Comput. Aided Surg. - Accuracy of a 3D fluoroscopic navigation system using a flat-panel detector-equipped C-arm.

Tópicos

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Resumo

JECTIVE: The aim of this study was to evaluate the accuracy of a novel 3-dimensional (3D) fluoroscopic navigation system using a flat-panel detector-equipped C-arm, focusing on the influence of the distance from the center of fluoroscopic imaging on navigation accuracy.MATERIALS AND METHODS: A geometric phantom was made using a Styrofoam cube with 25 markers, each consisting of a metal ball 1.5mm in diameter, fixed in a cross arrangement at 1-cm intervals. Hip joint surgery was simulated using a set of dry pelvic and femoral bones. A total of eight markers were fixed to the acetabulum and proximal femur.RESULTS: In the geometric phantom study, mean target registration error (TRE) was 0.7mm (range: 0.1-1.5). The TRE of markers located at 5cm from the imaging center was significantly higher than the TRE of markers located at 1 and 2cm. However, the TRE was <1mm in 90% of the overall trials and <1.5mm in 100%. In the dry bone study, the mean TRE was 0.9mm (range: 0.7-1.5) over the acetabulum and 1.0mm (range: 0.5-1.4) over the femur. No significant difference in TRE was seen between the acetabulum and proximal femur.CONCLUSION: The accuracy of this novel 3D fluoroscopic navigation system was considered acceptable for clinical application. A 3D C-arm equipped with a flat-panel detector could increase the feasibility of 3D fluoroscopic navigation by reducing the effects of image distortion on navigation accuracy.

Resumo Limpo

jectiv aim studi evalu accuraci novel dimension d fluoroscop navig system use flatpanel detectorequip carm focus influenc distanc center fluoroscop imag navig accuracymateri method geometr phantom made use styrofoam cube marker consist metal ball mm diamet fix cross arrang cm interv hip joint surgeri simul use set dri pelvic femor bone total eight marker fix acetabulum proxim femurresult geometr phantom studi mean target registr error tre mm rang tre marker locat cm imag center signific higher tre marker locat cm howev tre mm overal trial mm dri bone studi mean tre mm rang acetabulum mm rang femur signific differ tre seen acetabulum proxim femurconclus accuraci novel d fluoroscop navig system consid accept clinic applic d carm equip flatpanel detector increas feasibl d fluoroscop navig reduc effect imag distort navig accuraci

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