In what year did M.M. Tear-Pogossian and M.E. Phelps build the first closed-ring transverse positron tomography for PET imaging?

In what year did M.M. Tear-Pogossian and M.E. Phelps build the first closed-ring transverse positron tomography for PET imaging?

• A. 1975
• B. 1965
• C. 1985
• D. 1995

Answer: (A)

A key idea here is how PET hardware evolved to enable true tomographic imaging. A closed-ring detector arrangement around the subject, operating in a transverse plane, provides complete 360-degree angular coverage so annihilation events can be localized with high sensitivity and accuracy. In 1975, M.M. Tear-Pogossian and M.E. Phelps built the first closed-ring transverse PET scanner, a breakthrough that allowed true cross-sectional imaging rather than limited planar views. This design eliminated many artifacts and improved quantitative capability, laying the groundwork for the modern PET systems used clinically and in research.

A key idea here is how PET hardware evolved to enable true tomographic imaging. A closed-ring detector arrangement around the subject, operating in a transverse plane, provides complete 360-degree angular coverage so annihilation events can be localized with high sensitivity and accuracy. In 1975, M.M. Tear-Pogossian and M.E. Phelps built the first closed-ring transverse PET scanner, a breakthrough that allowed true cross-sectional imaging rather than limited planar views. This design eliminated many artifacts and improved quantitative capability, laying the groundwork for the modern PET systems used clinically and in research.