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Figure 7
Three regions of a normalized radiograph (a) displaying significant false water artefacts. Region 1 is entirely within the solid graphite block. Region 2 samples a heterogeneous region of the radiograph, including rib, channel and GDL. Region 3 samples a region of the radiograph well below the vertical position of the hotspot. The mean water thickness values for each of the three regions (solid lines), with a linear fit (dashed lines) at a single point in time (b). Normalized values of the three regions' gradients over 3 min compared with the calculated vertical hotspot position for the same image sequence (c).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 19| Part 6| November 2012| Pages 994-1000
https://doi.org/10.1107/S0909049512039118
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