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High quality imaging without radiation can be achieved by magnetic resonance imaging (MRI). The powerful magnetic field of the tomograph makes the hydrogen atoms in the human body (which consists primarily of water) spin in the same rotation and a radiosignal makes them swing. The resulting response signals generate finely graded body-section images. As there is no radiation exposure, MRI can safely be used for pregnant women and children.
Depending on age and gender, the human body consists up of about two thirds water. The hydrogen atoms (protons of water) as well as the protons in the solid parts of the tissues are tiny magnets, whose characteristics are utilized to produce images in magnetic resonance imaging (MRI).
Patients are put into a very strong magnetic field (e.g. 1.5 Tesla, approximately 15,000 times stronger than the magnetic field of the earth), so that their protons are predominantly spinning in one direction. With the help of a radio signal, the protons are brought to vibrate, so that they release radio signals, which are measured by antennas (so-called coils, that are placed on the body in some of the examinations). These signals are computed into section images
MRIs are carried out without radiation and can thus be used without hesitation for children and pregnant women to answer specific questions. Occasionally, a contrast agent (Gadolinium) will have to be administered to differentiate between individual structures as well as between healthy and unhealthy tissue. Compared to the contrast agents used in computed tomography, there are significantly fewer undesireable side effects.
The Radiology Center offers the following examinations with MRI
– Brain, spinal marrow, skull, facial bones, paranasal sinuses
– Angiography (basilar arteries, carotid arteries, aorta, kidney arteries, pelvic and peripheral arteries
– Breast tissue (if needed, together with biopsy or marking)
– Liver, biliary tract, pancreas, kidneys, uterus, ovaries, prostate, intestines, spine and all joints
MRI targeted needle biopsies of the female breast under local anesthesia