Fig 1.
Concurrent UDS and UBV measurement setup for studying bladder compliance.
Fig 2.
Bladder cavity and detrusor layer (inferior layer) as seen in the B-mode ultrasound image.
Fig 3.
(a) Spatial-temporal map of the bladder wall motion in response to acoustic radiation force. Dotted lines represent the least square regression for group velocity calculation. The color shows the amplitude of the particle velocity in mm/s. (b) Phase velocity dispersion curve from the two-dimensional Fourier analysis of the displacement data and Lamb wave fit for calculation of the elasticity.
Fig 4.
(a) Distribution of cystometric volume in 70 patients.
Fig 5.
(a) From left to right: detrusor pressure, estimated group velocity squared and shear elasticty in a noncompliant patient (compliance < 18.75). (b) from left to right: detrusor pressure, estimated group velocity squared and shear elasticity in a compliant patient (compliance > 62.5)
Fig 6.
Distribution of Pearson correlation between different parameters of UBV and UDS detrusor pressure (Pdet).
For each group the width of the notches show the 95% confidence interval and data points with different markers present outliers in each group.
Table 1.
Summary of the statistical analysis of correlation between UBV and UDS.