Int J Comput Assist Radiol Surg - Interventional real-time ultrasound imaging with an integrated electromagnetic field generator.

Tópicos

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Resumo

RPOSE: Ultrasound (US) guided procedures are frequently performed for diagnosis and treatment of many diseases. However, there are safety and procedure duration limitations in US-guided interventions due to poor image quality and inadequate visibility of medical instruments in the field of view. To address this issue, we propose an interventional imaging system based on a mobile electromagnetic (EM) field generator (FG) attached to a US probe.METHODS: A standard US probe was integrated with an EM FG to allow combined movement of the FG with real-time imaging to achieve (1) increased tracking accuracy for medical instruments are located near the center of the tracking volume, (2) increased robustness because the FG is distant to large metallic objects, and (3) reduced setup complexity since time-consuming placement of the FG is not required. The new integrated US-FG imaging system was evaluated by assessing tracking and calibration accuracy in a clinical setting. To demonstrate clinical applicability, the prototype US-EMFG probe was tested in needle puncture procedures.RESULTS: The mobile EMFG attached to a US probe yielded sub-millimeter tracking accuracy despite the presence of metal close to the FG. Calibration errors were in the range of 1-2?mm. In an initial phantom study on US-guided needle punctures, targeting errors of about 3?mm were achieved.CONCLUSION: A combined US-EMFG probe is feasible and effective for tracking medical instruments relative to US images with high accuracy and robustness while keeping hardware complexity low.

Resumo Limpo

rpose ultrasound us guid procedur frequent perform diagnosi treatment mani diseas howev safeti procedur durat limit usguid intervent due poor imag qualiti inadequ visibl medic instrument field view address issu propos intervent imag system base mobil electromagnet em field generat fg attach us probemethod standard us probe integr em fg allow combin movement fg realtim imag achiev increas track accuraci medic instrument locat near center track volum increas robust fg distant larg metal object reduc setup complex sinc timeconsum placement fg requir new integr usfg imag system evalu assess track calibr accuraci clinic set demonstr clinic applic prototyp usemfg probe test needl punctur proceduresresult mobil emfg attach us probe yield submillimet track accuraci despit presenc metal close fg calibr error rang mm initi phantom studi usguid needl punctur target error mm achievedconclus combin usemfg probe feasibl effect track medic instrument relat us imag high accuraci robust keep hardwar complex low

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