Biomedical Engineering Reference
In-Depth Information
Microwave catheter
Perfusion chamber
Microwave
generator
Roller
pump
Muscle
equivalent
phantom
Fiberoptic
thermometry
Heater coil
Saline bath
(a)
60
50
40
30
20
RF 4 mm
RF 8 mm
MW
10
0
0
20
40
60
80
100
120
140
160
Power (W)
(b)
FIGURE 6.15
(
a
) Diagram of flow phantom model for evaluation of cardiac ablation
catheters. The catheter to be evaluated is placed on the surface of the phantom, which
is immersed in a perfusion chanber. Cardiac output is simulated by perfusing saline
across the surface of the phantom by means of a roller pump. (
b
) Dosimetry of power
versus temperature for RF and microwave catheters. The maximal change in temper-
ature is at the surface, near the tip for RF catheters and at the base for the microwave
catheter [90].
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