CN113082555A - Human body chest and abdomen compression monitoring system, method and application thereof - Google Patents
Human body chest and abdomen compression monitoring system, method and application thereof Download PDFInfo
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Abstract
The disclosure relates to the technical field of medical data monitoring, in particular to a human body chest and abdomen compression monitoring system, a human body chest and abdomen compression monitoring method and application of the human body chest and abdomen compression monitoring system. This human chest abdomen oppression monitoring system includes: the signal acquisition device is used for measuring static pressure information and dynamic pressure change information between the compression device and the body surface of the human body; the data processing device is used for processing the static pressure information and the dynamic pressure change information; and the gated CT imaging device is used for communicating with external CT imaging equipment and transmitting the processed static pressure information and dynamic pressure change information to the external CT imaging equipment for CT imaging. By the aid of the method, the problem of detecting the chest and abdomen compression degree is solved, and the problem of acquiring the breathing curve in the chest and abdomen compression state is solved.
Description
Technical Field
The disclosure relates to the technical field of medical data monitoring, and relates to monitoring of chest and abdomen compression data in a tumor radiotherapy process, in particular to a system and a method for monitoring chest and abdomen compression of a human body and application thereof.
Background
Spontaneous respiration is an important natural physiological sign of a human body, and the respiratory frequency and tidal volume of the spontaneous respiration vary from person to person. In the process of spontaneous respiration of a human body, the relative positions of internal organs in the body can be displaced to different degrees. For patients with thoraco-abdominal tumors, the tumor undergoes significant periodic movement with respiration. For the radiotherapy patients, the respiratory motility of the focus area needs to be accurately evaluated before treatment, and corresponding intervention measures are made to ensure the accurate positioning of the tumor and the accurate delivery of the radiotherapy dose.
A commonly used respiratory motion intervention technique in clinical radiotherapy is abdominal compression, i.e., by means of an abdominal compression plate, an abdominal compression bag, an abdominal compression belt and other devices, the purpose of limiting the respiratory amplitude of the viscera is achieved by compressing the viscera in the abdominal cavity. In order to ensure the abdomen compression consistency of the whole course of radiotherapy, the abdomen compression device is provided with a metering indicating gauge, such as descending height, air bag pressure and the like.
After abdominal compression is applied to a patient undergoing radiotherapy, 4D-CT images of the patient are typically acquired to accurately assess the respiratory motility of the tumor lesion after the abdominal compression. In the process of acquiring 4D-CT images of a patient, the breathing curve of the patient needs to be acquired synchronously, and the current clinical 4D-CT breathing curve acquisition mode mainly takes the indication of the body surface position (such as the chest and the abdomen) of a human body and represents the breathing curve through the periodic ascending and descending change of the body surface position. Fig. 1 is a schematic diagram of 4D-CT imaging under respiratory gating guidance in the prior art, as shown in fig. 1, wherein the lower curve in the diagram is a schematic curve of a respiratory waveform.
The existing abdomen compression device mainly has the following technical problems in clinical use: the method for representing the abdominal compression strength by descending the height or the air pressure of the air bag has low sensitivity, and the somatosensory difference caused by the millimeter-level height distance deviation is very obvious and can not meet the actual requirement more and more; in addition, when the 4D-CT image signals of the patient are acquired, the breathing curve of the patient needs to be acquired synchronously, and after the abdominal compression is applied to the patient, the body surface movement of the chest and the abdomen of the patient is greatly limited, so that the body surface amplitude detection failure phenomenon often occurs, the breathing curve of the patient cannot be acquired effectively, and further the 4D-CT cannot be implemented.
Disclosure of Invention
Technical problem to be solved
In view of the above, it is a primary object of the present disclosure to provide a system and a method for monitoring chest and abdomen compression of a human body and an application thereof, so as to at least partially solve the above technical problems.
(II) technical scheme
One aspect of the present disclosure provides a human chest and abdomen compression monitoring system, including: the signal acquisition device is used for measuring static pressure information and dynamic pressure change information between the compression device and the body surface of the human body; the data processing device is used for processing the static pressure information and the dynamic pressure change information; and the gated CT imaging device is used for communicating with external CT imaging equipment and transmitting the processed static pressure information and dynamic pressure change information to the external CT imaging equipment for CT imaging.
