Towards subject-specific models of the dynamic heart for image-guided mitral valve surgery.
Surgeons need a robust interventional system capable of providing reliable, real-time information regarding the position and orientation of the surgical targets and tools to compensate for the lack of direct vision and to enhance manipulation of intracardiac targets during minimally-invasive, off-pump cardiac interventions. In this paper, we describe a novel method for creating dynamic, pre-operative, subject-specific cardiac models containing the surgical targets and surrounding anatomy, and how they are used to augment the intra-operative virtual environment for guidance of valvular interventions. The accuracy of these pre-operative models was established by comparing the target registration error between the mitral valve annulus characterized in the pre-operative images and their equivalent structures manually extracted from 3D US data. On average, the mitral valve annulus was extracted with a 3.1 mm error across all cardiac phases. In addition, we also propose a method for registering the pre-operative models into the intra-operative virtual environment.
Linte
Cristian A
CA
Biomedical Engineering Graduate Program, University of Western Ontario, Canada. clinte@imaging.robarts.ca
Wierzbicki
Marcin
M
Moore
John
J
Little
Stephen H
SH
Guiraudon
Gérard M
GM
Peters
Terry M
TM
D000465:Algorithms; D001185:Artificial Intelligence; D013504:Cardiovascular Surgical Procedures / Q000379:methods; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008943:Mitral Valve / Q000033:anatomy & histology* / Q000601:surgery*; D008953:Models, Anatomic; D008954:Models, Biological; D009716:Numerical Analysis, Computer-Assisted; D010363:Pattern Recognition, Automated / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D013382:Subtraction Technique; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014584:User-Computer Interface