CN117643479A - Ultrasonic blood flow detection method, device, equipment and storage medium for inner cavity - Google Patents
Ultrasonic blood flow detection method, device, equipment and storage medium for inner cavity Download PDFInfo
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Abstract
The invention relates to the technical field of medical ultrasonic imaging, and discloses an ultrasonic blood flow detection method, device and equipment for an inner cavity and a storage medium. The method is applied to ultrasonic diagnostic equipment, wherein an ultrasonic probe of the ultrasonic diagnostic equipment comprises a first ultrasonic transducer and a second ultrasonic transducer, the relative positions of the first ultrasonic transducer and the second ultrasonic transducer are fixed, and an included angle of an ultrasonic emission direction is an acute angle; the method comprises the following steps: obtaining a tissue structure image around the inner cavity by using a first ultrasonic transducer; determining a target blood vessel according to the tissue structure image; when the position of the ultrasonic probe is adjusted to the target position (the distance between the first ultrasonic transducer and the target blood vessel is nearest, and the included angle between the ultrasonic transmitting direction of the first ultrasonic transducer and the target blood vessel is 90 degrees+/-alpha), the blood flow information in the target blood vessel is acquired by utilizing the second ultrasonic transducer. The invention enables the inner cavity ultrasonic probe to be accurately close to the blood vessel position, realizes inner cavity blood flow detection and improves blood flow detection accuracy.
Description
Technical Field
The invention relates to the technical field of medical ultrasonic imaging, in particular to an ultrasonic blood flow detection method, an ultrasonic blood flow detection device, ultrasonic blood flow detection equipment and an ultrasonic blood flow detection storage medium for an inner cavity.
Background
Ultrasonic color blood flow imaging is a non-invasive medical imaging technology, and dynamic changes of human blood flow can be observed and estimated in real time through the propagation and reflection principles of ultrasonic waves. The method combines ultrasonic imaging and Doppler technology, can provide more detailed and accurate blood flow information, and plays a vital role in diagnosis and treatment of vascular diseases.
The principle of ultrasound color flow imaging is based on the doppler effect. The doppler effect is the change in the frequency of an acoustic wave that occurs when there is relative motion between the source of the transmitted ultrasonic wave and the source of the reflected acoustic wave. From the doppler effect, the velocity and direction of blood movement can be inferred by measuring the frequency change of the sound wave.
However, current color ultrasound (i.e., ultrasound color doppler) is mainly body surface detection, that is, blood flow information is detected by bringing an ultrasound probe into contact with a body surface and then transmitting ultrasound into the body. However, this way of detecting blood flow information generally has a long distance between the ultrasound emission location and the blood flow, and the propagation of ultrasound is greatly affected by the tissue, thus resulting in limited accuracy of the detection result.
Even if the size of the ultrasonic probe is made small and is sent into the body through a human body lumen (for example, a digestive tract lumen) (in order to distinguish from an ultrasonic device for realizing ultrasonic detection by placing an existing ultrasonic probe on the body surface, an ultrasonic device through which the ultrasonic probe can enter the body through the human body lumen is referred to as a lumen ultrasonic diagnostic device herein), blood flow information detection of a blood vessel can be realized by failing to adjust the probe position because the blood vessel position cannot be determined.
Disclosure of Invention
In view of the above, the present invention provides an ultrasonic blood flow detection method, apparatus, device and storage medium for an inner lumen, so as to solve the problem that blood flow information detection cannot be achieved due to the fact that blood vessel position cannot be determined when an ultrasonic probe is sent into a body to detect the blood flow information.
In a first aspect, the present invention provides an ultrasonic blood flow detection method for an inner cavity, which is applied to an ultrasonic diagnostic apparatus, wherein an ultrasonic probe of the ultrasonic diagnostic apparatus includes a first ultrasonic transducer and a second ultrasonic transducer, the relative positions of the first ultrasonic transducer and the second ultrasonic transducer are fixed, and an included angle between ultrasonic emission directions is greater than 0 and less than 90 degrees; the method comprises the following steps:
obtaining a tissue structure image around the inner cavity by using a first ultrasonic transducer;
determining a target blood vessel according to the tissue structure image;
when the position of the ultrasonic probe is adjusted to the target position, acquiring blood flow information in a target blood vessel by using a second ultrasonic transducer;
when the ultrasonic probe is positioned at the target position, the distance between the first ultrasonic transducer and the target blood vessel is smaller than or equal to a preset distance threshold, and the included angle between the ultrasonic transmitting direction of the first ultrasonic transducer and the target blood vessel when the ultrasonic probe transmits ultrasonic to the target blood vessel is 90 degrees+/-alpha, wherein alpha is smaller than or equal to a preset angle threshold.
In an alternative embodiment, the ultrasound diagnostic apparatus is provided to an ultrasound endoscope system.
