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Fusion PET-CT-Real images of the rat’s head. Tacrolimus eye drops remain on the ocular surface after instillation (a,b) subsequently observed as it is eliminated by the nasolacrimal ducts (c,d). Axial (a) and sagittal (b) PET image and fusion PET-real images (10 min). Axial (c) fusion PET-CT image and Sagittal (d) fusion PET-real images (90 min post-administration). Reproduced with permission from [32], published by Elsevier, 2018.
