Numerical study on thermal field of microwave ablation with water-cooled antenna

Lu, Yao; Nan, Qun; Li, Liang; Liu, Youjun

doi:10.1080/02656730802587720

Cited by 24 publications

(24 citation statements)

References 7 publications

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“…This different result between the two experiments, with and without the CT control, suggests that the expansion is due to the presence of gasses generated by the very high temperatures reached close to the MW antenna which tend to escape from the tissue. In fact, close to the MW antenna, temperatures as high as 100 C-120 C were reached, which caused the vaporisation of liquids [24] and a change in the tissue dielectric and thermal properties [25][26][27][28][29]. The movement of the gas is linked to the tissue structure (e.g.…”

Section: Discussionmentioning

confidence: 97%

Characterisation of tissue shrinkage during microwave thermal ablation

Farina

Weiss

Nissenbaum³

et al. 2014

International Journal of Hyperthermia

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Section: Discussionmentioning

confidence: 97%

Characterisation of tissue shrinkage during microwave thermal ablation

Farina

Weiss

Nissenbaum³

et al. 2014

International Journal of Hyperthermia

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“…These had improved performance in arrays when compared to a helical array. There are other more recent MW antenna designs that have been reported [14,46,[53][54][55][56][57] and a retrospective article is available comparing various designs [58].…”

Section: Mw Antenna Design Evolutionmentioning

confidence: 96%

“…A review article of the developmental history of MW ablation methods and practices may provide more details [45]. By the year 2000, the practice of percutaneously inserted, sharp needle microwave antennas for coagulation therapy with internal water flow cooling was in clinical practice and being commercially sold within China to treat cancerous tumours [46].…”

Section: Validation Of Mw Performancementioning

confidence: 99%

Interstitial microwave transition from hyperthermia to ablation: Historical perspectives and current trends in thermal therapy

Ryan¹,

Turner

Hamilton

2010

International Journal of Hyperthermia

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This work reviews the transition from hyperthermia to ablation for cancer treatment with interstitial microwave (MW) antennas. Early work utilising MW energy for thermal treatment of cancer tissue began in the late 1970s using single antennas applied interstitially or the use of multiple interstitial antennas driven with the same phase and equal power at 915 or 2450 MHz. The original antenna designs utilised monopole or dipole configurations. Early work in thermal therapy in the hyperthermia field eventually led to utilisation of these antennas and methods for MW ablation of tumours. Efforts to boost the radiated MW power levels while decreasing antenna shaft temperatures led to incorporation of internally cooled antennas for ablation. To address larger tumours, MW treatment utilised arrays that were simultaneously activated by either non-synchronous or synchronous phase operation, benefiting both hyperthermia and ablation strategies. Numerical modelling was used to provide treatment planning guidance for hyperthermia treatments and is expected to provide a similar benefit for ablation therapy. Although this is primarily a review paper, some new data are included. These new data show that three antennas with 2.5 cm spacing at 45 W/channel and 10 min resulted in a volume of 89.8 cm(3) when operated synchronously, but only 53.4 cm(3) non-synchronously. Efficiency was 1.1 (synchronous) versus 0.7 (non-synchronous). MW systems, treatment planning, and image guidance continue to evolve to provide better tools and options for clinicians and patients in order to provide better approach and targeting optimisation with the goal of improved treatment for the patient.

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“…The microwave power is set as 60W and the heating time is 5 minutes. And the velocity of the cooling water is 0.22 m/s [10].…”

Section: Methodsmentioning

confidence: 99%

“…The properties [10] of ex-vivo liver are shown in Table 2. Besides, the model is set as 37 at initial condition on the principle of Dirichlet boundary condition.…”

Section: Methodsmentioning

confidence: 99%

Numerical study of the effect of blood vessel on the microwave ablation shape

Nie

Nan

Guo

et al. 2015

BME

Self Cite

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Abstract. The existence of large blood vessels seriously impacts the results of microwave ablation on heat transfer of surrounding tissue, and the research of influences about large blood vessels could be essential and significant. The temperature distribution in the tissue was analyzed with a microwave heating source by finite element method. The model, where the blood vessel is parallel to antenna, has different distances from antenna to blood vessel. As distance was greater than 20mm, the effect of blood vessel that was parallel to antenna was ignored and the ablation area was elliptical-like. When distance was less than 10mm, the part of asymmetrical coagulated area was on the right side of blood vessel. Therefore, the temperature contour by different conditions could provide numerical references, which is whether to block blood vessel or not, to achieve the aim of guiding the clinical practice, according to the locations of tumor and blood vessel.

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Numerical study on thermal field of microwave ablation with water-cooled antenna

Cited by 24 publications

References 7 publications

Characterisation of tissue shrinkage during microwave thermal ablation

Characterisation of tissue shrinkage during microwave thermal ablation

Interstitial microwave transition from hyperthermia to ablation: Historical perspectives and current trends in thermal therapy

Numerical study of the effect of blood vessel on the microwave ablation shape

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