Recent advances in stem cell therapy for neurodegenerative disease: Three dimensional tracing and its emerging use

Figure 2 Schematic overview of different methods for stem cell labeling. A: Schematic overview of the processes for direct cell labeling; B: Schematic overview of the steps for indirect cell labeling; C: A diagram of different imaging method for tracking stem cells. This figure was modified from references[80,81]. MRI: Magnetic resonance imaging; PET: Positron emission tomography; SPECT: Single-photon emission computed tomography.