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A continuous zooming ultrasonic probe and its zooming method

An ultrasonic probe, ultrasonic transducer technology, applied in ultrasonic/sonic/infrasonic diagnosis, ultrasonic/sonic/infrasonic Permian technology, ultrasonic/sonic/infrasonic image/data processing, etc. Micro-imaging system resolution and detection sensitivity, difficulty in obtaining lateral resolution and depth resolution, difficult signal-to-noise ratio for non-zoom ultrasound probes, etc., to achieve the effect of being conducive to popularization and application, improving detection sensitivity, uniform image resolution and contrast

Active Publication Date: 2019-02-01
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the ultrasonic probe used in photoacoustic microscopic imaging technology is difficult to achieve acoustic continuous zoom, difficult to obtain higher lateral resolution and depth resolution, and cannot achieve multi-level imaging in the depth direction; in photoacoustic microscopic imaging Most of the ultrasonic probes used in the technology are non-annular ultrasonic probes, it is difficult to ensure that the incident light is coaxial with the ultrasonic probe, which will eventually affect the resolution and detection sensitivity of the photoacoustic microscopy imaging system; more particularly, for photoacoustic microscopy The speckle light source in the technology, the non-zoom ultrasound probe is difficult to obtain a higher signal-to-noise ratio, and the detection sensitivity is not high

Method used

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  • A continuous zooming ultrasonic probe and its zooming method
  • A continuous zooming ultrasonic probe and its zooming method
  • A continuous zooming ultrasonic probe and its zooming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] combine figure 1 , figure 2 and Figure 10As shown, the annular ultrasonic transducer 2 includes a convex optical lens 2-1, an annular sound-absorbing plate 2-2, and an annular piezoelectric element 2-3, wherein the piezoelectric material of the annular piezoelectric element 2-3 is PVDF pressure Electric thin film, with a thickness of 9 μm, adopts a ring structure with an outer diameter of 8 mm and an inner diameter of 3 mm, the main frequency is 50MHz, the bandwidth is 80%, and the sensitivity is -55dB. The convex optical lens 2-1 is made of optical glass lens material. The convex optical lens is provided with a boss, the diameter of the boss is 3mm, the light transmittance is excellent, and the light transmittance is ≥98%. In this embodiment, the convex The light transmittance of the shaped optical lens is 98%. The ring-shaped sound-absorbing plate 2-2 is made of glass fiber material, with a thickness ranging from 1 to 5 mm (4 mm in this embodiment), a ring struct...

Embodiment 2

[0046] A photoacoustic microscope ultrasonic probe of Example 1 was used to test its performance of transmitting and receiving signals.

[0047] The Olympus 5073PR ultrasonic transmitter receiver was used as the trigger signal source, the emission intensity was 12.5μJ, the pulse repetition frequency was 5KHz; the Taylor oscilloscope TDS2012B was used as the echo signal to receive; the steel block material plate was used as the test block, the thickness was 10MM, and the sound speed was 5320m / s.

[0048] First, connect the Olympus 5073PR ultrasonic transmitter-receiver, Taylor oscilloscope TDS2012B, and the ultrasonic probe in Example 1, and put the Olympus 5073PR ultrasonic transmitter-receiver in the transmitting and receiving state; secondly, apply an appropriate amount on the upper surface of the test block The couplant, the glycerol-ethanol mixture is injected into the cavity 3 of the ultrasonic probe from the liquid inlet pipe 5 of the ultrasonic probe in Example 1 with a...

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Abstract

The invention provides a continuous zooming ultrasonic probe. The continuous zooming ultrasonic probe comprises a shell, an annular ultrasonic transducer and a continuous zooming acoustic lens, wherein the annular ultrasonic transducer is arranged on the inner wall of the shell, and is provided with an emitting / receiving surface for emitting / receiving ultrasonic waves; the continuous zooming acoustic lens comprises a first lens part with acoustic impedance capable of changing continuously and a second lens part provided with a hemispherical groove; and the annular ultrasonic transducer, the inner wall of the shell and the second lens part define a sealed accommodating cavity. The invention further relates to a continuous zooming method. According to the continuous zooming ultrasonic probe and the continuous zooming method, the special acoustic lens capable of realizing continuous zooming is adopted, therefore, the multi-level depth imaging can be realized, the aberration of the special acoustic lens is corrected till reaching the degree of high-resolution imaging having transverse resolution and depth resolution, and the continuous zooming ultrasonic probe and the continuous zooming method belong to the field of nondestructive testing.

Description

technical field [0001] The invention belongs to the field of non-destructive testing, and more particularly, the invention is suitable for the field of photoacoustic microscopy imaging, and relates to a continuous zoom ultrasonic probe and a photoacoustic imaging method thereof. Background technique [0002] Ultrasound diagnosis is a diagnostic method that applies ultrasound detection technology to the human body to understand the data and morphology of physiology or tissue structure by measuring, discovering diseases, and making prompts. Ultrasound diagnosis is a non-invasive, painless, convenient and intuitive and effective inspection method, but its imaging method depends on the acoustic impedance of biological tissues. Since the acoustic impedance of some tumor tissues is not significantly different, this limits the use of ultrasound imaging technology. The application range and its reconstituted images have low contrast. [0003] Photoacoustic imaging technology is a n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/00A61B8/00A61B8/08
CPCA61B5/0059A61B8/085A61B8/4272A61B8/4281A61B8/4444A61B8/4483A61B8/5261
Inventor 杨思华马海钢邢达
Owner SOUTH CHINA NORMAL UNIVERSITY