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. Author manuscript; available in PMC: 2016 Apr 15.
Published in final edited form as: Methods. 2015 Nov 10;99:99–111. doi: 10.1016/j.ymeth.2015.11.004

Fig. 5.

Fig. 5

We compared the bioluminescence produced by the luciferase co-labeled cells to the MR signal for each human amniotic fluid stem cells incubated with 100 μg/mL contrast agent for 24 h. (A) Bioluminescent imaging produced a strong signal, with the detection limit of this system was above 3906 cells, at which point lower cell numbers became statistically indistinguishable from the 0 cell controls. (B) The MR signal produced by the contrast agent-labeled cells had a lower maximum intensity than the bioluminescent signal, but with a lower minimum cell number detection limit. At the lowest evaluated cell number (61 cells), the MR signal produced by the cells was statistically distinguishable from the 0 cell controls.