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An ultrasonic transducer with improved sound field performance and its improvement method

An ultrasonic transducer and sound field technology, applied in ultrasonic/sonic/infrasonic Permian technology, ultrasonic/sonic/infrasound image/data processing, organ motion/change detection, etc. Diagnosing problems such as the diagnostic effect of the diagnostic instrument to achieve the effect of improving accuracy, improving sound field performance, and increasing uniformity

Active Publication Date: 2018-08-07
上海爱声生物医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The intravascular ultrasound catheter works directly in the blood vessel and is the core component of the entire imaging system. The performance of the ultrasonic transducer installed at the distal end of the ultrasound catheter will directly affect the imaging quality, and then affect the diagnostic effect of the ultrasonic diagnostic instrument

Method used

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  • An ultrasonic transducer with improved sound field performance and its improvement method
  • An ultrasonic transducer with improved sound field performance and its improvement method
  • An ultrasonic transducer with improved sound field performance and its improvement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This embodiment takes changing the matching layer 3 as an example, and its structural diagram is as follows image 3 As shown, it includes: backing layer 1, piezoelectric layer 2 and matching layer 3 connected in sequence, the attenuation rate and / or acoustic impedance distribution of matching layer 3 is not uniform, along the horizontal direction of the radiation surface of the transducer, the matching layer The attenuation rate and / or acoustic impedance of 3 gradually increases from the center to the outside, that is, the direction of the arrow in the figure gradually increases, so the vibration at the edge of the radiation surface of the transducer is more attenuated than the center position, Therefore, its vibration amplitude gradually decreases from the center to the edge.

Embodiment 2

[0052] This embodiment also takes changing the matching layer 3 as an example, and its structural diagram is as follows Figure 4 As shown, the difference from Embodiment 1 is that the material used in the matching layer 3 of this embodiment is an anisotropic conductive material, which only conducts electricity in the direction perpendicular to the radiation surface, and the resistance gradually increases along the direction of the arrow. increase, the electrical loss at the edge is greater than that at the center, so the electric field at the edge is weaker.

Embodiment 3

[0054] This embodiment also takes changing the matching layer 3 as an example, and its structural diagram is as follows Figure 5 As shown, it includes: a backing layer 1, a piezoelectric layer 2 and a matching layer 3 connected accordingly, and a prism 4 is mounted on the side of the matching layer 3 that is not in contact with the piezoelectric layer 2, and the thickness of the prism 4 is uneven , along the horizontal direction of the radiation surface of the transducer, the thickness of the prism 4 gradually becomes thicker from the center to the edge; the thicker the edge, the stronger the attenuation, and the thinner the middle, the weaker the attenuation, so that the vibration at the center is stronger than that at the edge Effect.

[0055] The implementation manner of changing the relative vibration amplitude when the ultrasonic wave passes through the backing layer is the same as that of changing the relative vibration amplitude when the ultrasonic wave passes through ...

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Abstract

The invention discloses an ultrasonic transducer with improved sound field performance and its improvement method. The transducer comprises: a backing layer, a piezoelectric layer and a matching layer connected in sequence, wherein, along the radiation surface of the ultrasonic transducer In the horizontal direction, the vibration amplitude distribution generated by the ultrasonic waves passing through the backing layer and / or the piezoelectric layer and / or the matching layer is uneven, showing a large center and small edge distribution. The method includes: reducing the relative vibration amplitude of the edge position of the radiation surface of the ultrasonic transducer, so that the vibration amplitude of the radiation surface of the ultrasonic transducer is distributed in a large center and small edge; making the ultrasonic transducer transmit and / or receive The side lobes of the sound field during ultrasound are reduced. The ultrasonic transducer with improved sound field performance of the present invention and its improvement method, by changing the laminated structure of the ultrasonic transducer, reduces the vibration amplitude of the edge position of the radiating surface of the transducer when receiving or transmitting ultrasonic signals, thereby Reduced side lobes and reduced artifacts.

Description

technical field [0001] The invention relates to an ultrasonic transducer, in particular to an ultrasonic transducer with improved sound field performance and an improving method thereof. Background technique [0002] Intravascular Ultrasound (IVUS) is a new diagnostic method combining non-invasive ultrasound technology and minimally invasive catheter technology. Intravascular ultrasound is the use of catheter technology to introduce a high-frequency micro-ultrasound transducer into the coronary artery cavity for detection, and obtain cross-sectional imaging of each layer of the vessel wall to assist clinicians in diagnosing intravascular lesions. [0003] The intravascular ultrasound imaging system includes three main components: an intravascular ultrasound catheter equipped with an ultrasound probe, a retraction device, and an ultrasound host. The intravascular ultrasound catheter works directly in the blood vessel and is the core component of the entire imaging system. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/12A61B8/08
Inventor 李翔陈友伟赵万金
Owner 上海爱声生物医疗科技有限公司