Abstract
In-vivo validation of interpolation-based phase offset correction in MR flow quantification: a multi-vendor, multi-center study
Highlights
Velocity offset errors in phase contrast MR imaging are a known problem in clinical assessment of flow volumes in vessels around the heart
Within the same day a phantom measurement was obtained with identical acquisition parameters
Interpolated velocity offsets from the in-vivo data were calculated using the algorithm of Walker et al [4,5], after manually excluding regions of spatial wraparound
Summary
Velocity offset errors in phase contrast MR imaging are a known problem in clinical assessment of flow volumes in vessels around the heart. Earlier studies showed that offset errors can be clinically relevant over different systems, and are not consistently reduced by protocol optimization [1,2]. Correction methods using phantom measurements are time consuming, and assume reproducibility of the offsets which is not the case for all systems [3]. An alternative solution is to correct the in-vivo data in post-processing, interpolating the velocity offset from stationary tissue within the field-of-view [4]. Complementing a previous single center study [5], this study aims to validate this offset correction in-vivo in a multi-vendor, multi-center setup
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