An ultrasonic signal acquisition device for the brain

Abstract

The application belongs to the technical field of brain ultrasonic signal acquisition, and discloses an ultrasonic signal acquisition device for brain, which comprises a bed body structure and a detection structure; the detection structure is fixed on one side of the bed body structure and is used for acquiring brain ultrasonic signals of a patient when the patient is prone 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 fixed on the rotating mechanism, a transmitting probe, a receiving probe and a control mechanism; further, the rotating mechanism comprises a rotatable annular base and an annular movement track arranged on the annular base; a first motor and a second motor are arranged on the annular movement track; under the action of the control mechanism, the device can realize automatic operation of brain ultrasonic signal acquisition, is less dependent on brain ultrasonic signal acquisition, improves the accuracy of brain ultrasonic signal acquisition, and can realize ultrasonic signal acquisition with different functions for different application occasions.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of brain ultrasonic signal acquisition, and more particularly relates to an ultrasonic signal acquisition device for brain. BACKGROUND

[0002] At present, the application of ultrasonic diagnostic instrument in clinical diagnosis has been very popular, which has made great contribution to the accurate understanding of patient's condition by doctors and the formulation of medical treatment scheme. However, its application in brain ultrasonic detection is still insufficient. The density of brain is different from that of other parts of the body, and due to the strong reflection of skull to ultrasonic signal, the acquisition of complete brain ultrasonic image has been lack of exploration.

[0003] When the patient undergoes brain ultrasonic detection, the ultrasonic wave is emitted by the transmitting probe, and the ultrasonic wave is received by the receiving probe to achieve imaging effect. The 360° ultrasonic data of brain need to be acquired during imaging. Due to the strong reflection of brain to ultrasonic signal, the existing ultrasonic detection instrument cannot be directly used for the acquisition of brain ultrasonic data. At present, the brain ultrasonic detection needs to be controlled by the operator to set the detection parameters based on artificial experience for exploratory ultrasonic detection, which is too dependent on the operator and the judgment and positioning are not accurate. SUMMARY

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

[0005] To achieve the above-mentioned purpose, according to the first aspect of the present application, an ultrasonic signal acquisition device for brain is provided, which comprises a bed body structure and a detection structure; the detection structure is fixed on one side of the bed body structure, and is used for acquiring the ultrasonic signal of patient's brain when the patient is prone or supine on the bed body structure.

[0006] The detection structure comprises a rotating mechanism, a transmitting probe mechanical arm, a receiving probe mechanical arm, a transmitting probe, a receiving probe and a control mechanism; wherein the brain of the patient is located at the center of the rotating mechanism when the patient is prone or supine on the bed body structure; 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 for transmitting ultrasonic signal to the brain and receiving the ultrasonic signal after the transmission of the brain;

[0007] The control mechanism is used for controlling the rotation of the rotating mechanism to realize the acquisition of 360° ultrasonic signal of the brain.

[0008] Further, the rotating mechanism comprises a rotatable annular base and an annular movement track arranged on the annular base, and the patient lies on the bed structure in a prone or supine position with the head located at the center of the annular base.

[0009] A first motor and a second motor are arranged on the annular movement 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 annular movement track, the transmitting probe and the receiving probe are driven to move correspondingly.

[0010] The control mechanism is used to control the relative positions of the first motor and the second motor on the annular movement track unchanged when the annular base rotates, so as to realize 360° ultrasonic signal collection of the head.

[0011] The control mechanism is also used to control the relative positions of the first motor and the second motor on the annular movement track changed when the annular base does not rotate, so as to drive the corresponding transmitting probe and receiving probe to emit ultrasonic signals at different positions of the head or receive ultrasonic signals at different positions.

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

[0013] The first motor is fixed, and the second motor moves on the annular movement track to emit ultrasonic signals at the same position of the head and receive ultrasonic signals at different positions of the head;

[0014] Or the second motor is fixed, and the first motor moves on the annular movement track to emit ultrasonic signals at different positions of the head and receive ultrasonic signals at the same position of the head.

[0015] Further, the transmitting probe adopts a single array element structure, and the receiving probe adopts a surface array structure composed of multiple array elements; each array element of the receiving probe is used to receive received signals at different angles after the transmitted ultrasonic signals pass through the head.

[0016] Further, the transmitting probe and the receiving probe are respectively located on opposite sides of the head, so that the receiving probe receives transmission signals passing through the head, and the transmission signals are used for full waveform inversion.

[0017] Further, a moving mechanism arranged on the bed structure is further included, which is used to move the bed structure to ensure the integrity of the head ultrasonic signal collection of different patients.

