Article

Computed tomography (CT) is currently the reference standard for
measuring femoral and tibial rotational alignment. The EOS System is a new
biplanar low-dose radiographic device that allows 3-dimensional lower-limb
modelling with automated measurements of femoral and tibial rotational alignment
(torsion). HYPOTHESIS: Femoral and tibial torsion measurements provided by the
EOS System are equivalent to those obtained using CT. METHODS: In a
retrospective analysis of 43 lower limbs in 30 patients, three senior
radiologists measured femoral and tibial torsion on both CT and EOS images.
Agreement between CT and EOS values was assessed by computing Pearson's
correlation coefficient and interobserver reproducibility by computing the
intraclass correlation coefficient (ICC). RESULTS: Femoral torsion was 13.4
degrees by EOS vs. 13.7 degrees by CT (P=0.5) and tibial torsion was 30.8 degrees
by EOS vs. 30.3 degrees by CT (P=0.4). Strong associations were found between EOS
and CT values for both femoral torsion (P=0.93) and tibial torsion (P=0.89). With
EOS, the ICC was 0.93 for femoral torsion and 0.86 for tibial torsion;
corresponding values with CT were 0.90 and 0.92. DISCUSSION: The EOS system is a
valid alternative to CT for lower-limb torsion measurement. EOS imaging allows a
comprehensive evaluation in all three planes while substantially decreasing
patient radiation exposure. LEVEL OF EVIDENCE: Level III, case-control.
CI - Copyright (c) 2013. Published by Elsevier Masson SAS.

Langue : FRANCAIS