In an alternative embodiment, the ultrasonic diagnostic apparatus further comprises a cylindrical carrier, a V-shaped groove is provided on a side surface of the cylindrical carrier, the first ultrasonic transducer is fixed to one side wall of the V-shaped groove, and the second ultrasonic transducer is fixed to a top surface of the cylindrical carrier.
In an alternative embodiment, obtaining an image of tissue structure surrounding the lumen using the first ultrasound transducer comprises:
controlling the first ultrasonic transducer to rotate;
controlling the first ultrasonic transducer to emit ultrasonic waves and receive a first echo in the process of rotating the first ultrasonic transducer;
and obtaining a tissue structure image according to the first echo.
In an alternative embodiment, the first ultrasound transducer is a single or multiple element; and/or the number of the groups of groups,
the second ultrasonic transducer is a single array element or a plurality of array elements.
In an alternative embodiment, in the case that the second ultrasound transducer is a multi-array element, acquiring the blood flow information in the target blood vessel by using the second ultrasound transducer includes:
controlling the second ultrasonic transducer to emit continuous waves;
controlling a second ultrasonic transducer to receive a second echo of the continuous wave;
and acquiring blood flow information in the target blood vessel according to the second echo.
In an alternative embodiment, acquiring blood flow information within the target vessel from the second echo comprises:
acquiring frequency information of the second echo according to the second echo;
and calculating and acquiring blood flow information in the target blood vessel according to the frequency information of the second echo.
In an alternative embodiment, in the case that the second ultrasound transducer is a single array element, acquiring the blood flow information in the target blood vessel by using the second ultrasound transducer includes:
controlling the second ultrasonic transducer to emit pulse waves;
controlling the second ultrasonic transducer to receive a third echo of the pulse wave;
and acquiring blood flow information in the target blood vessel according to the third echo.
In an alternative embodiment, acquiring blood flow information within the target vessel from the third echo comprises:
acquiring frequency information of the third echo according to the third echo;
and calculating and acquiring blood flow information in the target blood vessel according to the frequency information of the third echo.
In an alternative embodiment, the scan frame rate of the first ultrasound transducer is fixed; and/or the number of the groups of groups,
the scan frame rate of the second ultrasound transducer is adjusted according to the blood flow velocity.
In a second aspect, the invention provides an ultrasonic blood flow detection device for an inner cavity, which is applied to ultrasonic diagnostic equipment, wherein an ultrasonic probe of the ultrasonic diagnostic equipment comprises a first ultrasonic transducer and a second ultrasonic transducer, the relative positions of the first ultrasonic transducer and the second ultrasonic transducer are fixed, and an included angle between ultrasonic emission directions is more than 0 and less than 90 degrees; the device comprises:
the tissue structure imaging module is used for obtaining tissue structure images around the inner cavity by using the first ultrasonic transducer;
the blood vessel positioning module is used for determining a target blood vessel according to the tissue structure image;
the blood flow information detection module is used for acquiring blood flow information in a target blood vessel by using the second ultrasonic transducer when the position of the ultrasonic probe is adjusted to the target position;
when the ultrasonic probe is positioned at the target position, the distance between the first ultrasonic transducer and the target blood vessel is smaller than or equal to a preset distance threshold, and the included angle between the ultrasonic transmitting direction of the first ultrasonic transducer and the target blood vessel when the ultrasonic probe transmits ultrasonic to the target blood vessel is 90 degrees+/-alpha, wherein alpha is smaller than or equal to a preset angle threshold.
In a third aspect, the present invention provides an ultrasonic diagnostic apparatus comprising: the device comprises a memory and a processor, wherein the memory and the processor are in communication connection, the memory stores computer instructions, and the processor executes the computer instructions so as to execute the ultrasonic blood flow detection method for the inner cavity according to the first aspect or any corresponding embodiment.
In a fourth aspect, the present invention provides a computer readable storage medium having stored thereon computer instructions for causing a computer to perform the ultrasound blood flow detection method for an internal cavity of the first aspect or any of its corresponding embodiments.
