William H. Oldendorf
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William Henry Oldendorf (March 27, 1925 – December 14, 1992) was an American neurologist, physician, researcher, medical pioneer, founding member of the American Society for Neuroimaging (ASN), and originator of the technique of
computed tomography A computed tomography scan (CT scan; formerly called computed axial tomography scan or CAT scan) is a medical imaging technique used to obtain detailed internal images of the body. The personnel that perform CT scans are called radiographers ...
.


Early life

William "Bill" Oldendorf was born in 1925, the youngest of four children, in
Schenectady, New York Schenectady () is a city in Schenectady County, New York, United States, of which it is the county seat. As of the 2020 census, the city's population of 67,047 made it the state's ninth-largest city by population. The city is in eastern New Y ...
. According to his sister Dorothy, William developed an interest in science and imaging through his fascination with telescopes. While still in high school, he placed one on the front sidewalk of their abode and studied the stars late into the night.


Academic education

Oldendorf graduated from high school at the age of 15 and afterwards attended
Union College Union College is a private liberal arts college in Schenectady, New York. Founded in 1795, it was the first institution of higher learning chartered by the New York State Board of Regents, and second in the state of New York, after Columbia Co ...
in
Schenectady, New York Schenectady () is a city in Schenectady County, New York, United States, of which it is the county seat. As of the 2020 census, the city's population of 67,047 made it the state's ninth-largest city by population. The city is in eastern New Y ...
—completing premedical studies in just 3 years. He received his medical degree from the
Albany Medical College Albany Medical College (AMC) is a private medical school in Albany, New York. It was founded in 1839 by Alden March and James H. Armsby and is one of the oldest medical schools in the nation. The college is part of the Albany Medical Center, which ...
in
Albany, New York Albany ( ) is the capital of the U.S. state of New York, also the seat and largest city of Albany County. Albany is on the west bank of the Hudson River, about south of its confluence with the Mohawk River, and about north of New York City ...
in 1947.


Medical training

Following medical
internship An internship is a period of work experience offered by an organization for a limited period of time. Once confined to medical graduates, internship is used practice for a wide range of placements in businesses, non-profit organizations and gover ...
at Ellis Hospital in Schenectady, Oldendorf completed a residency in
psychiatry Psychiatry is the medical specialty devoted to the diagnosis, prevention, and treatment of mental disorders. These include various maladaptations related to mood, behaviour, cognition, and perceptions. See glossary of psychiatry. Initial psych ...
through the
New York State New York, officially the State of New York, is a state in the Northeastern United States. It is often called New York State to distinguish it from its largest city, New York City. With a total area of , New York is the 27th-largest U.S. stat ...
Department of Mental Health
Residency Residency may refer to: * Domicile (law), the act of establishing or maintaining a residence in a given place ** Permanent residency, indefinite residence within a country despite not having citizenship * Residency (medicine), a stage of postgrad ...
Training Program. Then he enlisted for active duty in the
United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...
as a medical officer and was posted at the U.S. Naval Hospital in
Newport, Rhode Island Newport is an American seaside city on Aquidneck Island in Newport County, Rhode Island. It is located in Narragansett Bay, approximately southeast of Providence, Rhode Island, Providence, south of Fall River, Massachusetts, south of Boston, ...
. Two years later Oldendorf left the Navy to complete a
fellowship A fellow is a concept whose exact meaning depends on context. In learned or professional societies, it refers to a privileged member who is specially elected in recognition of their work and achievements. Within the context of higher education ...
in
neurology Neurology (from el, wikt:νεῦρον, νεῦρον (neûron), "string, nerve" and the suffix wikt:-logia, -logia, "study of") is the branch of specialty (medicine), medicine dealing with the diagnosis and treatment of all categories of co ...
at the
University of Minnesota The University of Minnesota, formally the University of Minnesota, Twin Cities, (UMN Twin Cities, the U of M, or Minnesota) is a public university, public Land-grant university, land-grant research university in the Minneapolis–Saint Paul, Tw ...
Hospitals in
Minneapolis, Minnesota Minneapolis () is the largest city in Minnesota, United States, and the county seat of Hennepin County. The city is abundant in water, with thirteen lakes, wetlands, the Mississippi River, creeks and waterfalls. Minneapolis has its origins ...
; for this reason, he was subsequently certified by the
American Board of Psychiatry and Neurology The American Board of Psychiatry and Neurology, Inc. (ABPN) is a not-for-profit corporation that was founded in 1934 following conferences of committees appointed by the American Psychiatric Association, the American Neurological Association, an ...
as a diplomate in both specialties.


