Combined magnetic resonance imaging approach for the assessment of in vivo knee joint kinematics under full weight-bearing conditions

Hares, G Al; Eschweiler, Jörg; Radermacher, Klaus

doi:10.1177/0954411915585863

Cited by 7 publications

(3 citation statements)

References 46 publications

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“…The gold standard for 3D imaging of bone is computed tomography (CT), which however is associated with additional radiation and high costs. Alternative approaches proposed for 3D reconstructions of bone are MRI image based [7] or based on bi-planar x-ray imaging with model based reconstructions [8,9]. These approaches are associated with high costs, too, or show limited accuracy in specific clinical applications.…”

Section: Introductionmentioning

confidence: 99%

Augmented Active Shape Model Search – towards 3D Ultrasound-based Bone Surface Reconstruction

Hohlmann¹,

Radermacher²

EPiC Series in Health Sciences

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Patient-specific instrumentation in total knee arthroplasty (TKA), among other medical indications, requires a three-dimensional model of the bones involved. Currently, these are typically segmented from computer tomography images. Ultrasound offers a cheap as well as radiation-less imaging alternative, but suffers from a low signal-to-noise ratio as well as several other image artifacts. The interleaved partial active shape models search (IPASM) adapts a general physiological model to a set of images of a single patient, but suffers from false correspondences being soft tissue interfaces that are interpreted as bone surface. In order to counter this problem, a convolutional neural network (CNN) is applied to preprocess ultrasound images into bone confidence maps. This reduces the average surface distance error in an in-vivo evaluation by 0.7 to 1.3 mm.

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Section: Introductionmentioning

confidence: 99%

Augmented Active Shape Model Search – towards 3D Ultrasound-based Bone Surface Reconstruction

Hohlmann¹,

Radermacher²

EPiC Series in Health Sciences

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“…Considering that this technique exposes the subject to a high level of radiation, an alternative has been proposed taking advantage of magnetic resonance imaging (MRI) to visualize bones during sequential knee joint motion. To overcome the drawback of the lying position, some loading apparatus have been developed [14][15][16] and a protocol combining supine and upright MRI data [17] has recently been proposed. However, the technic suffers from several drawbacks: the acquisition time is long, the confine environment makes it difficult to reproduce realistic weight-bearing on the lower limbs, the restricted field of view limits the available information and the image processing remains time consuming [18].…”

Section: Introductionmentioning

confidence: 99%

3D Sequential Kinematics of the Femoro-Tibial Joint of Normal Knee from Multiple Bi-planar X-rays: Accuracy and Repeatability

Langlois

Pillet

Lavaste

et al. 2018

IRBM

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Highlights• The EOS system allows the sequential kinematic analysis of the femoro-tibial joint. • The reliability of the registration of 3D model on 2D views has been quantified. • The accuracy of the registration is inferior to 1.6 mm and 0.4 • . • The repeatability of the registration is 0.3 • , 2.1 • and 1.6 • , for the rotations. • The repeatability of the registration is inferior to 1.8 mm for the translations. Graphical abstract AbstractBackground: Several methods can be used to assess joint kinematics going from optoelectronic motion analysis to biplanar fluoroscopy. The aim of the present work was to evaluate the reliability of the use of biplane radiography to quantify the sequential 3D kinematics of the femoro-tibial joint.Methods: Bi-planar X-rays (EOS imaging) of 12 lower limbs (6 specimens in vitro and 6 subjects in vivo) were taken for various knee flexion angles. 3D personalized models of the femur and the tibia were registered on each pair of views. To quantify the bias, the kinematic parameters calculated from the registered models were compared to those obtained from the tripods embedded in the specimens. Intra and inter-operator repeatability of each parameter were assessed from the registrations made by 3 operators in vivo.Results: In vitro, the bias of the tibia pose estimation obtained from the registration method was inferior to 1.6 mm and 0.4 • . In vivo, the repeatability of the sequential kinematic parameters was inferior to 0.3 • , 2.1 • and 1.8 • , for respectively flexion, varus-valgus and medial-lateral rotation and inferior to 1.8 mm for translations.Conclusion: Compared to simple fluoroscopy, the accuracy of our method based on sequential images was of the same order of magnitude, with better results for the translation in the frontal plane. The low dose of radiation of the EOS system offers promising prospects for a clinical use of this method to assess the femoro-tibial sequential kinematics.

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“…The study was based on 8 healthy subjects (age: 30-50 years, gender: 8 males, body height: 1.68-1.91 m, body weight: 67-112 kg). The geometry data and in vivo weight-bearing kinematics of a single legged stance were acquired in a previous study by our group [9]. High-resolution magnetic resonance imaging (MRI) data in supine position had been registered with low-resolution quasi-static MRI data in loaded positions at 5 different knee flexion angles.…”

Section: Methodsmentioning

confidence: 99%

Relationship of the tibial tuberosity (TT) position, tibial tuberositytrochlear groove (TT-TG) distance, and internal and external rotation of the knee under weight-bearing conditions

Asseln¹,

Meere²,

Walker³

et al.

EPiC Series in Health Sciences

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An important factor which influences the clinical outcome of total knee arthroplasty (TKA) is the internal/external rotational alignment of the femoral and tibial components. A rotational error of few degrees has been found to be clinically important and linked to anterior knee pain [1] and patellofemoral problems [2]. A commonly used reference to align the tibial component rotationally is the tibial tuberosity (TT). However, Howell et al. [3] showed that the medial/lateral TT position varies strongly between patients and represents an unreliable landmark during (passive) kinematic component alignment. Thereby, passive kinematics differs from active kinematics [4,5]. For example, under weight-bearing conditions the magnitude of internal/external rotation is greater and occurs earlier [6]. In the active situation, a relative internal rotation of the tibial component increases the Q-angle with a change in the force vector of the extensor mechanism.An established radiographic measure to quantify the relative rotational alignment of the femur and tibia in extension is the tibial tuberosity-trochlear groove (TT-TG) distance. It has been measured recently at different flexion angles under non-weight-bearing conditions [7]. However, Izadpanah et al. [8] reported that it also depends on weight-bearing. Hence, the complex function of the extensor mechanism in terms of the relationship between TT position, TT-TG distance, and internal/external rotation under weight-bearing conditions is still unknown and accordingly component rotational alignment targets.The aim of the study was to investigate the relationship between TT position, TT-TG distance, and internal/external rotation of the knee in the active (weight-bearing) situation.

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Combined magnetic resonance imaging approach for the assessment of in vivo knee joint kinematics under full weight-bearing conditions

Cited by 7 publications

References 46 publications

Augmented Active Shape Model Search – towards 3D Ultrasound-based Bone Surface Reconstruction

Augmented Active Shape Model Search – towards 3D Ultrasound-based Bone Surface Reconstruction

3D Sequential Kinematics of the Femoro-Tibial Joint of Normal Knee from Multiple Bi-planar X-rays: Accuracy and Repeatability

Relationship of the tibial tuberosity (TT) position, tibial tuberositytrochlear groove (TT-TG) distance, and internal and external rotation of the knee under weight-bearing conditions

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