Soft-tissue artefact assessment during step-up using fluoroscopy and skin-mounted markers

Garling, E.H.; Kaptein, Bart L; Mertens, Bart; Barendregt, W.; Veeger, H.E.J.; Nelissen, Rob G H H; Valstar, Edward R.

doi:10.1016/j.jbiomech.2007.03.003

Cited by 94 publications

(77 citation statements)

References 28 publications

(37 reference statements)

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“…During walking and other motor tasks, measurement inaccuracy associated with skin markers can exceed considerably the true skeletal motion [21,29,30,[33][34][35]. In particular, because of the distribution of the soft tissues about the long bones of the lower limb, joint axial rotation is much affected [21,29].…”

Section: Discussionmentioning

confidence: 99%

Range of motion and repeatability of knee kinematics for 11 clinically relevant motor tasks

Desloovere

Wong²,

Swings

et al. 2010

Gait & Posture

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Standard gait analysis reports knee joint rotations in the three anatomical planes without addressing their different levels of reliability. Most clinical studies also restrict analysis to knee flexion-extension, because knee abduction-adduction and axial rotation are small with respect to the corresponding amount of measurement artefact. This study analyses a set of 11 motor tasks, in order to identify those that are adequately repeatable and that can induce greater motion at the knee than walking. Ten volunteers (mean ± SD age: 29 ± 9 years) each underwent three motion analysis sessions on different days with a standard gait analysis system and protocol. In each session they performed normal walking, walking with sidestep and crossover turns, ascent onto and descent off a step, descent with sidestep and crossover turns, chair rise, mild and deep squats, and lunge. Range and repeatability of motions in the three anatomical planes were compared by ANOVA. The sidestep turns showed a range of axial rotation significantly larger than that in walking (about 8°), while maintaining similar levels of repeatability. Ascent, chair rise, squat, and lunge showed greater flexion ranges than walking; among these, ascent was the most repeatable. The results show that turning increases knee axial rotation in young subjects significantly. Further, squats and lunges, currently of large interest in orthopaedics and sports research, have smaller repeatability, likely accounted for to the smaller constraints than in the traditional motor tasks.

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Section: Discussionmentioning

confidence: 99%

Range of motion and repeatability of knee kinematics for 11 clinically relevant motor tasks

Desloovere

Wong²,

Swings

et al. 2010

Gait & Posture

View full text Add to dashboard Cite

show abstract

“…The patients were asked to perform a step-up motion, with the knee centered between the image intensifier and focus of a fluoroscope (15 frames/s; 1024 Â 1024 image matrix; pulse width of 1 ms) [4]. Prior to measurements, an image run of 3 s Relative movement of skin markers to underlying bone limits a valid interpretation of axial femorotibial rotation in noninvasive optoelectronic gait analysis.…”

Section: Methodsmentioning

confidence: 99%

“…Especially for the thigh this soft-tissue artefact is expected to be considerable. [3] Garling et al found a maximal axial rotational error of 78 for strap-mounted shank markers, while the maximal thigh markers error was as high as 128 during a step-up motion [4].…”

Section: Introductionmentioning

confidence: 99%

The Femoral Epicondylar Frame to track femoral rotation in optoelectronic gait analysis

et al. 2011

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“…To derive the motion of the skeleton, various methods with direct access to the bone (e.g., intra-cortical pins [5,33], external fixators [11], percutaneous trackers [30,39], fluoroscopy [20,50]) have been proposed. These techniques are robust, but they are strongly invasive and impede natural motion patterns.…”

Section: Related Workmentioning

confidence: 99%

Motion study of the hip joint in extreme postures

et al. 2009

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Many causes can be at the origin of hip osteoarthritis (e.g., cam/pincer impingements), but the exact pathogenesis for idiopathic osteoarthritis has not yet been clearly delineated. The aim of the present work is to analyze the consequences of repetitive extreme hip motion on the labrum cartilage. Our hypothesis is that extreme movements can induce excessive labral deformations and lead to early arthritis. To verify this hypothesis, an optical motion capture system is used to estimate the kinematics of patient-specific hip joint, while soft tissue artifacts are reduced with an effective correction method. Subsequently, a physical simulation system is used during motion to compute accurate labral deformations and to assess the global pressure of the labrum, as well as any local pressure excess that may be physiologically damageable. Results show that peak contact pressures occur at extreme hip flexion/abduction and that the pressure distribution corresponds with radiologically observed damage zones in the labrum.

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Soft-tissue artefact assessment during step-up using fluoroscopy and skin-mounted markers

Cited by 94 publications

References 28 publications

Range of motion and repeatability of knee kinematics for 11 clinically relevant motor tasks

Range of motion and repeatability of knee kinematics for 11 clinically relevant motor tasks

The Femoral Epicondylar Frame to track femoral rotation in optoelectronic gait analysis

Motion study of the hip joint in extreme postures

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