Name one medical technique which is based on magnetism produced in human body. For what purpose is this technique used?

Magnetic Resonance Imaging (MRI) is the medical technique that is based on magnetism produced in the human body. It is used to get images of the internal parts of our body. 

Explanation

Magnetic resonance imaging (MRI) is a medical imaging technique that generates detailed images of the inside body by scanning in which powerful magnets, radio waves, and a computer are used.