CN111110276A - Signal overload protection method in ultrasonic equipment, storage medium and ultrasonic equipment - Google Patents
Signal overload protection method in ultrasonic equipment, storage medium and ultrasonic equipment Download PDFInfo
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- CN111110276A CN111110276A CN201911320179.8A CN201911320179A CN111110276A CN 111110276 A CN111110276 A CN 111110276A CN 201911320179 A CN201911320179 A CN 201911320179A CN 111110276 A CN111110276 A CN 111110276A
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- 230000003727 cerebral blood flow Effects 0.000 claims abstract description 135
- 230000017531 blood circulation Effects 0.000 claims abstract description 93
- 238000002604 ultrasonography Methods 0.000 claims description 36
- 238000005070 sampling Methods 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 10
- 238000001228 spectrum Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 abstract description 5
- 230000002238 attenuated effect Effects 0.000 description 4
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- 210000003484 anatomy Anatomy 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/06—Measuring blood flow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/5215—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/5269—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving detection or reduction of artifacts
Abstract
The invention discloses a signal overload protection method in ultrasonic equipment, a storage medium and the ultrasonic equipment, wherein the method comprises the steps of collecting cerebral blood flow signals according to preset collection parameters; judging whether the cerebral blood flow signals exist in the first depth range and the second depth range; and when the cerebral blood flow signals exist in the first depth range and the second depth range, adjusting the signal intensity of the cerebral blood flow signals in the second depth range. According to the method and the device, when the cerebral blood flow signals are stored in the first depth range and the second depth range, the cerebral blood flow signals in the second depth range are adjusted, so that the artifact signal strength in a blood flow frequency spectrum diagram generated by the acquired cerebral blood flow signals can be reduced, and the interference of artifacts on normal signals is removed.
Description
Technical Field
The invention relates to the technical field of ultrasound, in particular to a signal overload protection method in an ultrasonic device, a storage medium and the ultrasonic device.
Background
When using an automatic probe for blood flow signal acquisition, a large sampling volume, a sufficiently large initial sampling frequency and a strong power are usually used to ensure that the intracranial blood flow signal can be found quickly in order to obtain a good signal. When a larger sampling volume, a sufficiently large initial sampling frequency and a strong power ratio are adopted, after the ultrasound enters a human body from one side of the skull, the frequency spectrum signal of the blood flow is acquired and can be reflected on the opposite side of the skull base, and the blood flow artifact near the skull base is shown.
In order to solve the above problems, it is common at present that a doctor determines whether blood flows at different depths are artifacts by observing and performing a neck compression experiment, and then manually adjusts acquisition parameters to reduce the artifacts. However, for unattended intelligent ultrasound equipment, it is impossible to determine whether a blood flow signal is a blood flow artifact through a neck compression test or experience, and thus it is impossible to adjust the blood flow artifact.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a signal overload protection method in an ultrasound device, a storage medium, and an ultrasound device, aiming at the shortcomings of the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method of signal overload protection in an ultrasound device, the method comprising:
collecting cerebral blood flow signals according to preset collection parameters;
judging whether cerebral blood flow signals exist in both the first depth range and the second depth range, wherein the lower limit value of the second depth range is larger than the upper limit value of the first depth range;
and when the cerebral blood flow signals exist in the first depth range and the second depth range, adjusting the signal intensity of the cerebral blood flow signals in the second depth range.
The signal overload protection method in the ultrasonic device, wherein the judging whether the cerebral blood flow signals exist in the first depth range and the second depth range specifically includes:
determining a first depth range and a second depth range according to a preset reference depth range and a preset effective depth range, wherein the reference depth range is included in the effective depth range;
and judging whether cerebral blood flow signals exist in the first depth range and the second depth range.
The signal overload protection method in the ultrasonic equipment, wherein the first depth range comprises a range between a lower limit value of an effective depth range and a lower limit value of a reference depth range; the second depth range is a range between an upper limit value of the reference depth range and an upper limit value of the effective depth range.
The signal overload protection method in the ultrasonic device, wherein the adjusting the signal intensity of the cerebral blood flow signal in the second depth range specifically comprises:
and attenuating the signal intensity of the cerebral blood flow signal in the second depth range according to a preset rule.
