DOUGLAS FARMER, SENIOR EDITOR [email protected]NOTRE DAME, Ind., June 15, 2020 — Fluorescence imaging has been a boon to research and medicine because of its ability to examine affected areas noninvasively. But the dyes used for these purposes have their disadvantages, and as resolution needs have grown stronger, the stakes for accuracy have increased exponentially. A tumor-burdened mouse, imaged with the aid of s775z dye. Courtesy of Cynthia Schreiber. 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