[Ultrasonography and computerized tomography in the determination of the femoral angle of anteversion. Experimental and clinical comparative study].
A comparative study of the femoral neck anteversion angle as determined by ultrasonography and CT was conducted on 40 unpaired dry bone specimens and 5 normal subjects. Since ultrasound cannot penetrate bone, the anterior surface femoral neck orientation was determined and correlated well (r = 0,95) with the corresponding measurements as imaged by CT. However, a weaker correlation (= 0,76) existed between it and the true femoral neck axis, as measured on CT display. The latter is a function of the posterior surface femoral neck orientation as well, since the two femoral surface are rarely parallel, but converge at the femoral shaft. It is concluded that the ultrasonographic modality will overestimate the true femoral neck anteversion beyond the 5-degree error acceptable for clinical purposes.
D005269:Femur / Q000473:pathology*; D006801:Humans; D008433:Mathematics; D014057:Tomography, X-Ray Computed; D014465:Ultrasonics
Ultrasonografia e TC nella determinazione dell'angolo di antiversione femorale. Studio comparativo sperimentale e clinico.