thyroid gland scans: grey-scale imaging reveals homogeneous structure and subtle radioactive uptake in normal thyroid tissue and

thyroid gland scan medical imaging grey scale radioactive uptake thyroidocytes ultimobranchial bodies isthmus lobes homogeneous texture physiology endocrinology nuclear medicine diagnostic function metabolism morphology radiology radioisotope endocrinological hormones disorders healthy disease diagnostics clinical tracer biological anatomical structure ultrasound ct mri endocrine system biomedical tool science