Observational Study
Copyright ©The Author(s) 2020.
World J Gastroenterol. Sep 14, 2020; 26(34): 5169-5180
Published online Sep 14, 2020. doi: 10.3748/wjg.v26.i34.5169
Table 1 Relationship between Young's Modulus and different densities of polyvinyl alcohol phantoms
Molecular weightConcentrationρ (g/cm3)1M. Y (KPa)1
MW1 = 85000-124000C1 = 7%0.84 ± 0.11380 ± 0.63
C2 = 9%0.92 ± 0.07518 ± 0.50
C3 = 12%0.96 ± 0.13780 ± 0.28
C4 =15%1.43 ± 0.63910 ± 0.23
C5 = 20%1.46 ± 0.181050 ± 0.20
MW2 = 146000-186000C6 = 7%0.91 ± 0.08395 ± 0.23
C7 = 9%0.97 ± 0.11525 ± 0.20
C8 = 12%1.22 ± 0.24798 ± 0.18
C9 = 15%1.46 ± 0.22922 ± 0.13
C10 = 20%2.08 ± 0.501120 ± 0.10
Table 2 Strain ratios (B/A) and regions of interest: A and B
Strain ratios (B/A)
ABCDE
0.193.3230.040.12
A 0.810.10.20.410.13
B 0.010.90.420.020.02
FGHIJ
30.1869.6734.5254.37.0
A 0.050.020.030.010.04
B 1.571.641.052.330.3