High-power high-intensity focused ultrasound driving system based on STM32F334

Abstract

The invention discloses a high-power high-intensity focused ultrasound driving system based on STM32F334. The high-power high-intensity focused ultrasound driving system is composed of an ARM controlunit, a UI control unit, a digital power supply unit, a radio frequency driving unit, a fan control unit and a respiratory gating unit, all the units are controlled and coordinated by a same chip of STM32F334. Compared with a classic MCU plus FPGA control scheme, the high-power high-intensity focused ultrasound driving system is high in integration and good in reliability, high-precision timer resources in the STM32F334 chip is fully used, frequency division can be carried out downwards from 4.608GHz, the highest resolution can reach 217ps, and the precision of PWM driving signals of a phase shift full bridge of the digital power supply unit and an H bridge of the radio frequency driving unit is ensured; and meanwhile, the respiratory gating unit uses high-speed ADC in the STM32F334 chip to collect respiratory signals, and during the treatment process, the synchronization between the radio frequency driving unit and the respiratory gating unit is further improved.

Description

technical field [0001] The present invention mainly relates to the field of medical ultrasound therapy. The mainstream ARM plus FPGA solution adopted by the current High Intensity Focused Ultrasound (HIFU) drive system has high cost, low integration, low precision of radio frequency drive signal, and breath synchronization processing. The real-time performance is not high, and the whole drive system needs additional power supply. In order to eliminate these defects, a high-power high-intensity focused ultrasound drive system based on STM32F334 is designed. Background technique [0002] The rapid development of the modern electronic information industry has also led to the progress of medical technology, and the surgery in the 21st century has also entered the era of non-invasive surgery from minimally invasive. As an emerging technology, high-intensity focused ultrasound (HIFU) has been widely used in medicine and cosmetology, and has achieved good results, especially in som...

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Problems solved by technology

[0006] The problem to be solved by the present invention is: because the sound intensity of the ultrasonic wave will be lost before passing through the human body and reaching the affected area, the useful sound intensity is not enough when the ultrasonic beam reaches the affected area when the sound power is relatively small at the beginning. To ablate the diseased tissue; or because some human organs are far away from the body surface, it is more difficult for ultrasound to make the necessary ultrasound intensity penetrate the human tissue to reach the diseased lesion, so that the proper treatment cannot be achieved at all. In addition, during the treatment process, because the accuracy of the driving signal is not high enough, the entire driving system cannot be well synchronized with human breathing, resulting in poor treatment effect

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