We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Errors in Measuring Glenohumeral Arthrokinematics With 2-Dimensional Fluoroscopy.
- Authors
Makhija, Meena; Sethi, Jasobanta; Kataria, Chitra; Singh, Harpreet; Ludewig, Paula M.; Phadke, Vandana
- Abstract
Two-dimensional fluoroscopic imaging allows measurement of small magnitude humeral head translations that are prone to errors due to optical distortion, out-of-plane imaging, repeated manual identification of landmarks, and magnification. This article presents results from in vivo and in vitro fluoroscopy-based experiments that measure the errors and variability in estimating the humeral head translated position in true scapular plane and axillary views. The errors were expressed as bias and accuracy. The variability with repeated digitization was calculated using the intraclass correlation coefficient (ICC) and the standard error of measurement. Optical distortion caused underestimation of linear distances. The accuracy was 0.11 and 0.43 mm for in vitro and in vivo experiments, respectively, for optical distortion. The intrarater reliability was excellent for both views (ICC =.94 and.93), and interrater reliability was excellent (ICC =.95) for true scapular view but moderate (ICC =.74) for axillary views. The standard error of measurement ranged from 0.27 to 0.58 mm. The accuracy for the humeral head position in 10° out of true scapular plane images ranged from 0.80 to 0.87 mm. The current study quantifies the magnitude of error. The results suggest that suitable measures could be incorporated to minimize errors and variability for the measurement of glenohumeral parameters.
- Subjects
IN vitro studies; RADIOGRAPHIC magnification; IN vivo studies; RESEARCH evaluation; AXILLA; FLUOROSCOPY; INTER-observer reliability; GLENOHUMERAL joint; HUMERUS; INTRACLASS correlation; HEART beat; DESCRIPTIVE statistics; RESEARCH bias; KINEMATICS; MEASUREMENT errors; ROTATOR cuff
- Publication
Journal of Applied Biomechanics, 2021, Vol 37, Issue 3, p282
- ISSN
1065-8483
- Publication type
Article
- DOI
10.1123/jab.2020-0098