Professional career

In 1956, Oldendorf joined the faculty of the new
medical school A medical school is a tertiary educational institution, or part of such an institution, that teaches medicine, and awards a professional degree for physicians. Such medical degrees include the Bachelor of Medicine, Bachelor of Surgery (MBBS, M ...
at the
University of California, Los Angeles The University of California, Los Angeles (UCLA) is a public land-grant research university in Los Angeles, California. UCLA's academic roots were established in 1881 as a teachers college then known as the southern branch of the California St ...
and the staff of the nearby UCLA-affiliated West
Los Angeles Los Angeles ( ; es, Los Ángeles, link=no , ), often referred to by its initials L.A., is the largest city in the state of California and the second most populous city in the United States after New York City, as well as one of the world' ...
Veterans Administration The United States Department of Veterans Affairs (VA) is a Cabinet-level executive branch department of the federal government charged with providing life-long healthcare services to eligible military veterans at the 170 VA medical centers and ...
Medical Center. He became an active member of the academic community, where his scientific, clinical, and teaching abilities were admired at the bedside, in seminars, at clinical conferences, in the auditorium, and in his laboratory. He engaged students and colleagues in long discussions about neurologic theory, the scientific process, or results of medical research. By 1959, Oldendorf was an attending
neurologist Neurology (from el, νεῦρον (neûron), "string, nerve" and the suffix -logia, "study of") is the branch of medicine dealing with the diagnosis and treatment of all categories of conditions and disease involving the brain, the spinal c ...
at the Wadsworth VA-UCLA Medical Center where his ability to apply techniques from one field to another did not go unnoticed. He was universally characterized as "likable", "friendly", "amusing", "creative", "intense", and "humble". Oldendorf's interest neuroimaging was precipitated by a dislike for invasive procedures (like
pneumoencephalography Pneumoencephalography (sometimes abbreviated PEG; also referred to as an "air study") was a common medical procedure in which most of the cerebrospinal fluid (CSF) was drained from around the brain by means of a lumbar puncture and replaced with ai ...
and direct carotid puncture) that he performed as a clinical neurologist. Oldendorf found that these traumatic, tedious tests provided only ''limited'' and ''indirect'' information about the brain. At UCLA, he started his seminal investigations into the two major lines of research that would define his career: X-ray shadow
radiography Radiography is an imaging technique using X-rays, gamma rays, or similar ionizing radiation and non-ionizing radiation to view the internal form of an object. Applications of radiography include medical radiography ("diagnostic" and "therapeut ...
and cerebral
angiography Angiography or arteriography is a medical imaging technique used to visualize the inside, or lumen, of blood vessels and organs of the body, with particular interest in the arteries, veins, and the heart chambers. Modern angiography is performe ...
. The first line was influential in the evolving concept of
neuroimaging Neuroimaging is the use of quantitative (computational) techniques to study the structure and function of the central nervous system, developed as an objective way of scientifically studying the healthy human brain in a non-invasive manner. Incre ...
; the second yielded fundamental knowledge of brain
metabolism Metabolism (, from el, μεταβολή ''metabolē'', "change") is the set of life-sustaining chemical reactions in organisms. The three main functions of metabolism are: the conversion of the energy in food to energy available to run cell ...
and mechanisms of the
blood–brain barrier The blood–brain barrier (BBB) is a highly selective semipermeable membrane, semipermeable border of endothelium, endothelial cells that prevents solutes in the circulating blood from ''non-selectively'' crossing into the extracellular fluid of ...
.


Contributions to medical science


Role in development of neuroimaging

In 1959, Oldendorf conceived an idea for "scanning a head through a transmitted beam of
X-rays An X-ray, or, much less commonly, X-radiation, is a penetrating form of high-energy electromagnetic radiation. Most X-rays have a wavelength ranging from 10 Picometre, picometers to 10 Nanometre, nanometers, corresponding to frequency, ...
, and being able to reconstruct the radiodensity patterns of a plane through the head" by watching an engineer who was working on an automated apparatus to reject frostbitten fruit by detecting dehydrated portions. Not until 1961 did he complete a working prototype of his idea, apply (for $1700) for a patent on his idea, and publish an article detailing the work. Ingeniously, by using materials found in his home (such as his son's toy train, a phonograph turntable, and an alarm clock motor), Oldendorf demonstrated a method of producing cross-sectional images of soft tissue by back-projection and reconstruction. In his landmark paper, also published in 1961, he described the basic concept later used by
Allan McLeod Cormack Allan MacLeod Cormack (February 23, 1924 – May 7, 1998) was a South African 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). Early life an ...
to develop the mathematics behind computerized tomography, though Prof. Cormack was unaware of Oldendorf's work. In October, 1963 Oldendorf finally received a U.S.
patent A patent is a type of intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an enabling disclosure of the invention."A p ...
for a "
radiant energy Radiant may refer to: Computers, software, and video games * Radiant (software), a content management system * GtkRadiant, a level editor created by id Software for their games * Radiant AI, a technology developed by Bethesda Softworks for ''The ...
apparatus for investigating selected areas of interior objects obscured by dense material,". This work was recognized by
Godfrey Hounsfield Sir Godfrey Newbold Hounsfield (28 August 1919 – 12 August 2004) was an English electrical engineer who shared the 1979 Nobel Prize for Physiology or Medicine with Allan MacLeod Cormack for his part in developing the diagnostic technique of X ...
as the only other attempt at
tomographic reconstruction Tomographic reconstruction is a type of multidimensional inverse problem where the challenge is to yield an estimate of a specific system from a finite number of projections. The mathematical basis for tomographic imaging was laid down by Johann ...
, and, indeed, formed the basis of much of his Nobel prize-winning work. The prototype developed by Dr. Oldendorf, however, did not lead to the development of the first industrial CAT scanning device. When suggested to a leading X-ray manufacturer of the time, the president of the company retorted, Faced with this reaction, Oldendorf "turned his attention to other scientific work and heard nothing further about the idea until 1972." However, his idea was a fundamental discovery which also led to
MRI Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body. MRI scanners use strong magnetic fields, magnetic field gradients, and radio waves ...
,
positron emission tomography Positron emission tomography (PET) is a functional imaging technique that uses radioactive substances known as radiotracers to visualize and measure changes in Metabolism, metabolic processes, and in other physiological activities including bl ...
(PET), single photon emission computed tomography (
SPECT Single-photon emission computed tomography (SPECT, or less commonly, SPET) is a nuclear medicine tomographic imaging technique using gamma rays. It is very similar to conventional nuclear medicine planar imaging using a gamma camera (that is, ...
), and other imaging techniques. Once these techniques became widely accepted, Dr. Oldendorf, along with William Markley McKinney, MD (1930–2003) were instrumental in promoting the use of
Computed Tomography A computed tomography scan (CT scan; formerly called computed axial tomography scan or CAT scan) is a medical imaging technique used to obtain detailed internal images of the body. The personnel that perform CT scans are called radiographers ...
among neurologists to help decrease the use of superfluous and invasive tests.


