Int J Med Robot - Comparison of optical and electromagnetic tracking for navigated lateral skull base surgery.

Tópicos

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Resumo

CKGROUND: Navigation with optical tracking sometimes makes it difficult to establish a line-of-sight in cluttered operating theatres. On the other hand, the accuracy of electromagnetic tracking is influenced by ferromagnetic surgical equipment. We compared electromagnetic with optical tracking under controlled conditions for the lateral skull base.METHODS: Six anatomical specimens were dissected to measure the target registration error (TRE) in and around the petrous bone in a wet laboratory to simulate an intraoperative setting. Specimens were registered with passive optical and electromagnetic tracking.RESULTS: Overall accuracy was better using optical tracking than electromagnetic tracking (0.22mm; 0.07-0.48 vs 0.99mm; 0.56-1.27mm; median, lower and upper quartiles, respectively; p<0.001).CONCLUSION: The accuracy of optical tracking was near the resolution of the camera system, whereas the accuracy of electromagnetic tracking was lower. Only optical tracking allows for an application accuracy of considerably less than 1mm in high-resolution datasets.

Resumo Limpo

ckground navig optic track sometim make difficult establish lineofsight clutter oper theatr hand accuraci electromagnet track influenc ferromagnet surgic equip compar electromagnet optic track control condit later skull basemethod six anatom specimen dissect measur target registr error tre around petrous bone wet laboratori simul intraop set specimen regist passiv optic electromagnet trackingresult overal accuraci better use optic track electromagnet track mm vs mm mm median lower upper quartil respect pconclus accuraci optic track near resolut camera system wherea accuraci electromagnet track lower optic track allow applic accuraci consider less mm highresolut dataset

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