According to an embodiment of the present disclosure, the signal acquisition device is a pressure sensor.
According to the embodiment of the present disclosure, the pressure sensor is a thin film piezoresistive sensor, and the data processing device at least comprises a filter and a processor, wherein: the thin film piezoresistive sensor measures static pressure information and dynamic pressure change information between the compression device and the body surface of the human body through a divider resistor; the filter is used for filtering the static pressure information and the dynamic pressure change information to obtain a direct current component used for representing the static pressure information between the compression device and the body surface of the human body and an alternating current component used for representing the dynamic pressure change information of the pressure changing along with time; the processor extracts static pressure information from the direct current component and extracts respiratory phase information from the alternating current component; and the gated CT imaging device transmits the static pressure information and the respiratory phase information to an external CT imaging device for CT imaging.
According to the embodiment of the present disclosure, the pressure sensor employs a polyvinylidene fluoride (PVDF) piezoelectric sensor, and the data processing device at least includes an amplifier, a filter and a processor, wherein: the polyvinylidene fluoride (PVDF) piezoelectric sensor directly measures dynamic pressure change information of pressure between the compression device and the body surface of a human body along with time change; the amplifier amplifies the dynamic pressure change information; the filter is used for filtering the amplified dynamic pressure change information; the processor obtains static pressure information and respiratory time phase information between the compression device and the body surface of the human body from the filtered dynamic pressure change information; and the gated CT imaging device transmits the static pressure information and the respiratory phase information to an external CT imaging device for CT imaging.
According to the embodiment of the disclosure, the signal acquisition device adopts a single-channel measurement mode or a multi-channel measurement mode to measure the static pressure information and the dynamic pressure change information between the compression device and the body surface of the human body.
According to the embodiment of the disclosure, when the signal acquisition device adopts a multi-channel measurement mode, the signal acquisition device measures static pressure information and dynamic pressure change information of a compression center, upper, lower, left and right different measurement positions to obtain a plurality of channels of measurement signals; the data processing device acquires static pressure information and respiratory time phase information between the compression device and the body surface of the human body from the multi-path measurement signals; and the gated CT imaging device transmits the static pressure information and the respiratory phase information to an external CT imaging device for CT imaging.
According to the embodiment of the disclosure, the gated CT imaging device has an interface for communicating with an external CT imaging device, and is configured to receive an instruction signal sent by the external CT imaging device and return the static pressure information and the respiratory phase information to the external CT imaging device. The instruction signal includes at least one of a start scan signal, an end scan signal, and a start timestamp signal.
In another aspect of the present disclosure, a method for monitoring chest and abdomen compression of a human body is provided, which includes: the signal acquisition device measures static pressure information and dynamic pressure change information between the compression device and the body surface of the human body; the data processing device processes the static pressure information and the dynamic pressure change information; and the gated CT imaging device transmits the processed static pressure information and dynamic pressure change information to an external CT imaging device for CT imaging.
According to this disclosed embodiment, signal acquisition device is pressure sensor, pressure sensor adopts film piezoresistive sensor, signal acquisition device measures static pressure information and the dynamic pressure change information between oppression device and the human body surface, includes: the film piezoresistive sensor measures static pressure information and dynamic pressure change information between the compression device and the body surface of a human body through a divider resistor.
According to an embodiment of the present disclosure, the data processing apparatus at least includes a filter and a processor, and the data processing apparatus processes the static pressure information and the dynamic pressure variation information, including: the filter is used for filtering the static pressure information and the dynamic pressure change information to obtain a direct current component used for representing the static pressure information between the compression device and the body surface of the human body and an alternating current component used for representing the dynamic pressure change information of the pressure changing along with time; the processor extracts static pressure information from the direct current component and respiratory phase information from the alternating current component.
According to the embodiment of the present disclosure, the signal acquisition device is a pressure sensor, the pressure sensor adopts a polyvinylidene fluoride (PVDF) piezoelectric sensor, the signal acquisition device measures static pressure information and dynamic pressure change information between the compression device and the body surface of the human body, and the signal acquisition device includes: the PVDF piezoelectric sensor directly measures dynamic pressure change information of pressure between the compression device and the body surface of a human body along with time change.
