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.
Your body contains millions of hydrogen atoms. When you are in an MRI scanner: 1  A strong magnetic field aligns particles called protons which are within the hydrogen atoms. 2  All the protons line up in parallel to the magnetic field, like tiny magnets. ( 3 Normally the millions of protons all lie in random directions.).