radioisotope

noun 0.717

radionuclide

noun 0.642

isotope

noun 0.630

radionucleotide

noun 0.627

radiopharmaceutical

noun 0.618

radioiodine

noun 0.617

iodine-125

noun 0.607

radioactive tracer

noun 0.605

radiotracer

noun 0.599

medical

noun 0.599

radiocolloid

noun 0.583

radioactive

noun 0.576

nuclide

noun 0.557

radiochemical

noun 0.554

isotope dilution

noun 0.548

radiological weapon

noun 0.547

monoisotopic

noun 0.546

ionizing radiation

noun 0.541

isotopomer

noun 0.539

sealed source

noun 0.536

technetium

noun 0.534

caesium-137

noun 0.533

radiopharmacy

noun 0.531

medicinal

noun 0.523

radioligand

noun 0.520

americium

noun 0.515

radium

noun 0.513

radiolabel

noun 0.512

nanomedicine

noun 0.511

isotope shift

noun 0.511

radioactive waste

noun 0.509

radioimmunotherapy

noun 0.504

tetrofosmin

noun 0.504

isodose

noun 0.503

radiocesium

noun 0.503

radiotherapist

noun 0.502

radiotoxicity

noun 0.500