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.
Imaging Research Laboratories, Robarts ResearchInstitute, University of Western Ontario, London, ON N6A5K8, Canada. clinte@imaging.robarts.ca
Cristian A
CA
Linte
John
J
Moore
Chris
C
Wedlake
Terry M
TM
Peters
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*