Figure 10. Temporal representation of ¹⁸F-radiotracer localisation in a selected transabdominal plane passing through the liver after the injection of [¹⁸F]5-fluorouracil without eniluracil (A) and after eniluracil (B). Kindly reproduced with permission from: Saleem A, Yap J, Osman S, Brady F, Suttle B, Lucas SV, et al. Modulation of fluorouracil tissue pharmacokinetics by eniluracil: in-vivo imaging of drug action. Lancet 2000;355:2125–31.