From: Measurement error and reliability of three available 3D superimposition methods in growing patients
Superimposition methods | |||
---|---|---|---|
Features | CMFreg/Slicer | Dolphin | Landmark-derived |
Processing Time | Up to 3 h from segmentation to color-coded maps. Cranial base registration itself takes from 5 to 60 min | Up to 50 min if numerical assessment and color–coded maps for visual evaluation are required. Cranial base registration itself takes about10 minutes, but it often fails, requiring repetition, which increasing time | Up to 35 min from landmarking to numerical assessment. Approximately 15 min for landmarking only. Numerical assessment requires another 15–20 min |
Complexity | Highly complex for a naïve user. Multiple steps and two different software programs are used throughout the process | Easy to use but utilizes a volume cube for reference not only stable structures. 3D surfaces visual and quantitative evaluations after registration steps require similar steps to CMFreg/Slicer and need to be followed using Slicer and ITK-Snap software programs | Easy to use. Only landmark placement is required |
Convenience/Access | Open-source software programs. 3D Slicer and ITK-Snap | License required | License required |
Visual Assessment | Superimposition of surface models and color-coded maps for more thorough visual evaluation | Superimposition of surface models and color-coded maps using other software for more thorough visual evaluation | Not available |
Reliability | Excellent reliability | Excellent reliability | Good reliability |
Measurement Error | Less than 0.7 mm | Less than 0.4 mm | Less than 1.2 mm when assessed reliability. However, there was a magnified error when compared to the voxel-based methods |
Accuracy | No gold standard available | No gold standard available | No gold standard available |