Assessment of two-dimensional (2D) and three-dimensional (3D) lower limb measurements in adults: Comparison of micro-dose and low-dose biplanar radiographs

Rosskopf, Andrea B.; Pfirrmann, Christian W. A.; Buck, Florian M.

doi:10.1007/s00330-015-4166-5

Cited by 9 publications

(4 citation statements)

References 26 publications

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“…Furthermore, the time required for biplanar radiograph-based 3D reconstruction remains inferior to that required for an accurate pelvis 3D reconstruction from the segmentation of a full set of CT-scan images. Moreover, current studies focusing on the reduction of the radiation dose (from low-dose to micro-dose) are encouraging [44]. This will allow more regular patient examination for follow-up.…”

Section: Discussionmentioning

confidence: 95%

Influence of patient axial malpositioning on the trueness and precision of pelvic parameters obtained from 3D reconstructions based on biplanar radiographs

et al. 2016

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• Pelvic radiological parameters could be affected by patient malpositioning. • Biplanar radiograph-based 3D reconstructions were performed at increments of axial rotation. • Trueness, precision and global uncertainty were evaluated for pelvic and hip radiological parameters. • Hip parameters were less affected by rotation compared to pelvic parameters. • Maintaining the pelvis close to the neutral position is recommended to ensure the highest possible accuracy.

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Section: Discussionmentioning

confidence: 95%

Influence of patient axial malpositioning on the trueness and precision of pelvic parameters obtained from 3D reconstructions based on biplanar radiographs

et al. 2016

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“…A full-length radiograph of the lower limbs was acquired for each subject using a low-dosage biplanar EOS system (EOS Imaging Inc., France) ( Folinais et al, 2013 ). An effective radiation dose lower than 0.63 mSv guaranteed minimal risks to the participants ( Mettler et al, 2008 ; Buck et al, 2012 ; Rosskopf et al, 2016 ). Femoral torsion was assessed on 3D reconstructions of the femur, utilizing the biplanar EOS radiographs (sterEOS software, EOS Imaging Inc., France) ( Buck et al, 2012 ).…”

Section: Methodsmentioning

confidence: 99%

Subject-Specific Modeling of Femoral Torsion Influences the Prediction of Hip Loading During Gait in Asymptomatic Adults

Pieri

Friesenbichler

List

et al. 2021

Front. Bioeng. Biotechnol.

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Hip osteoarthritis may be caused by increased or abnormal intra-articular forces, which are known to be related to structural articular cartilage damage. Femoral torsional deformities have previously been correlated with hip pain and labral damage, and they may contribute to the onset of hip osteoarthritis by exacerbating the effects of existing pathoanatomies, such as cam and pincer morphologies. A comprehensive understanding of the influence of femoral morphotypes on hip joint loading requires subject-specific morphometric and biomechanical data on the movement characteristics of individuals exhibiting varying degrees of femoral torsion. The aim of this study was to evaluate hip kinematics and kinetics as well as muscle and joint loads during gait in a group of adult subjects presenting a heterogeneous range of femoral torsion by means of personalized musculoskeletal models. Thirty-seven healthy volunteers underwent a 3D gait analysis at a self-selected walking speed. Femoral torsion was evaluated with low-dosage biplanar radiography. The collected motion capture data were used as input for an inverse dynamics analysis. Personalized musculoskeletal models were created by including femoral geometries that matched each subject’s radiographically measured femoral torsion. Correlations between femoral torsion and hip kinematics and kinetics, hip contact forces (HCFs), and muscle forces were analyzed. Within the investigated cohort, higher femoral antetorsion led to significantly higher anteromedial HCFs during gait (medial during loaded stance phase and anterior during swing phase). Most of the loads during gait are transmitted through the anterior/superolateral quadrant of the acetabulum. Correlations with hip kinematics and muscle forces were also observed. Femoral antetorsion, through altered kinematic strategies and different muscle activations and forces, may therefore lead to altered joint mechanics and pose a risk for articular damage. The method proposed in this study, which accounts for both morphological and kinematic characteristics, might help in identifying in a clinical setting patients who, as a consequence of altered femoral torsional alignment, present more severe functional impairments and altered joint mechanics and are therefore at a higher risk for cartilage damage and early onset of hip osteoarthritis.

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“…Biplanar radiography can calculate 3D patient information from two simultaneous frontal and lateral radiographs of a standing patient without stitching or vertical distortion and has been shown to be more reliable than conventional 2D radiographs for lower extremity measurements [11]. Previous studies have validated biplanar imaging for 3D reconstruction of lower limbs in adults and children [2, 3, 10, 25, 29, 30]. However, only one study has reported on the accuracy of biplanar radiography for measurement of THA implant position [14].…”

Section: Introductionmentioning

confidence: 99%

Biplanar Low-Dose Radiography is Accurate for Measuring Combined Anteversion after Total Hip Arthroplasty

Esposito

Miller

Lipman

et al. 2020

HSS Journal®: The Musculoskeletal Journal of Hospital for Speci

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Background Acetabular component position alone has not been predictive of stability after total hip arthroplasty (THA). Combined anteversion of the acetabulum and femur has the potential of being more predictive of stability. Unfortunately, femoral component position is difficult to measure on plain radiographs. Computed tomography (CT) is the gold standard for measuring implant position post-operatively, but CT exposes patients to a substantial amount of radiation. Questions/Purposes We sought to determine whether biplanar low-dose radiography can be used to accurately measure both acetabular and femoral implant position after THA. Methods Twenty patients underwent standing low-dose biplanar spine-to-ankle radiographs and supine CT scans 6 weeks after THA. Measurements of acetabular inclination, acetabular anteversion, and femoral anteversion were performed by two blinded observers and compared. Results The average absolute differences between biplanar radiographs and CT scans were 2° ± 2° for acetabular inclination, 3° ± 2° for acetabular anteversion, and 4° ± 4° for femoral anteversion between EOS measurements and CT measurements. Interobserver agreement was good for acetabular inclination, acetabular anteversion, and femoral anteversion (Cronbach's α = 0.90) using biplanar low-dose imaging. Conclusion Biplanar radiography is a reliable low-radiation alternative for measuring acetabular inclination, acetabular anteversion, femoral version, and thus combined anteversion compared to CT. Femoral anteversion had the most variability but is still clinically relevant.

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Assessment of two-dimensional (2D) and three-dimensional (3D) lower limb measurements in adults: Comparison of micro-dose and low-dose biplanar radiographs

Abstract: • Lower limb length and mechanical axis can be reliably measured with micro-dose. • Femoral and tibial torsion can be reliably assessed with micro-dose. • Micro-dose allows a huge reduction of radiation exposure.

Cited by 9 publications

References 26 publications

Influence of patient axial malpositioning on the trueness and precision of pelvic parameters obtained from 3D reconstructions based on biplanar radiographs

Influence of patient axial malpositioning on the trueness and precision of pelvic parameters obtained from 3D reconstructions based on biplanar radiographs

Subject-Specific Modeling of Femoral Torsion Influences the Prediction of Hip Loading During Gait in Asymptomatic Adults

Biplanar Low-Dose Radiography is Accurate for Measuring Combined Anteversion after Total Hip Arthroplasty

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