Which non-invasive diagnostic tool uses magnetic fields and radio waves to create images of the inside of the body?

Magnetic Resonance Imaging (MRI)

Raymond Damadian discovered in the 1970s that healthy and diseased tissues emit different magnetic resonance signals, laying the groundwork for MRI. In 1977, he created the first MRI scanner, nicknamed "Indomitable," marking a revolution in diagnostic medicine. Although initially met with skepticism, MRI has become an invaluable diagnostic tool, allowing for detailed images without invasive techniques. The contributions of Damadian, along with those of Paul Lauterbur and Sir Peter Mansfield (Nobel Prize 2003), have been crucial for the development and acceptance of MRI.