MRI MAGNETIC RESONANCE IMAGING (MRI)
MRI or Magnetic Resonance Imaging is a modern computerized method of scanning, creating images using a strong magnetic field and radio waves rather than x-rays to provide remarkably clear and detailed pictures of internal organs and tissues. The hydrogen atoms in the patient's body react to the magnetic field and emit signals which are analyzed by a computer to produce images. The images obtained help in detecting various abnormalities in the tissues scanned.
The technique has proven very valuable for the diagnosis of a broad range of conditions in all parts of the body, including cancer, heart and vascular disease, stroke, brain tumors and certain chronic disorders such as multiple sclerosis, diseases of the eye and inner ear, spine, joint and musculoskeletal disorders. MRI is growing in popularity as an alternative to traditional x-ray mammography in the early diagnosis of breast cancer. Because no radiation exposure is involved, MRI is often the preferred diagnostic tool for examination of the male and female reproductive systems, pelvis and hips, and the bladder.
The conventional MRI unit is a closed cylindrical magnet in which the patient must lie totally still for several seconds at a time, and consequently may feel "closed-in" or truly claustrophobic. However, new "patient-friendly" designs are rapidly coming into routine use.
The "short-bore" systems are wider and shorter and do not fully enclose the patient. Some newer units are open on all sides, however the image quality may vary.