Key result
Analytically derived equations for optimal systolic and diastolic trigger delays demonstrated excellent agreement with clinical measurements, enabling automatic delay selection for cardiac MRI.
Observational (n=87)
This work aims to analytically determine optimal trigger delays for cardiac MRI to minimize motion artifacts when heart rate varies.
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May support automated trigger timing in cardiac MRI; leaves open prospective validation of artifact reduction.
Background Single-phase cardiac MRI acquires data only during a brief period of the cardiac cycle. To avoid motion artifacts, the operator must select a trigger delay that corresponds to a period of minimal cardiac motion, typically at end-systole or mid-diastole. This can be done by inspecting a prior cine scan for quiescent periods. However, because these cardiac phases can vary in temporal position and duration as a function of heart rate, another option should be available if the heart rate at the time of the single-phase scan differs from that during the cine scan. The goal of this work was to analytically determine the optimal trigger delays for cardiac MRI. Methods
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Slavin et al. (2014) conducted an observational in Cardiac MRI (n=87). Analytically derived trigger delay equations vs. Clinical measurements from cine scans was evaluated on Agreement between predicted and measured trigger delays. Analytically derived equations for optimal systolic and diastolic trigger delays demonstrated excellent agreement with clinical measurements, enabling automatic delay selection for cardiac MRI.
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