Table 2. Expected results logged in the BoneJ result table comparing BoneJ2 and BoneJ1 output.
Due to the stochastic nature of sampling both degree of anisotropy (DA) and ellipsoid factor (EF) vary between runs in an image- and setting-specific manner. Modern Anisotropy and Ellipsoid Factor 16 plugins differ in implementation from those in BoneJ1, so some minor variation in output is expected. Users are strongly encouraged to run sensitivity analyses. to select settings for Anisotropy and Ellipsoid Factor (as we have done) 16 that produce a stable result on their images. Note that Thickness, Volume Fraction and Connectivity are direct ports from BoneJ1 to BoneJ2 and have no stochastic character, so their results are expected to be invariant for the same input image. BoneJ2’s Purify uses Particle Analyser’s improved ConnectedComponents code 19 and completes in ~ 1 s compared to ~ 15 s in BoneJ1.
| Image | BoneJ2
( styloid-r11) |
BoneJ 1.4.3 |
|---|---|---|
| DA | 0.51675 | 0.56665 |
| BV (mm 3) | 25.92792 | 25.92792 |
| TV (mm 3) | 62.21983 | 62.21983 |
| BV/TV | 0.41671 | 0.41671 |
| Tb.Th Mean (mm) | 0.21246 | 0.21246 |
| Tb.Th Std. Dev. (mm) | 0.06347 | 0.06347 |
| Tb.Th Max (mm) | 0.43277 | 0.43277 |
| Tb.Sp Mean (mm) | 0.47014 | 0.47014 |
| Tb.Sp Std. Dev. (mm) | 0.14888 | 0.14888 |
| Tb.Sp Max (mm) | 0.96242 | 0.96242 |
| Median EF | -0.14632 | NaN (mean, -0.21451) |
| Max EF | 0.91779 | 0.91695 |
| Min EF | -0.84867 | -0.93064 |
| Euler char (χ) | -291 | -291 |
| Corr. Euler (χ – Δχ) | -238.375 | -238.375 |
| Connectivity | 239.375 | 239.375 |
| Conn.D (mm 3) | 3.84725 | 3.84725 |