4D imaging probe and 4D echo imaging system

Abstract

The application discloses a 4D imaging probe and a 4D echo imaging system, and relates to the technical field of medical imaging, in particular to an anti-interference probe. The anti-interference probe comprises a shell, an opening is arranged at the front end of the shell, an acoustic window is arranged at the opening and is in sealing connection with the shell to form a cavity, an ultrasonic transducer is movably arranged in the cavity and faces the acoustic window and is connected with a power mechanism, and a nano-magnetic fluid with magnetic fluid nanoparticles is filled in the cavity. In a working state, the nano-magnetic fluid serves as a medium to absorb electromagnetic waves leaked from the acoustic window to the receiving and transmitting end. The anti-interference probe can protect the receiving and transmitting end of the ultrasonic transducer through the nano-magnetic fluid, avoid interference of external interference electromagnetic waves into the receiving and transmitting end to cause interference of a receiving wave band, and the fluid characteristics of the nano-magnetic fluid will not affect normal ultrasonic wave receiving and processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrasonic probe, more particularly, to a 4D imaging probe. Furthermore, the present application also relates to a 4D echo imaging system comprising the above-mentioned 4D imaging probe. BACKGROUND

[0002] The 4D ultrasonic imaging system utilizes the 4D imaging function of ultrasonic echo, and realizes 4D imaging of the probed part through swing operation of the probe.

[0003] The ultrasonic transducer inside the probe is a device that continuously swings and transmits and receives mechanical waves, so it is impossible to set a close shielding layer outside the ultrasonic transducer. Generally, metal shielding layers are set in different directions outside the ultrasonic transducer. The front end of the probe is provided with an acoustic window, which has a gap with the ultrasonic transducer to facilitate the swing of the ultrasonic transducer. The range of the swing radiation also needs to be set as the acoustic window to facilitate the ultrasonic wave to pass through the acoustic window. Therefore, the area of the acoustic window is very large, and there cannot be any metal shielding, otherwise the diagnostic ultrasonic wave will be blocked. However, because the acoustic window is very large, external interference will also enter the probe through the acoustic window, causing serious impact on the echo signal of the probe, and even causing false images and misjudgment by doctors.

[0004] In summary, how to avoid external interference with the work of the probe is a problem that needs to be solved by the technical personnel in the field at present. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a 4D imaging probe. The anti-interference probe can reduce the interference of external electromagnetic waves on the echo, while not affecting the propagation of ultrasonic echo.

[0006] Another purpose of the present application is to provide a 4D echo imaging system comprising the above-mentioned 4D imaging probe.

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] A 4D imaging probe comprises:

[0009] A shell, the front end of the shell is provided with an opening;

[0010] An acoustic window is arranged at the opening and is sealingly connected with the shell to form a cavity in the probe;

[0011] An ultrasonic transducer is movably arranged in the cavity and faces the acoustic window, and is connected with a power mechanism;

[0012] The nanomagnetic fluid with magnetic fluid nanoparticles is filled in the cavity, and the nanomagnetic fluid acts as a medium to absorb electromagnetic waves leaked from the acoustic window to the receiving end of the ultrasonic transducer in the working state.

[0013] Preferably, the inner wall of the shell is covered with a metal shielding layer.

[0014] Preferably, the acoustic window is a curved window body, the ultrasonic transducer is arranged to swing around a fixed shaft, and the fixed shaft coincides with the center line of the arc center of the curved window body.

[0015] Preferably, the ultrasonic transducer is provided with a plurality of vibration elements, and all the vibration elements are arranged in sequence along the fixed shaft.

[0016] Preferably, the vibration element of the ultrasonic transducer is rotationally connected to a mechanical transmission structure, and the mechanical transmission structure is connected to the power mechanism.

[0017] Preferably, the cross section of the cavity near the acoustic window is larger than the cross section of the cavity away from the acoustic window.

[0018] Preferably, the shell is a hard shell; and / or the acoustic window is a plastic part.

[0019] Preferably, the cavity is provided with a variable-volume expansion cavity, and the expansion cavity is provided with a gas.

[0020] Preferably, the expansion cavity is arranged at one end of the cavity away from the acoustic window, so that at least the space between the acoustic window and the ultrasonic transducer is filled with the nanomagnetic fluid.

