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Table 2 sensitivity, specificity, PPVa and NPVb for cam type morphology comparing radiographs and dynamic CT scans with the per-operative assessment

From: Diagnostic sensitivity and specificity of dynamic three-dimensional CT analysis in detection of cam and pincer type femoroacetabular impingement

Alpha angle on X-ray84%72%88%63%
Dynamic CT impingement90%43%79%64%
  1. aPositive predictive value
  2. bNegative predictive value