title: Baseline correction does not improve flow quantification in phase-contrast velocity measurement for routine clinical practice.
abstract: BACKGROUND
  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.
authors: Department of Pediatric Cardiology and Congenital Heart Disease, Deutsches Herzzentrum München, Technische Universität München (TUM), Munich, Germany. Electronic address: meierhofer@dhm.mhn.de.
authors: Christian
authors: C
authors: Meierhofer
authors: Department of Pediatric Cardiology and Congenital Heart Disease, Deutsches Herzzentrum München, Technische Universität München (TUM), Munich, Germany.
authors: Christine
authors: C
authors: Lyko
authors: Department of Pediatric Cardiology and Congenital Heart Disease, Deutsches Herzzentrum München, Technische Universität München (TUM), Munich, Germany.
authors: Eike Philipp
authors: EP
authors: Schneider
authors: Department of Pediatric Cardiology and Congenital Heart Disease, Deutsches Herzzentrum München, Technische Universität München (TUM), Munich, Germany.
authors: Heiko
authors: H
authors: Stern
authors: Division of Radiology, Deutsches Herzzentrum München, Technische Universität München (TUM), Munich, Germany.
authors: Stefan
authors: S
authors: Martinoff
authors: Department of Pediatric Cardiology and Congenital Heart Disease, Deutsches Herzzentrum München, Technische Universität München (TUM), Munich, Germany.
authors: John
authors: J
authors: Hess
authors: Department of Pediatric Cardiology and Congenital Heart Disease, Deutsches Herzzentrum München, Technische Universität München (TUM), Munich, Germany.
authors: Sohrab
authors: S
authors: Fratz
mesh_terms: D001783:Blood Flow Velocity; D005260:Female; D006330:Heart Defects, Congenital / Q000503:physiopathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008297:Male; D019047:Phantoms, Imaging
keywords: Baseline correction; Cardiovascular magnetic resonance; Flow quantification; Shunt calculation