Ultrasonic signal acquisition device for craniocerebral

Abstract

The invention belongs to the technical field of craniocerebral ultrasonic signal acquisition, and discloses a craniocerebral ultrasonic signal acquisition device, which comprises a bed body structure and a detection structure, the detection structure is fixed to one side of the bed body structure and used for collecting brain ultrasonic signals of a patient when the patient lies prostrate or supine on the bed body structure. The detection structure comprises a rotating mechanism, a transmitting probe mechanical arm and a receiving probe mechanical arm which are fixed on the rotating mechanism, a transmitting probe, a receiving probe and a control mechanism; furthermore, the rotating mechanism comprises a rotatable annular base and an annular motion track arranged on the annular base; a first motor and a second motor are arranged on the annular motion track, under the action of the control mechanism, the device can achieve automatic operation of craniocerebral ultrasonic signal collection, and does not depend on craniocerebral ultrasonic signal collection too much, the accuracy of craniocerebral ultrasonic signal collection is improved, and the accuracy of craniocerebral ultrasonic signal collection is improved. And ultrasonic signal acquisition with different functions can be realized aiming at different application occasions.

Description

Technical Field

[0001] The present invention belongs to the technical field of cranial and brain ultrasonic signal acquisition, and more specifically, relates to a cranial and brain ultrasonic signal acquisition device. Background Art

[0002] At present, the application of ultrasonic diagnostic instruments in clinical diagnosis has become very popular, and has made great contributions to doctors' accurate understanding of patients' conditions and the formulation of medical plans. However, its application in brain ultrasound detection is still insufficient. The density of tissues in the brain is different from that in other parts of the body. Since the skull reflects ultrasound signals very strongly, the acquisition of complete brain ultrasound images has been lacking exploration.

[0003] When a patient undergoes a brain ultrasound test, the transmitting probe needs to transmit ultrasound waves, and the receiving probe needs to receive ultrasound waves to achieve the imaging effect. During imaging, 360° ultrasound data of the brain needs to be obtained. Due to the strong reflection of ultrasound signals by the brain, it is impossible to directly use existing ultrasound detection instruments to collect ultrasound data of the brain. Current brain ultrasound tests require the operator to control the position of the probe and set the detection parameters based on manual experience to perform groping ultrasound detection. This is too dependent on the operator, and the judgment and positioning are not accurate. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides an ultrasonic signal acquisition device for the brain, which aims to provide an automated operation of the ultrasonic signal acquisition device for the brain to improve the accuracy of the acquisition of ultrasonic signals for the brain.

[0005] To achieve the above-mentioned object, according to a first aspect of the present invention, there is provided a device for collecting ultrasound signals of the cranium and brain, comprising: a bed structure and a detection structure; the detection structure is fixed to one side of the bed structure, and is used to collect ultrasound signals of the cranium and brain of the patient when the patient lies prone or supine on the bed structure;

[0006] The detection structure includes a rotating mechanism, a transmitting probe mechanical arm, a receiving probe mechanical arm, a transmitting probe, a receiving probe and a control mechanism; wherein, when the patient lies prone or supine on the bed structure, the skull is located at the center of the rotating mechanism; the transmitting probe mechanical arm and the receiving probe mechanical arm are fixed on the rotating mechanism, and the transmitting probe and the receiving probe are correspondingly fixed at the ends of the transmitting probe mechanical arm and the receiving probe mechanical arm, and are respectively used to transmit ultrasonic signals to the skull and the brain, and receive ultrasonic signals after the transmitted ultrasonic signals pass through the skull and the brain;

[0007] The control mechanism is used to control the rotation of the rotating mechanism to achieve 360° ultrasonic signal collection of the brain.

[0008] Furthermore, the rotating mechanism comprises a rotatable annular base and an annular motion track arranged on the annular base, and the brain of the patient is located at the center of the annular base when the patient lies prone or supine on the bed structure;

[0009] A first motor and a second motor are also provided on the circular motion track; the transmitting probe mechanical arm is connected to the output shaft of the first motor through a mechanical shaft, and the receiving probe is connected to the output shaft of the second motor through a mechanical shaft; when the first motor and the second motor move along the circular motion track, the transmitting probe and the receiving probe are driven to move accordingly;

[0010] The control mechanism is used to control the annular base to rotate so that the relative positions of the first motor and the second motor on the annular motion track remain unchanged, thereby realizing 360° ultrasound signal collection of the brain;

[0011] The control mechanism is also used to control the annular base to stop rotating, so that the relative positions of the first motor and the second motor on the annular motion track change, driving the corresponding transmitting probe and receiving probe to transmit ultrasonic signals at different positions of the brain or receive ultrasonic signals at different positions.

