Magnetic resonance imaging (MRI), also known as a nuclear magnetic resonance imaging (NMR), is an imaging exam capable of showing the internal structures of the organs with definition, being important for diagnosing various health problems, such as aneurysms, tumors, joint abnormalities or other injuries to the internal organs.
A large machine is used to perform the exam, which creates high-definition images of internal organs by using a magnetic field, causing the body’s molecules to shake, capture them by the device, and transfer them to a computer. The test lasts between 15 and 30 minutes and usually no preparation is necessary, although it may be necessary to use a contrast product, in some cases, injecting the drug into the vein.
MRI is indicated in the following cases
It is necessary to take some precautions before performing this exam, as there may not be any metal material near the magnetic field of the device, such as forks, glasses or details of the clothing, thus avoiding accidents. For the same reason, this test is contrary for people who have implanted in the body some type of prosthetics, pacemakers or metal pegs.
In addition to the good quality of MRI images, another advantage is the non-use of ionizing radiation to obtain the results, unlike CT scans. Understand what it’s for and when a CT scan is needed.
MRI usually lasts between 15 and 30 minutes and can last up to 2 hours, depending on the area to be examined. For its performance it is necessary to remain inside the device that emits the magnetic field, and this does not hurt, however, it is very important not to move during this period, because any movement can alter the quality of the exam.
In people who cannot stand still, such as children, people with claustrophobia, dementia or schizophrenia, for example, sedation testing may be necessary to induce sleep, otherwise the test may not be effective.
In addition, in some cases it may be necessary to apply a contrast to the patient’s vein, such as gallium, as it is a way to induce a greater definition of images, mainly to visualize organs or blood vessels.
Types of MRI depend on the affected site, the most common include
MRI is therefore an excellent examination for the observation of soft parts of the body, however, it is generally not appropriate to observe lesions in rigid areas, such as bones, being, in these cases, tests such as x-rays or ct scans more. Indicated. Like what.