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Table 2-1.Radioimmunoassay 1. Pituitary gland/hypothalamus TRH, LH-RH, somatostatin, GH, ACTH, prolactin, TSH, LH, FSH, vasopression, melanocyte-stimulating hormone, oxytocin, encepharin, endorphin 2. Thyroid gland T3, free T3, T4, free T4, TBG, T3 uptake, thyroglobulin, anti-TSH receptor antibody, anti-thyroglobulin antibody, anti-peroxidase antibody 3. Parathyroid/bone metabolism PTH, calcitonin, osteocalcin, PTHrP, 25-OH-D3, 1-25 (OH2)D 4. Pancreas/digestive system Insulin, C-peptide, glucagon, gastrin, secretin, glycolic acid, vasoactive intestinal polypeptide (VIP), motilin, cholecystokinin/pancreaozymin (CCK/PZ), gastric inhibitory polypeptide (GIP) 5. gonad/placenta/adrenal gland Testosterone, free testosterone, 5-dihydro-testosterone, estradiol (E2), estron (E1), estriol (E3), progesterone, 17-hydroxy progesterone, HCG, b-HCG, a-HCG, HPL, estrogen receptor, sex hormone binding globulin (SHBG), androsterone, aldosterone, cortisol, dihydroxy-epialdosterone, corticosterone, 11-dioxy cortisol, metanephrine, androgen receptor, progesterone receptor 6. Renal and Renin-angiotensin Rennin, system human atrial natriuretic peptide, 1-microglobulin, 2-microglobulin, angiotensin II and II, bradykinin, albumin 7. Blood, hemopoiesis -thromboglobulin, ferritin, erythropoietin, Vitamin B12 , folic acid, unsaturated iron-binding capacity, (UIBC), total iron-binding capacity (TIBC) 8. Tumor marker AFP, CEA, TPA, SCC, CA125, CA130, PA, SP1, CA19-9, CA72-4, CA15-3, SPAN-1, SLX, STN, PAP, NSE, CA50, POA, BFP, DuPAN2 9. enzyme Pancreatic secretory trypsin inhibitor (PSTI), pancreatic phospholipase A2 (PLA2), deoxythymidine kinase, elastase, trypsin, pepsinogenI-II 10. pharmaceuticals digoxin, digitoxin, cyclosporin 11. viral antigen, antibody HBs antigen antibody, HBe antigen antibody, HBc antigen, antibody, IgM-HBc antibody, HA antigen, IgM-HA antibody, HBV-DNA, HCV antibody, HDV antibody, HPV-DNA 12. signal transduction Cyclic AMP, cyclic GMP, prostaglandin, thromboxane, leukotoruen, leukotriene, histamine 13. Immunoglobulin, allergen Non-specific IgE (RIST), specific IgE (RAST), IgG 14. cytokine Interferon-,-,-, Interleukin-1,-2,-3, G-CSF Table 2-2 Radiopharmaceuticals for Brain SPECT and PET Type of study Aim of study SPECT/PET tracer Principle of administration accumulation perfusion CBF SPECT distribution 123 I-IMP (MBq) Diffusion i.v. 167~222 Tc-HMPAO Chemical trapping i.v. 740 Tc-ECD Chemical trapping i.v. 740 Xe Diffusion Inhalation, i.v. 1850 99m 99m 133 Radioactivity (inhalation) Cisternography 111 Cerebrospinal In-DTPA lumbar 37~74 i.v. 74-111 Receptor bindng i.v. 167^222 C15O2 Diffusion Inhalation 1665~5550 H215O Diffusion i.v. 1110~1850 15 Diffusion inhalation 555~1110 fluid Tumor malignancy 201 TlCl Receptor Epileptic foci 123 I-iomazenil Blood flow Ischemia PET Oxygen Energy O2 metabolism failure Blood volume vasodilatation C15O Hb-CO inhalation 3700~5550 Glucose Neural 18 Metabolic trapping i.v. 185~222 metabolism activity F-FDG