Magnetic resonance compatibility radio-frequency ablation apparatus and ablation needle

Abstract

The invention discloses a magnetic resonance compatibility radio-frequency ablation apparatus and an ablation needle. The ablation apparatus comprises a control module for generating radio-frequency signals, a power module for generating energy, a magnetic compatibility display for conducting display in a magnetic resonance room, a mouse for operating magnetic compatibility and the individual multi-stage ablation needle of compatibility. With the application of the apparatus, by virtue of the mouse and the display, the ablation apparatus can be regulated and controlled by a doctor through a human-computer interaction interface, and magnetic resonance real-time imaging is implemented to judge an ablation process, so that an ablation effect is enhanced and patient's pain is reduced; alternating current is converted into direct current and is supplied; a control board is in charge of controlling output power, and primary filtering is conducted; by virtue of an amplifying plate, the radio-frequency signals are amplified into the radio-frequency energy applicable to ablation; by virtue of a display plate, ablation time, ablation temperature and ablation power are displayed; and the ablation needle is injected with physiological saline in an ablation process, so that an ablation area is improved.

Description

technical field [0001] The invention belongs to the field of medical equipment, and in particular relates to a magnetic resonance compatible radiofrequency ablation instrument and an ablation needle. Background technique [0002] Radio frequency (RF) refers to the electromagnetic frequency with a frequency between 300KHz and 300GHz. The main effect on the living body is the thermal effect. When the frequency of the radio frequency current is high to a certain value (>100kHz), the rapid change of the electromagnetic field makes the cell The positive and negative ions move quickly, so the friction between them and other molecules and ions in the cells will heat up the lesion, causing the water inside and outside the cells to evaporate, dry, pyknosis and fall off, resulting in aseptic necrosis, so as to achieve the goal of treatment. Purpose. [0003] Radiofrequency ablation requires interpolating the ablation electrode to the center of the lesion, and transmitting radiofre...

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Problems solved by technology

[0004] Since the effect of radiofrequency ablation is related to whether the ablation needle is inserted into the center of the lesion, it is necessary to accurately observe the position of the needle; since the reduction of normal cell damage is related to the size of the ablation range, and the ablation effect is related to the ablation temperature, it is necessary to observe the ablation process in real time. In some ablation instruments, CT and B-ultrasound are mostly used for judging the position of the ablation needle and the ablation range. However, B-ultrasound scanning requires the patient to inject a contrast medium in order to measure more accurately, while CT scanning cannot be measured in real time, and the radiation is relatively large; In some ablation instruments, the ablation temperature is often judged by integrating thermocouple measurement on the electrode or calculating the ablation power, but the thermocouple measurement can only measure the temperature near the needle tip, which cannot reflect the overall ablation effect well, which may be affected by carbonization due to excessive local temperature Ablation, while the power measurement is the temperature information obtained by calculating the power value, the error is large

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