[0021] A 4D echo imaging system includes an anti-interference probe, which is the 4D imaging probe of any one of the above.

[0022] During use of the 4D imaging probe provided in the application, if external electromagnetic waves propagate into the anti-interference probe, they encounter the nanomagnetic fluid as a medium after entering the cavity in the probe. The nanomagnetic fluid is composed of many nanoscale magnetic fluid nanoparticles. The interference electromagnetic waves are absorbed by the magnetic fluid nanoparticles, form small magnetic fields in the magnetic fluid nanoparticles, and are converted into small currents. The currents are consumed in the form of heat energy, and the electromagnetic waves are finally consumed in the form of heat energy. The electromagnetic waves are finally consumed in the form of heat energy, and the electromagnetic waves are finally consumed in the form of heat energy.

[0023] The 4D imaging probe provided in the application can protect the receiving end of the vibration element of the ultrasonic transducer by the nanomagnetic fluid, avoid interference of external interference electromagnetic waves into the receiving end to cause interference to the received wave band, and improve the image quality. Moreover, the fluid characteristics of the nanomagnetic fluid do not affect the reception and processing of normal ultrasonic waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] Fig. 1 This is a schematic structural diagram of the 4D imaging probe provided by the present invention;

[0026] Fig. 2 This is a cross-sectional view of the 4D imaging probe provided by the present invention.

[0027] Figs. 1-2 , the reference numerals include:

[0028] 1 is the acoustic window, 2 is the shell, 3 is the metal shielding layer, 4 is the magnetic fluid nanoparticles, 5 is the ultrasonic transducer, and 6 is the power transmission mechanism. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The core of the present invention is to provide a 4D imaging probe, which can reduce the interference of external electromagnetic waves on echoes while not affecting the propagation of ultrasonic echoes.

[0031] Another core of the present invention is to provide a 4D echo imaging system including the above-mentioned 4D imaging probe.

[0032] Please refer to Figs. 1-2 , Fig. 1 This is a structural schematic diagram of a 4D imaging probe provided by the present invention; Fig. 2 This is a cross-sectional view of the 4D imaging probe provided by the present invention.

[0033] The present application provides a 4D imaging probe, which is mainly used for detection in a 4D echo imaging system, hereinafter referred to as an anti-interference probe. The anti-interference probe includes a shell 2, an acoustic window 1 and an ultrasonic transducer 5.

[0034] In the prior art, the inner wall of the shell 2 is covered with a metal shielding layer, and the front end of the shell 2 and the metal shielding layer 3 are both provided with an opening. The metal shielding layer 3 is used to realize electromagnetic wave blocking, so as to avoid external electromagnetic waves from entering the shell and affecting the detection of mechanical waves.

[0035] The sound window 1 is arranged at the opening and is sealingly connected with the shell 2 to form a cavity in the probe. Since the sound window has a large area, external interference electromagnetic waves can enter the probe from the sound window.

[0036] The ultrasonic transducer 5 is movably arranged in the cavity, and the receiving and transmitting ends of the vibration element of the ultrasonic transducer 5 are both directed to the side of the sound window 1 during movement. The ultrasonic transducer 5 is also connected with a power mechanism for controlling the movement speed thereof.

[0037] In the present application, the nanometer magnetic fluid is filled in the cavity to form a medium between the receiving and transmitting ends and the sound window 1. When in the working state, the wave transmission between the sound window 1 and the receiving and transmitting ends can only pass through the nanometer magnetic fluid as the medium. The nanometer magnetic fluid is used to absorb the electromagnetic waves leaked from the sound window 1 to the receiving and transmitting ends of the ultrasonic transducer 5. Specifically, the magnetic fluid has magnetic characteristics and includes magnetic fluid nanoparticles 4. The magnetic fluid nanoparticles 4 can divide and consume the electromagnetic waves, which is equivalent to attenuating the electromagnetic waves and reducing the interference of the electromagnetic waves on the ultrasonic waves. However, since the ultrasonic waves are mechanical waves, the magnetic fluid nanoparticles 4 will not have obvious influence on the mechanical waves. Therefore, the above structure can attenuate the electromagnetic waves without affecting the ultrasonic waves.

