MRI
MRI Magnetic resonance imaging is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body in both health and disease. MRI scanners use strong magnetic fields, radio waves, and field gradients to generate images of the organs in the body. MRI does not involve x-rays, which distinguishes it from computed tomography . While the hazards of x-rays are now well-controlled in most medical contexts, MRI still may be seen as superior to CT in this regard. MRI often may yield different diagnostic information compared with CT. There may be risks and discomfort associated with MRI scans. Compared with CT, MRI scans typically take greater time, are louder, and usually require that the subject go into a narrow, confined tube. In addition, people with some medical implants or other non-removable metal inside the body may be unable to undergo an MRI examination safely. MRI is based upon the science of nuclear magnetic resonance .