The ultrasonic blood flow detection method, the ultrasonic blood flow detection device, the ultrasonic blood flow detection equipment and the ultrasonic blood flow detection storage medium for the inner cavity are used for realizing blood flow detection in blood vessels around the inner cavity by integrating two ultrasonic transducers on an ultrasonic probe for entering the inner cavity (such as the digestive tract). Specifically, an ultrasonic transducer is utilized to detect an org-chart around an inner cavity, a blood vessel position is obtained according to the org-chart, then an ultrasonic probe is adjusted to enable a distance between a second ultrasonic transducer and a target blood vessel to be as close as possible, so that an ultrasonic propagation distance is reduced, interference is reduced, an ultrasonic emission direction of the first ultrasonic transducer is as perpendicular as possible to the target blood vessel when ultrasonic is emitted to the target blood vessel, and an included angle between the ultrasonic emission directions of the first ultrasonic transducer and the second ultrasonic transducer is larger than 0 and smaller than 90 degrees due to the fact that the relative positions of the first ultrasonic transducer and the second ultrasonic transducer are fixed, so that the ultrasonic emission direction of the second ultrasonic transducer is not perpendicular, and blood flow information in the blood vessel can be obtained by using a Doppler technology.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of an ultrasonic probe according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for ultrasonic blood flow detection of a lumen according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of the position of a first ultrasound transducer scanning an image of tissue structures surrounding an internal cavity, in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of the relative positions of the first ultrasonic transducer and the second ultrasonic transducer with respect to a target blood vessel when the second ultrasonic transducer scans to obtain blood flow information of the target blood vessel according to an embodiment of the present invention;
FIG. 5 is a block diagram of a process for obtaining an image using a first ultrasound transducer and a second ultrasound transducer in accordance with an embodiment of the present invention;
FIG. 6 is a block diagram of an ultrasonic blood flow detection device for a lumen according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a hardware configuration of an ultrasonic diagnostic apparatus according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the related art, a small probe ultrasonic endoscope mainly comprises small probe ultrasonic equipment and endoscope equipment, the outer diameter of a probe is about 2mm, the ultrasonic probe can be sent into the tissue surface to be inspected through an endoscope biopsy channel during operation, and the level of a focus on the wall of a digestive tract can be clearly displayed by injecting airless water as a medium and a diagnosis basis is provided according to different echoes inside the lesion. The current ultrasonic endoscope is only used for obtaining tissue structure imaging, but not used for obtaining blood vessel blood flow information in tissues. This is because, in order to detect blood flow, the probe is required to scan the blood vessel while stationary, and since the probe is positioned in the lumen, the probe is only scanned in a certain direction while stationary, and it is difficult to find the actual position of the blood vessel. The embodiment of the invention provides an ultrasonic blood flow detection method for an inner cavity, which realizes in-vivo Doppler detection, namely in-vivo blood flow information detection.
In accordance with an embodiment of the present invention, there is provided an embodiment of an ultrasound blood flow detection method for a lumen, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a device such as an ultrasound diagnostic device (herein referred to as a lumen ultrasound device in which a probe may enter the body through a lumen such as the alimentary canal) or an ultrasound endoscopic system including a lumen ultrasound device, and, although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order other than that illustrated herein.
In this embodiment, an ultrasonic blood flow detection method for an inner cavity is provided, which can be used in the above-mentioned ultrasonic diagnostic apparatus or ultrasonic endoscope system, referring to fig. 1, an ultrasonic probe 100 of the ultrasonic diagnostic apparatus includes a first ultrasonic transducer 101 and a second ultrasonic transducer 102, where the relative positions of the first ultrasonic transducer 101 and the second ultrasonic transducer 102 are fixed, and an included angle between ultrasonic emission directions is greater than 0 and less than 90 degrees; fig. 2 is a flow chart of a method for ultrasonic blood flow detection of a lumen, as shown in fig. 2, according to an embodiment of the present invention, the flow comprising the steps of:
in step S201, an image of the tissue structure around the lumen is obtained using the first ultrasound transducer 101. The relative positional relationship between the ultrasound probe 100 and the blood vessel 104 at this time can be referred to as fig. 3.
The working principle of an ultrasonic imaging system is as follows: the ultrasonic transducer generates ultrasonic waves under positive and negative high-voltage excitation, when the ultrasonic waves propagate in human tissues, reflection is generated at different acoustic impedance mediums, reflected echoes are converted into electric signals through the transducer, digital signals are formed through amplification, voltage conversion and AD (analog-to-digital) conversion, and then FPGA (field programmable gate array) sampling, detection (IQ demodulation, filtering, modulo calculation and the like), dynamic range and contrast adjustment and the like are sent to an upper computer for post-processing and display, so that a B-mode image, namely a tissue structure image, is formed.
Step S202, determining a target blood vessel according to the tissue structure image.
Specifically, all blood vessels can be extracted according to the characteristics of the blood vessels in the ultrasonic tissue structure image, and then the target blood vessels are selected. The neural network model may also be used to extract blood vessels from the ultrasound tissue structure image. Reference is made in particular to the related art.
Step S203, when the position of the ultrasonic probe is adjusted to the target position, acquiring blood flow information in the target blood vessel by using the second ultrasonic transducer 102;
wherein, when the ultrasonic probe is positioned at the target position, the distance between the first ultrasonic transducer 101 and the target blood vessel is smaller than or equal to a preset distance threshold value, and the included angle between the ultrasonic emission direction of the first ultrasonic transducer 101 and the target blood vessel is 90 degrees + -alpha when the ultrasonic is emitted to the target blood vessel, that is, the included angle between the ultrasonic emission direction of the first ultrasonic transducer 101 and the target blood vessel is between (90 degrees-alpha) and (90 degrees +alpha) (may be 90 degrees-alpha or may be 90 degrees +alpha). Wherein α is less than or equal to a preset angle threshold, which may be, for example, 5 ° or 10 °, i.e., α is less than or equal to 5 °, or α is less than or equal to 10 °.
