A new CT scan method for measuring the tibial tubercle trochlear groove distance in patellar instability
作者： Sander Koëter , Wieger G. Horstmann , Frank-Christiaan B.M. Wagenaar , Wouter Huysse , Ate B. Wymenga
DOI: 10.1016/J.KNEE.2006.11.003
关键词:
摘要: Patellar malalignment leading to objective or potential patella instability can be caused by tibial tuberosity lateralisation. This treated with a medialisation. CT scan measurements are needed assess the tubercle trochlear groove distance. When using previously described methods determine this distance it difficult anatomical structures on maximum intensity projection images, and lead measurement error. study was designed compare reliability of new computer based method For each method, four observers measured 50 knees twice. The inter- intra-observer variability for conventional were determined. Using number which difference between aggregate mean all eight duplicate per observer greater than 2 mm varied among 7 24 knees, while variation seven same method. limits reproducibility from different improved 25%, indicating that error is considerably smaller We advise more accurate improve selection patients
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