Figure 6: In vivo bioluminescence imaging. Representative in vivo bioluminescence images of pancreatic islets transplanted into scaffolds without (a) and with MSCs (b). Images show the scaffolds on day 7 after PI transplantation. Differences between optical signals originating from pancreatic islets transplanted on day 4 and day 7 after rod removal without (c) and with MSC support (d). D4 and D7 refer to the day after rod removal. .