Video narration
How can a machine see inside your body without opening you up? Think of a fridge magnet: its invisible pull acts without touching. An MRI uses a much stronger magnetic field. That field lines up tiny hydrogen particles in your body, especially the water you contain. Now the key turn: the scanner is not taking a normal photograph. It sends radio waves that briefly nudge those particles. As they settle back, they send tiny signals, and the machine listens. Different tissues send different patterns. A computer uses those signals to build a detailed picture of what is inside. Unlike X-rays, MRI uses no ionizing radiation. It can be loud, and you need to stay still, but the basic idea is simple. So how does MRI see inside you? A powerful magnetic field and radio waves create signals from your body, and the scanner turns them into an image.