Background: This research aims to investigate the effect of changing the order of the colors by conducting 12 sequences of light exposure in red, green, or blue colors.
Methods: Human-related material was not included. An Arduino-based experimental tool was developed with a 3D-printed light-tight platform. The photostimulable phosphor (PSP) plates were irradiated using the same parameters and metallic coins as contrast material. The plates were exposed to red, green, and blue colors, with variable color order and time intervals (20 seconds, 1 second, 100 milliseconds, 10 milliseconds). The total delay before scanning and total light exposure time was fixed, 12 sequences were conducted, and each experiment was repeated twice. Resulting radiographs were imported to ImageJ software and signal-to-noise (SNR) and contrast-tonoise (CNR) values were calculated by combining the ROIs dedicated for each contrast region.
Results: SNR values were found in the range of 128.6-155.6, while CNR values were found between 63.2 and 74.7. The second experiment (R-B-G, 20 seconds) resulted in the lowest SNR (128.6) and CNR (63.2) values. In contrast, the twelfth experiment (R-B-G, 10 milliseconds) resulted in the highest SNR (155.6) and CNR (74.7) values. For 20 seconds, administration of the red color first resulted in greater signal loss than green and blue colors.
Conclusion: Results of this experiment suggest that, despite the total delay and light exposure being the same, changing color order and time interval affected the resulting signal. Testing this phenomenon with different PSP systems or investigating the logic behind it may be the subject of future studies.
Cite this article as: Amasya H, Orhan K. Exposure of photostimulable phosphor plates with red, blue, and green light: comparing multiple sequences before scanning. Essent Dent. 2024;3(3):94-99.