Phantom experimental study on microwave ablation with a water-cooled antenna

Figures & data

Figure 1. Structure of the antenna and water circulation.

Table I.  Properties of phantom.

ε	σ (s/m)	ρ (kg/m^3)	c (J/kg°C)	K (W/m°C)
45	2.2	1070	3700	0.535

ε: Dielectric constant. σ: Electrical conductivity. ρ: Density of the phantom. c: Specific heat. K: Thermal conductivity

Figure 2. Phantom experimental system.

Figure 3. Antenna and TCs placed in the phantom.

Figure 4. Temperature curves of TCs near MW radiator at 60 W with different cooling water velocities. (a) TCs 3, (b) TCs 4, (c) TCs 5, (d) TCs 12.

Figure 5. Heating pattern (54°C contours) at 60 W with a cooling water velocity of 0.44 m/s at different times.

Figure 6. Temperature distribution (54°C contours) at 60 W after (a) 60 s and (b) 120 s.

Figure 7. The evaluation of SAR for third, fourth, fifth, twelfth TCs at 60 W and cooling water velocity for 0 m/s.

Figure 8. SAR distribution at 60 W power.

Table II.  Fitted coefficients of Equation 3.

a	b	c	d	e
14.23	0.05	0.19	−0.28	0.53