Magnetic Resonance Imaging (MRI)

Magnetic Resonance Imaging

Nuclear Magnetic Resonance Imaging (NMRI) is a radiological test that was developed in the 1980s. This is a harmless technique that gathers images of the body using non-ionizing radiation on any spatial plane.

It distinguishes different anatomical structures better than any other radiological test. Paramagnetic contrasts, such as gadolinium, can be added to define the structures and parts of the body even more.

Images are obtained by stimulating the body through a powerful magnetic field with a magnet of 0.2 to 3 Tesla (equivalent to 15 thousand times the Earth's magnetic field). This magnet attracts the protons contained in the tissue atoms, which align with the magnetic field.

In Magnetic Resonance Imaging, the images are produced on three cross sections: axial, coronal and sagittal, without the need to change the patient's position. A MRI study allows for seeing the white tissues much better than conventional X-rays.

How the test is performed

The NMRI machine is isolated in a room from all types of exterior magnetic fields.

Patients lie down on the bed, which slides between the magnetic poles that generate the magnetic field around the patient. The device emits radio frequency waves directed at the tissues under study to create images of the body. It is harmless and non-invasive for the patient.

In our Open Magnetic Resonance equipment (Siemens Concerto 0.2T), the patient does not enter a cylinder-shaped tube and therefore does not experience claustrophobia.

Every sequence requires 2 to 15 minutes to be completed. The overall time for this test could be between 30 and 60 minutes.

Photographs

Preparation and advice

You have to come for an MRI on an empty stomach (no food at least six- twelve hours prior), in some tests, the administration of a contrasting liquid is required, by prescription, to observe specific areas with greater detail.

A consent form accepting risks must be signed.

No metal objects should be worn (rings, necklaces, earrings, etc) on any part of the body, even removable dental appliances.

Patients must remain still during the test.

TYPES
  • Cranial NMRI
  • NMRI of the jaw and jaw bones
  • Spinal NMRI (cervical, thoracic/dorsal, lumbosacral)
  • NMRI of upper body limbs
  • Abdominal NMRI
  • NMRI of the pelvis/hip bones
  • NMRI of lower body limbs
  • NMRI of muscles and joints