Specifically, the adjustment of the position of the ultrasonic probe can be realized manually by an operator or can be realized by automatic control of ultrasonic diagnostic equipment. Theoretically, the distance between the first ultrasonic transducer 101 and the target blood vessel should be made as close as possible, and the ultrasonic emission direction of the first ultrasonic transducer 101 when emitting the ultrasonic waves toward the target blood vessel is perpendicular to the target blood vessel. However, given the difficulty in real-world operation and the high cost of implementation, certain deviations are allowed. The preset distance threshold and the preset angle threshold can be determined according to the blood flow detection precision requirement and/or the actual detection scene (the structural design of the probe and the position relation of the blood vessel and the tissue interface). The preset distance threshold value also needs to consider the distance between the target blood vessel and the tissue interface in the inner cavity, and the distance can be determined by the tissue structure image obtained in the last step or the tissue structure image obtained in the ultrasonic probe position adjustment process. When the position of the ultrasonic probe is adjusted, the first ultrasonic transducer can be utilized to acquire the tissue structure image comprising the target blood vessel in real time so as to determine whether the distance between the first ultrasonic transducer 101 and the target blood vessel is smaller than or equal to a preset distance threshold value and whether the included angle between the ultrasonic emission direction of the first ultrasonic transducer 101 and the target blood vessel is 90 degrees+/-alpha when the ultrasonic is emitted to the target blood vessel in real time. When the ultrasonic probe reaches the target position, the included angle between the ultrasonic emission direction of the second ultrasonic transducer 102 and the target blood vessel is 90 degrees + -alpha-theta, wherein theta is the included angle between the ultrasonic emission directions of the first ultrasonic transducer 101 and the second ultrasonic transducer 102, which is larger than 0 and smaller than 90 degrees, and further, the angle range of theta is 30 degrees to 60 degrees. The relative positional relationship between the ultrasound transmission direction 101D of the first ultrasound transducer 101 and the ultrasound transmission direction 102D of the second ultrasound transducer 102 and the blood vessel 104 at this time can be referred to as fig. 4.
In this embodiment, since the ultrasound probe is required to enter the body lumen, the probe size is small, and the distance between the second ultrasound transducer 102 and the first ultrasound transducer 101 is also small. Thus, the second ultrasound transducer 102 may be brought as close as possible to the target vessel by adjusting the position of the ultrasound probe such that the distance between the first ultrasound transducer 101 and the target vessel is as close as possible.
In particular to an ultrasonic Doppler technique for acquiring blood flow information. Ultrasound doppler technology is a technology that studies the doppler effect produced by reflection or scattering of ultrasound waves by moving objects and is widely used clinically in the diagnosis of heart, blood vessels, blood flow and fetal heart rate.
The ultrasonic blood flow detection method for the inner cavity provided by the embodiment realizes blood flow detection in blood vessels around the inner cavity by integrating two ultrasonic transducers on an ultrasonic probe for entering the inner cavity of a body (such as digestive tract). Specifically, an org-chart around the lumen is detected by using an ultrasonic transducer, a blood vessel position is obtained according to the org-chart, then the ultrasonic probe is adjusted so that the distance between the second ultrasonic transducer 102 and the target blood vessel is as close as possible, the ultrasonic propagation distance is reduced, interference is reduced, the ultrasonic emission direction of the first ultrasonic transducer 101 is as vertical as possible to the target blood vessel when ultrasonic is emitted to the target blood vessel, and the ultrasonic emission direction of the second ultrasonic transducer 102 is not vertical because the relative positions of the first ultrasonic transducer 101 and the second ultrasonic transducer 102 are fixed and the included angle of the ultrasonic emission direction is larger than 0 and smaller than 90 degrees, so that the ultrasonic emission direction of the second ultrasonic transducer 102 is not vertical, and blood flow information in the blood vessel can be obtained by using the Doppler technology.
In some alternative embodiments, the ultrasound diagnostic apparatus is provided in an ultrasound endoscope system. The specific reference may be made to the small probe ultrasonic endoscope above, and the details are not repeated here.
In some alternative embodiments, referring to fig. 1, the ultrasonic diagnostic apparatus further includes a cylindrical carrier, a V-shaped groove is formed on a side surface of the cylindrical carrier, the first ultrasonic transducer 101 is fixed to one side wall of the V-shaped groove, and the second ultrasonic transducer 102 is fixed to a top surface of the cylindrical carrier. In other embodiments, the V-shaped groove may be formed in other forms such as a U-shaped groove, a square groove, or a circular groove.