The signal overload protection method in the ultrasonic device, wherein after the cerebral blood flow signal is acquired according to the preset acquisition parameter and before the cerebral blood flow signal is judged to exist in the first depth range and the second depth range, the method further comprises the following steps:
and adjusting the preset acquisition parameters according to the blood flow information corresponding to the acquired cerebral blood flow signals so as to acquire the cerebral blood flow signals by adopting the adjusted preset acquisition parameters.
The signal overload protection method in the ultrasonic device, wherein the blood flow information includes a blood flow peak value, and the adjusting the preset acquisition parameter according to the blood flow information corresponding to the acquired cerebral blood flow signal specifically includes:
comparing the blood flow peak value with a first preset threshold value and a second preset threshold value, wherein the first preset threshold value and the second preset threshold value are both determined according to the speed range, and the second preset threshold value is larger than the first preset threshold value;
if the peak value of the blood flow is smaller than a first preset threshold value, reducing the speed range;
and if the blood flow peak value is larger than a second preset threshold value, increasing the speed range.
The signal overload protection method in the ultrasonic device, wherein the blood flow information includes blood flow signal intensity, and the adjusting the preset acquisition parameter according to the blood flow information corresponding to the acquired cerebral blood flow signal includes:
obtaining the difference value between the blood flow signal intensity and the background signal intensity;
when the difference value is larger than or equal to a preset threshold value, determining a sampling volume corresponding to the cerebral blood flow signal;
if the sampling volume is larger than a preset volume threshold, reducing the sampling volume, and continuing to execute the step of obtaining the difference value between the blood flow signal intensity and the background signal intensity until the difference value is smaller than the preset threshold, or the sampling volume is smaller than or equal to the preset volume threshold.
The signal overload protection method in the ultrasonic equipment, wherein the adjusting the preset acquisition parameters according to the blood flow information corresponding to the acquired cerebral blood flow signals comprises:
if the sampling volume is smaller than or equal to a preset volume threshold, judging whether the acquisition power ratio corresponding to the cerebral blood flow signal is in a preset interval;
and when the acquisition power ratio is not in a preset power interval, reducing the acquisition power, and continuing to execute the step of acquiring the difference value between the blood flow signal intensity and the background signal intensity until the difference value is smaller than a preset threshold value or the power ratio is in the preset interval.
A computer readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the steps in the signal overload protection method in an ultrasound device as described in any one of the above.
An ultrasound apparatus, comprising: a processor, a memory, and a communication bus; the memory has stored thereon a computer readable program executable by the processor;
the communication bus realizes connection communication between the processor and the memory;
the processor, when executing the computer readable program, implements the steps in the method for signal overload protection in an ultrasound device as described in any one of the above.
Has the advantages that: compared with the prior art, the invention provides a signal overload protection method in ultrasonic equipment, a storage medium and the ultrasonic equipment, wherein the method comprises the steps of collecting cerebral blood flow signals according to preset collection parameters; judging whether the cerebral blood flow signals exist in the first depth range and the second depth range; and when the cerebral blood flow signals exist in the first depth range and the second depth range, adjusting the signal intensity of the cerebral blood flow signals in the second depth range. According to the method and the device, when the cerebral blood flow signals are stored in the first depth range, the cerebral blood flow signals in the second depth range are adjusted, so that the intensity of the artifact signals can be reduced, and the artifact interference in the blood flow frequency spectrogram generated according to the acquired cerebral blood flow signals can be reduced.
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Fig. 1 is a flowchart of a signal overload protection method in an ultrasound device according to the present invention.
Fig. 2 is a schematic diagram of a preset acquisition parameter adjustment process in a signal overload protection method in an ultrasound apparatus according to the present invention.
Fig. 3 is a schematic structural diagram of an ultrasound apparatus provided by the present invention.
Detailed Description
The invention provides a signal overload protection method in ultrasonic equipment, a storage medium and the ultrasonic equipment, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail below by referring to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The invention will be further explained by the description of the embodiments with reference to the drawings.
