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Magnetic Resonance Imaging (MRI)

Magnetic Resonance Imaging (MRI) is a non-invasive, highly accurate imaging exam that allows detailed visualisation of the organs, tissues and internal structures of the human body. It is a safe exam that does not use ionising radiation and is frequently used for the diagnosis and follow-up of various pathologies.

What is it?

Magnetic Resonance Imaging is a diagnostic imaging exam that uses magnetic fields and radiofrequency waves to produce high-resolution images of the inside of the body. The exam is performed in a safe, comfortable and painless way.

It allows the detailed study of organs, joints, blood vessels, muscles, soft tissues and the central nervous system, among other structures, without the use of radiation.

What is the price of an MRI?

At NRD, most MRI examinations cost €275 (private price), with some exceptions (Abdomino-pelvic MRI – €500, Uro MRI – €500, Angio MRI – €360 and MRCP – €305).

However, you can undergo the exam through several agreements, including:

  • ADSE (the user pays only the copayment, usually €30 or, in rare cases, €50), IASFA, ADM GNR, SAD PSP.
  • Insurance companies: Médis, Multicare, Advance Care, Allianz, Saúde Prime, Future HealthCare, SS CGD, SAMS Quadros, SAMS, Montepio, RNA, Generali, Mudum, MGEN, Aegon, Vitória, Una Seguros, among others. The price varies according to the insurance you use.
  • Health Plans: Medicare, Saúde Prime, Future HealthCare, Continente Wells, ACP and other health plans. The price varies according to the plan you use.
  • Protocols and special prices – NRD has protocols with several clinics and institutions that allow you to undergo the exam at very competitive prices. For MRI, this price is generally around €220, except for abdomino-pelvic MRI (€350), Uro MRI (€350) and Angio MRI (€275).

How is it done?

The patient is positioned on a table that slides into the MRI scanner, which is open at both ends. The area of the body to be examined is centred in a specific coil adjusted to the region under study.

Keeping still throughout the exam is essential to ensure image quality.

If necessary, an intravenous contrast agent (gadolinium-based) will be administered to highlight certain structures.

We will provide earplugs to reduce the perception of noise from the equipment.

MRI

What does it detect?

MRI can identify structural or functional changes in different systems and regions of the body, such as:

  • Tumours, nodules or masses;
  • Aneurysms, thrombosis or vascular malformations;
  • Inflammatory or infectious diseases;
  • Lesions of ligaments, tendons, muscles and joints;
  • Disc herniations and alterations of the spinal cord;
  • Neurological diseases such as stroke, multiple sclerosis or Alzheimer’s disease;
  • Abdominal, pelvic, breast, cardiac and other pathologies.

In which cases is it indicated?

MRI is indicated for the study of various clinical conditions, including for example:

  • Spinal pathologies (disc herniations, spinal cord changes, tumours, etc.);
  • Neurological diseases (Alzheimer’s, multiple sclerosis, stroke, brain tumours);
  • Musculoskeletal conditions (tendinitis, ligament tears, disc herniations, occult fractures);
  • Oncological pathologies (breast, prostate, liver, kidneys, bones, soft tissues);
  • Cardiac assessment (myocardial infarction, myocarditis, congenital heart disease);
  • Inflammatory bowel diseases (Crohn’s disease, ulcerative colitis);
  • Traumatic or degenerative lesions;
  • Study of internal organs (spleen, pancreas, uterus, ovaries, etc.);
  • Treatment monitoring;
  • Surgical planning;
  • Post-operative follow-up;
  • Among others.

Preparation and guidelines for MRI

Topic Guidance
Exam prescription (paper form) You must bring the exam prescription in paper form.
Fasting Most MRI exams do not require fasting. For exams with contrast, fasting for 3 hours is usually required (to be confirmed when booking).
Early arrival Please arrive 15 minutes before the scheduled time.
Medication You may take important and unavoidable medication with a minimum amount of water.
Metal objects Remove all metal objects (e.g. earrings, bracelets, necklaces, piercings, hairpins, removable prostheses, etc.).
Pregnancy Inform the NRD healthcare professional if you are pregnant.
Previous exams / Tests / Information Bring previous imaging exams, relevant clinical information and recent laboratory tests.
Glucose monitoring implant Do not place the implant, as it will have to be removed before the exam.
Make-up Do not wear make-up, as some products may interfere with the exam.
Valve and/or orthopaedic prostheses If you have valve and/or orthopaedic prostheses, bring documentation with the description and composition of the material.
Hearing aids Inform us if you use a hearing aid, as it will have to be removed before the exam.
Dental prostheses Inform us if you use a dental prosthesis, as it may need to be removed before the exam. Also inform us if you have dental implants.
Orthodontic appliances Inform us if you have orthodontic braces. A compatibility test may be necessary before MRI.
Pacemakers and implantable devices NRD does not perform MRI exams on patients with pacemakers or certain implantable devices (e.g. cochlear implants). In these cases, the exam should preferably be carried out in a hospital setting.

