Figure 3 | Scientific Reports

Figure 3

From: 3D free-hand ultrasound to register anatomical landmarks at the pelvis and localize the hip joint center in lean and obese individuals

Figure 3

Euclidean distances of the anterior superior iliac spine (ASIS) and the hip joint center (HJC) location between the test and the retest plotted against the fat mass of the torso in % body mass. The first three plots show the methods, manual marker placement (MMP), instrumented pointer technique (IPT), and 3D free-hand ultrasound (3DFUS) to determine the ASIS positions. The fourth plot shows the 3DFUS-based HJC location. The solid line represents the line of best fit. The dashed lines show the 95% confidence intervals. Pearson’s r, the p values, and the number of included data points are shown for each plot. Note that 11 trials (legs) from the obese and two trials (legs) from the lean group had to be removed for 3DFUS-HJC due to problems with image quality and a technical problem, respectively.

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