[0038] In the present application, the metal shielding layer 3 is not necessarily arranged. The nanometer magnetic fluid can surround the ultrasonic transducer and other circuits in the probe to attenuate the interference electromagnetic waves entering the probe. Of course, if the electromagnetic shielding layer is also arranged, better anti-interference effect can be achieved. The nanometer magnetic fluid and the metal shielding layer 3 form a surrounding effect on the receiving and transmitting ends of the vibration element of the ultrasonic transducer 5. The receiving and transmitting ends emit ultrasonic waves to the sound window 1. The ultrasonic waves are transmitted to the outside of the probe through the nanometer magnetic fluid and the sound window 1 in sequence, act on the part to be scanned, and then generate corresponding echoes. The echoes enter the probe through the sound window 1 and are transmitted to the ultrasonic transducer 5 through the nanometer magnetic fluid. The ultrasonic transducer 5 transmits the received echoes to the host computer for imaging analysis.

[0039] In this process, if there is electromagnetic wave interference outside, most of the interference electromagnetic waves will be blocked by the metal shielding layer 3 and cannot enter the cavity. The interference electromagnetic waves entering the cavity from the sound window 1 will be absorbed by the magnetic fluid nanoparticles 4 in the nanometer magnetic fluid, form a small magnetic field in the magnetic fluid nanoparticles 4, and be converted into a small current, Fig. 2The arrow direction in the figure is an example of the current direction, and the current is consumed in the form of heat energy. Therefore, through the two ways of magnetic loss and dielectric loss, the interference of the radiated electromagnetic wave is finally consumed and presented in the form of heat energy, and finally dissipated into the shell and air through heat transfer.

[0040] The above-mentioned 4D imaging probe provided by the present application can form protection for the receiving end of the vibration element of the ultrasonic transducer 5 through the nanometer magnetic fluid, or the scheme of combining the nanometer magnetic fluid with the metal shielding layer 3, to avoid the interference electromagnetic wave from the outside into the receiving end to cause interference to the received wave band, and will not affect the normal reception and processing of the ultrasonic wave.

[0041] On the basis of the above-mentioned embodiment, the distance from the receiving end of the vibration element of the ultrasonic transducer 5 to the part of the acoustic window 1 towards which it is directed remains equal during the movement of the vibration element.

[0042] Specifically, during the movement of the ultrasonic transducer 5, it will be directed towards different positions of the acoustic window 1, and the distance from the receiving end of the vibration element of the ultrasonic transducer 5 to the position towards which it is directed remains equal. For example, the acoustic window 1 is a planar window, the movement route of the ultrasonic transducer 5 is a straight line, the movement route is parallel to the acoustic window 1, and the receiving end of the vibration element of the ultrasonic transducer 5 is always directed towards the acoustic window 1.

[0043] However, considering the need to establish a 4D spatial model, the movement route is preferably a curved surface, and the shape of the above-mentioned acoustic window 1 is not limited to a planar type, and the movement direction of the ultrasonic transducer 5 is not limited to a straight line.

[0044] In a preferred embodiment, in order to form a spatial three-dimensional effect, the acoustic window 1 can be set as an arc surface window, that is, a part of a cylindrical structure. Correspondingly, the ultrasonic transducer 5 is set to swing around a fixed shaft, and the fixed shaft coincides with the center line of the arc center of the arc surface window.

[0045] Specifically, the ultrasonic transducer 5 swings around the fixed shaft to form a fan-shaped scanning space, and the acoustic window 1 in the space is an arc surface window, and the arc line of the arc surface window is concentrically arranged with the arc line of the fan-shaped swing, that is, during the swing of the ultrasonic transducer 5, the distance from the receiving end of the ultrasonic transducer 5 to the part of the acoustic window 1 towards which it is directed is constant, that is, the emitted ultrasonic wave will reach the position of the acoustic window 1 after the same distance and the same time, and the same ultrasonic wave effect can be achieved.

[0046] Optionally, if the movement direction of the ultrasonic transducer 5 is other curves, the corresponding acoustic window 1 should also be of corresponding shape and size.

[0047] Optionally, if the movement direction of the ultrasonic transducer 5 is a spatial rotation, correspondingly, the acoustic window should be a spherical surface structure.

