With ultra-short-time-to-echo sequences our group is succesfull in tracking iron-oxide labeled stem cells in-vivo even weeks after their transplantation.
Ref:
[1] On Possible Pitfalls in Working on SPIO Labelled Cells with 2D UTE Sequences Proc. Intl. Soc. Mag. Reson. Med. (2010), S. 1875
[2]Quantification of Cell Density of SPIO-Labelled Cell Populations Proc. Intl. Soc. Mag. Reson. Med. (2010), S. 4192
[3] Human Vascular Progenitor Cells Can Guide Mesodermal Lineage Choice of Mesenchymal Stem and Progenitor Cells After Co-Transplantation In Vivo ASH Annual Meeting and Exposition (2010), S. 939
[4] Imaging of SPIO Labelled Endothelial Networks at 3, 7 and 11.7 Tesla Proc. Intl. Soc. Mag. Reson. Med. (2009), S. 915
[5] UTE Imaging for Single Cell Detection with Positive Contrast Proc. Intl. Soc. Mag. Reson. Med. (2009), S. 804