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(a) Whole-body single-photon emission computed tomography (SPECT)/CT images of mice exposed to radiolabeled diesel exhaust particulates (125I-DEP) via intratracheal instillation. (b) Biological distribution of intratracheally instilled 125I-DEP. (c) Whole-body SPECT/CT images of mice after oral administration of 125I-DEP. Reprinted with permission from Lee et al. [45].