[0012] Furthermore, the relative positions of the first motor and the second motor on the annular motion track are changed, including:

[0013] The first motor is fixed and the second motor is moved on the circular motion track, so as to transmit the ultrasonic signal at the same position of the brain and receive the ultrasonic signal at different positions of the brain;

[0014] Alternatively, the second motor is fixed and the first motor is moved on the circular motion track, so as to transmit ultrasonic signals at different positions of the brain and receive ultrasonic signals at the same position of the brain.

[0015] Furthermore, the transmitting probe adopts a single array element structure, and the receiving probe adopts a planar array structure composed of multiple array elements; each array element of the receiving probe is used to receive the transmitted ultrasound signal at different angles behind the brain.

[0016] Furthermore, the transmitting probe and the receiving probe are respectively located on opposite sides of the skull and brain, so that the receiving probe receives the transmission signal passing through the skull and brain, and the transmission signal is used for full waveform inversion.

[0017] Furthermore, it also includes a moving mechanism arranged on the bed structure, which is used to move the bed structure to ensure the integrity of the brain ultrasound signal collection of different patients.

[0018] Furthermore, a solid coupling agent is provided between the ultrasonic transducer and the brain; wherein the ultrasonic transducer is the transmitting probe and the receiving probe.

[0019] Furthermore, it also includes an excitation source for providing ultrasonic signal excitation to the transmitting probe.

[0020] Furthermore, the annular base rotates a fixed angle each time.

[0021] According to a second aspect of the present invention, there is provided a method for cranial ultrasound imaging, comprising:

[0022] The ultrasonic signal acquisition device described in any one of the first aspects is used to acquire 360° ultrasonic signals of the brain; and ultrasonic imaging of the brain is performed based on the ultrasonic signals.

[0023] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

[0024] (1) The present invention provides an automatically operated cranial ultrasound signal acquisition device. Based on the acquisition device designed by the present invention, when the control mechanism controls the rotation mechanism to rotate, the phase position of the transmitting and receiving probes is changed to realize 360° ultrasound signal acquisition of the cranial brain; compared with the electronic switching mentioned in other existing ultrasound imaging methods (a circle of probes are set along the target position, and one of them is used as a transmitting probe in turn, and one or more of the others are used as receiving probes), the present invention realizes the acquisition of all-round sound field information of the human brain through precise motion scanning, only one transmitting probe and one receiving probe are needed, and the signal interference caused by signal switching is avoided, and the signal acquisition accuracy is higher.

[0025] (2) Furthermore, based on the rotating mechanism designed in the present invention, that is, the rotating mechanism includes a rotatable annular base and an annular motion track arranged on the annular base, when the control mechanism controls the annular base to rotate, the relative positions of the first motor and the second motor on the annular motion track remain unchanged, thereby realizing 360° ultrasonic signal acquisition of the brain, and the acquired signals can be used for brain imaging of patients; compared with the method of directly controlling the phase position of the transmitting and receiving probes to perform 360° ultrasonic signal acquisition on the brain through motors, the relative positions of the first motor and the second motor on the annular motion track remain unchanged, and directly controlling the rotation of the annular base can ensure that the phase positions of the transmitting and receiving probes are strictly fixed and unchanged, with higher accuracy.

[0026] At the same time, the present invention also takes into account that the skull reflects ultrasonic signals seriously and it is difficult to penetrate the skull, so that the ultrasonic signal received by the receiving probe that can reflect the internal information of the brain is relatively weak. In order to facilitate the study of ultrasonic signals at different positions of the brain, based on the designed rotating mechanism, when the control mechanism controls the annular base not to rotate, the first motor and the second motor move along the annular motion track, correspondingly driving the transmitting probe and the receiving probe to move, and the brain ultrasonic signals at different transmitting or receiving positions can be studied, so as to determine the optimal transmitting and receiving positions so that the receiving probe receives the strongest ultrasonic signal. In this way, the brain ultrasonic signal acquisition device of the present invention can realize the automated operation of brain ultrasonic signal acquisition, and can also realize ultrasonic signal acquisition of different functions for different application occasions.

