Kenjirou Ohashi MD, Presenter: Nothing to Disclose

Tina S. Sanghvi, Abstract Co-Author: Nothing to Disclose

Georges Yousef El-Khoury MD, Abstract Co-Author: Nothing to Disclose

Joong Mo Ahn MD, PhD, Abstract Co-Author: Nothing to Disclose

Darus Lee Bennett MD, MA, Abstract Co-Author: Nothing to Disclose

Mats Erik Geijer MD, Abstract Co-Author: Nothing to Disclose

Kevin Staley Berbaum PhD, Abstract Co-Author: Nothing to Disclose

00030490-DMT et al, Abstract Co-Author: Nothing to Disclose

To test diagnostic accuracy of volume rendered 3D CT images of bone and tendon for peroneal tendon dislocation in patients with acute calcaneal fractures.

The study consisted of 121 ankle CT studies from 105 consecutive patients (85 males and 20 females; mean age, 42 year-old; range, 16 – 75 years) with acute calcaneal fractures. Peroneal tendon dislocation was diagnosed with multiplanar (MPR) CT images by consensus of 2 experienced musculoskeletal radiologists, which served as the reference standard. Three other musculoskeletal radiologists (1-4 years of experience with volume rendered 3D images) blindly reviewed volume rendered 3D images alone on a workstation. The readers determined whether or not there was peroneal tendon dislocation with three degrees of certainty (definite, probably, and possibly). Diagnostic accuracy for peroneal tendon dislocation was evaluated by calculating sensitivities and specificities and with receiver operating characteristic (ROC) methods.

Forty three (36%) out of 121 studies showed peroneal tendon dislocation based on the expert readings using MPR images. Sensitivities/specificities of volume rendered 3D images measured 0.92, 0.88, 0.81/0.81, 0.90, 0.92 for three readers, respectively. Area under the proper binormal ROC curve based on all three readers (0.93, 0.94, & 0.92) measured 0.93 with a 95% confidence interval of 0.89 – 0.98.

Diagnostic accuracy of volume rendered 3D images is comparable to that of MPR images for the diagnosis of peroneal tendon dislocation in patients with acute calcaneal fractures.

CT is commonly indicated for pre-operative assessment of calcaneal fracture. Volume rendered 3D images of bone and tendon alone can accurately diagnose peroneal tendon dislocation.

Ohashi, K, Sanghvi, T, El-Khoury, G, Ahn, J, Bennett, D, Geijer, M, Berbaum, K, et al, 0, Diagnostic Accuracy of Volume Rendered 3D CT Images for Peroneal Tendon Dislocation.  Radiological Society of North America 2009 Scientific Assembly and Annual Meeting, November 29 - December 4, 2009 ,Chicago IL. http://archive.rsna.org/2009/8002656.html