to call the instruction of the memory storage, performs following
Operation：
Based on predetermined noise master pattern, current noise parameter is calculated by the current sequence gradient waveform；
The maximum for obtaining magnetic resonance imaging object bears parameter；
Verify whether the current noise parameter bears parameter beyond the maximum of the magnetic resonance imaging object；
When it is determined that the current noise parameter bears parameter beyond the maximum of the magnetic resonance imaging object, adjust described current
Sequence gradient waveform, so that the corresponding noise parameter of sequence gradient waveform after adjustment is without departing from the magnetic resonance imaging object
Maximum bears parameter.
9. magnetic resonance equipment according to claim 8, it is characterised in that the processor can also carry out following operation：
Obtain the gradient climb rate, greatest gradient intensity and the gradient usage cycles of the current sequence gradient waveform；
The gradient climb rate, the greatest gradient intensity and the gradient usage cycles are applied to the predetermined noise standard
In model, the current noise parameter is obtained to calculate.
10. a kind of nonvolatile computer storage media, be stored with computer executable instructions, the computer executable instructions
For performing：
Obtain current sequence gradient waveform；
Based on predetermined noise master pattern, current noise parameter is calculated by the current sequence gradient waveform；
The maximum for obtaining magnetic resonance imaging object bears parameter；
Verify whether the current noise parameter bears parameter beyond the maximum of the magnetic resonance imaging object；
When it is determined that the current noise parameter bears parameter beyond the maximum of the magnetic resonance imaging object, adjust described current
Sequence gradient waveform, so that the corresponding noise parameter of sequence gradient waveform after adjustment is without departing from the magnetic resonance imaging object
Maximum bears parameter.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112826494A (en) * | 2020-12-30 | 2021-05-25 | 上海联影医疗科技股份有限公司 | Method, system, apparatus and storage medium for reducing vibration and acoustic noise of MR device |
| CN112858975A (en) * | 2019-11-26 | 2021-05-28 | 上海联影医疗科技股份有限公司 | Noise control method for magnetic resonance examination and scan sequence determination method |
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