[0027] (3) Preferably, the transmitting and receiving probes of the present invention adopt a one-send-multiple-receive method, and multiple receiving array elements can jointly receive the ultrasonic signals emitted by the transmitting array element through ultrasonic waves at different angles behind the skull, which can accurately locate and facilitate comprehensive detection and judgment. When applied to cranial brain imaging, it can improve the imaging effect.

[0028] (4) Preferably, the transmitting probe and the receiving probe are respectively arranged on opposite sides of the skull and brain so that the receiving probe can receive the transmission signal passing through the skull and brain. The transmission signal can be used for full waveform inversion to perform intracranial sound velocity correction.

[0029] (5) Preferably, the bed structure 1 can be moved to ensure the integrity of the cranial ultrasound signal acquisition of different patients, thereby ensuring the integrity of cranial imaging of different patients.

[0030] (6) Preferably, a solid coupling agent is provided between the ultrasonic transducer and the brain to reduce the impact of air ultrasonic attenuation on imaging accuracy.

[0031] (7) Preferably, the annular base rotates a fixed angle each time to achieve average acquisition of the ultrasound signal. This average acquisition method can effectively improve the signal-to-noise ratio of the transcranial ultrasound signal.

[0032] In summary, the cranial and brain ultrasonic signal acquisition device of the present invention realizes the automated operation of cranial and brain ultrasonic signal acquisition, does not rely too much on the cranial and brain ultrasonic signal acquisition, improves the accuracy of cranial and brain ultrasonic signal acquisition, and can realize ultrasonic signal acquisition of different functions for different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the structure of an ultrasonic signal acquisition device for the brain in an embodiment of the present invention.

[0034] Figure 2Schematic diagram of the detection structure in the ultrasonic signal acquisition device in an embodiment of the present invention.

[0035] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0036] 1-bed structure, 2-detection structure, 3-annular base, 4-transmitting probe mechanical arm, 5-mechanical axis, 6-first motor, 7-receiving probe mechanical arm, 8-annular motion track, 9-second motor, 10-transmitting probe, 11-receiving probe. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] In the present invention, the terms "first", "second", etc. in the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0039] Example 1

[0040] like Figure 1 As shown, an embodiment of the present invention provides an ultrasonic signal acquisition device for the brain, comprising: a bed structure 1 for fixing a patient in a prone or supine position and a detection structure 2 for collecting ultrasonic signals of the brain; the detection structure 2 is fixed to one side of the bed structure 1, and is used to collect ultrasonic signals of the brain of the patient when the patient is in a prone or supine position on the bed structure 1; in the embodiment of the present invention, the prone position is preferred to improve comfort.

[0041] The detection structure 2 includes a rotating mechanism, a first motor 6 and a second motor 9, a mechanical axis 5, a transmitting probe mechanical arm 4, a receiving probe mechanical arm 7, a transmitting probe 10, a receiving probe 11 and a control mechanism; wherein the rotating mechanism includes a rotatable annular base 3 and an annular motion track 8 arranged on the annular base 3, when the patient lies prone on the bed structure 1, the skull is located at the center of the annular base 3, a first motor 6 and a second motor 9 that can move along the annular motion track 8 are arranged on the annular motion track 8, and mechanical axes 5 are respectively arranged on the output shafts of the first motor 6 and the second motor 9, one end of the transmitting detection mechanical arm 4 is connected to the corresponding mechanical axis 5, and the other end is connected to the transmitting probe 10, one end of the receiving probe mechanical arm 7 is connected to the corresponding mechanical axis 5, and the other end is connected to the receiving probe 11; when the first motor 6 and the second motor 9 move along the annular motion track 8, the transmitting probe 10 and the receiving probe 11 are driven to move accordingly; the transmitting probe 10 is used to transmit ultrasonic signals to the skull, and the receiving probe 11 is used to receive the ultrasonic signals transmitted by the transmitting probe at different angles behind the skull.

