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RD MRI of HP propane in microfluidic chips with (a) a widened channel in the middle part and (b) ladder-like channels (outlined in white). These images are the sum of the panels measured at different TOF instances, and they expose, e.g., manufacturing imperfections. Flow velocities extracted from TOF data are shown in (b). Reproduced with permission from Ref. [231a] © John Wiley & Sons, Ltd., 2010.