According to an embodiment of the present disclosure, the data processing apparatus at least includes an amplifier, a filter and a processor, and the data processing apparatus processes the static pressure information and the dynamic pressure variation information, including: the amplifier amplifies the dynamic pressure change information; the filter is used for filtering the amplified dynamic pressure change information; the processor obtains static pressure information and respiratory time phase information between the compression device and the body surface of the human body from the filtered dynamic pressure change information.
According to the embodiment of the disclosure, the signal acquisition device adopts a single-channel measurement mode or a multi-channel measurement mode to measure the static pressure information and the dynamic pressure change information between the compression device and the body surface of the human body.
According to this disclosed embodiment, signal acquisition device adopts the multichannel measurement mode, signal acquisition device measures static pressure information and the dynamic pressure change information between oppression device and the human body surface, includes: the signal acquisition device measures static pressure information and dynamic pressure change information of the compression center and different measurement positions of the upper, lower, left and right sides to obtain a plurality of paths of measurement signals; and the data processing device acquires static pressure information and respiratory time phase information between the compression device and the body surface of the human body from the multi-path measurement signals.
In yet another aspect of the disclosure, an application of a compression monitoring system for chest and abdomen of a human body in the field of CT imaging is provided.
According to the embodiment of the disclosure, the human body thoracoabdominal compression monitoring system is applied to 4D-CT imaging, specific time phase CT imaging, medical diagnosis CT, interventional CT or radiotherapy CT.
According to the embodiment of the disclosure, the human body thoracoabdominal compression monitoring system is embedded in the compression device, or is attached to a contact surface between the compression device and the human body surface, or is attached to a contact surface between the human body surface and clothes.
(III) advantageous effects
According to the embodiment of the disclosure, the human body thoracoabdominal compression monitoring system, the method and the application thereof provided by the disclosure, the pressure sensor is adopted as the signal acquisition device, the pressure sensor can at least adopt a film piezoresistive sensor or a polyvinylidene fluoride (PVDF) piezoelectric sensor, static pressure information and dynamic pressure change information between the compression device and the body surface of the human body can be accurately measured and acquired, further the compression force of the human body on the thoracoabdominal part is obtained, and the consistency of the thoracoabdominal compression technology in clinical implementation is improved; meanwhile, the static pressure information and the dynamic pressure change information are amplified and filtered by the data processing device, so that the breathing time phase information in a compression state can be effectively extracted, the problem of detecting the chest and abdomen compression degree is effectively solved, and the problem of acquiring the breathing curve in the chest and abdomen compression state is solved.
According to the embodiment of the disclosure, the human thoracoabdominal compression monitoring system, the method and the application thereof, provided by the disclosure, the breathing time phase information in a compression state is effectively extracted by measuring and collecting static pressure information and dynamic pressure change information between the compression device and the human body surface, the success rate of 4D-CT or other gated CT imaging technologies (such as specific time phase CT imaging) driven by a breathing curve is improved, and the application prospect is good in the technical field of thoracoabdominal radiotherapy medical data monitoring.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram of 4D-CT imaging under respiratory gating guidance in the prior art, wherein a curve at the lower part of the diagram is a schematic curve of a respiratory waveform.
Fig. 2 is a schematic diagram of a human thoracoabdominal compression monitoring system according to an embodiment of the present disclosure.
FIG. 3 is a circuit diagram of a thin film piezoresistive sensor according to an embodiment of the present disclosure measuring static pressure information and dynamic pressure change information between a compression device and a body surface of a human body through a voltage divider resistor in a single channel measurement.
FIG. 4 is a schematic diagram of the circuit thin film piezoresistive sensor of FIG. 3, which is based on filtering the DC component from the original voltage signal in a single-channel measurement to characterize the static pressure information between the compression device and the body surface.
FIG. 5 is a schematic diagram of the time phase information filtered from the raw voltage signal to extract dynamic pressure periodic variation information characterizing pressure variation with time based on the circuit thin film piezoresistive sensor shown in FIG. 3 using a single channel measurement.
Fig. 6 is a schematic diagram of a PVDF piezoelectric sensor directly measuring dynamic pressure change information of pressure between a compression device and a human body surface over time according to an embodiment of the disclosure.
