A multi-slot coaxial microwave antenna for liver tumor ablation

Ge, Mengke; Jiang, Hua; Huang, Xiaoyan; Zhou, Yufu; Zhi, Debo; Zhao, Gang; Chen, Yuping; Wang, Lulu; Qiu, Bensheng

doi:10.1088/1361-6560/aad9c5

Cited by 32 publications

(41 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To achieve both near-spherical ablation areas and good heating efficiency, Ge et al [45] proposed a periodic ten-slot antenna with an π impedance matching network, which was used to match the impedance between the antenna and the coaxial line for higher heating efficiency.…”

Section: Design Of Antenna Slotsmentioning

confidence: 99%

“…The second existing design is a π type impedance matching network, which is equivalent to two capacitors (C 1 and C 2 ) in parallel with a inductor (L 1 ) in series [45], as shown in Fig. 11B.…”

Section: Designs To Improve the Efficiencymentioning

confidence: 99%

“…Compared with an antenna that can generate an omni-directional ablation zone pattern, a directional antenna can simplify the treatment and offer protection to normal tissues when tumors are adjacent to vulnerable biological structures [42,43]. When the efficiency of the antenna is not satisfactory by just optimizing the antenna structural parameters, an impedance matching network can be implemented in the design of antennas as a means to further improve the efficacy [41,44,45].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A review of antenna designs for percutaneous microwave ablation

et al. 2021

View full text Add to dashboard Cite

Microwave (MW) antenna is a key element in microwave ablation (MWA) treatments as the means that energy is delivered in a focused manner to the tumor and its surrounding area. The energy delivered results in a rise in temperature to a lethal level, resulting in cell death in the ablation zone. The delivery of energy and hence the success of MWA is closely dependent on the structure of the antennas. Therefore, three design criteria, such as expected ablation zone pattern, efficiency of energy delivery, and minimization of the diameter of the antennas have been the focus along the evolution of the MW antenna. To further improve the performance of MWA in the treatment of various tumors through inventing novel antennas, this article reviews the state-of-the-art and summarizes the development of MW antenna designs regarding the three design criteria.

show abstract

Section: Design Of Antenna Slotsmentioning

confidence: 99%

Section: Designs To Improve the Efficiencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A review of antenna designs for percutaneous microwave ablation

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The ablative treatment family includes microwave ablation (MWA), radiofrequency ablation (RFA), ethanol ablation, laser ablation, and cryoablation [12][13][14][15][16][17]. Recently, a wide number of experimental and theoretical works have been focused on improving MWA [18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Human Cancer Therapy Using Microwave Ablation

2019

View full text Add to dashboard Cite

Microwave ablation is one type of hyperthermia treatment of cancer that involves heating tumor cells. This technique uses electromagnetic wave effects to kill cancer cells. A micro-coaxial antenna is introduced into the biological tissue. The radiation emitted by the antenna is absorbed by the tissue and leads to the heating of cancer cells. The diffuse increase in temperature should reach a certain value to achieve the treatment of cancer cells but it should be less than a certain other value to avoid damaging normal cells. This is why hyperthermia treatment should be carefully monitored. A numerical simulation is useful and may provide valuable information. The bio-heat equation and Maxwell’s equations are solved using the finite element method. Electro-thermal effects, temperature distribution profile, specific absorption rate (SAR), and fraction of necrotic tissue within cancer cells are analyzed. The results show that SAR and temperature distribution are strongly affected by input microwave power. High microwave power causes a high SAR value and raises the temperature above 50 °C, which may destroy healthy cells. It is revealed that with a power of 10 W, the tumor cells will be killed without damaging the surrounding tissue.

show abstract

“…In addition, a dual-slot coaxial single-antenna scheme was developed to treat cancer tissue using microwave [15]. In [16], a multi-slot coaxial MW single-antenna scheme was proposed to ablate liver tumors.…”

Section: Introductionmentioning

confidence: 99%

Triple Coaxial-Half-Slot Antenna Scheme With Deep Learning-Based Temperature Prediction for Hepatic Microwave Ablation: Finite Element Analysis and In Vitro Experiment

Phasukkit

Wongketsada

2021

IEEE Access

View full text Add to dashboard Cite

This research proposes a triple-antenna scheme of three coaxial half slot antennas (CHSA) for minimally invasive hepatic microwave ablation (MWA). In the MWA treatment, the antennas were positioned around the cancer tissue in equilateral triangle formation, with the half-slot side of the antennas directed at the triangle center to concentrate the microwave energy. Finite element (FE) simulations and in vitro experiments with swine liver were carried out to determine the temperatures and coagulation zone under different distances between the three antennas: 10, 20, and 30 mm. Besides, a regression-based deep learning algorithm was utilized to predict temperatures at the midpoint of the triple-CHSA arrangement without inserting a temperature sensor into the targeted tissue. The algorithm relied on temperatures at a site adjacent to the targeted cancer tissue to predict the midpoint temperatures. The triple-CHSA scheme could achieve a large coagulation zone with temperatures of 60 °C or higher. The FE simulation results showed that the largest coagulation volumes achieved were 18.425, 29.312, and 63.507 cm3 for the between-antenna distances of 10, 20, and 30 mm, respectively. The largest coagulation volumes of in vitro experiments were 18.437, 29.317, and 63.504 cm3 for the corresponding between-antenna distances. The prediction accuracy of the deep learning algorithm were 99.98 % for mean square error, 98.75 % for mean absolute error, and 99.22 % for mean absolute percentage error. The novelty of the research lies in the use of CHSA surrounding the cancer tissue in equilateral triangle formation for hepatic MWA, as opposed to the conventional hepatic MWA procedure which requires inserting antennas into the targeted tissue. Another research novelty is the use of regression-based deep learning algorithm to predict the temperature of liver tissue at the midpoint of the triple-CHSA arrangement.INDEX TERMS triple antenna, microwave (MA) ablation, Coaxial-half-slot Antenna, temperature prediction, finite element (FE) analysis, In Vitro experiment, directional

show abstract

A multi-slot coaxial microwave antenna for liver tumor ablation

Cited by 32 publications

References 30 publications

A review of antenna designs for percutaneous microwave ablation

A review of antenna designs for percutaneous microwave ablation

Numerical Analysis of Human Cancer Therapy Using Microwave Ablation

Triple Coaxial-Half-Slot Antenna Scheme With Deep Learning-Based Temperature Prediction for Hepatic Microwave Ablation: Finite Element Analysis and In Vitro Experiment

Contact Info

Product

Resources

About