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PIANO identifiability testing: advection imaging via advection-diffusion. Top row shows ‖Vgt‖2 used for simulating ground truth pure advection. Rows below show the estimated ‖Vest‖2 and Dest on corresponding slices. Note that the plotted value scale for Dest is 0.01 of that for ‖Vgt‖2 and ‖Vest‖2.
