Electrically controllable radiofrequency ablation device with variable radiation direction

Abstract

The invention belongs to the technical field of radio frequency medical treatment, and particularly relates to an electrically controllable radiofrequency ablation device with a variable radiation direction. The electrically controllable radiofrequency ablation device comprises a phased array radar and arrayed radiofrequency ablation needle heads, and the arrayed radiofrequency ablation needle heads are scanned through the phased array radar so as to perform radiation output. The phased array radar comprises a switch array and a Butler matrix circuit based on a substrate integrated waveguide, and during radiation output, an input port of the Butler matrix circuit is selected through the switch array to perform direction bias on radiation output. According to the electrically controllable radiofrequency ablation device with the variable radiation direction, the Butler matrix circuit based on the substrate integrated waveguide is adopted to perform phase deviation on an output wave beam, so that the action direction is changed under the condition that an instrument does not need to be moved, a coverage area is increased, the defects during use of a single needle are effectively avoided, various clinical requirements are effectively met, and meanwhile, the Butler matrix based on the substrate integrated waveguide, which is variable in electric control, is realized through an electrochromic device.

Description

technical field [0001] The invention belongs to the technical field of radiofrequency medical treatment, and in particular relates to an electrically controllable radiofrequency ablation device with variable radiation direction. Background technique [0002] Radiofrequency ablation (RFA) is a kind of thermal coagulation therapy. It uses radio frequency alternating current with a wavelength of 460-500 kHz to generate heat by high-speed oscillation and friction of charged particles in the surrounding tissue through radio frequency electrode needles. The temperature can reach 50 ~110°C, causing coagulation necrosis of tumor cells around the electrode, thereby inactivating a new minimally invasive treatment method for tumor cells. The degree of heat production is positively correlated with current intensity and duration, negatively correlated with impedance, and correlated with tissue Water content, tissue blood flow, and speed of warming are closely related. Radiofrequency abl...

AI Technical Summary

Problems solved by technology

[0003] At present, in the field of radiofrequency ablation, if a single needle is used for ablation, the ablation area is limited. For large tumor areas, it is very likely that the effective area cannot be covered, and due to the length of the device itself, it cannot be turned freely in the human body, which greatly increases the difficulty of operation. And the radiation area of ​​the tissue is very limited, and the overly complicated operation method is not conducive to the clinical use of the system

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