Abstract
Comparison of Two Methods for Correcting Baseline Offset Error in Phase-Contrast MR Imaging
Highlights
Phase-contrast MRI (PC-MRI) can be used to assess valvular heart diseases
The surface-fitting method reduced the Qp/Qs ratios in all cases while the phantom correction method increased the ratio in one case
Authors’ details 1Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
Summary
Phase-contrast MRI (PC-MRI) can be used to assess valvular heart diseases. It can measure pulmonarysystemic flow ratio (Qp/Qs) and help identify intracardiac shunts. Phase offsets in PC-MRI caused by main field inhomogeneity and eddy-current introduce baseline offset errors in flow quantification and Qp/Qs. phase offsets in PC-MRI caused by main field inhomogeneity and eddy-current introduce baseline offset errors in flow quantification and Qp/Qs This error can be corrected by surface-fitting [1] or using a separate phantom acquisition [2]. A recent study found that the phantom acquisition method did not help reduce error of Qp/Qs [3]. This study compared the effectiveness of the two baseline correction methods in reducing phase errors when measuring Qp/Qs in healthy volunteers using PC-MRI
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