Figure 3

SPECT images of biodistribution of labeled cells in brain region. In-111 oxine alone did not show any activity around the tumor area. Accumulation of In-111 labeled CTLs in tumor area was seen within three hours and the activity further increased on 24 hour scans. In-111 labeled EPCs showed high activity around the tumor area in 3 hours scan, which was significantly higher compared to CTLs. 24 hours scan showed further increase in the radioactivity. Note: The increased accumulation of cells after 24 hours of injection. Window levels of signals are kept identical for all day for respective tumors.