There are some restrictions and contraindications that your doctor will let you know. You can read briefly about these restrictions and contraindications below. You can also read about the benefits of an MRI.
There are a number of contraindications for diagnosis, which include absolute contraindications, where diagnosis is not possible and relative, in which examination is possible under certain conditions.
- Absolute contraindications for MRI testing
- installed pacemaker (changes in magnetic field can simulate heart rate).
- ferromagnetic or electronic middle ear implants.
- large metal implants, ferromagnetic fragments.
- ferromagnetic devices Ilizarov
- Relative contraindications
- insulin pumps
- nerve stimulants
- non-ferromagnetic inner ear implants,
- cardiac valve prostheses (in high fields, if dysfunction is suspected)
- hemostatic clips (except for brain vessels),
- decompensated heart failure,
- the first trimester of pregnancy (insufficient evidence has been collected so far to prove the absence of a teratogenic magnetic field effect, but the method is preferable to X-ray and CT scan)
- claustrophobia (panic attacks while in the tunnel of the device may not allow the study)
- need for physiological monitoring
- patient inadequacy
- severe/emerging illness
MRI is also contraindicated (or the examination time should be significantly reduced) for tattoos that are made with metallic ink. Titanium itself is not a ferromagnetic and is almost safe on MRI; the exception is tattoos made with paints that contain titanium compounds (e.g. based on titanium dioxide).
The MRI magnetic field may attract metal objects. Both clients and doctors who are in a room with an MRI may be affected by metal objects that move in the magnetic field. This is why any iron-containing objects (keys, piercing, hearing aids, prostheses, coins, jewelry, etc.) should remain outside the room with the CT scanner.
In the area of magnetic resonance imaging also can not bring disks, magnetic and credit cards, flash memory cards, mobile phones.
During pregnancy in practice, no harmful or dangerous effects of magnetic fields on pregnancy and the fetus was found, but still, since each organism reacts differently to some things, including diagnosis, then do not rush to conduct this examination during pregnancy. MRI diagnostics during pregnancy can be made if there are any fetal anomalies, or if there is a suspicion of serious illness. MRI is contraindicated during pregnancy.
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Patients with claustrophobia (fear of enclosed spaces) should not be diagnosed with an MRI. Panic attacks while in a tunnel may prevent a study from being carried out.
Patients who are afraid of enclosed spaces (suffering from claustrophobia) should not be MRI-examined, because the attacks that may occur in the tunnel of the device will not allow diagnosis.
It is also necessary to know that only when examining small pelvic organs, the bladder should be as full as possible, but not when diagnosing other organs or areas.
Women and girls should remember that when examining the head, make-up elements may reduce image quality or the value of diagnosis. Therefore, women are advised not to make up before the examination.
Children under five may need anesthesia. This is explained by the fact that at this age, the child behaves unstable, and this can harm the quality. This should be discussed with the anaesthesiologist before the examination.
Menstruation, the presence of an intrauterine device, including breastfeeding, are not contraindications for diagnosis.
The final decision as to whether or not to perform an MRI examination is made by the doctor immediately before the examination.