Long-term <i>in vivo</i> observations after transplantation of Mn-labeled MNCs in ischemic rat legs.

<p>T₁-weighted images of intact (1^st row) and dead (2^nd row) Mn-labeled MNCs, SPECT images of intact ¹¹¹In oxine labeled MNCs (3^rd row), and fluorescence microscopy images of intact DiI-labeled MNCs (4^th row) are presented. The images were obtained between 0 and 28 days after administration. The intact Mn-labeled MNCs were typically observed for at least 7 and up to 21 days in the injected muscle (arrows). The dead Mn-labeled MNCs (arrow heads) tended to decrease in volume earlier than the intact MNCs.