System and method for compensating flow heat loss by utilizing additional heat generated through flow microbubble cavitation in focused ultrasound field

Abstract

The invention discloses a system and method for compensating flow heat loss by utilizing additional heat generated through flow microbubble cavitation in a focused ultrasound field. When focused ultrasound acts on a local medium containing flow liquid, microbubble is injected into the medium and arrives at the focused ultrasound field following the flow liquid. Under the action of the focused ultrasound, the additional heat generated by utilizing a flow microbubble cavitation synergistic mechanism is used for compensating the heat carried away by the flow liquid, thereby promoting the rising of the temperature of the local medium nearby a pipeline. The system comprises a main control system, a power amplifier, a focused ultrasonic transducer and a microbubble flow velocity control pump. In the invention, transient physics of the flow microbubble, such as cavitation and the like, occur under the action of ultrasound and the effects of reflection, scattering and the like on the ultrasound are enhanced; the additional heat generated by utilizing the flow microbubble cavitation synergistic mechanism can be used for compensating the heat carried away by the flow, thereby enhancing the heating efficiency of the ultrasound.

Description

Technical field: [0001] The invention belongs to the field of focused ultrasound, and in particular relates to a system and method for compensating the heat taken away by flow by utilizing the additional heat generated by cavitation of flow microbubbles in a focused ultrasound field. Background technique: [0002] When ultrasound propagates in the medium, part of the ultrasonic energy is absorbed by the medium and converted into heat energy, which causes the temperature of the medium to rise. Utilizing the advantages of focused ultrasound in vitro focusing, rapid, and local heating, especially the use of high-intensity focused ultrasound, encouraging pioneering results have been achieved in clinical tumor hyperthermia. However, this focused ultrasound local heating technology still has problems such as low efficiency and long time to be solved. Due to heat conduction, especially when the medium contains a lot of flowing liquid, the heat taken away by the flow hinders the in...

AI Technical Summary

Problems solved by technology

Increasing the single ultrasonic power or action time can increase the temperature of the target area, but at the same time, the temperature of the normal tissue on the ultrasonic propagation path and the surrounding target area will be too high, resulting in toxic side effects

In addition, the effect of heat removal by flow can be reduced by means of blocking blood supply and injecting iodized oil, but such invasive methods increase human suffering and risk

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