MRI is the abbreviation of the phrase - Magnetic Resonance Imaging, which uses strong magnetic fields and radio waves to scan the inside of human bodies e.g. organs, bones, tissue and etc.

The MRI scanner was not available until the 1970s although the theory of MRI was discovered about 30 years before that. So, it took scientists over 30 years to turn the theory into practice.

The human body mainly consists of water molecules which are composed of hydrogen and oxygen atoms. There is a proton at the centre of every hydrogen atom. The porton is a very small particle and very sensitive to magnetic fields.

When lying inside an MRI scanner, the powerful magnets will pull all the protons in your body towards the same direction. Radio signals will then be sent by the scanner to the areas that ‘snap’ the protons out of position. And the radio signal will be transmitted by protons to provide their exact locations. All the radio signals transmitted by protons are combined together to create a detailed image of the internal organ, tissue and etc, so the doctor can diagnose the health conditions.