HIFU sound field detection system based on finite element model method

Abstract

The invention relates to an HIFU sound field detection system based on a finite element model method. According to the invention, a finite element model method is adopted to simulate sound field distribution characteristics and sound focusing morphological characteristics of an actual HIFU transducer in a three-dimensional space; the relationship between the driving voltage and the sound pressureof the radiation sound field is obtained; a high-precision industrial mechanical arm is adopted to accurately control and measure the hydrophone to carry out rapid scanning work of a spherical sound field in a three-dimensional space of a high-intensity focused sound field; the spherical planning motion path makes up the influence of phase inconsistency and acoustic radiation angle deviation on sound field measurement; the embedded motion control module and the data acquisition module are integrated and are directly connected with the notebook computer; a measurement system is simplified to the maximum extent, a high-precision industrial mechanical arm is used for accurately scanning a spatial sound field and feeding the spatial sound field back to a finite element type for optimization processing, a finite element model can accurately simulate a HIFU transducer radiation sound field, and a reference mode is provided for a measurement test of an ultrasonic source.

Description

technical field [0001] The invention mainly relates to a method for detecting an ultrasonic source sound field, in particular to a detection system for a high-intensity focused sound field based on a finite element model. Background technique [0002] If medical instruments are subjected to factors such as excessive vibration and noise, it will cause damage to the equipment and affect diagnosis and follow-up medical treatment. The purpose of regular metrological testing of ultrasonic medical equipment is to check and determine the quality and safety of ultrasonic equipment to ensure its normal use. The measurement of the acoustic performance of medical ultrasound sources has become an important branch of medical measurement. The high-intensity focused ultrasound treatment system mainly uses ultrasound to focus and instantly heat the lesion to above 65 degrees to directly inactivate tumor cells. China's completely independent intellectual property rights "Haifu Ultrasonic Fo...

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Problems solved by technology

[0003] At present, there is no effective evaluation system for the dosage and shape of the sound field of HIFU. In order to achieve safe and effective treatment, it is necessary to make an accurate and effective evaluation of the distribution of the sound field, sound pressure distribution, sound power, and the size and shape of the focal area of ​​HIFU. However, the traditional method of measuring ultrasonic sources in medical measurement is still in the stage of large-scale laboratory testing.

Moreover, the detection principles of current detection methods such as radiation force balance method, calorimetric method and grating method determine that they can only obtain a single power index and are not suitable for multi-parameter measurement.

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