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.
MRI (magnetic resonance imaging) is a noninvasive diagnostic test that takes detailed images of the soft tissues of the body. Unlike X-rays or CT, images are created by using a magnetic field, radio waves, and a computer.ontrast agent: a liquid (usually iodine or gadolinium) that is injected into your body to make certain tissues show up clearly during diagnostic imaging. gadolinium: a type of contrast agent used during MRI. radiofrequency: radiation used in MRI whose waves are in the frequency range of 300 MHz to 3 kHz.