Magnetic Resonance Imaging or MRI was called Nuclear Magnetic Resonance Imaging nearly 15 years back, but the word Nuclear was removed as people began to think that something radioactive was involved in it, however, it wasn’t so.

With this kind of imaging, the images of the different parts of the body are taken without using x-rays that are commonly use in CAT scans and other regular x-rays. In this kind of scanner the patient has to lie in a very strong and large MRI scanner. There is also a radio wave antenna that is used to deliver signals towards the body and then receive these signals back. There is a computer attached to this scanner which converts these returning signals into pictures. The images of almost any part of the body can be taken from any specific angle.

In a large number of patients MRI has proved quite safe, but there are some patients who cannot undergo an MRI and these people include heart patients with pacemaker in their heart, patients with inner ear implants and claustrophobic. People who have pieces of metal closed to their important organs like eyes cannot be scanned. Similarly, there are some other safety considerations and personal circumstances also play an important role to get additional safety.

Some objects that people usually keep with themselves including credit cards, pens, watches and cell phones can be damaging for the MRI scanner. These objects are often taken before going into MRI scanner. The patients are repeatedly asked to remove these goods before going into MRI scanner.

In this kind of scanning the patient has to lie on a specific kind of table that moves around the magnet and the patients are offered earplugs to decrease the intensity of voice they hear during this process.

Source: wikipedia.org

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