4D modelling for rapid assessment of biventricular function in congenital heart disease
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Although more patients with congenital heart disease (CHD) are now living longer due to better surgical interventions, they require regular imaging to monitor cardiac performance. There is a need for robust clinical tools which can accurately assess cardiac function of both the left and right ventricles in these patients. We have developed methods to rapidly quantify 4D (3D + time) biventricular function from standard cardiac MRI examinations. A finite element model was interactively customized to patient images using guide-point modelling. Computational efficiency and ability to model large deformations was improved by predicting cardiac motion for the left ventricle and epicardium with a polar model. In addition, large deformations through the cycle were more accurately modeled using a Cartesian deformation penalty term. The model was fitted to user-defined guide points and image feature tracking displacements throughout the cardiac cycle. We tested the methods in 60 cases comprising a variety of congenital heart diseases and showed good correlation with the gold standard manual analysis, with acceptable inter-observer error. The algorithm was considerably faster than standard analysis and shows promise as a clinical tool for patients with CHD.
KeywordsCongenital heart disease Biventricular modelling Cardiac function assessment
This research was supported by the National Institutes of Health (NHLBI R01HL121754). The authors would also like to gratefully acknowledge the National Heart Foundation of New Zealand.
Kathleen Gilbert was funded by Green Lane Research and Education Fund.
Compliance with ethical standards
Conflict of interest
AAY reports receiving consulting fees from Siemens Healthcare.
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