[0018] Further, a solid coupling agent is arranged between the ultrasonic transducer and the brain.

[0019] Further, an excitation source is further arranged for providing the transmitting probe with ultrasonic signal excitation.

[0020] Further, the annular base is fixed to rotate by a fixed angle each time.

[0021] According to a second aspect of the present application, a brain ultrasonic imaging method is provided, comprising:

[0022] The brain 360° ultrasonic signal is collected by the ultrasonic signal collection device according to any one of the first aspect, and brain ultrasonic imaging is performed based on the ultrasonic signal.

[0023] Overall, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0024] (1) The present application provides an automatic brain ultrasonic signal collection device, based on the collection device designed by the present application, the control mechanism controls the rotation of the rotating mechanism, changes the phase position of the transmitting and receiving probes, and realizes the collection of brain 360° ultrasonic signal; Compared with the electronic switching mentioned in other existing ultrasonic imaging methods (a circle of probes is arranged along the target position, one of them is used as the transmitting probe, and one or more of the remaining probes are used as the receiving probe), the present application realizes the collection of brain full-range sound field information by precise motion scanning, only one transmitting probe and one receiving probe are needed, and signal interference caused by signal switching is avoided, and the signal collection accuracy is higher.

[0025] (2) Further, the rotating mechanism designed by the present application, i.e. the rotating mechanism includes a rotatable annular base and an annular motion track arranged on the annular base, the control mechanism controls the rotation of the annular base, the relative position of the first motor and the second motor on the annular motion track is unchanged, the brain 360° ultrasonic signal collection is realized, and the collected signal can be used for brain imaging of the patient; Compared with the method of directly controlling the phase position of the transmitting and receiving probes by the motor to collect 360° ultrasonic signal of the brain, the relative position of the first motor and the second motor on the annular motion track is unchanged, and the rotation of the annular base is directly controlled, which can ensure that the phase position of the transmitting and receiving probes is strictly fixed and unchanged, and the accuracy is higher.

[0026] Meanwhile, the application also takes into account that the skull reflects the ultrasonic signal seriously, and it is difficult to penetrate the skull, so that the ultrasonic signal received by the receiving probe is relatively weak, which can reflect the internal information of the skull and brain. In order to study the ultrasonic signal at different positions of the skull and 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, which drives the transmitting probe and the receiving probe to move, so that the skull and brain ultrasonic signal at different transmitting or receiving positions can be studied, so as to determine the optimal transmitting and receiving position to make the receiving probe receive the strongest ultrasonic signal. In this way, the skull and brain ultrasonic signal acquisition device of the application can realize the automation operation of the skull and brain ultrasonic signal acquisition, and also realize the ultrasonic signal acquisition with different functions for different application occasions.

[0027] (3) As preferred, the transmitting and receiving probes of the application adopt the one-transmitting and multi-receiving mode, and the multiple receiving elements can jointly receive the ultrasonic signal transmitted by the transmitting element after passing through the skull and brain at different angles, which can be accurately positioned and is beneficial to comprehensive detection and judgment. When applied to skull and brain imaging, the imaging effect can be improved.

[0028] (4) As preferred, the transmitting probe and the receiving probe are arranged on the opposite sides of the skull and brain respectively, so that the receiving probe can receive the transmission signal passing through the skull and brain, which can be used for full waveform inversion to correct the intracranial sound speed.

[0029] (5) As preferred, the bed body structure 1 can be moved to ensure the integrity of the skull and brain ultrasonic signal acquisition of different patients, and further ensure the integrity of the skull and brain imaging of different patients.

[0030] (6) As preferred, a solid coupling agent is arranged between the ultrasonic transducer and the skull and brain, which can reduce the influence of serious air ultrasonic attenuation on imaging accuracy.

[0031] (7) As preferred, the annular base rotates by a fixed angle each time, which can realize the average acquisition of the ultrasonic signal. This average acquisition method can effectively improve the signal-to-noise ratio of the transcranial ultrasonic signal.

[0032] In summary, the skull and brain ultrasonic signal acquisition device of the application realizes the automation operation of the skull and brain ultrasonic signal acquisition, and improves the accuracy of the skull and brain ultrasonic signal acquisition, and can realize the ultrasonic signal acquisition with different functions for different application occasions. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The figure is a structure schematic diagram of the ultrasonic signal acquisition device for the skull and brain in the embodiment of the application.

[0034] Figure 2Fig. 1 is a schematic diagram of a detection structure in an ultrasonic signal acquisition device according to an embodiment of the present application.

