Interlaboratory comparison of femur surface reconstruction from CT data compared to reference optical 3D scan

Ehsan Soodmand*, Daniel Kluess, Patrick A. Varady, Robert Cichon, Michael Schwarze, Dominic Gehweiler, Frank Niemeyer, Dieter Pahr, Matthias Woiczinski

*Corresponding author for this work

Research output: Journal article (peer-reviewed)Journal article

28 Citations (Scopus)


Background: The present study contrasts the accuracy of different reconstructed models with distinctive segmentation methods performed by various experts. Seven research groups reconstructed nine 3D models of one human femur based on an acquired CT image using their own computational methods. As a reference model for accuracy assessment, a 3D surface scan of the human femur was created using an optical measuring system. Prior to comparison, the femur was divided into four areas; "neck and greater trochanter", "proximal metaphysis", "diaphysis", and "distal metaphysis". The deviation analysis was carried out in GEOMAGIC studio v.2013 software. Results: The results revealed that the highest deviation errors occurred in "neck and greater trochanter" area and "proximal metaphysis" area with RMSE of 0.84 and 0.83mm respectively. Conclusion: In conclusion, this study shows that the average deviation of reconstructed models prepared by experts with various methods, skills and software from the surface 3D scan is lower than 0.79 mm, which is not a significant discrepancy.

Original languageEnglish
Article number29
JournalBioMedical Engineering Online
Issue number1
Publication statusPublished - 02 Mar 2018
Externally publishedYes


  • Accuracy assessment
  • Bone segmentation
  • Deviation analysis
  • Image-based model
  • Medical imaging
  • Round robin test
  • Shape reconstruction

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Biomaterials
  • Biomedical Engineering
  • Radiology, Nuclear Medicine and Imaging


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