Fig. 7 is a flow chart of a method of monitoring chest and abdominal compression in a human in accordance with an embodiment of the present disclosure.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.
All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.
And the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present disclosure. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The use of ordinal numbers such as "S1", "S2", "S3", etc., in the specification and claims to modify a claim element step is not itself intended to imply any previous sequence to the claimed step, nor the order in which a claimed step is sequenced to another claimed step or method of manufacture, but rather the use of a ordinal number is used to allow a claimed step having a certain name to be clearly distinguished from another claimed step.
The embodiment of the disclosure provides a human body chest and abdomen compression monitoring system, a method and an application thereof, wherein a pressure sensor is adopted as a signal acquisition device, the pressure sensor can at least adopt a film piezoresistive sensor or a polyvinylidene fluoride (PVDF) piezoelectric sensor, and can accurately measure and acquire static pressure information and dynamic pressure change information between the compression device and the body surface of a human body, so that the compression force of the human body on the chest and abdomen is obtained, and the consistency of the chest and abdomen compression technology in clinical implementation is improved; meanwhile, the static pressure information and the dynamic pressure change information are amplified and filtered by the data processing device, so that the breathing time phase information in a compression state can be effectively extracted, the problem of detecting the chest and abdomen compression degree is effectively solved, and the problem of acquiring the breathing curve in the chest and abdomen compression state is solved.
Fig. 2 is a schematic view of a human thoracoabdominal compression monitoring system according to an embodiment of the present disclosure, as shown in fig. 2. It should be noted that fig. 2 is only an example of an application scenario in which the embodiment of the present disclosure may be applied to help those skilled in the art understand the technical content of the present disclosure, but does not mean that the embodiment of the present disclosure may not be used in other environments or scenarios.
In fig. 2, the human thoracoabdominal compression monitoring system of the embodiment of the present disclosure includes a signal acquisition device 21, a data processing device 22 and a gated CT imaging device 23, wherein: the signal acquisition device 21 is used for measuring static pressure information and dynamic pressure change information between the compression device and the body surface of the human body; a data processing device 22 for processing the static pressure information and the dynamic pressure change information; and the gated CT imaging device 23 is used for communicating with an external CT imaging device and transmitting the processed static pressure information and dynamic pressure change information to the external CT imaging device for CT imaging.
In the embodiment of the present disclosure, the signal collecting device 21 generally employs a pressure sensor, which is at least a thin film piezoresistive sensor or a PVDF piezoelectric sensor, and because the measurement sensitivity and the noise level of different pressure sensors are different, the original measurement signal needs to be conditioned, such as amplified, filtered, and the like. In practical application, due to the existence of electronic noise, filtering is a necessary signal conditioning item; whether signals need to be amplified depends on the type, sensitivity, measuring range and the like of the sensor, for example, the polyvinylidene fluoride (PVDF) piezoelectric sensor has very weak signal amplitude and needs to be amplified, and the thin film piezoresistive sensor has larger signal amplitude and does not need to be amplified.
When the signal acquisition device 21 employs a thin film piezoresistive sensor, the data processing device 22 at least includes a filter and a processor, wherein: the thin film piezoresistive sensor measures static pressure information and dynamic pressure change information between the compression device and the body surface of the human body through a divider resistor; the filter is used for filtering the static pressure information and the dynamic pressure change information to obtain a direct current component used for representing the static pressure information between the compression device and the body surface of the human body and an alternating current component used for representing the dynamic pressure change information of the pressure changing along with time; the processor extracts static pressure information from the direct current component and extracts respiratory phase information from the alternating current component; the gated CT imaging device 23 transmits the static pressure information and the respiratory phase information to an external CT imaging device for CT imaging.
When the signal acquisition device 21 employs a PVDF piezoelectric sensor, the data processing device 22 at least includes an amplifier, a filter and a processor, wherein: the polyvinylidene fluoride (PVDF) piezoelectric sensor directly measures dynamic pressure change information of pressure between the compression device and the body surface of a human body along with time change; the amplifier amplifies the dynamic pressure change information; the filter is used for filtering the amplified dynamic pressure change information; the processor obtains static pressure information and respiratory time phase information between the compression device and the body surface of the human body from the filtered dynamic pressure change information; the gated CT imaging device 23 transmits the static pressure information and the respiratory phase information to an external CT imaging device for CT imaging.