[0042] The control mechanism is used to control the rotation of the annular base 3 so that the relative positions of the first motor 6 and the second motor 9 on the annular motion track 8 remain unchanged, thereby realizing 360° ultrasound signal collection of the brain;

[0043] The control mechanism is also used to control the relative positions of the first motor 6 and the second motor 9 on the circular motion track 8 to change when the annular base 3 does not rotate, thereby driving the corresponding transmitting probe 10 and the receiving probe 11 to transmit ultrasonic signals at different positions of the brain and receive corresponding ultrasonic signals at the same position, or to transmit ultrasonic signals at the same position of the brain and receive corresponding ultrasonic signals at different positions.

[0044] In the embodiment of the present invention, the central axis direction of the annular base 3, that is, the direction horizontal to the bed structure 1 and passing through the center of the annular base 3 is the z-axis, and the direction perpendicular to the bed structure 1 upward is the x-axis, to construct a three-dimensional xyz coordinate system. The annular base 3 can rotate around the z-axis, driving the transmitting probe 10 and the receiving probe 11 to rotate around the z-axis; the mechanical shaft connected to the output shafts of the first motor 6 and the second motor 9 can drive the corresponding transmitting probe mechanical arm 4 and the receiving probe mechanical arm 7 to rotate around the y-axis, and then drive the transmitting probe 10 and the receiving probe 11 to rotate around the y-axis; that is, the transmitting probe 10 and the receiving probe 11 can only rotate around the z-axis when the annular base 3 rotates and the relative positions of the first motor 6 and the second motor 9 on the circular motion track 8 remain unchanged, so as to realize the 360° layered three-dimensional cranial ultrasound signal acquisition of the cranial brain; it can also drive the transmitting probe 10 and the receiving probe 11 to rotate around the y-axis and the z-axis at the same time when the annular base 3 does not rotate and the first motor 6 and the second motor 9 move relatively on the circular motion track 8, so as to realize the acquisition of transmitting and receiving signals at different positions.

[0045] The bed structure 1 can move along the z-axis to ensure the integrity of the brain ultrasound signal acquisition of different patients, thereby ensuring the integrity of brain imaging of different patients.

[0046] In the process of collecting 360° ultrasonic signals of the skull, the annular base 3 is controlled to rotate a fixed angle each time. This average collection method can effectively improve the signal-to-noise ratio of the transcranial ultrasonic signal. The diameter of the annular base 3 is larger than the average skull diameter.

[0047] As a preferred implementation method, a single array element is used as a transmitting probe 10, and a surface array composed of multiple array elements is used as a receiving probe 11. Each array element on the surface array can be used as a receiving unit. After an array element transmits a signal, multiple receiving array elements can jointly receive the ultrasonic signal transmitted by the transmitting array element through different angles behind the skull, which can accurately locate and facilitate comprehensive detection and judgment, and improve the imaging effect. The position of the transmitting array element is changed and the signal is transmitted and received again. Repeating the operation can complete the layered three-dimensional skull and brain image acquisition.

[0048] As a preferred implementation, it also includes an excitation source for providing ultrasonic signal excitation to the transmitting probe 10. In the embodiment of the present invention, a high-voltage ultrasonic excitation of -200V to 200V is adopted.

[0049] As a preferred implementation, the transmitting probe 10 and the receiving probe 11 are respectively located on opposite sides of the skull, so that the receiving probe 11 receives the transmission signal passing through the skull, and the transmission signal can be used for full waveform inversion to perform intracranial sound velocity correction.

[0050] The concept of full waveform inversion originated from geophysics. When there are loose, honeycomb holes and other defects inside the concrete, wave scattering and diffraction will occur. According to the initial arrival time of the wave, the energy attenuation characteristics of the wave, the frequency change and the degree of waveform distortion, the acoustic parameters of the concrete within the measured range can be obtained. The application of this method in human tissue ultrasound is under discussion. However, when structures such as bones, blood vessels, and tumors appear in human tissue, the acoustic parameters of the human tissue within the measured range can be obtained according to the initial arrival time of the wave, the energy attenuation characteristics of the wave, the frequency change and the degree of waveform distortion, and it is currently believed to have great potential in imaging correction. The device of the present invention can obtain the transmission signal that penetrates the brain to facilitate full waveform inversion.

[0051] As a preferred implementation method, a solid coupling agent is used in the embodiment of the present invention to achieve coupling between the ultrasonic transducer (transmitting probe and receiving probe) and the scanned object (brain), thereby reducing the impact of air ultrasonic attenuation on imaging accuracy.