The present embodiment provides a signal overload protection method in an ultrasound apparatus, which may be applied to apparatuses such as an ultrasound apparatus having a cerebral blood flow acquisition function, as shown in fig. 1, the signal overload protection method in the ultrasound apparatus provided in the present embodiment specifically includes:
and S10, acquiring the cerebral blood flow signals according to preset acquisition parameters.
Specifically, the preset acquisition parameters are default acquisition parameters configured by the ultrasound device for acquiring the cerebral blood flow signals, which are preset. The preset acquisition parameters are stored in the ultrasonic equipment for acquiring the cerebral blood flow signals, and when the ultrasonic equipment is started, the preset acquisition parameters are configured by default by the ultrasonic equipment. It is understood that when the ultrasound apparatus is started, the acquisition parameters of the ultrasound apparatus are adjusted to adjust the acquisition parameters of the ultrasound apparatus to said preset acquisition parameters. In addition, when the ultrasonic equipment adopts preset acquisition parameters to acquire cerebral blood flow, the ultrasonic equipment can acquire cerebral blood flow data. In one possible implementation of this embodiment, the preset acquisition parameters include a speed range, a sampling volume, an acquisition power, and the like, for example, the speed range may be 150cm/s (when the speed range is unidirectional, the unidirectional speed range may be unidirectional 300cm/s), the sampling volume may be 20mm, and the acquisition power may be maximum power 80%.
And S20, judging whether the cerebral blood flow signals exist in the first depth range and the second depth range.
Specifically, the first depth range is used for reflecting the depth range in which the artifact probability of the cerebral blood flow signal is greater than the preset probability threshold, so that whether the cerebral blood flow signal exists in the first depth range can be judged by adopting preset acquisition parameters to acquire the cerebral blood flow signal, and whether the acquired cerebral blood flow signal carries the artifact can be judged.
Further, in an implementation manner of this embodiment, the first depth range is determined according to a reference depth range and an effective depth range corresponding to the ultrasound device, where the effective depth range includes the reference depth range. It will be appreciated that the effective depth range is the range over which the ultrasound device can acquire cerebral blood flow signals, the reference depth range is the range over which the ultrasound device is expected to acquire cerebral blood flow signals, and the reference depth range is a proper subset of the effective depth range. For example, an effective depth range is [ a, b ], a reference depth range is [ a1, b1], then a < a1 and b > b 1.
Further, in an implementation manner of this embodiment, the determining whether the cerebral blood flow signal exists in both the first depth range and the second depth range specifically includes:
s21, determining a first depth range and a second depth range according to a preset reference depth range and a preset effective depth range, wherein the reference depth range is included in the effective depth range;
and S22, judging whether cerebral blood flow signals exist in the first depth range and the second depth range.
Specifically, the first depth range includes a range between a lower limit value of the effective depth range and a lower limit value of the reference depth range, and the second depth range is a range between an upper limit value of the reference depth range and an upper limit value of the effective depth range. In this embodiment, the reference depth range may be 55-75mm, and the effective depth range is 5-135mm, such that the first depth range is 5-55mm, and the second depth range is 75-135 mm. In this embodiment, the first depth range is set as the range between the lower limit value of the effective depth range and the lower limit value of the reference depth range, the second depth range is set as the range between the upper limit value of the reference depth range and the upper limit value of the effective depth range, and whether cerebral blood flow signals exist in both the first depth range and the second depth range is determined, so that the probability that the cerebral blood flow signals do not belong to the depth of the reference depth range include artifacts is increased because the reference depth is the depth range in which normal cerebral blood flow occurs, and therefore when cerebral blood flow signals exist in both the first depth range and the second depth range, it can be determined that the cerebral blood flow signals need to be adjusted to reduce the blood flow artifacts.
And S30, when the cerebral blood flow signals exist in the first depth range and the second depth range, adjusting the signal intensity of the cerebral blood flow signals in the second depth range.
