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Table 3 Modeling Results for Constant and Temperature-Dependent conductivity with Tissue Perfusion

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

Volts (V)

E(P) (V/m)

J(P) (A/m3)

T(P) (°C)

HF(P) (W/m3)

σ (P) (S/m)

SAR(P) (W/kg)

E(R) (V/m)

J(R) (A/m3)

T(R) (°C)

HF(R) (W/m3)

σ (R) (S/m)

SAR(R) (W/kg)

0.0

0

0

37

0

0.143

0.0

0

0

37

0

0.143

0

2.5

2646

378

37

144

0.143

9.4 × 102

2646

384

37

122

0.145

9.6 × 102

5.0

5291

757

39

436

0.143

3.8 × 103

5281

776

39

476

0.147

3.9 × 103

7.5

7937

1135

40

1012

0.143

8.5 × 103

7901

1203

40

1080

0.152

9.0 × 103

10.0

10583

1513

44

1842

0.143

1.5 × 104

10752

1680

44

1940

0.156

1.7 × 104

12.5

13228

1892

49

2843

0.143

2.4 × 104

13063

2228

49

3073

0.171

2.7 × 104

15.0

15874

2270

54

4142

0.143

3.4 × 104

15590

2877

54

4498

0.185

4.2 × 104

17.5

18519

2648

62

5624

0.143

4.6 × 104

18072

3662

62

6241

0.203

6.2 × 104

20.0

21165

3027

70

7498

0.143

6.0 × 104

20502

4629

71

8333

0.226

9.0 × 104

22.5

23811

3405

78

9505

0.143

7.7 × 104

22874

5844

82

10811

0.255

1.3 × 105

25.0

26456

3783

88

11455

0.143

9.4 × 104

25182

7384

94

13717

0.293

1.8 × 105

27.5

29102

4162

96

14199

0.143

1.1 × 105

27422

9360

104

17103

0.341

2.4 × 105

  1. Modeling results using constant (P) and temperature-dependent (R) 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 is ω = 6.4 × 10-3 1/s.