COMPARISON BETWEEN RENDERING 3D-CT AND TRANSPARENT 3D-CT IN ACL TUNNEL POSITIONING.

作者信息

Barros Marcos Amstalden, Fernandes Tiago Lazzaretti, Dimitriou Dimitris, Pedrinelli André, Hernandez Arnaldo José

机构信息

. Universidade de São Paulo, Faculdade de Medicina, Hospital das Clínicas, Instituto de Ortopedia e Traumatologia, São Paulo, SP, Brazil.

. Massachusetts General Hospital and Harvard Medical School, Department of Orthopedic Surgery, Bioengineering Laboratory, Boston, MA, USA.

出版信息

Acta Ortop Bras. 2017 Jan-Feb;25(1):30-33. doi: 10.1590/1413-785220172501167914.

OBJECTIVE

To compare the transparent 3D computed tomography (CT) image protocol against conventional 3D-CT image-rendering protocol to assess femoral tunnel position in anatomic anterior cruciate ligament (ACL) reconstructions

METHODS

Eight knee CT scans from cadavers were analyzed by image rendering 3D-CT protocol, using Rhinoceros software. The central point of the ACL tunnel was set using the sagittal plane. Same CT scans were analyzed using transparent 3D-CT measurement protocol with OsiriX software. Central point of the ACL tunnel was set using sagittal, coronal and axial planes. The grid system described by Bernard and Hertel was used to compare tunnel positions between protocols, using height and length parameters

RESULTS

There was a significant difference between measurements using image rendering 3D-CT and transparent 3D-CT protocol for height (23.8 ± 7.9mm and 33.0 ± 5.0mm, respectively; p=0.017) and no differences for length (18.6 ± 4.2mm and 18.3 ± 4.5mm, respectively; p=0.560)

CONCLUSION

Height in transparent CT protocol was different and length was the same as compared to 3D-CT rendering protocol in Bernard and Hertel method for tunnel measurements.