Radioisotopes are widely used in medicine, industry and scientific research, and new applications for their use are constantly being developed.Radioisotopes are radioactive isotopes of an element.For example, iodine is metabolised by the thyroid, which makes iodine-123 useful for thyroid investigations.Gamma-emitting sources are the best isotopes to use for nuclear medicine. From left to right, the isotopes are protium ( Isotopes are variants of a particular chemical element which differ in neutron number. The fact that each isotope has one proton makes them all variants of hydrogen: the identity of the isotope is given by the number of neutrons. The term isotope is formed from the Greek roots isos (ἴσος "equal") and topos (τόπος "place"), meaning "the same place"; thus, the meaning behind the name is that different isotopes of a single element occupy the same position on the periodic table. All isotopes of a given element have the same number of protons in each atom.
The radioisotope chosen must also be able to label a compound to produce a suitable radiopharmaceutical that will be metabolised by the area of interest.
Atoms containing this unstable combination regain stability by shedding radioactive energy, hence the term radioisotope.
The process of shedding the excess radioactive energy is called radioactive decay.
I'm trying to give a patient a thyroid investigation and my colleague has suggested using radioisotopes.
What are the properties of radioisotopes that make them useful for medical diagnosis? - Matt (Apprentice) If the radioisotope remains in the patient's body for a long time after the scan, the half life must be long enough for a scan to be taken, but short enough that it will be mostly decayed shortly after the scan so that the patient does not remain radioactive.