In this embodiment, the second ultrasonic transducer 102 is fixed to the top surface of the cylindrical carrier, which emits ultrasonic waves along the axis of the cylindrical carrier. The direction of the ultrasonic wave emission of the first ultrasonic transducer 101 fixed to one side wall of the V-shaped groove makes an angle with the axis of the cylindrical carrier.
In addition, the whole cylindrical carrier can be cylindrical, and a cylindrical shell is sleeved outside the cylindrical carrier for protecting the ultrasonic transducer.
In other alternative embodiments, the first ultrasonic transducer 101 may be directly fixed to the side of the cylindrical carrier, and in particular, the side of the cylindrical carrier may be provided with a plane parallel or nearly parallel to the axis of the cylindrical carrier for mounting and fixing the first ultrasonic transducer 101, the size of the plane being sufficient for mounting the first ultrasonic transducer 101. The included angle between the top surface of the cylindrical carrier and the plane may be set to θ, and the lowest point of the top surface is closest to the plane.
In some alternative embodiments, using the first ultrasound transducer 101 to obtain an image of tissue structure surrounding the lumen, includes:
controlling the first ultrasonic transducer 101 to rotate; if the first ultrasonic transducer 101 is fixed on the cylindrical carrier as described above, the first ultrasonic transducer 101 can be controlled to rotate about the axis of the cylindrical carrier.
During the rotation of the first ultrasonic transducer 101, the first ultrasonic transducer 101 is controlled to transmit ultrasonic waves and receive a first echo;
and obtaining a tissue structure image according to the first echo.
In this embodiment, in the case where the first ultrasonic transducer 101 is fixed to the cylindrical carrier as described above, the ultrasonic diagnostic apparatus may further include a driving device, for example, a motor, which may drive the cylindrical carrier to rotate 360 degrees around the axis, and the first ultrasonic transducer 101 located on the side of the cylindrical carrier also rotates 360 degrees around the axis of rotation of the cylindrical carrier under the drive of the cylindrical carrier, so that a tissue structure image of 360 degrees around the inner cavity may be obtained.
Specifically, the specific process of obtaining an image of the tissue structure surrounding the lumen using the first ultrasound transducer 101 can be seen in fig. 5: and B scanning control, namely a transmission control unit for controlling the first ultrasonic transducer to send out a transmission control signal, and then generating high-voltage excitation to control the first ultrasonic transducer to transmit ultrasonic waves in response to the transmission control signal. And then, the first ultrasonic transducer receives ultrasonic echoes, packages the ultrasonic echoes after being processed by an analog-to-digital conversion (ADC) functional module, a receiving control module, a data preprocessing module and B data, uploads the packaged ultrasonic echoes to an upper computer for post-processing to obtain image data, and finally displays the obtained image data.
In this embodiment, the first ultrasonic transducer 101 may be a single array element or multiple array elements. When the first ultrasonic transducer 101 is a plurality of array elements, the plurality of array elements may be arranged in a plane.
In addition, the second ultrasonic transducer 102 may be a single array element or may be multiple array elements. When the second ultrasonic transducer 102 is a plurality of array elements, the plurality of array elements may be arranged in a plane.
In one alternative embodiment, the second ultrasonic transducer 102 is a single array element;
acquiring blood flow information within the target vessel with the second ultrasound transducer 102 includes:
controlling the second ultrasonic transducer 102 to emit a Pulse Wave (PW);
controlling the second ultrasonic transducer 102 to receive a third echo of the pulse wave;
and acquiring blood flow information in the target blood vessel according to the third echo.
Wherein obtaining blood flow information in the target vessel from the third echo comprises:
acquiring frequency information of the third echo according to the third echo;
and calculating and acquiring blood flow information in the target blood vessel according to the frequency information of the third echo.
The Doppler frequency of blood flow can be calculated according to the following equation:
f＝(c+v r )/(c+v s )*f 0 ；f d ＝f-f 0 ；
blood flow velocity calculation formula: v (t) =c×f d /(2*f 0 *cos(90°-θ))；
c: the propagation velocity of ultrasound in tissue;
v r : the velocity of the receiver relative to the medium, i.e. the velocity of the blood relative to the tissue, is positive and negative when the blood flow moves towards the probe;
v s : the velocity of the sound source relative to the medium, i.e. the velocity of the probe relative to the tissue, is positive and negative when the direction of movement of the probe is away from the blood flow; in this embodiment, the probe is stationary or moving negligible relative to the tissue, v s Zero.
f 0 : a transmit wave center frequency;
f: the received frequency;
θ: an included angle of the ultrasonic emission directions of the first ultrasonic transducer 101 and the second ultrasonic transducer 102;
f d : doppler frequency, maximum PRF/2, PRF is pulse repetition interval.
