Table 3 Measured viscoelastic parameters from the two-layer viscoelastic model (1–20 kHz)

Axial, intima-media

α (kPa)

40 ± 10

43 ± 0.2

51 ± 0.1

60 ± 0.4

66 ± 0.3

2β+2γ (kPa)

300 ± 140

330 ± 40

480 ± 10

720 ± 70

1000 ± 5

Axial, adventitia

α (kPa)

32 ± 15

60 ± 14

110 ± 10

200 ± 26

310 ± 2

2β+2γ (kPa)

270 ± 140

340 ± 270

930 ± 60

2020 ± 370

3500 ± 250

Axial (media & adventitia)

η (×10⁻³s^δ)

10 ± 6

25 ± 0.5

25 ± 1

20 ± 2.6

9 ± 3

δ

0.45 ± 0.06

0.36 ± 0.10

0.25 ± 0.06

0.15 ± 0.03

0.09 ± 0.02

Circum., intima-media

α (kPa)

43 ± 11

55 ± 9

67 ± 0.2

81 ± 4

99 ± 0.1

2β+2γ (kPa)

390 ± 90

600 ± 100

1030 ± 26

-

-

Circum., adventitia

α (kPa)

32 ± 11

110 ± 40

220 ± 10

325 ± 20

48 ± 1

2β+2γ (kPa)

250 ± 76

880 ± 520

3450 ± 200

-

-

Circum. (media & adventitia)

η (×10⁻³s^δ)

15 ± 2

21 ± 4

25 ± 0.2

15 ± 0.2

1.3 ± 0.1

δ

0.46 ± 0.06

0.30 ± 0.05

0.17 ± 0.02

0.21 ± 0.03

0.05 ± 0.03