[0048] Please refer to Fig. 1 andFig. 2 , Fig. 2 As can be seen in FIG. 1, the ultrasonic transducer 5 swings left and right around an axis to form a swing plane identical to the plane in which the acoustic window 1 is located, and a plurality of vibration elements are arranged in turn in a direction perpendicular to the swing plane, so that the scanning planes of the plurality of vibration elements are parallel, and the arc surfaces formed by scanning constitute a concentric arc surface with the arc surface of the acoustic window 1 in FIG. 1. Fig. 2 Fig. 1 As can be seen in FIG. 1, the ultrasonic transducer 5 swings left and right around an axis to form a swing plane identical to the plane in which the acoustic window 1 is located, and a plurality of vibration elements are arranged in turn in a direction perpendicular to the swing plane, so that the scanning planes of the plurality of vibration elements are parallel, and the arc surfaces formed by scanning constitute a concentric arc surface with the arc surface of the acoustic window 1 in FIG. 1.

[0049] Optionally, the number of vibration elements of the ultrasonic transducer 5 is at least 4, and is preferably 21, 24 or 64.

[0050] The number of vibration elements of the ultrasonic transducer 5 of a common ultrasonic probe is usually 21 or 24, of course, the more the number of vibration elements, the better the use effect of the ultrasonic probe, which needs to be set according to the actual use condition.

[0051] The arrangement of the vibration elements can also be in other forms, which are not enumerated here.

[0052] On the basis of any one of the above embodiments, the ultrasonic transducer 5 is rotationally connected to a mechanical transmission structure 6, and the mechanical transmission structure 6 is connected to a power mechanism.

[0053] Specifically, the power mechanism can be an electric motor, specifically a stepping motor, or can be a crankshaft driving system, or can adopt other types of power mechanisms in the prior art.

[0054] Optionally, the acoustic window 1 of the present application is a wide-angle acoustic window 1, that is, it cooperates with the swing of the swing ultrasonic transducer 5, and the wider the swing range, the greater the angle of the acoustic window 1 should be.

[0055] In an ideal state, the cavity will be filled with nanometer magnetic fluid, but considering that thermal expansion and cold contraction will occur during use, if the cavity is in a full state, expansion and even leakage will occur, so in actual use, the nanometer magnetic fluid will not fill the cavity, and a part of the gas space will be reserved as a contraction cavity to ensure that the volume can be changed. The reserved amount of the gas space needs to meet the following conditions.

[0056] The position where the inner wall of the acoustic window 1 contacts the metal shielding layer 3 is a position where electromagnetic waves are easy to penetrate, if the nanometer magnetic fluid cannot completely cover the inner wall of the acoustic window 1, or cannot cover the position where the inner wall of the acoustic window 1 contacts the metal shielding layer 3, electromagnetic waves will still enter the cavity and be transmitted to the transceiving end.

[0057] ​In the normal working state, i.e. when the acoustic window 1 is located at the lower part, the nanometer magnetic fluid needs to filter the waves that pass through the acoustic window 1 to retain the mechanical waves and consume the electromagnetic waves when the nanometer magnetic fluid flows to the acoustic window position. However, in order to increase the accuracy and efficiency of the electromagnetic wave consumption, the connection position between the inner wall of the acoustic window 1 and the inner part of the metal shielding layer 3 completely covers the nanometer magnetic fluid when the device is in the working state.

[0058] Therefore, the cavity is provided with a shrinkage cavity. The shrinkage cavity can be a hard deformable structure such as a compression cylinder or the like, or can be a soft structure such as an air bag. The shrinkage cavity is provided with gas. When the liquid in the cavity expands due to heating, the shrinkage cavity is compressed to reduce its volume, thereby avoiding the problem of the shell expanding too much. When the volume of the liquid in the cavity decreases due to cooling, the shrinkage cavity is released to increase its volume, thereby avoiding the problem of the shell shrinking too much. The shrinkage cavity is arranged at the end of the cavity away from the acoustic window 1, so that the nanometer magnetic fluid fills the space between the acoustic window 1 and the ultrasonic transducer 5.

[0059] In a specific embodiment, the cross section of the cavity at the position close to the acoustic window 1 is larger than the cross section of the cavity at the position away from the acoustic window 1.