In the embodiment of the disclosure, the external CT imaging device for CT imaging may be 4D-CT imaging, specific phase CT imaging, or the like.
In the embodiment of the present disclosure, the signal collecting device 21 may adopt a single-channel measurement mode or a multi-channel measurement mode to measure the static pressure information and the dynamic pressure change information between the compression device and the body surface of the human body. In practical application, the signal acquisition device 21 has a function of measuring the pressure of the contact surface, and may adopt a single measurement point (i.e., a single-channel measurement mode), or may adopt multiple measurement points (i.e., a multi-channel measurement mode), and may be used for measuring static pressure or dynamic pressure change.
Because under the oppression state, some sensor overranges probably exist, as an alternative, adopt multichannel measurement mode, the pressure state of the different measuring position of representation on the one hand, for example oppression center and upper and lower left and right sides etc. position, on the other hand is used for avoidding possible signal overrange problem, simultaneously, multichannel signal also can participate in breathing curve extraction jointly.
In the embodiment of the present disclosure, when the signal acquisition device 21 adopts a multi-channel measurement mode, the signal acquisition device 21 measures static pressure information and dynamic pressure change information of a compression center and different measurement positions, up, down, left and right, to obtain a multi-channel measurement signal; the data processing device 22 acquires static pressure information and respiratory time phase information between the compression device and the body surface of the human body from the multi-path measurement signals; the gated CT imaging device 23 transmits the static pressure information and the respiratory phase information to an external CT imaging device for CT imaging.
In the embodiment of the disclosure, when the signal acquisition device 21 adopts a single-channel measurement method, as shown in fig. 3, fig. 3 is a circuit diagram of the thin film piezoresistive sensor according to the embodiment of the disclosure that measures static pressure information and dynamic pressure change information between the compression device and the body surface of the human body through a voltage-dividing resistor in the single-channel measurement method.
FIG. 4 is a schematic diagram of the circuit thin film piezoresistive sensor of FIG. 3, which is based on filtering the DC component from the original voltage signal in a single-channel measurement to characterize the static pressure information between the compression device and the body surface. In fig. 4, the upper curve is the original voltage signal and the lower curve is the filtered extracted dc component, which is used to characterize the static pressure.
FIG. 5 is a schematic diagram of the time phase information filtered from the raw voltage signal to extract dynamic pressure periodic variation information characterizing pressure variation with time based on the circuit thin film piezoresistive sensor shown in FIG. 3 using a single channel measurement. In fig. 5, alternating current components are extracted through filtering, and according to the signal period change, the respiration time phase change is represented, the abscissa is time (ms), and the ordinate (0-2 pi) represents the respiration time phase (the trough corresponds to 0/2 pi, and the peak corresponds to pi).
FIG. 6 shows a schematic diagram of a polyvinylidene fluoride (PVDF) piezoelectric sensor directly measuring dynamic pressure change information of pressure change between a compression device and a human body surface over time according to an embodiment of the disclosure. In fig. 6, a curve having a non-sharp peak is a dynamic pressure change condition, a curve having a sharp peak is time phase curve change information, an abscissa is time (ms), and an ordinate (0-2 pi) represents a respiratory phase (a trough corresponds to 0/2 pi, a peak corresponds to pi).
In the embodiment of the present disclosure, the gated CT imaging device 23 has an interface for communicating with an external CT imaging device, and is configured to receive an instruction signal sent by the external CT imaging device, and return the static pressure information and the respiratory phase information to the external CT imaging device, so as to inform the external CT imaging device of which respiratory phase the external CT imaging device is currently located. The instruction signal includes at least one of a start scan signal, an end scan signal, and a start timestamp signal.
When the gated CT imaging device 23 interacts with an external CT imaging device, the external CT imaging device usually has a hardware interface interacting with other devices, the interface model and the communication protocol are custom formats of various manufacturers, and the interaction interface is used to interact with the gated CT imaging device to mutually inform the current time, the start signal acquisition and timestamp, the current breathing condition, the end signal acquisition and timestamp, and the like.