Specifically, the presence of cerebral blood flow signals in both the first depth range and the second depth range means that cerebral blood flow signals are acquired in the first depth range, and cerebral blood flow signals are also acquired in the second depth range. The probability that the cerebral blood flow signal in the first depth range and the cerebral blood flow signal in the second depth range contain the artifact is larger, and the closer to the contralateral skull, the stronger the ultrasonic signal reflected by the skull, namely the stronger the artifact signal. Therefore, the cerebral blood flow signals corresponding to the second depth range can be adjusted, so that the influence of the artifact signals on the cerebral blood flow signals in the second depth range is reduced, and the artifact carried by the frequency spectrogram generated according to the cerebral blood flow signals is reduced. In addition, because of the depth range close to the probe, the influence of the artifact signal on the cerebral blood flow signal is small, so that the cerebral blood flow signal corresponding to the first depth range does not need to be adjusted. Certainly, in practical applications, when the cerebral blood flow signals exist in both the first depth range and the second depth range, it may be further determined whether the cerebral blood flow signals in the first depth range are in a signal overload state, and when the cerebral blood flow signals are in the signal overload state, the signal intensity of the cerebral blood flow signals in the second depth range is adjusted. And when the cerebral blood flow signal is not in the signal overload state, the signal intensity of the cerebral blood flow signal in the second depth range is not adjusted. Wherein the signal overload means that an energy signal between an envelope and a baseline of a spectrogram generated based on cerebral blood flow information of the first depth range is greater than an energy signal of an envelope and a DOP window boundary by more than a predetermined threshold, for example, 8dB or the like.
Further, in an implementation manner of this embodiment, the adjusting the signal intensity of the cerebral blood flow signal in the second depth range specifically includes:
and attenuating the signal intensity of the cerebral blood flow signal in the second depth range according to a preset rule.
Specifically, the preset rule is preset, and a value of the attenuated signal intensity of the cerebral blood flow signal can be determined according to the preset rule, where the preset rule is to attenuate the signal intensity of the cerebral blood flow signal according to a preset proportionality coefficient, that is, to attenuate the signal intensity of the cerebral blood flow signal to be the signal intensity of the cerebral blood flow signal. For example, if the preset scaling factor is 40%, attenuation is performed according to a preset method such that the signal intensity of the cerebral blood flow signal is attenuated to 40% of the signal intensity of the acquired cerebral blood flow signal. In addition, after the signal intensity of the cerebral blood flow signal is attenuated, the cerebral blood flow signal in the second depth range is updated, so that the updated cerebral blood flow signal in the second depth range is displayed on the ultrasonic device. Therefore, by attenuating the signal intensity of the cerebral blood flow signal in the second depth range, the signal intensity of the artifact signal in the cerebral blood flow signal in the second depth range can be attenuated, so that the artifact can not be distinguished by human eyes, and the influence of the artifact on the cerebral blood flow signal is reduced.
Further, in an implementation manner of this embodiment, after the cerebral blood flow signal is acquired according to the preset acquisition parameter and before the cerebral blood flow signal is determined to exist in both the first depth range and the second depth range, the method further includes:
and S20a, adjusting the preset acquisition parameters according to the blood flow information corresponding to the acquired cerebral blood flow signals, so as to acquire the cerebral blood flow signals by adopting the adjusted preset acquisition parameters.
Specifically, the blood flow information is determined according to the acquired cerebral blood flow signal, wherein the blood flow information may include a blood flow peak value and a blood flow signal strength. The preset acquisition parameters comprise speed range, volume and acquisition power. It can be understood that after the cerebral blood flow signal is acquired by the ultrasonic device configured with the preset acquisition parameter, the blood flow information of the cerebral blood flow signal is acquired, the preset acquisition parameter is reversely adjusted according to the blood flow information to obtain the target acquisition parameter, and finally the ultrasonic device acquires the cerebral blood flow signal by using the target acquisition parameter. In addition, it should be noted that, when the target acquisition parameters are not used for acquiring the cerebral blood flow signals, the preset acquisition parameters are used for replacing the target acquisition parameters, and the step of acquiring the cerebral blood flow signals according to the preset acquisition parameters is continuously executed to enter the next automatic adjustment cycle.
Further, in an implementation manner of this embodiment, as shown in fig. 2, the blood flow information includes a blood flow peak value, and the adjusting the preset acquisition parameter according to the blood flow information corresponding to the acquired cerebral blood flow signal specifically includes:
comparing the blood flow peak value with a first preset threshold value and a second preset threshold value, wherein the first preset threshold value and the second preset threshold value are both determined according to the speed range, and the second preset threshold value is larger than the first preset threshold value;
if the peak value of the blood flow is smaller than a first preset threshold value, reducing the speed range;
and if the blood flow peak value is larger than a second preset threshold value, increasing the speed range.
