Linked from
The 7 pages that link to Radiotracer, each with the reason it gives.
Nuclear medicineRelated: Radiotracers reveal where a compound travels and how tissues handle it.
NuclideRelated: A nuclide's detectable emissions can reveal where its atoms travel.
TritiumRelated: Tritium labels compounds so their transport and reaction can be measured.
RadionuclideRelated: Radionuclides can mark molecules so their paths can be measured.