MRI machines operate by exploiting the magnetic properties of hydrogen atoms, which are abundant in the human body due to their presence in water and fat molecules. When a person is placed inside an MRI scanner, the magnetic field aligns the hydrogen nuclei. Radiofrequency pulses are then applied, temporarily disrupting this alignment. As the nuclei return to their original state, they emit signals that are detected and used to create images. This process is non-invasive and does not involve ionizing radiation, making it safe for repeated use.
