Evaluation of lumbar disc and spine morphology: long-term repeatability and comparison of methods
Data(s) |
01/01/2012
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Resumo |
Establishing the long-term repeatability of quantitative measures of lumbar intervertebral disc and spinal morphology is important for planning interventional studies. We aimed to examine this issue and to determine to what extent a smaller number of measurements per disc or vertebral level could be used to save operator time without compromising measurement precision. Twenty-one healthy male subjects were scanned at baseline and 1.5 years later. On sagittal MR-scans intervertebral disc cross-sectional area, anterior disc height, posterior disc height, intervertebral angle and intervertebral length were measured. The repeatability of the average value from all sagittal images or from 1, 3, 5 or 7 images centred at the spinous process was evaluated. Bland-Altman analysis showed all measurements to be repeatable between testing days. Intervertebral length was the most precise measurement (coefficients of variation [CVs] between 1.2% and 1.5%), followed by disc cross-sectional area (CVs between 2.9% and 3.6%). Variance component analysis showed that using 7 images, but not 1, 3 or 5 images, resulted in a similar level of measurement error as when measurements from all images were included. |
Identificador | |
Idioma(s) |
eng |
Publicador |
IOP Publishing |
Relação |
http://dro.deakin.edu.au/eserv/DU:30071029/belavy-evaluationoflumber-2012.pdf http://www.dx.doi.org/10.1088/0967-3334/33/8/1313 |
Direitos |
2012, IOP Publishing |
Palavras-Chave | #Science & Technology #Life Sciences & Biomedicine #Technology #Biophysics #Engineering, Biomedical #Physiology #Engineering #reliability #reproducibility #spinal surgery #low back pain #IDIOPATHIC SCOLIOSIS #DEGENERATION #AGREEMENT #VOLUME #STRAIN #MRI |
Tipo |
Journal Article |