2018
DOI: 10.1016/j.gaitpost.2018.06.028
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In vivo validation of patellofemoral kinematics during overground gait and stair ascent

Abstract: Previous validations of biplane radiographic systems have estimated tracking accuracy by moving cadaveric knees through simulated motions. These validations were unable to replicate in vivo kinematics, including patella motion due to muscle activation, and failed to assess the imaging and tracking challenges related to contralateral limb obstruction. By replicating the muscle contraction, movement velocity, joint range of motion, and obstruction of the patella by the contralateral limb, the present study provi… Show more

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Cited by 9 publications
(8 citation statements)
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“…Beads will be secured using Quick Grip glue, a type of contact cement that does not permanently bond to the skin like Super Glue but is strong enough to hold the bead to the skin without moving. Residual femur motion will be determined with sub-millimeter accuracy using a validated volumetric model-based tracking process that matches subject-specific bone models obtained from CT to the biplane radiographs [ 42 44 ] (Fig. 10 ).…”
Section: Methods: Participants Interventions and Outcomesmentioning
confidence: 99%
“…Beads will be secured using Quick Grip glue, a type of contact cement that does not permanently bond to the skin like Super Glue but is strong enough to hold the bead to the skin without moving. Residual femur motion will be determined with sub-millimeter accuracy using a validated volumetric model-based tracking process that matches subject-specific bone models obtained from CT to the biplane radiographs [ 42 44 ] (Fig. 10 ).…”
Section: Methods: Participants Interventions and Outcomesmentioning
confidence: 99%
“…Beads will be secured using Quick Grip glue, a type of contact cement that does not permanently bond to the skin like Super Glue, but is strong enough to hold the bead to the skin without moving. Residual femur motion will be determined with sub-millimeter accuracy using a validated volumetric model-based tracking process that matches subject-speci c bone models obtained from CT to the biplane radiographs [42][43][44] (Figure 10). Static Radiographs: A series of three static radiographic images of the residual femur within each socket will be collected under increasing load applied to the prosthetic side (25%, 50%, 100% bodyweight), with the load measured by the force plate imbedded within the treadmill.…”
Section: Plans For Assessment and Collection Of Outcomes {18a}mentioning
confidence: 99%
“…To describe the 3D, dynamic motion of a joint, 3D motion trajectories of adjacent bones are required and can be obtained by best-matching the bone geometry to the corresponding successive two-dimensional (2D) images provided by the imaging systems. To this purpose, a number of 3D/2D image registration algorithms were proposed (Flood and Banks, 2018;Haque et al, 2012;Akbari-Shandiz et al, 2018;Markelj et al, 2012;Postolka et al, 2020;Lin et al, 2020;Lin et al, 2013), in which the subject-specific bone geometry were obtained either using computed tomography (CT) (You et al, 2001;Tsai et al, 2010;Postolka et al, 2020;Pitcairn et al, 2018), magnetic resonance (MR) imaging (Moro-Oka et al, 2007; Van de Velde and Bingham, 2008;Moewis et al, 2012) or statistical shape models (Tsai et al, 2015).…”
Section: Introductionmentioning
confidence: 99%
“…The geometric model obtained from the CT preserves the radiodensity of the bone, which allowed further generation of a digitally reconstructed radiograph (DRR) through a ray-tracing technique (Siddon, 1985), a synthetic image showing similar contrast to the real fluoroscopic images. Given the merit of the DRR, the CT-based bone models are commonly used in the 3D/2D image registration tasks (You et al, 2001;Tsai et al, 2010;Postolka et al, 2020;Pitcairn et al, 2018). In order to minimize the radiation exposure on the subjects, on the other hand, MR images may be a potential alternative to the CT images.…”
Section: Introductionmentioning
confidence: 99%