But a PET Scan (Positron Emission Tomography) is different. It doesn't just show the house; it shows the lights turning on, the heater running, and the activity in the kitchen. It is a living picture of your body’s metabolism.

By using a tiny amount of radioactive tracer, a PET scan tracks where your body is consuming energy in real-time. It allows doctors to see disease (like cancer, heart disease, or brain disorders) not just as a physical lump, but as a biochemical process in motion.

In the 1970s, a team wove together successive breakthroughs to produce the first modern PET scan.

Today, over 2 million scans a year in the U.S. provide the critical data needed to inform lifesaving treatments.

A team from St. Louis produced the first functional images of living human brain metabolism at Mass General.

Decades in the Making
The PET scan braided together breakthroughs of the last several decades from across America.
The Tracer (1930s–1970s)
Building on the 1930s work of Ernest Lawrence (cyclotron), chemists like Alfred Wolf and Tatsuo Ido at Brookhaven National Laboratory developed a radioactive sugar, perfecting FDG in 1976.
The Detector (1950s–1960s)
In the late 1950s, Hal Anger invented the scintillation camera, a detector to be sensitive enough to catch the faint pings of energy released by radioactive sugars when positrons collide with electrons inside the body.
The Algorithm (1972–1973)
Allan Cormack (Tufts) and Godfrey Hounsfield developed the reconstruction techniques for CT scans in the early 70s. The PET pioneers adapted these algorithms to turn chaotic energy signals into a coherent map of activity.
The Integration (1973–1975)
Michael Phelps, Edward Hoffman, and Michel Ter-Pogossian built the PETT III in 1975—the first practical, multi-slice scanner, successfully combining chemistry, nuclear physics, and Boston’s emerging tech scene into a single, lifesaving machine.
250 Years of Progress
Innovation is rarely a lone Eureka moment; it is the layering of decades of distinct disciplines.

From Brian

For patients and their families, a PET scan is synonymous with a moment of profound terror or suspense. It is the test you wait for when the stakes are at their highest, the one that confirms if a treatment is working or if a disease has moved.

I have lived through that suspense very recently with a health issue in my own family. Standing on that side of the glass, you don’t think about the scintillation detectors or the radiochemistry. You only think about the answer.

Having seen the clarity those images provide, I have a newfound, deep appreciation for this technology. It is because we can map metabolism in motion that we can address disease with such surgical precision. 1977 gave us the eyes to see what was once invisible, and it is saving lives, including those closest to me, every single day.

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