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Abstract #3710

Aortic Compliance Evaluation: Comparison of Time Delay Algorithms

Yi Wang1, Edwin Estrada1, Jianping Zhang2

1Research and Education, St. Francis Hospital, Roslyn, NY, United States; 2Applied Mathematics and Statistics, State University of New York, Stony Brook, NY, United States

Aortic pulse wave velocity (PWV), a measurement of the flow pulse traveling along aorta as a surrogate for aortic compliance, can be assessed using a single breath-hold through-plane phase contrast imaging technique. Accurate determination of the time delay between flows in ascending and descending aorta is critical in PWV assessment. Various approaches have been studied, including measuring the intervals between flow onset points, between maximal flow points, and between parallel upslopes after least squares fittings. We compared five automated approaches for time delay detection and evaluated their effects on aortic compliance and their relationship to age in 186 normal volunteers.