Thyroid gland has the unique ability to concentrate iodine. Thisphenomenon offers a perfect background for a wide range ofdiagnostic tests utilizing radioactive iodine nuclides of iodineand technetium. Despite the very good availability of ultrasonographyand other imaging modalities, radionuclide methodsare still inevitable in a various cases of thyroid disease. In thisarticle, a comprehensive review of all these methods used inthe diagnosis of benign thyroid diseases is presented. Iodineand technetium uptake tests are briefly described. Indications tothyroid scan in the context of iodine supply are also presented.Finally, the significance of thyroid findings in PET images ispointed out. The article is illustrated by some typical patternsof radionuclide thyroid images.Thyroid gland has the unique ability to concentrate iodine. Thisphenomenon offers a perfect background for a wide range ofdiagnostic tests utilizing radioactive iodine nuclides of iodineand technetium. Despite the very good availability of ultrasonographyand other imaging modalities, radionuclide methodsare still inevitable in a various cases of thyroid disease. In thisarticle, a comprehensive review of all these methods used inthe diagnosis of benign thyroid diseases is presented. Iodineand technetium uptake tests are briefly described. Indications tothyroid scan in the context of iodine supply are also presented.Finally, the significance of thyroid findings in PET images ispointed out. The article is illustrated by some typical patternsof radionuclide thyroid images
