Skip to main content
. 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. 4.

Fig. 4

(A) Optimization of contrast agent labeling dilution and incubation time for MR imaging. Contrast agent-labeled human amniotic fluid stem cells were suspended in collagen phantoms to resemble the background signal of lung tissue and imaged. (B) Quantification of the MR signal intensity (relative to unlabeled cells in collagen phantom) showed strongest signal with the higher concentration and incubation times.