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Table 2 Phantom Accuracy

From: Sternal instability measured with radiostereometric analysis. A study of method feasibility, accuracy and precision

Phantom Position / Axes X axis (sternal separation)
Mean (SD)
Y axis (proximal-distal translation)
Mean (SD)
Z axis (anterior-posterior translation)
Mean (SD)
Neutral
 Separation 0–1 mm 0.52 (0.35) −0.11 (0.16) −0.53 (0.52)
 Separation 1–2 mm 1.05 (0.1) −0.36 (0.14) 0.04 (0.12)
 Separation 2–3 mm 1.06 (0.13) −0.41 (0.15) −0.29 (0.22)
Mean neutral 0.88 (0.25) 0.29(0.13) −0.26 (0.23)
15° Cranial tilt
 Separation 0–1 mm 0.54 (0.34) −0.03 (0.16) −0.65 (0.32)
 Separation 1–2 mm 1.09 (0.08) −0.35 (0.07) −0.06 (0.18)
 Separation 2–3 mm 1.05 (0.1) −0.35 (0.23) −0.44 (0.77)
Mean 15° cranial tilt 0.89 (0.25) −0.24 (0.15) −0.38 (0.24)
15° Caudal tilt
 Separation 0–1 mm 0.52 (0.31) 0.19 (0.15) −0.46 (0.43)
 Separation 1–2 mm 1.04 (0.07) 0.37 (0.12) −0.01 (0.16)
 Separation 2–3 mm 1.03 (0.11) 0.44 (0.07) −0.17 (0.37)
Mean 15° caudal tilt 0.86 (0.24) 0.33 (0.11) −0.21 (0.19)
  1. The measured difference in means with standard deviations of an approximated 1 mm x-axis phantom migration on the custom made jig. N = 4