In recent years, the incidence of tumours in the world has increased year by year, and many patients with malignant tumours have lost the opportunity to obtain radical surgery for various reasons (e.g. lung cancer, liver cancer, etc. are mostly at an advanced stage when discovered), therefore, the development of minimally invasive therapy for tumour treatment has become the current trend of medical research in tumour treatment.

With the development of minimally invasive technology, microwave ablation of tumour has become one of the effective methods of modern comprehensive tumour treatment. Microwave ablation therapy has the advantages of small incision, low pain, good effect and fast healing. Microwave ablation has the advantages of less invasive, less painful, more effective and faster healing. Wattsine Microwave Source has been working on this too!

At present, microwave ablation equipment commonly used microwave frequency is 915MHz and 2.45GHz, of which 2.45GHz microwave ablation instrument is most commonly used in clinical practice. With the development of minimally invasive technology, tumour microwave ablation technology as well as become one of the effective methods of modern comprehensive tumour treatment.

All microwave ablators include a microwave power source, a microwave transmission cable and a microwave ablation needle (antenna). The principle is that the microwave power source (microwave generator) generates and emits a high power microwave signal, which is transmitted to the microwave ablation needle (antenna) through the microwave cable.

The microwave power source is the core component of the microwave ablation equipment, which generates and transmits high power microwave signals. Previously, the industry has mainly used magnetrons as the microwave power source. However, magnetrons have disadvantages such as uncontrollable frequency, complex frequency, linear power control and inability to effectively detect forward and reverse power, which are the main reasons for the effectiveness of microwave ablation.

In line with the development of microwave technology, a solid-state power source, also known as a semiconductor solid-state microwave source, is a controllable microwave power source designed using the most advanced high-power semiconductor power devices and control devices.

Microwave ablation principle diagram

The semiconductor solid-state microwave source is used in microwave ablation equipment with precisely adjustable frequency and power, real-time monitoring of the microwave source status, and real-time frequency adjustment according to changes in the state of the ablated tissue to achieve the best antenna radiation effect. This is an advantage over traditional magnetron microwave sources.

In order to verify the improved effect of the semiconductor solid-state microwave source compared with the traditional magnetron on the ablation effect, a scholar used the semiconductor microwave source and the magnetron to ablate pig liver with the same type of microwave ablation needle. The output frequency of the magnetron was 2450 MHz and the power was 80 W. The output frequency of the semiconductor microwave source was set automatically according to the tissue to be ablated, and the output power was 50 W. The ablation time was five minutes.

Ablation effect comparison

The final scholarly analysis concluded that the ablation range of the magnetron type was 100px*62.5px and the ablation range of the semiconductor microwave power source was 100px*75px.