Magnetic Resonance Imaging (MRI): What it detects and when it is indicated

Magnetic Resonance Imaging (MRI) is a non-invasive diagnostic imaging test that uses magnetic fields and radiofrequency waves (without emitting radiation) to produce detailed, high-definition 3D images of the inside of the body.

An MRI is necessary when soft tissues—such as the brain, ligaments, muscles, spinal cord, or abdominal organs—need to be examined with maximum precision. It can detect everything from sports injuries (such as torn menisci or ligaments) to herniated discs, tumors, strokes, or inflammatory conditions at very early stages.

What does an MRI detect?

Thanks to its high anatomical resolution, it is the method of choice for evaluating multiple areas of the body:

• Nervous System (Brain and Spine): Detects brain lesions, stroke, multiple sclerosis, tumors, aneurysms, and spinal conditions such as herniated discs or nerve compression.
• Musculoskeletal System (Joints): The gold standard for diagnosing torn ligaments, meniscus injuries, tendinitis, cartilage wear, or occult fractures in knees, shoulders, ankles, and hips.
• Abdominal and Pelvic Area: Evaluates organs such as the liver, pancreas, kidneys, uterus, and prostate, helping characterize cysts, tumors, or endometriosis.
• Cardiovascular System: Assesses the structure and function of the heart and blood vessels (magnetic resonance angiography / MRA).

When is an MRI performed and when is it indicated?

Determining when an MRI is needed always depends on a specialist’s clinical assessment. It is generally indicated in the following scenarios:

1. Persistent symptoms without a clear diagnosis: Ongoing joint pain, recurrent headaches, dizziness, numbness in limbs, or lower back pain that does not respond to medication.
2. Pre-treatment or surgical planning: Helping the orthopedic specialist or surgeon assess the exact anatomy of the injury before operating.
3. Monitoring known conditions: Evaluating the progress of an injury, tumor, or chronic disease.
4. Radiation-free alternative: Because it does not use X-rays, it is the ideal choice for patients requiring frequent scans or whenever ionizing radiation should be avoided (such as in younger patients or regular check-ups).

What happens during an MRI? Step-by-step

Knowing what to expect during an MRI helps you approach the exam with total confidence and peace of mind:

1. Preparation: You will be asked to remove all metal objects (jewelry, watches, belts) and, in some cases, change into a hospital gown.
2. Entering the room: You will lie down on a padded scanning table. If the examination requires a contrast agent (gadolinium) to highlight specific tissues, the nurse will place an IV line in your arm.
3. During the scan: The table will glide smoothly inside the scanner. You will hear rhythmic knocking or tapping sounds (caused by the magnetic fields). We will provide headphones with music to dampen the noise, and you will remain in constant communication with the technician via an intercom.
4. Duration: The test usually takes between 20 and 45 minutes, during which you only need to remain relaxed and still.

Prone to claustrophobia? At CreuBlanca, we provide 3-Tesla wide-bore MRI scanners and Open MRI systems, specifically designed to offer an open-air sensation and alleviate anxiety.

When should you see a specialist?

If you have recurring symptoms (such as back pain, knee discomfort when walking, or migraines) and do not yet know the cause, the first step is not to book an imaging test directly, but to see the right specialist (orthopedic surgeon, neurologist, etc.).

At CreuBlanca, we ensure complete continuity of care: our specialists assess your symptoms in consultation, prescribe the most appropriate MRI scan if needed, and determine your treatment plan once the results are ready—all within our unified medical network.

Your High-Definition MRI in Barcelona and Maresme

Do you need an MRI scan quickly and with maximum diagnostic accuracy?

At CreuBlanca, we are leaders in diagnostic imaging. We offer high-definition 3-Tesla MRI technology and open scanner options for claustrophobic patients at our primary centers: Clínica CreuBlanca Barcelona and Hospital CreuBlanca Maresme (as well as across our healthcare network).

A specialized team of expert radiologists will interpret your scan to deliver your medical report promptly. You can attend as a private patient or through your health insurance, as we partner with over 30 providers.

Book your MRI appointment here.