Throughout the entire MRI exam, you will be continuously monitored by the NRD imaging technologist responsible for your exam. An alert system will also be available for you to activate if needed.

You should remain still during the exam to ensure high-quality images.

The entire NRD team will be at your disposal to answer any questions you may have.

After the exam, you can return to your normal daily activities.

When and how do you receive the results?

You will receive the MRI report within up to 7 days after the exam, by e-mail or on paper at the clinic. On the day of the exam, you will take home a CD with the images.

Where can it be done?

MRI can be performed at NRD, at the following address:

Avenida Columbano Bordalo Pinheiro, nº 11-B, r/c, 1070-060 Lisbon

(Next to Praça de Espanha)

How long does an MRI take?

It depends on the area being examined, but the average MRI takes about 15 to 30 minutes.

Is MRI covered by the Portuguese National Health Service (SNS)?

No. MRI is not reimbursed/covered by the SNS.

Does MRI hurt?

No. MRI is completely painless.

Do I need to fast for an MRI?

Most MRI scans do not require fasting. If contrast is needed, you are usually asked to fast for about 3 hours (this will be confirmed at booking).

Is MRI dangerous? What are the risks?

MRI is a safe exam and does not use ionizing radiation. For most people there are no risks. If contrast is used, mild allergic reactions are very rare, and contrast is avoided in people with severe kidney failure. Metal objects or implants may be unsafe (see contraindications).

What are the contraindications for MRI?

O poderoso campo magnético usado na ressonância magnética atrai objetos contendo ferro e pode levá-los a mover-se com grande força. 

Objetos metálicos implantados no corpo podem representar um perigo, porque eles podem mover-se ou aquecer durante a ressonância magnética. Algumas condições são frequentemente contraindicações para a ressonância magnética. Assim, se for portador dos seguintes dispositivos / materiais, deverá comunicá-lo antes de realizar o exame:

  • Pacemakers ou dispositivos implantados: Pacemakers ou desfibriladores cardíacos, clipes de aneurismas ferromagnéticos, eletrodos usados ​​na estimulação cerebral profunda, implantes cocleares, válvulas cardíacas mecânicas, entre outros dispositivos metálicos;
  • Corpos estranhos metálicos: Estilhaços ou outros objetos metálicos no corpo podem ser aquecidos e/ou movidos pelo campo magnético. Devem, por isso, ser avaliados para determinar o risco de lesão durante o procedimento. Isso inclui quaisquer fragmentos de metal minúsculos ou fragmentos que possam ter se alojado no olho como resultado de solda, trituração ou qualquer tipo de acidente.
  • Algumas variedades de implantes oculares representam um risco de danos aos olhos devido a componentes metálicos.

Outras situações que podem contraindicar a realização deste exame:

  • Alergia conhecida ao gadolínio (se for utilizado contraste);
  • Insuficiência renal grave (em caso de contraste);
  • Gravidez;
  • Dispositivos de infusão de medicamentos podem funcionar mal durante a ressonância magnética. Os detalhes do seu modelo específico determinarão se e como você pode passar com segurança pela ressonância magnética.
  • De acordo com a Food & Drug Administration (FDA), órgão regulador de saúde dos EUA, alguns adesivos e eletrodos usados em eletrocardiogramas (ECG) podem causar queimaduras na pele durante a ressonância magnética.

Esta lista não especifica detalhadamente todas as possíveis contraindicações da ressonância magnética. Discuta qualquer uma das suas preocupações antes do exame com o profissional de saúde que o irá acompanhar.

Can I have an MRI if I am pregnant?

MRI is generally avoided during pregnancy unless clinically urgent. If it is necessary, it is usually done only after 12 weeks of gestation.

Are all MRI exams performed with contrast?

No. Many MRI exams are done without contrast. Contrast is only used when it adds diagnostic value, and the radiologist decides based on your clinical indication.

Do I need any special care after the exam?

No special care is required. You may resume normal activities. If contrast was used, drink plenty of water afterwards to help eliminate it.