Evaluation of model-enhanced ultrasound-assisted interventional guidance in a cardiac phantom.
Minimizing invasiveness associated with cardiac procedures has led to limited visual access to the target tissues. To address these limitations, we have developed a visualization environment that integrates interventional ultrasound (US) imaging with preoperative anatomical models and virtual representations of the surgical instruments tracked in real time. In this paper, we present a comprehensive evaluation of our model-enhanced US-guidance environment by simulating clinically relevant interventions in vitro . We have demonstrated that model-enhanced US guidance provides a clinically desired targeting accuracy better than 3-mm rms and maintains this level of accuracy even in the case of image-to-patient misalignments that are often encountered in the clinic. These studies emphasize the benefits of integrating real-time imaging with preoperative data to enhance surgical navigation in the absence of direct vision during minimally invasive cardiac interventions.
Linte
Cristian A
CA
Imaging Research Laboratories, Robarts ResearchInstitute, University of Western Ontario, London, ON N6A5K8, Canada. clinte@imaging.robarts.ca
Moore
John
J
Wedlake
Chris
C
Peters
Terry M
TM
D057785:Catheters; D003198:Computer Simulation; D057510:Endovascular Procedures; D006321:Heart / Q000502:physiology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008955:Models, Cardiovascular; D019047:Phantoms, Imaging; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed; D018084:Ultrasonography, Interventional / Q000379:methods*