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Design method of focused acoustic lens

A design method and technology of acoustic lens, applied in ultrasonic therapy, acoustic wave diagnosis, infrasound wave diagnosis and other directions, can solve the problems of human tissue damage, large radial side lobe amplitude, etc., and achieve improved contrast, radial side lobe amplitude suppression, and suppression Diffraction effect

Active Publication Date: 2016-01-20
JIANGSU TINGSN TECH CO LTD
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  • Abstract
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Problems solved by technology

[0010] The purpose of the present invention is to overcome the shortcomings that when the ultrasonic focusing transducer uses the existing acoustic lens to focus, the radial side lobe amplitude near the focus is relatively large, which will cause certain damage to the human tissue around the target area during ultrasonic treatment, and provides A Design Method of Focusing Acoustic Lens

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  • Design method of focused acoustic lens
  • Design method of focused acoustic lens
  • Design method of focused acoustic lens

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Embodiment 1

[0048] A kind of design method of focusing acoustic lens of this embodiment, its design process is as follows figure 1 As shown, the specific steps are:

[0049] Step 1. Select the initial target operating frequency f of the focusing acoustic lens 0 =547kHz, according to the initial target operating frequency f 0 Calculate the longitudinal wave wavelength λ=c / f of the sound wave in the working medium (sound propagation medium) 0 , c is the longitudinal sound velocity of the sound wave in the working medium. On the acoustic radiation surface of the surface of the focusing acoustic lens, that is, a concave spherical surface, periodically distributed concentric annular groove structures are arranged. All the grooves point to the geometric focus of the lens, and the centers of the grooves are located on the axis of the focusing acoustic lens, and each The width of the bottom of the groove is consistent with the width of the top. Set the initial distribution parameters of the g...

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Abstract

The present invention discloses a design method of a focused acoustic lens, belonging to the field of focused ultrasound. According to the invention, an acoustics artificial structure is established on the acoustic radiating surface of a traditional focused acoustic lens, namely, the acoustic radiating surface of the traditional focused acoustic lens is provided with a periodically-distributed concentric ring groove structure, and the groove structure parameters are optimized in design through adoption of a finite element modeling calculation, so that the amplitude of a radial sidelobe at the acoustic focal point may be restrained in a certain range of frequencies and the focusing gain of acoustic energy may be improved. An acoustic lens designed through adoption the design method of a focused acoustic lens provided by the invention may be applicable to the fields of focused ultrasound imaging and focused ultrasound treatment; and moreover, compared with an acoustic lens focusing device in the prior art, the acoustic lens designed through adoption the design method of a focused acoustic lens is able to effectively reduce the amplitude of the radial sidelobe, improve the focusing gain and decrease the deviation of the focal point position.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic therapy, and more specifically relates to a design method of a focusing acoustic lens. Background technique [0002] High Intensity Focused Ultrasound (HIFU) technology is an effective non-destructive trauma treatment technology, which has a good effect on the treatment of deep and solid tumor tissues in the body. On the tissue, through the interaction of cells and ultrasound, irreversible coagulation necrosis occurs in the lesion tissue, so as to achieve the purpose of treatment. At present, this technology has been widely concerned by many scholars and doctors at home and abroad for its harmless, safe and effective advantages, and has been widely used and promoted in urology, oncology, neurosurgery, gynecology, ophthalmology and other medical fields . [0003] Ultrasonic focusing transducer is the core device of HIFU technology. Since the application object of HIFU technology is a living bo...

Claims

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Application Information

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IPC IPC(8): A61N7/00A61B8/00
Inventor 郭霞生林洲章东
Owner JIANGSU TINGSN TECH CO LTD
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