Specifically, the specific process of obtaining blood flow information in a blood vessel using the second ultrasound transducer 102 may be described with reference to fig. 5: and PW scanning control, namely a transmission control unit for controlling the second ultrasonic transducer to send out a transmission control signal, and then generating high-voltage excitation to control the second ultrasonic transducer to transmit pulse ultrasonic waves in response to the transmission control signal. And then, the second ultrasonic transducer receives ultrasonic echo, packages after being processed by an analog-to-digital conversion (ADC) functional module, a receiving control module, a data preprocessing module and PW data, uploads the processed PW data to an upper computer for post-processing to obtain image data for indicating blood flow information, and finally displays the obtained blood flow information image data.
In another alternative embodiment, the second ultrasonic transducer 102 is a multi-array element;
acquiring blood flow information within the target vessel with the second ultrasound transducer 102 includes:
controlling the second ultrasonic transducer 102 to emit a Continuous Wave (CW);
controlling the second ultrasonic transducer 102 to receive a second echo of the continuous wave;
and acquiring blood flow information in the target blood vessel according to the second echo.
Specifically, acquiring blood flow information within the target vessel from the second echo includes:
acquiring frequency information of the second echo according to the second echo;
and calculating and acquiring blood flow information in the target blood vessel according to the frequency information of the second echo.
The process of acquiring blood flow information by transmitting Continuous Wave (CW) is referred to the above process of acquiring blood flow information by pulse wave, and will not be described herein.
That is, in the embodiment of the present invention, the blood flow may be detected in PW (pulse wave) mode using a single array element, or in CW (continuous wave) mode using a plurality of array elements.
In some alternative embodiments, the scanning frame rates of the first ultrasonic transducer 101 and the second ultrasonic transducer 102 are controlled separately, the scanning frame rate of the first ultrasonic transducer 101 is fixed, the scanning frame rate of the second ultrasonic transducer 102 is adjusted according to the blood flow velocity, and when the blood flow velocity is faster, the scanning frame rate of the second ultrasonic transducer 102 is higher.
In the present embodiment, the transmission and reception of the first ultrasonic transducer 101 and the second ultrasonic transducer 102 are controlled separately, that is, the driving signals of the first ultrasonic transducer 101 and the second ultrasonic transducer 102 are separated. The first ultrasonic transducer 101 is used to complete a B-image scan and the second ultrasonic transducer 102 is used to complete an ultrasonic doppler scan. Under the condition that the frame rate of the B image is unchanged, the ultrasonic Doppler scanning period can be adjusted in real time so as to adapt to different blood flow speeds. The specific manner of adjusting the scanning frame rate of the second ultrasonic transducer 102 according to the blood flow velocity may be implemented according to a pre-acquired corresponding relation or a corresponding relation table, and may refer to a related technology, which is not described herein again.
In this embodiment, an ultrasonic blood flow detection device for an inner cavity is further provided, and the device is used to implement the foregoing embodiments and preferred embodiments, which have been described and will not be repeated. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
The embodiment provides an ultrasonic blood flow detection device for an inner cavity, which is applied to ultrasonic diagnostic equipment, wherein an ultrasonic probe of the ultrasonic diagnostic equipment comprises a first ultrasonic transducer and a second ultrasonic transducer, the relative positions of the first ultrasonic transducer and the second ultrasonic transducer are fixed, and an included angle of an ultrasonic emission direction is larger than 0 and smaller than 90 degrees; as shown in fig. 6, the apparatus includes:
a tissue structure imaging module 601, configured to obtain a tissue structure image around the inner cavity by using the first ultrasonic transducer;
a vessel localization module 602, configured to determine a target vessel according to the tissue structure image;
the blood flow information detection module 603 is configured to acquire blood flow information in a target blood vessel by using the second ultrasonic transducer when the position of the ultrasonic probe is adjusted to the target position;
when the ultrasonic probe is positioned at the target position, the distance between the first ultrasonic transducer and the target blood vessel is smaller than or equal to a preset distance threshold, and the included angle between the ultrasonic transmitting direction of the first ultrasonic transducer and the target blood vessel when the ultrasonic probe transmits ultrasonic to the target blood vessel is 90 degrees+/-alpha, wherein alpha is smaller than or equal to a preset angle threshold.
In some alternative embodiments, the tissue structure imaging module 601 comprises:
the driving unit is used for controlling the first ultrasonic transducer to rotate;
the first ultrasonic transducer control unit is used for controlling the first ultrasonic transducer to emit ultrasonic waves and receive first echoes in the process of rotating the first ultrasonic transducer;
the first signal analysis unit is used for obtaining the tissue structure image according to the first echo.
In some alternative embodiments, the scan frame rate of the first ultrasound transducer is fixed and the scan frame rate of the second ultrasound transducer is adjusted based on blood flow velocity.
In some alternative embodiments, the first ultrasound transducer is a single or multiple array element; and/or the number of the groups of groups,
the second ultrasonic transducer is a single array element or a plurality of array elements.
