Allan MacLeod Cormack

Allan MacLeod Cormack was a South African-American physicist whose mathematical work helped establish X-ray computed tomography. He shared the 1979 Nobel Prize in Physiology or Medicine with Godfrey Hounsfield.

X-ray computed tomography: Medical imaging that reconstructs cross-sectional images from measurements of X-ray transmission through an object. Cormack’s mathematical papers supplied foundational methods for reconstructing images from X-ray measurements.
Image reconstruction: The process of inferring an image or object from indirect measurements. Cormack’s central problem was recovering cross-sections from the projections recorded around an object.
University of Cape Town: A public research university in Cape Town, South Africa, founded in 1829. Cormack studied and later taught physics at the university where his early tomography work began.
Godfrey Hounsfield: An English electrical engineer who developed the first practical X-ray computed tomography scanner. Hounsfield built the scanner whose engineering achievement complemented Cormack’s mathematical foundations.
Radon transform: An integral transform that maps a function to its integrals over lines or planes. Cormack’s work applied inversion of projection data to the problem of reconstructing internal anatomy.
Tomographic reconstruction: The reconstruction of internal slices from measurements taken along multiple paths through an object. This is the specific reconstruction problem addressed by Cormack’s mathematical analyses.
University of Cambridge: A public research university in Cambridge, England, founded in 1209. Cormack pursued postgraduate study in physics at Cambridge after completing his education in South Africa.
Allan McLeod Cormack: A South African-American physicist whose mathematical work helped establish X-ray computed tomography. Cormack’s work is often presented alongside Hounsfield’s, though their contributions arose independently.
1979 Nobel Prize in Physiology or Medicine: The Nobel Prize awarded to Allan Cormack and Godfrey Hounsfield for developing computer-assisted tomography. The prize recognized the independent contributions that Cormack and Hounsfield made to computed tomography.
Filtered back projection: An algorithm that filters projection data before distributing it back across image space to form a tomographic image. It is a practical reconstruction method that uses the same projection-and-inversion framework relevant to Cormack’s work.

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RadiologyRelated: His contributions supplied key theory for turning projections into tomographic images.