Investigation of video techniques for dynamic measurements of relative vertebral-body motion in vitro.
The precision and accuracy of techniques for analysis of lumbar spinal-segment motions were evaluated using a specially designed orthogonal axis fixture and video image processing. Triplicate validation tests were performed by monitoring precisely controlled motions of the triaxial measurement devic...
| Publicado en: | Biomedical Instrumentation & Technology Vol. 30; no. 1; pp. 62 - 71 |
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| Autores principales: | , , , , , , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Association for the Advancement of Medical Instrumentation (AAMI)
1996 Jan-Feb
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=107248784&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 107248784 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 08998205 FZO jtl: Biomedical Instrumentation & Technology issn: 08998205 maglogo: N pubinfo: dt: 1996 Jan-Feb vid: 30 iid: 1 pid: 13730 pub: Association for the Advancement of Medical Instrumentation (AAMI) place: Arlington, Virginia artinfo: ui: 107248784 107248784 NLM8850597 1998014104 NLM8850597 107248784 ppf: 62 ppct: 9 formats: tig: atl: Investigation of video techniques for dynamic measurements of relative vertebral-body motion in vitro. aug: au: Moeini SMR Lemons JE McCutcheon MJ Molz FJ IV Moeini, S M Lemons, J E McCutcheon, M J Molz, F J 4th affil: Department of Biomedical Engineering, University of Alabama at Birmingham 35294-3295, USA sug: subj: Biomechanics Spine Videorecording Motion Data Analysis, Statistical Human ab: The precision and accuracy of techniques for analysis of lumbar spinal-segment motions were evaluated using a specially designed orthogonal axis fixture and video image processing. Triplicate validation tests were performed by monitoring precisely controlled motions of the triaxial measurement device. The errors of the overall measurements were found to be less than 0.5 mm for axial and 1 degree for rotational displacements. The system accuracy was within 0.230 mm based on the calculation of the points on a calibration frame. The geometry of the calibration frame was designed with the capability to analyze the 3-D motion properties of a swine lumbar spine. Statistical analyses of the validation test data showed that the precision and accuracy of this motion-analysis system offer new opportunities for the measurement of total-length spinal-motion profiles. The system was then applied utilizing fresh thawed swine spines to test the limits of relative-motion measurements for the centers of adjacent vertebrae in a coupled unit. Lateral-medial and anterior-posterior video images of spines and the triaxial measurement devices were made simultaneously while applying cyclic axial and torsional loads. The distribution of data from six spines illustrated biological variability of relative displacements for adjacent coupled vertebrae. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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