[0035] In all the drawings, the same reference signs are used to denote the same elements or structures, wherein:

[0036] 1-bed structure, 2-detection structure, 3-annular base, 4-emission probe mechanical arm, 5-mechanical shaft, 6-first motor, 7-reception probe mechanical arm, 8-annular movement track, 9-second motor, 10-emission probe, 11-reception probe. DETAILED DESCRIPTION

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

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

[0039] Embodiment 1

[0040] As shown in Figure 1 The present application provides an ultrasonic signal acquisition device for the brain, which comprises a bed structure 1 for fixing the patient in a prone or supine position and a detection structure 2 for brain ultrasonic acquisition; the detection structure 2 is fixed on one side of the bed structure 1, and is used to acquire the brain ultrasonic signal of the patient when the patient is in a prone or supine position on the bed structure 1; in the present application, the prone position is preferred to improve comfort.

[0041] The detection structure 2 comprises a rotating mechanism, a first motor 6 and a second motor 9, a mechanical shaft 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 comprises a rotatable annular base 3 and an annular motion track 8 arranged on the annular base 3, when a patient lies on the bed body structure 1, the head is located at the center of the annular base 3, the first motor 6 and the second motor 9 are arranged on the annular motion track 8 and can move along the annular motion track 8, the mechanical shaft 5 is arranged on the output shaft of the first motor 6 and the second motor 9 respectively, one end of the transmitting probe mechanical arm 4 is connected to the corresponding mechanical shaft 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 shaft 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 corresponding transmitting probe 10 and receiving probe 11 are driven to move; the transmitting probe 10 is used for transmitting ultrasonic signals to the head, and the receiving probe 11 is used for receiving the ultrasonic signals transmitted by the transmitting probe and received at different angles after passing through the head.

[0042] The control mechanism is used for controlling the annular base 3 to rotate, so that the relative positions of the first motor 6 and the second motor 9 on the annular motion track 8 remain unchanged, and the ultrasonic signals of the head are collected in 360 degrees.

[0043] The control mechanism is also used for controlling 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 change, the corresponding transmitting probe 10 and receiving probe 11 are driven to transmit ultrasonic signals at different positions of the head and receive corresponding ultrasonic signals at the same position, or transmit ultrasonic signals at the same position of the head and receive corresponding ultrasonic signals at different positions.

[0044] In the embodiment of the application, the direction of the central axis of the annular base 3, that is, the direction horizontal to the bed body structure 1 and passing through the center of the annular base 3, is the z-axis, and the direction vertical to the bed body structure 1 upward is the x-axis, and a three-dimensional xyz coordinate system is constructed. The annular base 3 can rotate around the z-axis, and the transmitting probe 10 and the receiving probe 11 are driven to rotate around the z-axis; the mechanical shaft connected to the output shaft of the first motor 6 and the second motor 9 can drive the corresponding transmitting probe mechanical arm 4 and 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, the relative positions of the first motor 6 and the second motor 9 on the annular motion track 8 remain unchanged, and the ultrasonic signals of the head are collected in 360 degrees; or the transmitting probe 10 and the receiving probe 11 can be driven 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 annular motion track 8, and the signals transmitted and received at different positions are collected.

[0045] The bed body structure 1 can move along the z-axis, ensuring the integrity of the ultrasonic signal collection of the cranium of different patients, and further ensuring the integrity of the cranium imaging of different patients.

[0046] During the ultrasonic signal collection of the cranium 360°, the annular base 3 is controlled to rotate by a fixed angle each time, and the average collection method can effectively improve the signal-to-noise ratio of the transcranial ultrasonic signal. The diameter of the annular base 3 is greater than the average skull diameter.

[0047] As a preferred implementation, a single array element is used as the transmitting probe 10, and a surface array composed of multiple array elements is used as the receiving probe 11. Each array element on the surface array can be used as a receiving unit. After a single array element transmits a signal, multiple receiving array elements can jointly receive ultrasonic signals of different angles after the ultrasonic signal transmitted by the transmitting array element passes through the cranium. The ultrasonic signals can be accurately positioned and are conducive to comprehensive detection and judgment, thereby improving the imaging effect. By changing the position of the transmitting array element and then transmitting and receiving signals, the layered three-dimensional cranium image collection can be completed through repeated operations.

[0048] As a preferred implementation, an excitation source is further included to provide ultrasonic signal excitation to the transmitting probe 10. In the embodiment of the present application, a high-voltage ultrasonic excitation of -200V-200V is used.