Specifically, the first preset threshold and the second preset threshold are both determined according to a speed range, and the second preset threshold is greater than the first preset threshold, the first preset threshold is used for measuring a lower limit value of whether a blood flow spectrogram corresponding to the cerebral blood flow signal can be completely displayed, and the second preset threshold is used for measuring a lower limit value of whether a blood flow spectrogram corresponding to the cerebral blood flow signal can be completely displayed. It can be understood that when the blood flow peak is smaller than the first preset threshold, the blood flow spectrum corresponding to the cerebral blood flow signal cannot be completely displayed, and when the blood flow peak is larger than the second preset threshold, the blood flow spectrum corresponding to the cerebral blood flow signal cannot be completely displayed. The blood flow peak value can be determined by the blood flow frequency spectrum above the baseline, the blood flow direction needs to be determined when the blood flow peak value is determined, when the blood flow direction is forward, the blood flow peak value can be directly determined according to the blood flow frequency spectrum above the baseline, when the blood flow direction is backward, the blood flow frequency spectrum diagram needs to be turned over by taking the baseline as a symmetry axis, and the blood flow peak value is determined according to the blood flow frequency spectrum diagram obtained by turning over.
Further, when the blood flow peak value is smaller than the first preset threshold, it indicates that the blood flow spectrum corresponding to the cerebral blood flow signal obtained by the current speed range detection cannot be completely displayed, so that the speed range needs to be adjusted at this time, so that the blood flow peak value is larger than the first preset threshold. After the cerebral blood flow signal is acquired, the blood flow peak value corresponding to the cerebral blood flow signal is fixed, so that the first preset threshold value needs to be reduced in order to make the blood flow peak value larger than the first preset threshold value. The first preset threshold is determined according to the speed range, so that when the peak value of the blood flow is smaller than the first preset threshold, the speed range needs to be reduced, namely, the speed range is reduced. Similarly, if the blood flow peak value is larger than a second preset threshold value, the speed range needs to be increased, that is, the speed range is increased. Furthermore, in a possible implementation manner of this embodiment, the first preset threshold may be thirty percent of the speed range, that is, the first preset threshold is 30% of the speed range; the second preset threshold may be eighty percent of the speed range, i.e. the second preset threshold is 80% of the speed range.
Further, in an implementation manner of this embodiment, as shown in fig. 2, the blood flow information includes a blood flow signal strength, and the adjusting the preset acquisition parameter according to the blood flow information corresponding to the acquired cerebral blood flow signal includes:
obtaining the difference value between the blood flow signal intensity and the background signal intensity;
when the difference value is larger than or equal to a preset threshold value, determining a sampling volume corresponding to the cerebral blood flow signal;
if the sampling volume is larger than a preset volume threshold, reducing the sampling volume, and continuing to execute the step of obtaining the difference value between the blood flow signal intensity and the background signal intensity until the difference value is smaller than the preset threshold, or the sampling volume is smaller than or equal to the preset volume threshold;
if the sampling volume is smaller than or equal to a preset volume threshold, judging whether the acquisition power ratio corresponding to the cerebral blood flow signal is in a preset interval;
and when the acquisition power ratio is not in a preset power interval, reducing the acquisition power, and continuing to execute the step of acquiring the difference value between the blood flow signal intensity and the background signal intensity until the difference value is smaller than a preset threshold value or the power ratio is in the preset interval.
Specifically, the blood flow signal strength refers to the signal strength of a valid blood flow signal, and the background signal strength refers to the signal strength of a background noise signal. The difference is the difference between the signal strength of the effective blood flow signal and the signal strength of the background noise signal. The preset threshold is preset and is used for judging whether the background noise information and the effective blood flow signal can be distinguished, when the difference value is larger than or equal to the preset threshold, the background noise and the effective blood flow signal can be distinguished, and at the moment, the preset acquisition parameter does not need to be adjusted; when the difference is smaller than the preset threshold, it indicates that the background noise and the valid blood flow signal cannot be distinguished, and at this time, further determination of the sampling volume and adjustment of the power ratio are required. Furthermore, in one possible implementation manner of the embodiment, the preset threshold may be 8 db.
