Baseline correction of phase-contrast images in congenital cardiovascular magnetic resonance

Journal of Cardiovascular Magnetic Resonance

Research

Brian J Holland¹  Wyman W Lai¹  Beth F Printz¹ 

[1] Morgan Stanley Children's Hospital of New York Presbyterian, Columbia University Medical Center, New York, New York, USA;

关键词: Cardiac Magnetic Resonance;    Main Pulmonary Artery;    Left Pulmonary Artery;    Phase Contrast Image;    Right Pulmonary Artery;   

DOI  :  10.1186/1532-429X-12-11

 received in 2009-11-24, accepted in 2010-03-05,  发布年份 2010

来源: Springer

【 摘 要 】

BackgroundOne potential source of error in phase contrast (PC) congenital CMR flow measurements is caused by phase offsets due to local non-compensated eddy currents. Phantom correction of these phase offset errors has been shown to result in more accurate measurements of blood flow in adults with structurally normal hearts. We report the effect of phantom correction on PC flow measurements at a clinical congenital CMR program.ResultsFlow was measured in the ascending aorta, main pulmonary artery, and right and left pulmonary arteries as clinically indicated, and additional values such as Qp/Qs were derived from these measurements. Phantom correction in our study population of 149 patients resulted in clinically significant changes in 13% to 48% of these phase-contrast measurements in patients with known or suspected heart disease. Overall, 640 measurements or calculated values were analyzed, and clinically significant changes were found in 31%. Larger vessels were associated with greater phase offset errors, with 22% of the changes in PC flow measurements attributed to the size of the vessel measured. In patients with structurally normal hearts, the pulmonary-to-systemic flow ratio after phantom correction was closer to 1.0 than before phantom correction. There was no significant difference in the effect of phantom correction for patients with tetralogy of Fallot as compared to the group as a whole.ConclusionsPhantom correction often resulted in clinically significant changes in PC blood flow measurements in patients with known or suspected congenital heart disease. In laboratories performing clinical CMR with suspected phase offset errors of significance, the routine use of phantom correction for PC flow measurements should be considered.

【 授权许可】

Unknown   
© Holland et al; licensee BioMed Central Ltd. 2010. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.