[0052] In the embodiment of the present invention, when the ultrasonic signal acquisition device is working, the patient lies prone on the bed structure 1, and the bed structure 1 is moved so that the brain is located at the center of the annular base 3. The control mechanism controls the annular base 3 to rotate, and keeps the relative positions of the first motor 6 and the second motor 9 on the annular motion track 8 unchanged, thereby realizing 360° ultrasonic signal acquisition of the brain; or, the control mechanism controls the annular base 3 not to rotate, so that the relative positions of the first motor 6 and the second motor 9 on the annular motion track 8 are changed, driving the corresponding transmitting probe 10 and the receiving probe 11 to transmit ultrasonic signals at different positions of the brain and receive corresponding ultrasonic signals at the same position, or to transmit ultrasonic signals at the same position of the brain and receive corresponding ultrasonic signals at different positions.

[0053] The present invention provides an automatically operated cranial ultrasonic signal acquisition device. Based on the acquisition device designed by the present invention, when the control mechanism controls the annular base 3 to rotate, the relative positions of the first motor 6 and the second motor 9 on the annular motion track 8 remain unchanged, thereby realizing 360° ultrasonic signal acquisition of the cranial brain. The acquired signals can be used for cranial brain imaging of patients. Compared with the method of directly controlling the phase positions of transmitting and receiving probes by motors to acquire 360° ultrasonic signals of the cranial brain, the relative positions of the first motor 6 and the second motor 9 on the annular motion track 8 remain unchanged, and the rotation of the annular base 3 is directly controlled, so that the phase positions of the transmitting and receiving probes can be strictly fixed and unchanged, and the accuracy is higher. Compared with the electronic switching mentioned in other existing ultrasonic imaging methods (a circle of probes are set along the target position, and one of them is used as a transmitting probe in turn, and one or more of the remaining ones are used as receiving probes), the present invention realizes the acquisition of all-round sound field information of the human brain through precision motion scanning, and only one transmitting probe and one receiving probe are needed, and the signal interference caused by signal switching is avoided, and the accuracy of signal acquisition is higher.

[0054] The present invention also takes into account that the skull reflects ultrasonic signals seriously and it is difficult to penetrate the skull, so that the ultrasonic signals received by the receiving probe that can reflect the internal information of the brain are relatively weak. In order to facilitate the study of ultrasonic signals at different positions of the brain, a circular motion track 8 is set on the circular base 3, and a first motor 6 and a second motor 9 that can move along the circular motion track 8 are set on the circular motion track 8. When the control mechanism controls the circular base 3 not to rotate, the first motor 6 and the second motor 9 move along the circular motion track 8, and correspondingly drive the transmitting probe 10 and the receiving probe 11 to move. At this time, the position of the first motor 6 is fixed, and the second motor 9 is moved along the circular motion track 8 to change the relative positions of the transmitting and receiving probes, so as to realize the collection of ultrasonic signals received at different positions of the brain under the fixed transmitting position, or the position of the second motor 9 is fixed, and the first motor 6 is moved along the circular motion track 8 to change the relative positions of the transmitting and receiving probes, so as to realize the collection of ultrasonic signals at the same receiving position under different transmitting positions, so as to study ultrasonic signals at different positions, and also facilitate the determination of the optimal transmitting and receiving positions so that the receiving probe receives the strongest ultrasonic signal.

[0055] To sum up, the cranial and brain ultrasonic signal acquisition device of the present invention realizes the automated operation of cranial and brain ultrasonic signal acquisition, does not rely too much on the cranial and brain ultrasonic signal acquisition, improves the accuracy of cranial and brain ultrasonic signal acquisition, and can realize ultrasonic signal acquisition of different functions for different application scenarios.

[0056] Example 2

[0057] The embodiment of the present invention provides a method for cranial ultrasound imaging, comprising: performing cranial ultrasound imaging using 360° layered three-dimensional cranial ultrasound signals acquired by the ultrasound signal acquisition device in Example 1.

