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CN-122006156-A - Ultrasonic wave incidence angle correction method, program product and adaptive transducer

CN122006156ACN 122006156 ACN122006156 ACN 122006156ACN-122006156-A

Abstract

The application relates to the technical field of ultrasound, in particular to an ultrasound incidence angle correction method, a program product and an adaptive transducer. According to the method, the incident wave is emitted to the target object, the reflected wave reflected by the target object is received, whether the intensity of the reflected wave reaches a preset condition is judged, if not, the incident angle of the ultrasonic wave can be automatically and real-timely adjusted until the reflected wave reaches the preset condition, so that the incident angle of the ultrasonic wave is matched with the normal direction of the surface of the skull, the problems of sound energy attenuation and efficiency reduction caused by overlarge incident angle are avoided, the dependence on traditional high-resolution medical image equipment is reduced, a complicated and time-consuming personalized customization process is omitted, the efficiency of penetrating the skull by ultrasonic energy is improved, the output energy and focusing effect of the whole transcranial focusing ultrasonic system are optimized, and the reliability and effectiveness of a treatment scheme are improved accordingly.

Inventors

  • JIANG ZHENG
  • Zeng Huaiyang
  • ZHANG JIN

Assignees

  • 上海空山慈科技有限公司

Dates

Publication Date
20260512
Application Date
20260311

Claims (20)

