Allan McLeod Cormack
Encyclopedia
Allan MacLeod Cormack was a South Africa
n-born American
physicist
who won the 1979 Nobel Prize in Physiology or Medicine
(along with Godfrey Hounsfield
) for his work on X-ray
computed tomography
(CT).
Cormack was born in Johannesburg
, South Africa. He attended the Rondebosch Boys' High School
in Cape Town
, where he was active in the debating and tennis teams. He received his B.Sc. in physics
in 1944 from the University of Cape Town
and his M.Sc. in crystallography
in 1945 from the same institution. He was a research student at Cambridge University
from 1947–49, and while at Cambridge he met his future wife, Barbara Seavey, an American physics student.
After marrying Seavey, he returned to the University of Cape Town in early 1950 to lecture. Following a sabbatical at Harvard in 1956-57, the couple agreed to move to the United States, and Cormack became a professor at Tufts University
in the fall of 1957. Cormack became a naturalized citizen of the United States in 1966. Although he was mainly working on particle physics
, Cormack's side interest in x-ray technology led him to develop the theoretical underpinnings of CT scanning. This work was initiated at the University of Cape Town and Groote Schuur Hospital
in early 1956 and continued briefly in mid-1957 after returning from his sabbatical. His results were subsequently published in two papers in the Journal of Applied Physics in 1963 and 1964. These papers generated little interest until Hounsfield and colleagues built the first CT scanner in 1971, taking Cormack's theoretical calculations into a real application. For their independent efforts, Cormack and Hounsfield shared the 1979 Nobel Prize in Physiology or Medicine. He was member of the International Academy of Science. In 1990, he was awarded the National Medal of Science
.
Cormack died of cancer in Massachusetts at age 74. He was posthumously awarded the Order of Mapungubwe
on the 10 December 2002 for outstanding achievements as a scientist and for co-inventing the CT scanner.
South Africa
The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...
n-born American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
physicist
Physicist
A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...
who won the 1979 Nobel Prize in Physiology or Medicine
Nobel Prize in Physiology or Medicine
The Nobel Prize in Physiology or Medicine administered by the Nobel Foundation, is awarded once a year for outstanding discoveries in the field of life science and medicine. It is one of five Nobel Prizes established in 1895 by Swedish chemist Alfred Nobel, the inventor of dynamite, in his will...
(along with Godfrey Hounsfield
Godfrey Hounsfield
Sir Godfrey Newbold Hounsfield CBE, FRS, was an English electrical engineer who shared the 1979 Nobel Prize for Physiology or Medicine with Allan McLeod Cormack for his part in developing the diagnostic technique of X-ray computed tomography .His name is immortalised in the Hounsfield scale, a...
) for his work on X-ray
X-ray
X-radiation is a form of electromagnetic radiation. X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz and energies in the range 120 eV to 120 keV. They are shorter in wavelength than UV rays and longer than gamma...
computed tomography
Computed tomography
X-ray computed tomography or Computer tomography , is a medical imaging method employing tomography created by computer processing...
(CT).
Cormack was born in Johannesburg
Johannesburg
Johannesburg also known as Jozi, Jo'burg or Egoli, is the largest city in South Africa, by population. Johannesburg is the provincial capital of Gauteng, the wealthiest province in South Africa, having the largest economy of any metropolitan region in Sub-Saharan Africa...
, South Africa. He attended the Rondebosch Boys' High School
Rondebosch Boys' High School
Rondebosch Boys' High School is a state secondary school in Rondebosch, a suburb of Cape Town, South Africa. It was founded in 1897 and is known by the acronym "RBHS".-Academics:...
in Cape Town
Cape Town
Cape Town is the second-most populous city in South Africa, and the provincial capital and primate city of the Western Cape. As the seat of the National Parliament, it is also the legislative capital of the country. It forms part of the City of Cape Town metropolitan municipality...
, where he was active in the debating and tennis teams. He received his B.Sc. in physics
Physics
Physics is a natural science that involves the study of matter and its motion through spacetime, along with related concepts such as energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.Physics is one of the oldest academic...
in 1944 from the University of Cape Town
University of Cape Town
The University of Cape Town is a public research university located in Cape Town in the Western Cape province of South Africa. UCT was founded in 1829 as the South African College, and is the oldest university in South Africa and the second oldest extant university in Africa.-History:The roots of...
and his M.Sc. in crystallography
Crystallography
Crystallography is the experimental science of the arrangement of atoms in solids. The word "crystallography" derives from the Greek words crystallon = cold drop / frozen drop, with its meaning extending to all solids with some degree of transparency, and grapho = write.Before the development of...
in 1945 from the same institution. He was a research student at Cambridge University
University of Cambridge
The University of Cambridge is a public research university located in Cambridge, United Kingdom. It is the second-oldest university in both the United Kingdom and the English-speaking world , and the seventh-oldest globally...
from 1947–49, and while at Cambridge he met his future wife, Barbara Seavey, an American physics student.
After marrying Seavey, he returned to the University of Cape Town in early 1950 to lecture. Following a sabbatical at Harvard in 1956-57, the couple agreed to move to the United States, and Cormack became a professor at Tufts University
Tufts University
Tufts University is a private research university located in Medford/Somerville, near Boston, Massachusetts. It is organized into ten schools, including two undergraduate programs and eight graduate divisions, on four campuses in Massachusetts and on the eastern border of France...
in the fall of 1957. Cormack became a naturalized citizen of the United States in 1966. Although he was mainly working on particle physics
Particle physics
Particle physics is a branch of physics that studies the existence and interactions of particles that are the constituents of what is usually referred to as matter or radiation. In current understanding, particles are excitations of quantum fields and interact following their dynamics...
, Cormack's side interest in x-ray technology led him to develop the theoretical underpinnings of CT scanning. This work was initiated at the University of Cape Town and Groote Schuur Hospital
Groote Schuur Hospital
Groote Schuur Hospital is a large, government-funded, teaching hospital situated on the slopes of Devil's Peak in the city of Cape Town, South Africa...
in early 1956 and continued briefly in mid-1957 after returning from his sabbatical. His results were subsequently published in two papers in the Journal of Applied Physics in 1963 and 1964. These papers generated little interest until Hounsfield and colleagues built the first CT scanner in 1971, taking Cormack's theoretical calculations into a real application. For their independent efforts, Cormack and Hounsfield shared the 1979 Nobel Prize in Physiology or Medicine. He was member of the International Academy of Science. In 1990, he was awarded the National Medal of Science
National Medal of Science
The National Medal of Science is an honor bestowed by the President of the United States to individuals in science and engineering who have made important contributions to the advancement of knowledge in the fields of behavioral and social sciences, biology, chemistry, engineering, mathematics and...
.
Cormack died of cancer in Massachusetts at age 74. He was posthumously awarded the Order of Mapungubwe
Order of Mapungubwe
The Order of Mapungubwe is South Africa's highest honour. It was instituted on 6 December 2002, and is granted by the president of South Africa, for achievements in the international area which have served South Africa's interests...
on the 10 December 2002 for outstanding achievements as a scientist and for co-inventing the CT scanner.