Paul Lauterbur (May 6, 1929 – March 27, 2007) was an American chemist known for his pioneering work in magnetic resonance imaging (MRI). He invented a method using gradient magnetic fields to spatially encode NMR signals, laying the foundation for MRI technology. Lauterbur shared the 2003 Nobel Prize in Physiology or Medicine with Peter Mansfield for their contributions to medical imaging. Born in Sidney, Ohio, he studied at Case Western Reserve University and earned his Ph.D. from the University of Pittsburgh. He spent most of his career at the University of Illinois at Urbana-Champaign. His work revolutionized medical diagnostics, enabling non-invasive, high-resolution imaging of internal organs. Lauterbur's legacy continues to save millions of lives worldwide.