What is a radiopharmaceutical? A radiopharmaceutical is a compound consisting of a radioactive isotope attached to a biologically active molecule, designed to target specific tissues or physiological processes within the body. A radiopharmaceutical combines a radionuclide with a biologically active…
What is alpha decay? Alpha decay is a type of radioactive decay in which an unstable nucleus emits an alpha particle, consisting of two protons and two neutrons. This alpha particle is essentially a helium-4 nucleus. Alpha decay involves emission…
What is molybdenum breakthrough in a Tc-99m generator? Molybdenum breakthrough refers to the presence of molybdenum-99 (Mo-99) in the Tc-99m eluate from a radionuclide generator. Ideally, Mo-99 remains bound to the alumina column within the generator, while only Tc-99m is…
What is aluminium breakthrough in a Tc-99m generator? Aluminium breakthrough refers to the presence of aluminium ions in the Tc-99m eluate as a result of leaching from the alumina column inside the generator. In a Tc-99m generator, molybdenum-99 is adsorbed…
What is specific activity in nuclear medicine? Specific activity refers to the amount of radioactivity per unit mass of a radionuclide. It describes how much activity is present relative to the total quantity of that element. High specific activity means…
What is radiochemical purity? Radiochemical purity refers to the proportion of a radionuclide that is present in the desired chemical form. Even if the correct radionuclide is present (high radionuclidic purity), it may exist in multiple chemical species, not all…
What is radionuclidic purity? Radionuclidic purity refers to the proportion of the total radioactivity present in a preparation that comes from the desired radionuclide. It describes whether unwanted radioactive isotopes are present. In a Tc-99m generator eluate, radionuclidic purity means…
What is a radionuclide generator? A radionuclide generator is a device that allows a short-lived daughter radionuclide to be obtained from a longer-lived parent radionuclide. It acts as a portable source of radioactive material, enabling repeated extraction of the daughter…
How are radionuclides produced in a cyclotron? Radionuclides are produced in a cyclotron by accelerating charged particles, usually protons, to high energies and directing them at a stable target nucleus. The collision induces a nuclear reaction that transforms the target…
How are radionuclides produced in a nuclear reactor? Radionuclides are produced in a nuclear reactor primarily by neutron capture or nuclear fission. In neutron capture, a stable target nucleus absorbs a neutron and becomes radioactive. In fission production, heavy nuclei…