What is MRI ?

MRI (magnetic resonance imaging) is a kind of medical equipment that has been used since the beginning of the 1980s. Doctors use it to examine and diagnose quite a number of illnesses and disorders.
The MRI scan uses powerful magnets, radio waves, and a computer to make detailed pictures inside your body, meaning that there is no exposure to X-rays or any other damaging forms of radiation.

Images form MRI is illustrates by magnetic force against atomic alignment of tissues. Normally, hydrogen atom, which composed in fluid and lipid, is randomly aligned.

We can make these atom to be aligned by magnetic force. Therefore, we can align atoms while the patient is proceeding MRI.

The atomic alignment is changed when activating with radio frequency and will return to normal state when the activation is stopped and release the signal which equals to activating-radio frequency. The released signal can be recorded and illustrated into organ’s image with computer system.

The tissues that have less hydrogen such as bones will be darkened while the tissues that have more hydrogen will be brightened. In conclusion, MRI is good to illustrated soft tissue and can illustrating blood vessels and biliary tract without contrast agent injection.