Figure 2
From: Assessment of three techniques for delivering stem cells to the heart using PET and MR imaging
Example of PET and MR coregistered images. MR image (a), PET image (b), and registered PET-MR image (c) of the heart of a rat injected with FDG- and SPIO-labeled stem cells directly in the myocardium, showing the high concentration of stem cells in the myocardium. The dark regions (indicated by arrows) in the MRI image are the SPIO-labeled stem cells, whereas the bright regions (indicated by arrows) in the PET image are FDG-labeled stem cells. Images were registered using MIPAV software using landmark registration algorithm. The PET-MR registered image was used to accurately define the region of interest for quantifying the ID% of the stem cell retention.