Baseline correction does not improve flow quantification in phase-contrast velocity measurement for routine clinical practice

Introduction: Velocity offset errors may influence flow measurement in phase-contrast cardiovascular magnetic resonance (CMR). By using a stationary gel phantom, offset errors probably may be corrected. We tested its impact on flow measurement and, in particular, on shunt calculation in patients proven not to have any shunt. Methods: Flow measurements were carried out in 24 patients with congenital heart disease. Baseline correction was performed by using a stationary gel phantom. Results: Significantly more patients without shunts incorrectly showed a calculated shunt after baseline correction. Conclusions: Baseline correction did not improve flow measurement and was clinically not relevant for routine CMR.