250
10 Characterization of Atherosclerotic Lesions by Inversion of Eddy-. . .
Coil
Blood
Vessel Wall
Lipid Core
Smooth Muscle
Fibrous Tissue
Calcium
: σ = 0.70
: σ = 0.58
: σ = 0.025
: σ = 0.40
: σ = 0.24
: σ = 0.08
Fig. 10.1 A planar model of a type Vb atherosclerotic lesion, showing the pancake Eddy-current
coil for taking impedance data and the conductivities of the various media
Conductivity
Depth
0.70
0.58
0.40
0.24
0.08
0.025
Blood
Vessel
Wall
Smooth
Muscle
Fibrous
Tissue
Calcium
Lipid Core
L 1
L
2
L 3
L
4
L
5
Fig. 10.2 Standard conductivity model of a type Vb lesion