proton density


Creation of images


Placing patient into a strong magnetic field

- 30 000 x stronger than the earth's magnetic field


Stronger magnets, better images, shorter times

- 1.5 Tesla 

- 3 Telsa


The nuclei of elements with odd numbers of protons line up

- i.e. hydrogen atoms

- hydrogen is plentiful in fat and water


A radiofrequency is then applied, exciting the protons