Based on the human thoracic and abdominal compression monitoring system according to the embodiment of the present disclosure shown in fig. 2, fig. 7 shows a flowchart of a human thoracic and abdominal compression monitoring method according to an embodiment of the present disclosure, the method comprising the steps of:
s1: the signal acquisition device measures static pressure information and dynamic pressure change information between the compression device and the body surface of the human body;
s2: the data processing device processes the static pressure information and the dynamic pressure change information;
s3: and the gated CT imaging device transmits the processed static pressure information and dynamic pressure change information to an external CT imaging device for CT imaging.
When the signal acquisition device is a pressure sensor and the pressure sensor adopts a film piezoresistive sensor, the data processing device at least comprises a filter and a processor, and at the moment: in step S1, the signal acquisition device measures static pressure information and dynamic pressure change information between the compression device and the body surface of the human body, and includes: the film piezoresistive sensor measures static pressure information and dynamic pressure change information between the compression device and the body surface of a human body through a divider resistor. In step S2, the data processing device processes the static pressure information and the dynamic pressure change information, and includes: the filter is used for filtering the static pressure information and the dynamic pressure change information to obtain a direct current component used for representing the static pressure information between the compression device and the body surface of the human body and an alternating current component used for representing the dynamic pressure change information of the pressure changing along with time; the processor extracts static pressure information from the direct current component and respiratory phase information from the alternating current component.
When the signal acquisition device is a pressure sensor and the pressure sensor adopts a polyvinylidene fluoride (PVDF) piezoelectric sensor, the data processing device at least comprises an amplifier, a filter and a processor, at the moment: in step S1, the signal acquisition device measures static pressure information and dynamic pressure change information between the compression device and the body surface of the human body, and includes: the PVDF piezoelectric sensor directly measures dynamic pressure change information of pressure between the compression device and the body surface of a human body along with time change. In step S2, the data processing device processes the static pressure information and the dynamic pressure change information, and includes: the amplifier amplifies the dynamic pressure change information; the filter is used for filtering the amplified dynamic pressure change information; the processor obtains static pressure information and respiratory time phase information between the compression device and the body surface of the human body from the filtered dynamic pressure change information.
In the embodiment of the present disclosure, in step S1, the signal acquisition device may adopt a single-channel measurement mode or a multi-channel measurement mode to measure the static pressure information and the dynamic pressure variation information between the compression device and the body surface of the human body.
When signal acquisition device adopts multichannel measurement mode, signal acquisition device measures static pressure information and dynamic pressure change information between oppression device and the human body surface, includes: the signal acquisition device measures static pressure information and dynamic pressure change information of the compression center and different measurement positions of the upper, lower, left and right sides to obtain a plurality of paths of measurement signals; and the data processing device acquires static pressure information between the compression device and the body surface of the human body and the thinking of respiration from the multi-path measurement signals.
Therefore, the system and the method for monitoring the chest and abdomen compression of the human body provided by the embodiment of the disclosure can measure and collect static pressure information and dynamic pressure change information between the compression device and the body surface of the human body more accurately by adopting the film piezoresistive sensor or the polyvinylidene fluoride (PVDF) piezoelectric sensor as the signal collection device, so as to obtain the compression force of the human body on the chest and abdomen, and improve the consistency of the chest and abdomen compression technology in clinical implementation; meanwhile, the static pressure information and the dynamic pressure change information are amplified and filtered by the data processing device, so that the breathing time phase information in a compression state can be effectively extracted, the problem of detecting the chest and abdomen compression degree is effectively solved, and the problem of acquiring the breathing curve in the chest and abdomen compression state is solved.
Based on the human body thoracoabdominal compression monitoring system and the method provided by the embodiment of the disclosure, the disclosure also provides an application of the human body thoracoabdominal compression monitoring system in the field of CT imaging, and the system is particularly applied to 4D-CT imaging, specific time phase CT imaging, medical diagnosis CT, interventional CT or radiotherapy CT and the like. For specific phase CT imaging, compared with 4D-CT to complete whole phase imaging of a human body from inspiration to expiration, in some clinical scenes, only CT images of a specific phase of the human body need to be acquired, for example, the end-inspiration phase and the end-expiration phase are equal, the lung volume is maximum in the end-inspiration phase, and the lung volume is minimum in the end-expiration phase.
