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. 2017 Nov 26;9:10–20. doi: 10.1016/j.pacs.2017.11.001

Fig. 2.

Fig. 2

LED beam characterizations of PLED-PAI system. A) Parallel lines were printed on transparency film and placed inside 1% agar. The distance between the lines is 2 mm. B) LED fluence per pulse versus pulse width for 690 and 850 nm. C) MIP image for sixteen parallel lines with a scan size of 10 mm. D) The line profile along the dotted line in C. E) Statistical analysis of each line and the averaged PA intensity along all sixteen lines. Error bars show standard deviation between different ROIs in each printed line. F) LED power stability (in different repetition rates) versus time when PLED-PAI is placed inside the water. G) LED power statistical parameters when PLED-PAI is in water for 500 s. H) LED power stability (in different repetition rates) versus time when PLED-PAI is placed inside the air. I) LED power statistical parameters for PLED-PAI in air for 200 s.