Further, the preset volume threshold is preset, for example, the preset volume threshold is 12 mm. And when the difference value is greater than or equal to a preset threshold value and the sampling volume is greater than a preset volume threshold value, reducing the sampling volume, and continuing to acquire the difference value between the blood flow signal intensity and the background signal intensity, wherein the blood flow signal intensity and the background signal intensity in the step of continuing to acquire the difference value between the blood flow signal intensity and the background signal intensity are acquired by adopting the adjusted adopted volume. It can be understood that after the acquisition volume is reduced, the cerebral blood flow signal is acquired according to the reduced acquisition volume, and the difference between the cerebral blood flow signal intensity of the newly acquired cerebral blood flow signal and the background signal intensity is calculated.
Further, when the sampling volume is less than or equal to the preset volume threshold, it is determined whether the acquisition power ratio is in a preset interval. The power ratio refers to the percentage of the current acquisition power and the maximum acquisition power, and the preset power interval is preset and used for measuring whether the acquisition power needs to be adjusted or not. For example, the preset power interval is 5% -60%, and the like. When the difference is greater than or equal to the preset threshold and the collection volume is less than or equal to the preset volume threshold, judging whether the collection power ratio is within a preset interval; if the acquisition power ratio is not within the preset interval, the power ratio needs to be reduced, and the step of obtaining the difference value between the blood flow signal intensity and the background signal intensity is continuously executed until the difference value is smaller than a preset threshold value or the power ratio is within the preset interval.
In summary, according to the signal overload protection method in the ultrasound apparatus provided by this embodiment, when the cerebral blood flow signal starts to be acquired, the preset acquisition parameters are adopted to enable the ultrasound apparatus to acquire the cerebral blood flow signal, and after the cerebral blood flow signal is acquired, the speed range, the sampling volume and the acquisition power are adjusted according to the blood flow information of the acquired cerebral blood flow signal, so as to reduce the damage caused by the ultrasound entering the human body and ensure that the signal intensity has the identified signal level. In addition, after speed range, sampling volume and acquisition power are adjusted, according to the acquisition depth corresponding to the acquired cerebral blood flow signal, the cerebral blood flow signal is adjusted to reduce the artifact in the cerebral blood flow signal, wherein according to the acquisition depth corresponding to the acquired cerebral blood flow signal, the artifact in the cerebral blood flow signal is adjusted to reduce the artifact in the cerebral blood flow signal can be automatically subjected to artifact attenuation according to the human anatomy structure.
Based on the signal overload protection method in the ultrasound apparatus, the present embodiment provides a computer-readable storage medium, which stores one or more programs that can be executed by one or more processors to implement the steps in the signal overload protection method in the ultrasound apparatus according to the above embodiment.
Based on the signal overload protection method in the ultrasonic device, the present invention also provides an ultrasonic device, as shown in fig. 3, which includes at least one processor (processor) 20; a display screen 21; and a memory (memory)22, and may further include a communication Interface (Communications Interface) 23 and a bus 24. The processor 20, the display 21, the memory 22 and the communication interface 23 can communicate with each other through the bus 24. The display screen 21 is configured to display a user guidance interface preset in the initial setting mode. The communication interface 23 may transmit information. The processor 20 may call logic instructions in the memory 22 to perform the methods in the embodiments described above.
Furthermore, the logic instructions in the memory 22 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product.
The memory 22, which is a computer-readable storage medium, may be configured to store a software program, a computer-executable program, such as program instructions or modules corresponding to the methods in the embodiments of the present disclosure. The processor 20 executes the functional application and data processing, i.e. implements the method in the above-described embodiments, by executing the software program, instructions or modules stored in the memory 22.
The memory 22 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the ultrasound apparatus, and the like. Further, the memory 22 may include a high speed random access memory and may also include a non-volatile memory. For example, a variety of media that can store program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, may also be transient storage media.
