Plastic Scintillators Enable Live Imaging of 32P-labelled Phosphorus Movement in Large Plants

We updated our imaging system, namely real-time radioisotope imaging system (RRIS) to observe 32P movement in large plants using a large size scintillator. In the previous version of RRIS, the view was limited by the size of a CsI (Tl) scintillator deposited on a fiber optic plate (FOS). However, owing to the high price and difficulty in handling of FOS, the view area was limited to 100×200 mm. In this study, we evaluated 5 large and low-cost plastic scintillators and showed that plastic scintillators can be used in RRIS for the quantitative analysis of 32P. We also evaluated the resolution of the imaging system with plastic scintillator.