Table 1. Measurement differences between original CT, STL file and CT of 3D printed model.
| Landmarks/comparisons | Differences (%) in measurements by Observer 1/Observer 2 | |||||||
|---|---|---|---|---|---|---|---|---|
| STL file compared to original CT | CT of 3D printed model compared to original CT | STL file compared to CT of 3D printed model | ||||||
| LR | AP | LR | AP | LR | AP | |||
| Common hepatic duct | 19.6 [7]/23.8 [4] | 6.0 [2]/6.5 [2] | 15.2 [3]/18.3 [3] | 9.4 [3]/7.6 [2] | 3.8 [6]/4.7 [6] | 3.8 [7]/1.3 [2] | ||
| Right hepatic duct | 23.4 [1]/23.2 [2] | 19.1 [7]/18.9 [11] | 24 [1]/22.9 [2] | 28.8 [1]/30.9 [2] | 0.80 [3]/0.16 [1] | 13.6 [4]/17.3 [8] | ||
| Left hepatic duct | 22.2 [3]/21.8 [1] | 16.9 [5]/13.1 [4] | 23.7 [6]/19.0 [6] | 21.4 [1]/13.7 [3] | 2.0 [3]/3.5 [1] | 5.9 [2]/0.7 [2] | ||
| Biliary cyst | 3.2 [2]/3.8 [3] | 2.6 [3]/0.5 [1] | 4.4 [3]/3.9 [4] | 0.7 [1]/0.2 [1] | 1.2 [1]/0.1 [1] | 1.8 [1]/0.7 [1] | ||
Numbers in the brackets indicate standard deviation. LR, left to right dimension; AP, anterior to posterior dimension; STL, standard tessellation language; CT, computed tomography.