کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6208287 1265682 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Quantifying skin motion artifact error of the hindfoot and forefoot marker clusters with the optical tracking of a multi-segment foot model using single-plane fluoroscopy
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
پیش نمایش صفحه اول مقاله
Quantifying skin motion artifact error of the hindfoot and forefoot marker clusters with the optical tracking of a multi-segment foot model using single-plane fluoroscopy
چکیده انگلیسی

The trajectories of skin-mounted markers tracked with optical motion capture are assumed to be an adequate representation of the underlying bone motions. However, it is well known that soft tissue artifact (STA) exists between marker and bone. This study quantifies the STA associated with the hindfoot and midfoot marker clusters of a multi-segment foot model. To quantify STA of the hindfoot and midfoot marker clusters with respect to the calcaneus and navicular respectively, fluoroscopic images were collected on 27 subjects during four quasi-static positions, (1) quiet standing (non-weight bearing), (2) at heel strike (weight-bearing), (3) at midstance (weight-bearing) and (4) at toe-off (weight-bearing).The translation and rotation components of STA were calculated in the sagittal plane. Translational STA at the calcaneus varied from 5.9 ± 7.3 mm at heel-strike to 12.1 ± 0.3 mm at toe-off. For the navicular the translational STA ranged from 7.6 ± 7.6 mm at heel strike to 16.4 ± 16.7 mm at toe-off. Rotational STA was relatively smaller for both bones at all foot positions. For the calcaneus they varied between 0.1 ± 2.2° at heel-strike to 0.2 ± 0.6° at toe-off. For the navicular, the rotational STA ranged from 0.6 ± 0.9° at heel-strike to 0.7 ± 0.7° at toe-off. The largest translational STA found in this study (16 mm for the navicular) was smaller than those reported in the literature for the thigh and the lower leg, but was larger than the STA of individual spherical markers affixed to the foot.The largest errors occurred at toe-off position for all subjects for both the hindfoot and midfoot clusters. Future studies are recommended to quantify true three-dimensional STA of the entire foot during gait.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gait & Posture - Volume 34, Issue 1, May 2011, Pages 44-48
نویسندگان
, , ,