[0049] As a preferred implementation, the transmitting probe 10 and the receiving probe 11 are respectively located on opposite sides of the cranium, so that the receiving probe 11 receives a transmission signal that passes through the cranium. The transmission signal can be used for full waveform inversion to correct the intracranial sound speed.

[0050] The concept of full waveform inversion originates from geophysics. When there are defects such as loose and honeycomb holes in concrete, wave scattering and diffraction will occur. According to the initial arrival time of the wave, the energy attenuation characteristics, frequency changes, and wave distortion degree of the wave, the acoustic parameters of the concrete within the measured range can be obtained. The application of this method in human tissue ultrasonography is being explored. However, when structures such as bones, blood vessels, and tumors appear in human tissue, according to the initial arrival time of the wave, the energy attenuation characteristics, frequency changes, and wave distortion degree of the wave, the acoustic parameters of the human tissue within the measured range can be obtained. It is currently believed that there is great potential in imaging correction. The device of the present application can obtain a transmission signal that penetrates the cranium, so as to facilitate full waveform inversion.

[0051] As a preferred implementation, a solid coupling agent is used in the embodiment of the present application to realize the coupling between the ultrasonic transducer (transmitting probe and receiving probe) and the scanning object (cranium), thereby reducing the influence of serious air ultrasonic attenuation on the imaging accuracy.

[0052] In the embodiment of the present application, when the ultrasonic signal acquisition device works, the user lies on the bed structure 1, moves the bed structure 1 to make the brain be located at the center of the annular base 3, controls the annular base 3 to rotate, and controls the relative positions of the first motor 6 and the second motor 9 on the annular motion track 8 to be unchanged, so as to realize 360° ultrasonic signal acquisition of the brain; or, the control mechanism controls the annular base 3 not to rotate, changes the relative positions of the first motor 6 and the second motor 9 on the annular motion track 8, drives the corresponding transmitting probe 10 and receiving probe 11 to emit ultrasonic signals at different positions of the brain and receive corresponding ultrasonic signals at the same position, or to emit ultrasonic signals at the same position of the brain and receive corresponding ultrasonic signals at different positions.

[0053] The present application provides an automatically operated brain ultrasonic signal acquisition device. 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 are unchanged, so as to realize 360° ultrasonic signal acquisition of the brain. The acquired signals can be used for brain imaging of a patient. Compared with the method of directly controlling the phase positions of the transmitting and receiving probes by the motor to realize 360° ultrasonic signal acquisition of the brain, the relative positions of the first motor 6 and the second motor 9 on the annular motion track 8 are unchanged, and the annular base 3 is directly controlled to rotate, so as to ensure that the phase positions of the transmitting and receiving probes are strictly fixed and unchanged, and the precision is higher. Compared with the electronic switching (a circle of probes are arranged along the target position, one of them is used as a transmitting probe, and one or more of the remaining probes are used as receiving probes) mentioned in other existing ultrasonic imaging methods, the present application realizes acquisition of full-range sound field information of the human brain by the precise motion scanning method, only one transmitting probe and one receiving probe are needed, and signal interference caused by signal switching is avoided, and the precision of signal acquisition is higher.

[0054] The application also considers that the skull reflects the ultrasonic signal seriously, and it is difficult to penetrate the skull, so that the ultrasonic signal received by the receiving probe to reflect the internal information of the brain is weak. In order to facilitate the study of the ultrasonic signal at different positions of the brain, the annular movement track 8 is arranged on the annular base 3, the first motor 6 and the second motor 9 which can move along the annular movement track 8 are arranged on the annular movement track 8, when the control mechanism controls the annular base 3 not to rotate, the first motor 6 and the second motor 9 move along the annular movement track 8, which drives 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 moves along the annular movement track 8, so as to change the relative position of the transmitting probe and the receiving probe, realize the collection of the ultrasonic signal received at different positions of the brain under the condition that the transmitting position is fixed, or the position of the second motor 9 is fixed, and the first motor 6 moves along the annular movement track 8, so as to change the relative position of the transmitting probe and the receiving probe, realize the collection of the ultrasonic signal at the same receiving position under the condition that the different transmitting positions are fixed, so as to study the ultrasonic signal at different positions, and facilitate to determine the optimal transmitting and receiving positions so that the receiving probe receives the strongest ultrasonic signal.

[0055] In summary, the brain ultrasonic signal collection device of the application realizes the automatic operation of the brain ultrasonic signal collection, reduces the dependence on the brain ultrasonic signal collection, improves the accuracy of the brain ultrasonic signal collection, and can realize the ultrasonic signal collection with different functions for different application occasions.

