Raymond Damadian was a physician-scientist at SUNY Downstate Medical Center in Brooklyn when he published a 1971 paper in Science showing that cancerous tissue in rats had distinctly longer nuclear magnetic resonance relaxation times than healthy tissue. NMR had existed since the 1940s as a chemistry tool for identifying molecules in test tubes. Damadian's leap was audacious: if malignant tissue has a distinct NMR signature, a large-enough magnet could scan a living patient and see the tumor.

He filed US Patent 3,789,832, "Apparatus and Method for Detecting Cancer in Tissue," on March 17, 1972. It was granted February 5, 1974. The patent described a whole-body scanner: a superconducting magnet large enough to hold a person, radiofrequency coils to excite the hydrogen protons in tissue, and a detection scheme that measured T1 and T2 relaxation values point-by-point across the body. The claims were sweeping — they covered the use of NMR to image and diagnose disease in a living human, full stop.

The patent was mostly ideas. Damadian and two graduate students, Larry Minkoff and Michael Goldsmith, actually built the machine in a Downstate basement. They called it Indomitable. On July 3, 1977, after roughly five hours of scanning, Minkoff climbed inside and produced the first MRI image of a live human — a coarse cross-section of his chest. Indomitable now sits in the Smithsonian.

Damadian's method — moving the patient through a single sensitive "focus" point at a time — was slow and was quickly superseded. Paul Lauterbur (1973) and Peter Mansfield (1977) worked out how to use magnetic-field gradients and Fourier reconstruction to build up images vastly faster. Every modern MRI runs on their math, not Damadian's focusing. But Damadian's patent covered the founding idea. Fonar, the company he founded, won a $128.7 million patent-infringement judgment against General Electric in 1997 — one of the largest medical-device verdicts in history.

Modern relevance is nearly total:

• Roughly 40,000 MRI scanners worldwide perform on the order of 100 million scans a year.
• Functional MRI, invented in 1990, mapped the working brain and launched modern cognitive neuroscience.
• 7-tesla and 10.5-tesla research scanners now resolve individual cortical layers.
• Portable low-field MRIs from Hyperfine roll bedside in ICUs.
• Diffusion-tensor imaging traces neural fiber tracts non-invasively.
• Machine-learning reconstruction turns 10-minute scans into 90-second ones on existing hardware.

The 2003 Nobel Prize in Physiology or Medicine went to Lauterbur and Mansfield. Damadian was excluded — widely read as the committee's judgment that reconstruction mathematics mattered more than clinical vision. Damadian responded by taking out full-page ads in The New York Times, Washington Post, and Los Angeles Times headlined "The Shameful Wrong That Must Be Righted." He held the founding patent and had produced the first human MRI image. Whether that outweighs the math is now a permanent argument in the history of medicine.

Damadian died in 2022. His patent, US 3,789,832, remains the origin document of a roughly $8-billion-a-year industry that peers inside almost every organ, joint, and brain in modern practice — all riding on an effect physicists discovered in 1938 while measuring the magnetic moments of atomic nuclei in molecular beams.