Fig. 1
From: Highlight selection of radiochemistry and radiopharmacy developments by editorial board
Photoswitchable MRI CA; A The thermally stable trans isomer can be switched to the metastable cis isomer, which will return to the initial form in a first order thermal process (on the timescale of seconds-minutes, depending on the temperature). B Temperature map in an NMR tube; polyethyleneimine silica beads coated with the NIR dye indocyanine green (ICG) that were warmed by infrared irradiation to act as a temperature source. (Reproduced with permission from ref. Wellm et al. (2021) under the terms of the Creative Commons Attribution-Non-Commercial License)