In addition, the specific processes loaded and executed by the storage medium and the instruction processors in the mobile terminal are described in detail in the method, and are not stated herein.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for signal overload protection in an ultrasound device, the method comprising:
collecting cerebral blood flow signals according to preset collection parameters;
judging whether cerebral blood flow signals exist in both the first depth range and the second depth range, wherein the lower limit value of the second depth range is larger than the upper limit value of the first depth range;
and when the cerebral blood flow signals exist in the first depth range and the second depth range, adjusting the signal intensity of the cerebral blood flow signals in the second depth range.
2. The method for signal overload protection in an ultrasound device according to claim 1, wherein the determining whether the cerebral blood flow signal exists in both the first depth range and the second depth range specifically includes:
determining a first depth range and a second depth range according to a preset reference depth range and a preset effective depth range, wherein the reference depth range is included in the effective depth range;
and judging whether cerebral blood flow signals exist in the first depth range and the second depth range.
3. The signal overload protection method in an ultrasonic apparatus according to claim 2, wherein the first depth range includes a range between a lower limit value of an effective depth range and a lower limit value of a reference depth range; the second depth range is a range between an upper limit value of the reference depth range and an upper limit value of the effective depth range.
4. The method for signal overload protection in an ultrasound device according to claim 1, wherein the adjusting the signal intensity of the cerebral blood flow signal in the second depth range is specifically:
and attenuating the signal intensity of the cerebral blood flow signal in the second depth range according to a preset rule.
5. The signal overload protection method for the ultrasonic equipment according to any one of claims 1 to 4, wherein after the cerebral blood flow signal is acquired according to the preset acquisition parameters and before the cerebral blood flow signal is judged to exist in the first depth range and the second depth range, the method further comprises:
and adjusting the preset acquisition parameters according to the blood flow information corresponding to the acquired cerebral blood flow signals so as to acquire the cerebral blood flow signals by adopting the adjusted preset acquisition parameters.
6. The signal overload protection method in the ultrasound apparatus according to claim 5, wherein the blood flow information includes a blood flow peak value, and the adjusting the preset acquisition parameter according to the blood flow information corresponding to the acquired cerebral blood flow signal specifically includes:
comparing the blood flow peak value with a first preset threshold value and a second preset threshold value, wherein the first preset threshold value and the second preset threshold value are both determined according to the speed range, and the second preset threshold value is larger than the first preset threshold value;
if the peak value of the blood flow is smaller than a first preset threshold value, reducing the speed range;
and if the blood flow peak value is larger than a second preset threshold value, increasing the speed range.
7. The signal overload protection method in the ultrasonic device according to claim 5 or 6, wherein the blood flow information includes a blood flow signal strength, and the adjusting the preset acquisition parameter according to the blood flow information corresponding to the acquired cerebral blood flow signal includes:
obtaining the difference value between the blood flow signal intensity and the background signal intensity;
when the difference value is larger than or equal to a preset threshold value, determining a sampling volume corresponding to the cerebral blood flow signal;
if the sampling volume is larger than a preset volume threshold, reducing the sampling volume, and continuing to execute the step of obtaining the difference value between the blood flow signal intensity and the background signal intensity until the difference value is smaller than the preset threshold, or the sampling volume is smaller than or equal to the preset volume threshold.
8. The signal overload protection method in the ultrasound device according to claim 7, wherein the adjusting the preset acquisition parameter according to the blood flow information corresponding to the acquired cerebral blood flow signal includes:
if the sampling volume is smaller than or equal to a preset volume threshold, judging whether the acquisition power ratio corresponding to the cerebral blood flow signal is in a preset interval;
and when the acquisition power ratio is not in a preset power interval, reducing the acquisition power, and continuing to execute the step of acquiring the difference value between the blood flow signal intensity and the background signal intensity until the difference value is smaller than a preset threshold value or the power ratio is in the preset interval.
9. A computer readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the steps of the signal overload protection method in the ultrasound apparatus according to any one of claims 1 to 8.
10. An ultrasound device, comprising: a processor, a memory, and a communication bus;
the memory has stored thereon a computer readable program executable by the processor;
the communication bus realizes connection communication between the processor and the memory;
the processor, when executing the computer readable program, implements the steps in the method for signal overload protection in an ultrasound device as claimed in any of claims 1 to 8.
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