Please select the most similar patent number from A, B, C and D. Which number is?
The present disclosure relates to the technical field of acoustic wave transducers, and provides an acoustic wave transducer and a driving method, which can at least partially solve the problem of low focus position adjustment accuracy of existing acoustic wave transducers. The acoustic wave transducer of the present disclosure comprises: a plurality of unit groups, at least some of the plurality of unit groups each comprising a plurality of acoustic wave transduction units, the plurality of acoustic wave transduction units being configured to perform the same operation, and each acoustic wave transduction unit being configured to perform at least one of the following: converting an acoustic wave into an electric signal, and converting the electric signal into an acoustic wave signal; and a plurality of array element signal ends, each of the plurality of array element signal ends being connected to at least two adjacent unit groups, the array element signal ends being connected to different unit groups by means of different switching devices, each switching device being configured to control the connection/disconnection between the array element signal end and the unit group connected thereto, and some of the unit groups connected to any two adjacent array element signal ends being the same.
A: An ultrasonic endoscope probe and an ultrasonic endoscope system. The ultrasonic endoscope probe comprises a plurality of ultrasonic transducers (20) which are arranged in an annular array; the ultrasonic transducers (20) constitute a transducer array which is arranged in M rows and N columns, that is, each column of the transducer array is composed of at least two ultrasonic transducers (20); due to the transducer array, the ultrasonic endoscope probe not only has good focusing capability in an array distribution direction, but also achieves sound focusing in the extending direction of array elements in each column by changing a pore size, so that the ultrasonic endoscope probe can obtain uniform and consistent acoustic images in near, middle and far fields. Compared with an ultrasonic endoscope probe in the prior art, the detection range of the ultrasonic endoscope probe is greatly widened.
B: Disclosed is an imaging method in ultrasound scanning. The method comprises: generating a shear wave in a target tissue (S10); selecting an ultrasonic transducer array element group in an ultrasonic probe, and determining a focus position and a transmitting aperture corresponding to the ultrasonic transducer array element group, such that a sound field boundary range formed by the ultrasonic transducer array element group completely covers a region of interest in the target tissue (S11); determining a relative time delay between the transmission times of ultrasonic wave array elements, and controlling the array elements to transmit ultrasonic waves according to the corresponding relative time delays, so as to cause a transmission focusing effect (S12); within a continuous time period, receiving ultrasonic echoes returned from the region of interest, obtaining echo information of different positions in the region of interest corresponding to different time points, and obtaining, according to the echo information, shear wave information corresponding to the region of interest (S14). Also disclosed in the present invention are a corresponding apparatus for performing the foregoing imaging method, as well as an ultrasonic imaging system, which can be widely applied to obtain accurate echo information, as well as to effectively improve imaging frame rates and signal quality.
C: Provided is an ultrasonic sensor (100), comprising a sensing array (110), wherein the sensing array (110) comprises multiple sensing units (210) arranged in an array, with each of the multiple sensing units (210) comprising a first ultrasonic transducer (211) and a second ultrasonic transducer (212), respectively; the first ultrasonic transducer (211) is used for emitting a sensed ultrasonic wave; the second ultrasonic transducer (212) is used for receiving a reflected ultrasonic wave corresponding to the ultrasonic wave; the first ultrasonic transducer (211) and the second ultrasonic transducer (212) are arranged in parallel on a plane; and the first ultrasonic transducer (211) and the second ultrasonic transducer (212) have the same central shaft (210C), which is perpendicular to the plane.
D: Disclosed is an ultrasonic transducer, comprising a housing (5), wherein the housing (5) is internally provided with a piezoelectric layer (3), the piezoelectric layer (3) is formed by at least two piezoelectric array elements, and the frequency interval between the piezoelectric array elements is 50 kHz to 1.2 MHz. An acoustic lens (2) is provided at the front end of the piezoelectric layer (3). The acoustic lens (2) is used to make sure that the piezoelectric array elements of different frequencies have a common focus. Further disclosed is a method for manufacturing the ultrasonic transducer.
Answer: D