Christian Meierhofer1, Christine Lyko2, Eike Philipp Schneider2, Heiko Stern2, Stefan Martinoff3, John Hess2, Sohrab Fratz2. 1. Department of Pediatric Cardiology and Congenital Heart Disease, Deutsches Herzzentrum München, Technische Universität München (TUM), Munich, Germany. Electronic address: meierhofer@dhm.mhn.de. 2. Department of Pediatric Cardiology and Congenital Heart Disease, Deutsches Herzzentrum München, Technische Universität München (TUM), Munich, Germany. 3. Division of Radiology, Deutsches Herzzentrum München, Technische Universität München (TUM), Munich, Germany.
Abstract
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.
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.
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