  1. 1. An ultrasonic wave incidence angle correction method, characterized by comprising: Transmitting an incident wave to a target; Receiving reflected waves reflected by the target object; Judging whether the intensity of the reflected wave reaches a preset condition, and if not, adjusting the incident angle until the reflected wave reaches the preset condition.
  2. 2. The method according to claim 1, wherein the step of emitting the incident wave to the target object comprises: The incident wave is emitted towards the skull, which comprises at least the skull cap bone of the animal.
  3. 3. The method according to claim 1, wherein the step of receiving the reflected wave reflected by the object comprises: receiving reflected waves of at least two positions after being reflected by the target object, and obtaining reflected wave intensity values of the at least two positions; the step of judging whether the intensity of the reflected wave reaches a preset condition includes: Comparing the obtained reflected wave intensity values of the at least two positions, and judging whether the difference value between the reflected wave intensity values is within a preset difference value range.
  4. 4. The method according to claim 3, wherein the step of receiving reflected waves reflected from the object at least two positions comprises: and receiving reflected waves at positions on two opposite sides of the original position of the incident wave emission.
  5. 5. The method according to claim 3, wherein the step of receiving reflected waves reflected from the object at least two positions comprises: And receiving reflected waves at least three positions on the virtual circumference taking the axis of the transmitting direction of the incident wave as a perpendicular bisector.
  6. 6. The method according to claim 5, wherein the step of emitting the incident wave to the target object comprises: Transmitting incident waves to a target object through a transmitting array element; the step of receiving reflected waves at least three positions on a virtual circumference with an axis of the incident wave in which the direction of emission is located as a perpendicular bisector includes: The reflected wave after being reflected by the target object is received by a plurality of receiving array elements which are positioned on the plane where the transmitting array element is positioned and on the virtual circumference taking the transmitting array element as the center.
  7. 7. The method according to claim 6, wherein the step of judging whether the intensity of the reflected wave reaches a preset condition, and if not, adjusting the incident angle until the reflected wave reaches the preset condition comprises: Performing action control on the transmitting array element to adjust the incident angle of the transmitting array element; Judging whether the difference value between the reflected wave intensity values received by the receiving array elements after being reflected by the target object is within a preset difference value range or not under different angles, if not, continuing to perform action control on the transmitting array elements, and if the difference value is within the preset difference value range, stopping the action control on the transmitting array elements.
  8. 8. The method according to claim 3, wherein the step of judging whether the difference between the intensity values of the reflected waves is within a predetermined difference range comprises: and judging whether the difference value between the intensity values of the reflected waves is less than 5% of the intensity value of the reflected waves.
  9. 9. The method according to claim 1, wherein the step of receiving the reflected wave reflected by the object comprises: Receiving a plurality of groups of reflected waves reflected by the target object under different incident angles at an incident wave transmitting in-situ position, and obtaining the intensity values of the plurality of groups of reflected waves; the step of judging whether the intensity of the reflected wave reaches a preset condition includes: Comparing the obtained multiple groups of reflected wave intensity values with a preset maximum intensity value, and judging whether the difference value between each reflected wave intensity value and the preset maximum intensity value is within a preset difference value range.
  10. 10. The method of claim 9, wherein the step of transmitting the incident wave to the target object comprises: Transmitting incident waves to a target object through a transmitting array element; the step of receiving a plurality of groups of reflected waves reflected by the target object under different incident angles at the in-situ position of incident wave emission comprises the following steps: And receiving a plurality of groups of reflected waves reflected by the target object under different incident angles in real time by taking the transmitting array element as a receiving array element.
  11. 11. The method according to claim 10, wherein the step of adjusting the incident angle until the reflected wave reaches a preset condition comprises: Performing action control on the transmitting array element to adjust the incident angle of the transmitting array element; And judging whether the difference value between the reflected wave intensity value received by the receiving array element in real time and the preset maximum intensity value is within a preset difference value range, if not, continuing to perform action control on the transmitting array, and stopping the action control on the transmitting array element when the difference value is within the preset difference value range.
  12. 12. The method according to claim 9, wherein the step of judging whether the difference between each reflected wave intensity value and the preset maximum intensity value is within a preset difference range comprises: And judging whether the difference value between each reflected wave intensity value and the preset maximum intensity value is smaller than 5% of the preset maximum intensity value.
  13. 13. A computer program product comprising a computer program which, when executed by a processor, implements the method of correcting an angle of incidence of ultrasound waves according to any of claims 1 to 12.
  14. 14. An adaptive transducer, comprising: the transducer assembly can emit incident waves to a target object and receive reflected waves reflected by the target object; A bracket coupled to the transducer assembly; the actuating mechanism is connected with the bracket and used for driving the bracket to move; and the control system is respectively and electrically connected with the transducer assembly and the actuating mechanism, and is configured to receive the intensity signal of the reflected wave, and generate a driving instruction to the actuating mechanism to operate according to the intensity signal so as to adjust the incident angle of the transducer assembly relative to the target object.
  15. 15. The adaptive transducer of claim 14, wherein the control system is configured to obtain an intensity signal of the reflected wave received by the transducer assembly, determine whether the transducer assembly is at a predetermined angle of incidence based on the intensity signal of the reflected wave, and if not, control the actuation mechanism until the transducer assembly is adjusted to the predetermined angle of incidence.
  16. 16. The adaptive transducer of claim 15, wherein the transducer assembly comprises: The transmitting array element is arranged on the surface of the bracket and used for transmitting incident waves to a target object; The three receiving array elements are respectively arranged on the virtual circumference of the surface of the bracket, which takes the axis of the transmitting direction of the incident wave of the transmitting array element as a perpendicular bisector, and are used for receiving the reflected wave reflected by the target after being transmitted by the transmitting array element; The control system is used for comparing the intensity values of the reflected waves received by the receiving array elements and controlling the actuating mechanism to operate until the difference value of the intensity values of the reflected waves received by the receiving array elements is within a preset difference value range.
  17. 17. The adaptive transducer of claim 15, wherein the transducer assembly comprises: the transmitting and receiving array element is arranged on the surface of the bracket, and is used for transmitting incident waves to a target object and receiving reflected waves reflected by the target object; The control system is used for obtaining the intensity value of the reflected wave received by the transmitting and receiving array element and controlling the actuating mechanism to operate until the difference value between the intensity value of the reflected wave received by the transmitting and receiving array element and the preset maximum intensity value is within the preset difference value range.
  18. 18. The adaptive transducer of any one of claims 14 to 17, further comprising a body frame having a plurality of array partitions formed thereon; The transducer assembly, the support and the actuating mechanism are respectively and correspondingly arranged in each array partition, and the control system is electrically connected with the transducer assembly and the actuating mechanism in each array partition and independently controls the operation of each actuating mechanism.
  19. 19. The adaptive transducer of claim 18, wherein the body frame is cambered and the transducer assembly faces a concave side of the body frame.
  20. 20. An adaptive transducer according to any one of claims 14 to 17, wherein the actuation mechanism comprises: the plurality of swinging units are respectively arranged on one side of the bracket; the swing unit supports the support together and can drive the support to move through swing so as to adjust the incident angle of the transducer assembly relative to the target object; The swing unit includes: The screw rod assembly is provided with a screw rod and a sliding block which is movably matched with the screw rod; One end of the swing arm is movably connected with the sliding block, and the other end of the swing arm is movably connected with the bracket; The driving piece is connected with the screw rod, is electrically connected with the control system and can drive the screw rod to move with the sliding block under the control of the control system so as to drive the bracket to move through the swing of the swing arm.

