The thyroid gland is not only one of the most important components of the body, but is also considered one of the most complex. Therefore, the most modern technologies are used to diagnose diseases or possible areas of damage. This is not to say that they are all absolutely safe for the health of the body as a whole, but the potential danger of developing pathologies is much worse for the patient.Procedures such as breast scintigraphy are necessary for many patients who have been diagnosed with thyroid disorders. This procedure, although, according to experts, is considered safe, as a result it can lead to unexpected consequences. The human body is conservative and any interference with its work from the outside can cause negative consequences, therefore, agreeing to scintigraphy, you need to be sure that it is really necessary.Thyroid scintigraphy is the introduction of a certain amount of radioactive isotopes into human blood, most often I123, I131, and T99 (technetium). Even a person who is far from medicine understands that exposure, albeit temporary, to radiation can be dangerous for humans. But this procedure is not prescribed to everyone. Its expediency arises when the possible harm from it is much less than the harm that a diseased gland can cause. Moreover, in order for specialists to come to the need for scintigraphy, several factors are necessary: the presence of signs of an autoimmune process, serious changes in thyroid hormones. Ultrasound and echoscopy are usually sufficient for diagnosis, but it also happens that this is not enough to prescribe more effective treatment.What is scintigraphy?The essence of the procedure is to identify areas of disorders in the thyroid gland itself with the help of the provocative actions of the injected substances. Radioactive iodine, entering the bloodstream, begins to accumulate rapidly and, according to the foci of its absorption into the thyroid tissue, the computer makes up a clinical picture of the changes. It also allows you to see not only the pathology itself, but also the affected areas of the diseased gland. These zones are conventionally divided into "cold" and "hot" nodes: in the first zone, hormones are almost not produced or their level is unacceptably low, while in the second zone there are many of them and their production is increased. Normally, in a healthy thyroid gland, all processes occur evenly in both lobes, the density and volume are also the same. But with violations, even minor ones, all indicators change. This is usually due to an imbalance of iodine in the body or due to heredity. Scintigraphy is able to detect cyst formation and malignant tumors at an early stage. The procedure can be prescribed twice if a person has been on hormone treatment for a long time: first, one procedure is performed to fix the thyroid function at the current moment, in the active phase of the disease.A repeat procedure is prescribed two months later to find out the main point: which areas of the gland have become more active, what has changed after treatment, and which areas still need treatment. Some specialists may prescribe scintigraphy earlier, but this is impractical for one reason: hormone-containing drugs are not eliminated from the body as quickly, and it is difficult to see a "clean" picture in such conditions. The main purpose of the repeat procedure is to see which thyroid tissues are already independent and can cope with the work without the constant support of artificially injected hormones.Sometimes it turns out that scintigraphy is not enough for an accurate diagnosis. In this case, the person is referred for a magnetic resonance procedure. In some cases, nuclear magnetic resonance can replace scintigraphy if it is the safest for the patient. But more often these two procedures complement each other in order to create a complete clinical picture.Of course, thyroid scintigraphy is not a common procedure and is not cheap. Usually, such powerful equipment is available in good oncology centers or in modern private clinics. But if you understand that thyroid disorders can easily kill a person, there will be no desire to save money. In most cases, such procedures can be avoided if you carefully monitor the functioning of the thyroid gland, regularly visit an endocrinologist and undergo the necessary examination. It is also important not to interfere with the endocrine system on your own, for example, by excessive use of iodine-containing drugs. Even if there is a lack of iodine and there is an appropriate diagnosis, it is necessary to take strictly only those medications prescribed by a specialist. 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