Why the study?
Are anteroposterior scout computed tomography scanograms reliable for measuring paediatric limb length discrepancy?
Are anteroposterior scout computed tomography scanograms reliable for measuring paediatric limb length discrepancy?
Computed tomography scanograms demonstrate high intrarater and interrater reliability for measuring paediatric limb length discrepancy, with errors similar to orthoroentgenograms.
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CT scout scanograms offer high reliability for pediatric limb measurements; leaves open whether precision justifies routine clinical use over established methods.
This study determined the intrarater and interrater reliabilities of measurements of paediatric limb length discrepancy on anteroposterior scout computed tomography scanograms. Seven physicians measured 26 films at two measuring sessions, separated by at least 8 weeks. High intraclass correlation coefficients above 0.96 were observed for measures by different raters within one session and also for repeat measures by the same raters across sessions. The intrarater, intersessional 95% limits of agreement were +/-6 mm for tibial length, +/-5 mm for femoral length and +/-7 mm for total limb length. These errors are similar to those seen with the use of orthoroentgenograms.
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Poutawera et al. (2010) studied this question.
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