Description

Ultrasonic wave incidence angle correction method, program product and adaptive transducer Technical Field The application relates to the technical field of ultrasound, in particular to an ultrasound incidence angle correction method, a program product and an adaptive transducer. Background Transcranial focused ultrasound is a non-invasive neuromodulation and therapy technique that focuses emitted ultrasonic energy at an intracranial target by arranging a plurality of transducer elements on a particular curved surface. To overcome the strong reflection and absorption of ultrasound by the skull, a phased array transducer is often used to ensure that sufficient energy penetrates the skull to the focus. Existing phased array transducers typically employ a rigid fixed spherical or curved frame on which the transducer element positions and angles are preset and are not variable. Due to the complex geometry and curvature variations of the skull surface of different individuals, the fixation structure results in a large angle of incidence between the ultrasound beam of the partial array element and the local skull surface normal. According to acoustic principles, when the angle of incidence is too large, significant refraction, reflection and mode conversion (e.g., longitudinal to transverse) of the ultrasound occurs as it passes through the skull, resulting in a sharp attenuation of the effective acoustic energy passing through the skull. Therefore, when using a fixed phased array transducer, it is often necessary to identify and shut down those array elements with excessive incidence angles and extremely low expected penetration efficiency based on pre-scan or skull image data (e.g., CT, MRI), which undoubtedly reduces the number of active array elements, reduces the acoustic energy output and focusing performance of the overall phased array, and affects the therapeutic effect. In order to cope with individual differences in the shape of the skull, there are also solutions in the prior art to personalize the phased array structure by means of a three-dimensional model of the skull of the patient. However, this solution relies on acquiring high-precision skull image data, and requires complex modeling, design and manufacturing procedures, long implementation cycle, high cost, and possibly introducing additional errors during manufacturing and assembly, which makes it difficult to quickly and easily adapt to clinical treatment scenarios. In addition, there are also proposals to try to calculate and guide the adjustment of the angle of incidence of the transducer based on the skull image data, but the adjustment process still requires support from external imaging equipment, and closed-loop adaptive adjustment cannot be achieved. Therefore, how to realize a method and a device capable of automatically and real-time adjusting the incidence angle of ultrasonic waves according to the surface shape of a target object (such as skull) without depending on time-consuming and expensive external skull image data and personalized customization flow, so as to maximize the ultrasonic penetration efficiency, is a technical problem to be solved in the prior art. Disclosure of Invention In order to solve the technical problems mentioned in the background art, namely the problems of overlarge incidence angle of partial array elements and low ultrasonic penetration efficiency caused by individual differences of the surface shapes of skull bones when using a fixed phased array transducer for treatment, and long period and high cost of a personalized customization process depending on external imaging data, the invention provides an ultrasonic incidence angle correction method, which comprises the following steps: Transmitting an incident wave to a target; Receiving reflected waves reflected by the target object; Judging whether the intensity of the reflected wave reaches a preset condition, and if not, adjusting the incident angle until the reflected wave reaches the preset condition. The method provides an adaptive angle correction scheme independent of external imaging devices (e.g., CT, MRI). By forming a closed loop control system of 'transmitting-receiving-judging-adjusting', the incident angle of ultrasonic waves can be automatically and real-time adjusted to match the normal direction of the local surface of a target object (such as skull). The problems of overlarge incident angle and serious attenuation of ultrasonic energy caused by fixed array element positions and angles in the prior art are solved. By optimizing the incidence angle of each array element, the energy transmission efficiency of ultrasonic waves passing through the skull is effectively improved, so that the overall acoustic energy output and focusing performance of the whole transcranial focusing ultrasonic system are improved, and the treatment scheme is optimized. Optionally, the step of emitting the incident wave towards the target comprises emitting the