In vivo CT imaging: (A) Representative 3D CT image reconstructions of 3 nm GSH-coated Ag2Te NPs injected mice at pre- and 5, 30, 60, and 120 min post-injection. Window width (WW): 630 HU and window level (WL): 680 HU. Inset: 3D reconstruction magnification in the kidney region. WW: 429 HU and WL: 537 HU. (B) Quantification of the CT attenuation in the different organs of mice injected with GSH-Ag2Te NPs at different time points (5, 30, 60, 120 min post-injection). n = 5 per group. Data are presented as mean ± SEM. ****p < 0.0001.