Fig. 8. (A) Representative non-invasive NIR-II fluorescence images (1250 nm LP, 200 ms, 808 nm excitation, 180 mW cm–2) of the gastrointestinal tract in BALB/c mice gavaged with the HLZ-BTED dots (0.1 mL, 5 mg kg–1) for visualizing intestinal obstruction (n = 3 mice). (B) Ex vivo NIR-II image (200 ms, 1250 nm LP) of the GI tract in normal mice or mice with intestinal obstruction at 5 h after gavage. (C) Representative ex vivo NIR-II fluorescence image (1250 nm LP, 200 ms) of the GI tract in BALB/c mice which are normal or anesthetized by pentobarbital sodium at 2 h after gavage. Scale bar: 1 cm.