[0056] Embodiment 2

[0057] The application embodiment provides a brain ultrasonic imaging method, which comprises: adopting the 360° layered three-dimensional brain ultrasonic signal collected by the ultrasonic signal collection device in the embodiment 1 to perform brain ultrasonic imaging.

[0058] Those skilled in the art can easily understand that the above description is only the preferred embodiment of the application, and is not used to limit the application, and any modification, equivalent replacement and improvement made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. An ultrasound signal acquisition device for the cranium, characterized in that The application relates to a bed body structure (1) and a detection structure (2); the detection structure (2) is fixed on one side of the bed body structure (1) and is used for collecting the ultrasonic signals of the brain of a patient when the patient lies on the bed body structure (1) in a prone or supine position. 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 the brain of the patient lies in the center of the rotating mechanism when the patient lies on the bed body structure (1) in a prone or supine position; the transmitting probe mechanical arm (4) and the receiving probe mechanical arm (7) are fixed on the rotating mechanism; the transmitting probe (10) and the receiving probe (11) are correspondingly fixed on the ends of the transmitting probe mechanical arm (4) and the receiving probe mechanical arm (7) and are respectively used for transmitting ultrasonic signals to the brain and receiving the ultrasonic signals after the ultrasonic signals pass through the brain. The control mechanism is used for controlling the rotation of the rotating mechanism and realizing the 360-degree ultrasonic signal collection of the brain. The rotating mechanism comprises a rotatable annular base (3) and an annular movement track (8) arranged on the annular base (3); the brain of the patient lies in the center of the annular base (3) when the patient lies on the bed body structure (1) in a prone or supine position. First and second motors (6 and 9) are further arranged on the annular movement track (8); the transmitting probe mechanical arm (4) is connected with the output shaft of the first motor (6) through a mechanical shaft (5); the receiving probe (11) is connected with the output shaft of the second motor (9) through a mechanical shaft (5); when the first and second motors (6 and 9) move along the annular movement track (8), the transmitting probe (10) and the receiving probe (11) are correspondingly driven to move. The control mechanism is used for controlling the rotation of the annular base (3) and keeping the relative positions of the first and second motors (6 and 9) on the annular movement track (8) unchanged, so that the 360-degree ultrasonic signal collection of the brain is realized. The control mechanism is further used for controlling the non-rotation of the annular base (3) and changing the relative positions of the first and second motors (6 and 9) on the annular movement track (8), so that the transmitting probe (10) and the receiving probe (11) are driven to transmit ultrasonic signals at different positions of the brain or receive ultrasonic signals at different positions of the brain. The change of the relative positions of the first and second motors (6 and 9) on the annular movement track (8) comprises:

2. The ultrasound signal acquisition apparatus according to claim 1, characterized in that fixing the first motor (6) and making the second motor (9) move on the annular movement track (8), so that the ultrasonic signals are transmitted at the same position of the brain and the ultrasonic signals are received at different positions of the brain; or fixing the second motor (9) and making the first motor (6) move on the annular movement track (8), so that the ultrasonic signals are transmitted at different positions of the brain and the ultrasonic signals are received at the same position of the brain. ​ 3. The ultrasound signal acquisition apparatus according to claim 1 or 2, characterized in that The transmitting probe (10) adopts a single array element structure, and the receiving probe (11) adopts a surface array structure composed of multiple array elements; each array element of the receiving probe (11) is used for receiving a received signal of the transmitted ultrasonic signal at different angles after passing through the brain.

4. The ultrasound signal acquisition apparatus according to claim 3, 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.

5. The ultrasound signal acquisition apparatus of claim 3, wherein Further comprising a moving mechanism arranged on the bed body structure (1) and used for moving the bed body structure (1) to ensure the integrity of the brain ultrasonic signal collection of different patients.

6. The ultrasound signal acquisition apparatus of claim 1, wherein, A solid coupling agent is arranged between an ultrasonic transducer and the brain; wherein the ultrasonic transducer is the transmitting probe (10) and the receiving probe (11).

7. The ultrasound signal acquisition apparatus of claim 1, wherein Further comprising an excitation source used for providing an ultrasonic signal excitation for the transmitting probe (10).

8. The ultrasound signal acquisition apparatus of claim 1, wherein, The annular base (3) rotates by a fixed angle each time.

9. A method of cranial ultrasound imaging, characterized in that, Comprise: Collecting 360° ultrasonic signals of the brain by using the ultrasonic signal collection device according to any one of claims 1-8; Performing brain ultrasonic imaging based on the ultrasonic signals.

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