In some alternative embodiments, the second ultrasound transducer is a multi-array element;
the blood flow information detection module 603 includes:
the second ultrasonic transducer control unit is used for controlling the second ultrasonic transducer to emit continuous waves;
the second ultrasonic transducer control unit is also used for controlling the second ultrasonic transducer to receive a second echo of the continuous wave;
and the second signal analysis unit is used for acquiring blood flow information in the target blood vessel according to the second echo.
In some optional embodiments, the second signal analysis unit is specifically configured to obtain frequency information of the second echo according to the second echo; and calculating and acquiring blood flow information in the target blood vessel according to the frequency information of the second echo.
In some alternative embodiments, the second ultrasound transducer is a single array element; the blood flow information detection module 603 includes:
the second ultrasonic transducer control unit is used for controlling the second ultrasonic transducer to emit pulse waves;
the second ultrasonic transducer control unit is also used for controlling the second ultrasonic transducer to receive a third echo of the pulse wave;
and the third signal analysis unit is used for acquiring blood flow information in the target blood vessel according to the third echo.
In some optional embodiments, the third signal analysis unit is specifically configured to obtain frequency information of the third echo according to the third echo; and calculating and acquiring blood flow information in the target blood vessel according to the frequency information of the third echo.
Further functional descriptions of the above respective modules and units are the same as those of the above corresponding embodiments, and are not repeated here.
The ultrasound flow detection device for lumens in this embodiment is presented in the form of functional units, where the units refer to ASIC (Application Specific Integrated Circuit ) circuits, processors and memories executing one or more software or fixed programs, and/or other devices that can provide the above-described functionality.
The embodiment of the invention also provides ultrasonic diagnostic equipment, which is provided with the ultrasonic blood flow detection device for the inner cavity shown in the figure 6.
Referring to fig. 7, fig. 7 is a schematic structural view of an ultrasonic diagnostic apparatus according to an alternative embodiment of the present invention, as shown in fig. 7, the ultrasonic diagnostic apparatus includes: one or more processors 10, memory 20, and interfaces for connecting the various components, including high-speed interfaces and low-speed interfaces. The various components are communicatively coupled to each other using different buses and may be mounted on a common motherboard or in other manners as desired. The processor may process instructions executing within the ultrasound diagnostic apparatus, including instructions stored in or on memory to display graphical information of the GUI on an external input/output device, such as a display device coupled to the interface. In some alternative embodiments, multiple processors and/or multiple buses may be used, if desired, along with multiple memories and multiple memories. One processor 10 is illustrated in fig. 7.
The processor 10 may be a central processor, a network processor, or a combination thereof. The processor 10 may further include a hardware chip, among others. The hardware chip may be an application specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general-purpose array logic, or any combination thereof.
Wherein the memory 20 stores instructions executable by the at least one processor 10 to cause the at least one processor 10 to perform a method for implementing the embodiments described above.
The memory 20 may include a storage program area that may store an operating system, at least one application program required for functions, and a storage data area; the storage data area may store data created according to the use of the ultrasonic diagnostic apparatus, or the like. In addition, the memory 20 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory located remotely from the processor 10, which may be connected to the ultrasound diagnostic apparatus via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk, or solid state disk; the memory 20 may also comprise a combination of the above types of memories.
The ultrasonic diagnostic apparatus further comprises an input device 30 and an output device 40. The processor 10, memory 20, input device 30, and output device 40 may be connected by a bus or other means, for example in fig. 7.
The input device 30 may receive input numeric or character information and generate key signal inputs related to user settings and function controls of the ultrasonic diagnostic apparatus, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, a pointer stick, one or more mouse buttons, a track ball, a joystick, and the like. The output means 40 may include a display device, auxiliary lighting means (e.g., LEDs), tactile feedback means (e.g., vibration motors), and the like. Such display devices include, but are not limited to, liquid crystal displays, light emitting diodes, displays and plasma displays. In some alternative implementations, the display device may be a touch screen.
The ultrasonic diagnostic apparatus further comprises a communication interface for the ultrasonic diagnostic apparatus to communicate with other apparatuses or a communication network.