[0058] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasonic signal acquisition device for cranial brain, characterized in that: include: A bed structure (1) and a detection structure (2); the detection structure (2) is fixed to one side of the bed structure (1) and is used to collect the patient's cranial ultrasound signal when the patient lies prone or supine on the bed structure (1); The detection structure (2) comprises a rotating mechanism, a transmitting probe mechanical arm (4), a receiving probe mechanical arm (7), a transmitting probe (10), a receiving probe (11) and a control mechanism; wherein, when the patient lies prone or supine on the bed structure (1), the skull is located at the center of the rotating mechanism; the transmitting probe mechanical arm (4) and the receiving probe mechanical arm (7) are fixed on the rotating mechanism, and the transmitting probe (10) and the receiving probe (11) are correspondingly fixed at the ends of the transmitting probe mechanical arm (4) and the receiving probe mechanical arm (7), and are respectively used to transmit ultrasonic signals to the skull and brain, and to receive ultrasonic signals after the transmitted ultrasonic signals pass through the skull and brain; The control mechanism is used to control the rotation of the rotating mechanism to achieve 360° ultrasonic signal collection of the brain.

2. The ultrasonic signal acquisition device according to claim 1, characterized in that: The rotating mechanism comprises a rotatable annular base (3) and an annular motion track (8) arranged on the annular base (3); when the patient lies prone or supine on the bed structure (1), the brain is located at the center of the annular base (3); A first motor (6) and a second motor (9) are also arranged on the circular motion track (8); the transmitting probe mechanical arm (4) is connected to the output shaft of the first motor (6) via a mechanical shaft (5), and the receiving probe (11) is connected to the output shaft of the second motor (9) via a mechanical shaft (5); when the first motor (6) and the second motor (9) move along the circular motion track (8), they drive the transmitting probe (10) and the receiving probe (11) to move accordingly; The control mechanism is used to control the rotation of the annular base (3) so that the relative positions of the first motor (6) and the second motor (9) on the annular motion track (8) remain unchanged, thereby realizing 360° ultrasound signal collection of the brain; The control mechanism is also used to control the relative positions of the first motor (6) and the second motor (9) on the circular motion track (8) to change when the annular base (3) does not rotate, thereby driving the corresponding transmitting probe (10) and receiving probe (11) to transmit ultrasonic signals at different positions of the brain or receive ultrasonic signals at different positions.

3. The ultrasonic signal acquisition device according to claim 2, characterized in that: The relative positions of the first motor (6) and the second motor (9) on the annular motion track (8) are changed, comprising: The first motor (6) is fixed and the second motor (9) is moved on the annular motion track (8), so as to transmit ultrasonic signals at the same position of the brain and receive ultrasonic signals at different positions of the brain; Alternatively, the second motor (9) is fixed and the first motor (6) is moved on the annular motion track (8), so as to transmit ultrasonic signals at different positions of the brain and receive ultrasonic signals at the same position of the brain.

4. The ultrasonic signal acquisition device according to any one of claims 1 to 3, characterized in that: The transmitting probe (10) adopts a single array element structure, and the receiving probe (11) adopts a planar array structure composed of multiple array elements; each array element of the receiving probe (11) is used to receive the transmitted ultrasonic signal at different angles behind the skull.

5. The ultrasonic signal acquisition device according to claim 4, characterized in that: The transmitting probe (10) and the receiving probe (11) are respectively located on opposite sides of the brain, so that the receiving probe (11) receives a transmission signal passing through the brain, and the transmission signal is used for full waveform inversion.

6. The ultrasonic signal acquisition device according to claim 4, characterized in that: It also comprises a moving mechanism arranged on the bed structure (1), which is used to move the bed structure (1) to ensure the integrity of the acquisition of cranial ultrasound signals of different patients.

7. The ultrasonic signal acquisition device according to claim 1, characterized in that: A solid coupling agent is provided between the ultrasonic transducer and the brain; wherein the ultrasonic transducer is the transmitting probe (10) and the receiving probe (11).

8. The ultrasonic signal acquisition device according to claim 1, characterized in that: It also includes an excitation source for providing ultrasonic signal excitation to the transmitting probe (10).

9. The ultrasonic signal acquisition device according to claim 2, characterized in that: The annular base (3) rotates at a fixed angle each time.

10. A method for cranial ultrasound imaging, characterized in that: include: The ultrasonic signal acquisition device according to any one of claims 1 to 9 is used to acquire 360° ultrasonic signals of the brain; Perform brain ultrasound imaging based on the ultrasound signal.

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