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Abstract #1971

Phantom for Phase-Contrast MRI Sequence Validation and Quality Control

Alireza Vali1, Sebastian Schmitter2, Liliana Ma1,3, Xiaoke Huang1, Sebastian Flassbeck4, Simon Schmidt4, Michael Markl1,3, and Susanne Schnell1

1Radiology, Northwestern University, Chicago, IL, United States, 2Physikalisch Technische Bundesanstalt, Braunschweig and Berlin, Germany, 3Biomedical Engineering, Northwestern University, Evanston, IL, United States, 4Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany

Systematic assessment and optimization of 2D Phase-Contrast (PC) MRI as well as 4D flow MRI sequences require reliable phantoms that can create known velocity fields with large velocity ranges corresponding to different cardiovascular regions. An air-driven rotation phantom was constructed and its performance in establishing well-defined velocity fields at different rotational speeds was examined using 3-directional 2D PC MRI acquisitions. Furthermore, the reproducibility of the phantom was examined with a test-retest experiment on two different days. It was demonstrated that the phantom could create reproducible linear velocity fields to be used as a reference for in-vitro validation of PC MRI sequence.

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