Comparison of 3D bone models of the knee joint derived from CT and 3T MR imaging

Neubert, Aleš, Wilson, Katharine J., Engstrom, Craig, Surowiec, Rachel K., Paproki, Anthony, Johnson, Nicholas, Crozier, Stuart, Fripp, Jurgen and Ho, Charles P. (2017) Comparison of 3D bone models of the knee joint derived from CT and 3T MR imaging. European Journal of Radiology, 93 178-184. doi:10.1016/j.ejrad.2017.05.042

Author Neubert, Aleš
Wilson, Katharine J.
Engstrom, Craig
Surowiec, Rachel K.
Paproki, Anthony
Johnson, Nicholas
Crozier, Stuart
Fripp, Jurgen
Ho, Charles P.
Title Comparison of 3D bone models of the knee joint derived from CT and 3T MR imaging
Journal name European Journal of Radiology   Check publisher's open access policy
ISSN 1872-7727
Publication date 2017-08-01
Sub-type Article (original research)
DOI 10.1016/j.ejrad.2017.05.042
Open Access Status Not yet assessed
Volume 93
Start page 178
End page 184
Total pages 7
Place of publication E Park, Shannon, Clare Ireland
Publisher Elsevier Ireland
Language eng
Formatted abstract
Purpose: To examine whether magnetic resonance (MR) imaging can offer a viable alternative to computed tomography (CT) based 3D bone modeling.

Methods: CT and MR (SPACE, TrueFISP, VIBE) images were acquired from the left knee joint of a fresh-frozen cadaver. The distal femur, proximal tibia, proximal fibula and patella were manually segmented from the MR and CT examinations. The MR bone models obtained from manual segmentations of all three sequences were compared to CT models using a similarity measure based on absolute mesh differences.

Results: The average absolute distance between the CT and the various MR-based bone models were all below 1 mm across all bones. The VIBE sequence provided the best agreement with the CT model, followed by the SPACE, then the TrueFISP data. The most notable difference was for the proximal tibia (VIBE 0.45 mm, SPACE 0.82 mm, TrueFISP 0.83 mm).

Conclusions: The study indicates that 3D MR bone models may offer a feasible alternative to traditional CT-based modeling. A single radiological examination using the MR imaging would allow simultaneous assessment of both bones and soft-tissues, providing anatomically comprehensive joint models for clinical evaluation, without the ionizing radiation of CT imaging.
Keyword 3D bone modeling
Computed tomography
FOV − field of view
FROI − focused region of interest
Magnetic resonance imaging
MR − magnetic resonance
Patient specific templatesCT − computed tomography
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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