Radionuclides

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Common Isotopes Used in Nuclear Medicine
isotope symbol Z T1/2 decay photons (keV)
Fluorine-18 18F 9 109.77 m β+ 511
Gallium-67 67Ga 31 3.26 d ec 93,185,300
Krypton-81m 81mKr 36 13.1 s IT 190
Rubidium-82 82Rb 37 1.27 m β+ 511
Technetium-99m 99mTc 43 6.01 h IT 140
Indium-111 111In 49 2.80 d ec 171, 245
Iodine-123 123I 53 13.3 h ec 159
Xenon-133 133Xe 54 5.24 d β- 81
Thallium-201 201Tl 81 3.04 d ec 69–83, 167
Yttrium-90 90Y 39 2.67 d β- -
Iodine-131 131I 53 8.02 d β- 364