Finite Element Analysis of Hepatic Radiofrequency Ablation Probes using Temperature-Dependent Electrical Conductivity

Table 2 Modeling Results for Constant and Temperature-Dependent conductivity without Tissue Perfusion

Volts (V)	E(C) (V/m)	J(C) (A/m³)	T(C) (°C)	HF(C) (W/m³)	σ (C) (S/m)	SAR(C) (W/kg)	E(D) (V/m)	J(D) (A/m³)	T(D) (°C)	HF(D) (W/m³)	σ (D) (S/m)	SAR(D) (W/kg)
0.0	0	0	37	0	0.143	0.0	0	0	37	0	0.143	0
2.5	2646	378	38	122	0.143	9.4 × 10²	2644	384	38	123	0.145	9.6 × 10²
5.0	5291	757	41	489	0.143	3.8 × 10³	5280	801	41	493	0.152	4.0 × 10³
7.5	7937	1135	45	1100	0.143	8.5 × 10³	7900	1288	45	1118	0.163	9.6 × 10³
10.0	10583	1513	51	1956	0.143	1.5 × 10⁴	10495	1886	52	2011	0.180	1.9 × 10⁴
12.5	13228	1892	59	3056	0.143	2.4 × 10⁴	13059	2648	60	3186	0.203	3.3 × 10⁴
15.0	15874	2270	69	4401	0.143	3.4 × 10⁴	15583	3638	71	4667	0.233	5.3 × 10⁴
17.5	18519	2640	80	5990	0.143	4.6 × 10⁴	18062	4941	84	6482	0.274	8.4 × 10⁴
20.0	21165	3027	94	7824	0.143	6.0 × 10⁴	20487	6666	99	8663	0.325	1.3 × 10⁵

Modeling results using constant (C) and temperature-dependent (D) conductivity at the point of maximum electrical field (E), current density (J), temperature(T), and heat flux (HF), electrical conductivity (σ) and the specific absorption rate (SAR). This model assumes that the perfusion coefficient ω = 0.

ISSN: 1475-925X