In the embodiment of the present disclosure, the compression monitoring system for the chest and abdomen of the human body may be embedded in the compression device, or attached to the contact surface between the compression device and the body surface of the human body, or attached to the contact surface between the body surface of the human body and the clothes.
The present disclosure has been described in detail so far with reference to the accompanying drawings. From the above description, those skilled in the art should clearly recognize the present disclosure.
It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. In addition, the above definitions of the respective elements are not limited to the specific structures, shapes or modes mentioned in the embodiments, and those skilled in the art may easily modify or replace them.
Of course, the present disclosure may also include other parts according to actual needs, and since the parts are not related to the innovation of the present disclosure, the details are not described herein.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the disclosure, various features of the disclosure are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various disclosed aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that is, the claimed disclosure requires more features than are expressly recited in each claim. Rather, as the following claims reflect, disclosed aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this disclosure.
Further, in the drawings or description, the same drawing reference numerals are used for similar or identical parts. Features in various embodiments illustrated in the description may be freely combined to form a new scheme without conflict, and in addition, each claim may be taken alone as an embodiment or the features in various claims may be combined to form a new embodiment. Further, elements or implementations not shown or described in the drawings are of a form known to those of ordinary skill in the art. Additionally, while exemplifications of parameters including particular values may be provided herein, it is to be understood that the parameters need not be exactly equal to the respective values, but may be approximated to the respective values within acceptable error margins or design constraints.
Unless a technical obstacle or contradiction exists, the above-described various embodiments of the present disclosure may be freely combined to form further embodiments, which are all within the scope of protection of the present disclosure.
While the present disclosure has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of the preferred embodiments of the disclosure, and should not be construed as limiting the disclosure. The dimensional proportions in the drawings are merely schematic and are not to be understood as limiting the disclosure.
Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.
The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present disclosure in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present disclosure and are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (18)
1. A human chest and abdomen compression monitoring system, comprising:
the signal acquisition device is used for measuring static pressure information and dynamic pressure change information between the compression device and the body surface of the human body;
the data processing device is used for processing the static pressure information and the dynamic pressure change information;
and the gated CT imaging device is used for communicating with external CT imaging equipment and transmitting the processed static pressure information and dynamic pressure change information to the external CT imaging equipment for CT imaging.
2. The system according to claim 1, wherein said signal acquisition device is a pressure sensor.
3. The system for monitoring thoracoabdominal compression as defined in claim 2, wherein the pressure sensor is a thin film piezoresistive sensor, and the data processing device comprises at least a filter and a processor, wherein:
the thin film piezoresistive sensor measures static pressure information and dynamic pressure change information between the compression device and the body surface of the human body through a divider resistor;
the filter is used for filtering the static pressure information and the dynamic pressure change information to obtain a direct current component used for representing the static pressure information between the compression device and the body surface of the human body and an alternating current component used for representing the dynamic pressure change information of the pressure changing along with time;
the processor extracts static pressure information from the direct current component and extracts respiratory phase information from the alternating current component;
and the gated CT imaging device transmits the static pressure information and the respiratory phase information to an external CT imaging device for CT imaging.
4. The system according to claim 2, wherein said pressure sensor is a PVDF piezoelectric sensor, and said data processing device comprises at least an amplifier, a filter and a processor, wherein:
the polyvinylidene fluoride (PVDF) piezoelectric sensor directly measures dynamic pressure change information of pressure between the compression device and the body surface of a human body along with time change;
the amplifier amplifies the dynamic pressure change information;
the filter is used for filtering the amplified dynamic pressure change information;
the processor obtains static pressure information and respiratory time phase information between the compression device and the body surface of the human body from the filtered dynamic pressure change information;
and the gated CT imaging device transmits the static pressure information and the respiratory phase information to an external CT imaging device for CT imaging.
5. The system according to claim 1, wherein the signal acquisition device measures the static pressure information and the dynamic pressure variation information between the compression device and the body surface of the human body by using a single-channel measurement method or a multi-channel measurement method.
