Specific and Non-Specific Uptake in Quantitative 89Zr-Immuno-PET.

TO THE EDITOR: In a recent review, van Dongen et al. illustrated why 89Zr-immuno-PET has become an important tool for the in vivo characterization of novel biologic drugs and their targets ([1][1]). A technical “State of the Art” article summarized PET quantification of 89Zr-tracer uptake,