[0060] Please refer to Fig. 1 and Fig. 2 wherein the shell 2 comprises an upper part and a lower part. The upper part is used to connect the acoustic window 1, and the lower part is used to accommodate the mechanical transmission structure 6 of the ultrasonic transducer 5. In order to provide a larger swing space for the ultrasonic transducer 5 and cooperate with the use of a wide-angle acoustic window.

[0061] In addition, in order to avoid wasting the space of the lower part, the space of the upper part can be larger than that of the lower part, so as to fully utilize the space while avoiding unnecessary volume occupation. Specifically, the cross section of the upper part of the cavity for connecting the acoustic window 1 is rectangular, having a first width. One end of the upper part is connected to the acoustic window 1, and the other end is connected to the lower part of the cavity. The lower part of the cavity is used to accommodate the mechanical transmission structure 6. Since the mechanical transmission structure 6 is a structure extending along the length direction, the area required in the width direction is small. Therefore, the cross section of the lower part of the cavity has a second width, which is smaller than the first width.

[0062] In addition, since the cross-sectional areas of the two parts are different, the connection position between the two parts can be a tapered transition, avoiding the formation of a dead angle of the cavity and facilitating the flow of the nanometer magnetic fluid in the cavity to the side of the acoustic window 1.

[0063] In addition to any one of the above embodiments, the shell 2 is a hard shell; and / or the acoustic window 1 is a plastic part.

[0064] It should be noted that the hard shell is mainly used to protect the stability of the internal structure, and the connection between the shell 2 and the acoustic window 1 is preferably a tight connection, which isolates the inside into a liquid-containing cavity, and the inner wall of the shell 2 is provided with a metal shielding layer 3, which can be tightly attached or directly fixed on the shell 2 and connected with the edge of the acoustic window 1 to avoid electromagnetic wave leakage.

[0065] Optionally, the hard shell can be a metal structure or a plastic structure, and the acoustic window 1 can be a jelly-like structure to contact the position to be scanned.

[0066] The ultrasonic transducer 5 in the present application is also connected to a back echo imaging software analysis system, which can be a control analyzer provided with the ultrasonic transducer 5, or can be part of a 4D back echo imaging system to form an analysis result or directly display to the operator.

[0067] The anti-interference probe provided in the present application can be an intracavity probe, that is, it is inserted into the body for scanning, and during operation, the anti-interference probe as a whole does not move, but only swings inside the shell 2 through the ultrasonic transducer 5 to realize scanning; it can also be an extracorporeal probe, and during operation, the acoustic window 1 is attached to the position to be scanned, and the ultrasonic transducer 5 swings inside the shell 2 to realize scanning.

[0068] In addition to the main structure of the 4D imaging probe, the connection relationship between the parts and the working state provided in each of the above embodiments, the present application also provides a 4D back echo imaging system comprising the 4D imaging probe disclosed in the above embodiments.

[0069] The structures of other parts of the 4D back echo imaging system can refer to the prior art, and will not be described here.

[0070] Each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0071] The 4D back echo imaging system and the 4D imaging probe provided by the present application are described in detail above. The principles and implementation modes of the present application are described by applying specific examples in this paper, and the above embodiment description is only used to help understand the method and core idea of the present application. It should be noted that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A 4D imaging probe, characterized in that, The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging.

2. The 4D imaging probe of claim 1, wherein, The application relates to an anti-interference probe for 4D imaging.

3. The 4D imaging probe of claim 1, wherein, The application relates to an anti-interference probe for 4D imaging.

4. The 4D imaging probe of claim 3, wherein, The application relates to an anti-interference probe for 4D imaging.

5. The 4D imaging probe of claim 3, wherein, The application relates to an anti-interference probe for 4D imaging.

6. The 4D imaging probe according to any one of claims 1 to 4, characterized in that, The application relates to an anti-interference probe for 4D imaging.

7. The 4D imaging probe according to any one of claims 1 to 4, characterized in that, The application relates to an anti-interference probe for 4D imaging.

8. The 4D imaging probe of any one of claims 1 to 4, wherein, The application relates to an anti-interference probe for 4D imaging.

9. The 4D imaging probe of claim 8, wherein, The application relates to an anti-interference probe for 4D imaging.

10. A 4D echo imaging system comprising an interference resistant probe, characterized in that, The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. The application relates to an anti-interference probe for 4D imaging. 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