Ultrasound thermal therapy system for superficial tissues

Abstract

The invention discloses an ultrasound thermal therapy system for superficial tissues, belonging to the technical field of biomedical engineering. The ultrasound thermal therapy system comprises a computer, a microcontroller, a digital frequency synthesis unit, a filtering and preamplification unit, a power amplifier, a power feedback monitoring loop and a combined focusing ultrasound therapy head, wherein the computer is connected with the microcontroller which is connected with the digital frequency synthesis unit; the digital frequency synthesis unit is connected with the filtering and preamplification unit which is connected with the power amplifier; the power amplifier is connected with the combined focusing ultrasound therapy head; one end of the power feedback monitoring loop is connected with the microcontroller; and the other end of the power feedback monitoring loop is connected with the power amplifier. The invention overcomes the defect that the traditional ultrasound thermal therapy system controls the therapy effect only by the experience of doctors; the invention can effectively monitor and accurately adjust the numerical value of high-frequency electric power so as to improve the therapy quality of the superficial tissues in the ultrasound thermal therapy process.

Description

technical field [0001] The invention relates to a system in the technical field of biomedical engineering, in particular to a superficial tissue ultrasonic hyperthermia system. Background technique [0002] The hyperthermia system developed by the biological effects of physical factors such as ultrasound, radio frequency or microwave is used to treat tissues, which is another conventional treatment method after surgery, radiotherapy and chemotherapy. Ultrasonic hyperthermia is easy to achieve uniform heating of tissues, has good curative effect, has no side effects, and has no ionization or electromagnetic radiation. It will neither cause health damage to medical staff nor cause environmental pollution. It is a new and effective therapeutic organization. s method. Animal experiments and clinical studies have shown that in superficial tissue treatment, ultrasonic hyperthermia is also one of the effective means, which not only has a direct killing effect on tissue cells, but ...

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Problems solved by technology

[0003] After searching the existing literature, it is found that the Chinese patent application number is: 01144259.X, and the name is: ultrasonic gynecology and skin lesion treatment instrument. This technology realizes the self-adaptive control of electric power through the control unit, but there are obvious shortcomings in this technology: the first , the high-frequency electric power driving the combined focused ultrasound treatment head lacks effective monitoring, that is, the system can only judge the presence or absence of its electric power, but cannot clearly detect the value of its high-frequency electric power, which may cause superficial damage when the electric power value is out of control. The damage of the tissue may not achieve the expected effect, that is to say, the safety needs to be further improved; second, the electrical signal generation part is mostly realized by analog technology, so the errors in the pulse width, frequency and amplitude and other indicators are relatively large and adjustment Unchanged, it is not conducive to the dynamic real-time and accurate control of the system, that is to say, the control effectiveness needs to be further improved

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