The embodiments of the present invention also provide a computer readable storage medium, and the method according to the embodiments of the present invention described above may be implemented in hardware, firmware, or as a computer code which may be recorded on a storage medium, or as original stored in a remote storage medium or a non-transitory machine readable storage medium downloaded through a network and to be stored in a local storage medium, so that the method described herein may be stored on such software process on a storage medium using a general purpose computer, a special purpose processor, or programmable or special purpose hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, a solid state disk or the like; further, the storage medium may also comprise a combination of memories of the kind described above. It will be appreciated that a computer, processor, microprocessor controller or programmable hardware includes a storage element that can store or receive software or computer code that, when accessed and executed by the computer, processor or hardware, implements the methods illustrated by the above embodiments.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (10)
1. The ultrasonic blood flow detection method for the inner cavity is characterized by being applied to ultrasonic diagnostic equipment, wherein an ultrasonic probe of the ultrasonic diagnostic equipment comprises a first ultrasonic transducer and a second ultrasonic transducer, the relative positions of the first ultrasonic transducer and the second ultrasonic transducer are fixed, and an included angle between ultrasonic emission directions is larger than 0 and smaller than 90 degrees; the method comprises the following steps:
obtaining a tissue structure image around the inner cavity by using the first ultrasonic transducer;
determining a target blood vessel according to the tissue structure image;
when the position of the ultrasonic probe is adjusted to a target position, acquiring blood flow information in the target blood vessel by using the second ultrasonic transducer;
when the ultrasonic probe is positioned at a target position, the distance between the first ultrasonic transducer and the target blood vessel is smaller than or equal to a preset distance threshold, and the included angle between the ultrasonic emission direction of the first ultrasonic transducer and the target blood vessel when the ultrasonic probe emits ultrasonic to the target blood vessel is 90 degrees+/-alpha, wherein alpha is smaller than or equal to a preset angle threshold.
2. The method of claim 1, wherein said obtaining an image of tissue structure surrounding an interior lumen with said first ultrasound transducer comprises:
controlling the first ultrasonic transducer to rotate;
controlling the first ultrasonic transducer to emit ultrasonic waves and receive first echoes in the process of rotating the first ultrasonic transducer;
and obtaining the tissue structure image according to the first echo.
3. The method of claim 1, wherein the first ultrasonic transducer is a single or multiple element; and/or the number of the groups of groups,
the second ultrasonic transducer is a single array element or a plurality of array elements.
4. The method of claim 3, wherein, in the case where the second ultrasound transducer is a multi-array element, the acquiring blood flow information within the target vessel with the second ultrasound transducer comprises:
controlling the second ultrasonic transducer to emit continuous waves;
controlling the second ultrasonic transducer to receive a second echo of the continuous wave;
and acquiring blood flow information in the target blood vessel according to the second echo.
5. The method of claim 3, wherein, in the case where the second ultrasound transducer is a single array element, the acquiring blood flow information within the target vessel with the second ultrasound transducer comprises:
controlling the second ultrasonic transducer to emit pulse waves;
controlling the second ultrasonic transducer to receive a third echo of the pulse wave;
and acquiring blood flow information in the target blood vessel according to the third echo.
6. The method of claim 5, wherein said acquiring blood flow information within the target vessel from the third echo comprises:
acquiring frequency information of the third echo according to the third echo;
and calculating and acquiring blood flow information in the target blood vessel according to the frequency information of the third echo.
7. The method of any one of claims 1-6, wherein a scan frame rate of the first ultrasound transducer is fixed; and/or the number of the groups of groups,
the scanning frame rate of the second ultrasonic transducer is adjusted according to the blood flow velocity.
8. The ultrasonic blood flow detection device for the inner cavity is characterized by being applied to ultrasonic diagnostic equipment, wherein an ultrasonic probe of the ultrasonic diagnostic equipment comprises a first ultrasonic transducer and a second ultrasonic transducer, the relative positions of the first ultrasonic transducer and the second ultrasonic transducer are fixed, and an included angle between the ultrasonic emission directions is larger than 0 and smaller than 90 degrees; the device comprises:
the tissue structure imaging module is used for obtaining tissue structure images around the inner cavity by using the first ultrasonic transducer;
the blood vessel positioning module is used for determining a target blood vessel according to the tissue structure image;
the blood flow information detection module is used for acquiring blood flow information in the target blood vessel by using the second ultrasonic transducer when the position of the ultrasonic probe is adjusted to the target position;
when the ultrasonic probe is positioned at a target position, the distance between the first ultrasonic transducer and the target blood vessel is smaller than or equal to a preset distance threshold, and the included angle between the ultrasonic emission direction of the first ultrasonic transducer and the target blood vessel when the ultrasonic probe emits ultrasonic to the target blood vessel is 90 degrees+/-alpha, wherein alpha is smaller than or equal to a preset angle threshold.
9. An ultrasonic diagnostic apparatus, comprising:
a memory and a processor in communication with each other, the memory having stored therein computer instructions that, upon execution, perform the method for ultrasound blood flow detection for a lumen of any one of claims 1 to 7.
10. A computer-readable storage medium having stored thereon computer instructions for causing a computer to perform the ultrasound blood flow detection method for a lumen of any one of claims 1 to 7.
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| CN202311735814.5A CN117643479A (en) | 2023-12-15 | 2023-12-15 | Ultrasonic blood flow detection method, device, equipment and storage medium for inner cavity |
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| CN202311735814.5A CN117643479A (en) | 2023-12-15 | 2023-12-15 | Ultrasonic blood flow detection method, device, equipment and storage medium for inner cavity |
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