Fig. 3From: Safety and tracking of intrathecal allogeneic mesenchymal stem cell transplantation in healthy and diseased horsesScintigraphic images obtained 5 h after AO injection of free radiolabel. External radioactive markers were placed at the second cervical (C2) vertebra (a, b), the first (T1) (c, d), seventh (T7) (d, e), thirteenth (T13) (e, f), and eighteenth (T18) (f) thoracic vertebrae. A weak radioactive signal from free 99mTc-HMPAO reached the lumbar area by 5 h after injection (f). Uptake was apparent in the thyroid gland (a, b) due to diffusion of the free label outside of the subarachnoid space (arrows)Back to article page