6. The system for monitoring the thoracoabdominal compression of the human body according to claim 5, wherein when the signal acquisition device adopts a multi-channel measurement mode,
the signal acquisition device measures static pressure information and dynamic pressure change information of the compression center and different measurement positions of the upper, lower, left and right sides to obtain a plurality of paths of measurement signals;
the data processing device acquires static pressure information and respiratory time phase information between the compression device and the body surface of the human body from the multi-path measurement signals;
and the gated CT imaging device transmits the static pressure information and the respiratory phase information to an external CT imaging device for CT imaging.
7. The system according to claim 1, wherein the gated CT imaging device has an interface for communicating with an external CT imaging device, and is configured to receive a command signal from the external CT imaging device and return the static pressure information and the respiratory phase information to the external CT imaging device.
8. The system of claim 7, wherein the command signal includes at least one of a start scan signal, an end scan signal, and a start timestamp signal.
9. A human chest and abdomen compression monitoring method applied to the human chest and abdomen compression monitoring system according to any one of claims 1 to 8, comprising:
the signal acquisition device measures static pressure information and dynamic pressure change information between the compression device and the body surface of the human body;
the data processing device processes the static pressure information and the dynamic pressure change information;
and the gated CT imaging device transmits the processed static pressure information and dynamic pressure change information to an external CT imaging device for CT imaging.
10. The method for monitoring chest and abdomen compression as claimed in claim 9, wherein the signal collecting device is a pressure sensor, the pressure sensor is a thin film piezoresistive sensor, and the signal collecting device measures static pressure information and dynamic pressure variation information between the compression device and the body surface of the human body, comprising:
the film piezoresistive sensor measures static pressure information and dynamic pressure change information between the compression device and the body surface of a human body through a divider resistor.
11. The method for monitoring chest and abdominal compression as claimed in claim 10, wherein said data processing device comprises at least a filter and a processor, said data processing device processes said static pressure information and dynamic pressure variation information, comprising:
the filter is used for filtering the static pressure information and the dynamic pressure change information to obtain a direct current component used for representing the static pressure information between the compression device and the body surface of the human body and an alternating current component used for representing the dynamic pressure change information of the pressure changing along with time;
the processor extracts static pressure information from the direct current component and respiratory phase information from the alternating current component.
12. The method for monitoring chest and abdomen compression as claimed in claim 9, wherein the signal acquisition device is a pressure sensor, the pressure sensor is a PVDF piezoelectric sensor, and the signal acquisition device measures static pressure information and dynamic pressure change information between the compression device and the body surface of the human body, comprising:
the PVDF piezoelectric sensor directly measures dynamic pressure change information of pressure between the compression device and the body surface of a human body along with time change.
13. The method of claim 12, wherein the data processing device comprises at least an amplifier, a filter and a processor, and the data processing device processes the static pressure information and the dynamic pressure variation information, and comprises:
the amplifier amplifies the dynamic pressure change information;
the filter is used for filtering the amplified dynamic pressure change information;
the processor obtains static pressure information and respiratory time phase information between the compression device and the body surface of the human body from the filtered dynamic pressure change information.
14. The method for monitoring chest and abdomen compression as claimed in claim 9, wherein the signal acquisition device measures the static pressure information and the dynamic pressure variation information between the compression device and the body surface of the human body by using a single-channel measurement method or a multi-channel measurement method.
15. The method for monitoring chest and abdomen compression as claimed in claim 14, wherein the signal acquisition device adopts a multi-channel measurement method, and the signal acquisition device measures static pressure information and dynamic pressure variation information between the compression device and the body surface of the human body, comprising:
the signal acquisition device measures static pressure information and dynamic pressure change information of the compression center and different measurement positions of the upper, lower, left and right sides to obtain a plurality of paths of measurement signals;
and the data processing device acquires static pressure information and respiratory time phase information between the compression device and the body surface of the human body from the multi-path measurement signals.
16. Use of a human thoracoabdominal compression monitoring system as claimed in any one of claims 1 to 8 in the field of CT imaging.
17. The use of claim 16, wherein the monitoring system is used for 4D-CT imaging, time-phased CT imaging, medical diagnostic CT, interventional CT or radiotherapy CT.
18. The use of claim 16, wherein the compression monitoring system is embedded in the compression device, or attached to the contact surface between the compression device and the body surface of the human body, or attached to the contact surface between the body surface of the human body and the clothing.
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