Figure 2From: Screening for low bone mass with quantitative ultrasonography in a community without dual-energy X-ray absorptiometry: population-based survey Bland-Altman plot used to examine minor systematic differences between the two QUS machines. Mean difference between the machines (QUS_II_1, QUS_II_2) was -3.56 ± 6.39 (standard deviation [SD]) dB/MHz.Back to article page