A stroke occurs when the blood supply to the brain is interrupted or there is bleeding in the brain. Within minutes, brain cells begin to die. It is urgent to seek emergency care at the first sign of a stroke. Early treatment saves many lives and reduces the effects of stroke.
Quick Answer. The purpose of taking an MRI scan of the lumbar spine is to treat or better diagnose problems with the spine, explains WebMD. Patients may need an MRI scan if they show symptoms such as back pain accompanied by fever, birth defects affecting the spine, injury to the lower spine, and persistent or severe lower back pain.
Appointments & care. At Mayo Clinic, we take the time to listen, to find answers and to provide you the best care. Magnetic resonance imaging (MRI) is a technique that uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.Most MRI machines are large, tube-shaped magnets. When you lie inside an MRI machine, the magnetic field temporarily realigns hydrogen atoms in your body.Radio waves cause these aligned atoms to produce very faint signals, which are used to create cross-sectional MRI images â like slices in a loaf of bread.ost MRI machines are large, tube-shaped magnets. When you lie inside an MRI machine, the magnetic field temporarily realigns hydrogen atoms in your body. Radio waves cause these aligned atoms to produce very faint signals, which are used to create cross-sectional MRI images â like slices in a loaf of bread.