Reproducibility Test
To assess inter-observer variability, two experienced ultrasound examiners analyzed S and Sr parameters for 39 RWMA segments in 6 randomly selected subjects, resulting in an inter-observer variability of 5.3%. Intra-observer variability was assessed by having the same ultrasound examiner analyze S and Sr parameters for 50 RWMA segments in 8 randomly selected subjects, resulting in an intra-observer variability of 4.9%. These findings indicate good reproducibility of the STE measurements.