Blood–brain barrier

Oldendorf made many other discoveries that have significantly affected
neuroscience Neuroscience is the scientific study of the nervous system (the brain, spinal cord, and peripheral nervous system), its functions and disorders. It is a multidisciplinary science that combines physiology, anatomy, molecular biology, development ...
and the practice of
medicine Medicine is the science and practice of caring for a patient, managing the diagnosis, prognosis, prevention, treatment, palliation of their injury or disease, and promoting their health. Medicine encompasses a variety of health care pract ...
. He developed an original method to analyze blood flow in the brain and the
kinetics Kinetics ( grc, κίνησις, , kinesis, ''movement'' or ''to move'') may refer to: Science and medicine * Kinetics (physics), the study of motion and its causes ** Rigid body kinetics, the study of the motion of rigid bodies * Chemical ki ...
of blood-brain permeability. The idea of the blood–brain barrier was already entrenched in medical science by this time, but had never been quantified. Oldendorf's work in measuring blood flow with
radioactive isotopes A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is a nuclide that has excess nuclear energy, making it unstable. This excess energy can be used in one of three ways: emitted from the nucleus as gamma radiation; transferr ...
was fundamental to the subsequent development of techniques now used in many nuclear medicine laboratories. His methods of assessing blood–brain barrier permeability increased knowledge of the mechanisms whereby
drugs A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drugs are typically distinguished from food and substances that provide nutritional support. Consumption of drugs can be via inhalat ...
and metabolic substrates enter into the brain. Especially important was his characterization of more than a dozen independent carrier systems, along with their saturation kinetics. Today, most of what is known of the selective permeability of the blood–brain barrier was either established by Oldendorf in his laboratory, or by others using his ingenious techniques. These results have been essential in developing PET and SPECT imaging; in studying
glucose Glucose is a simple sugar with the molecular formula . Glucose is overall the most abundant monosaccharide, a subcategory of carbohydrates. Glucose is mainly made by plants and most algae during photosynthesis from water and carbon dioxide, using ...
transport Transport (in British English), or transportation (in American English), is the intentional movement of humans, animals, and goods from one location to another. Modes of transport include air, land (rail and road), water, cable, pipeline, an ...
and brain metabolism; and in characterizing clinically important diseases such as
cerebral ischemia Brain ischemia is a condition in which there is insufficient bloodflow to the brain to meet metabolic demand. This leads to poor oxygen supply or cerebral hypoxia and thus leads to the death of brain tissue or cerebral infarction/ischemic stroke. ...
,
starvation Starvation is a severe deficiency in caloric energy intake, below the level needed to maintain an organism's life. It is the most extreme form of malnutrition. In humans, prolonged starvation can cause permanent organ damage and eventually, dea ...
, and
epilepsy Epilepsy is a group of non-communicable neurological disorders characterized by recurrent epileptic seizures. Epileptic seizures can vary from brief and nearly undetectable periods to long periods of vigorous shaking due to abnormal electrical ...
. Oldendorf's experiments were also was the first to prove that
cerebrospinal fluid Cerebrospinal fluid (CSF) is a clear, colorless body fluid found within the tissue that surrounds the brain and spinal cord of all vertebrates. CSF is produced by specialised ependymal cells in the choroid plexus of the ventricles of the bra ...
functions as a "sink" in relationship to brain metabolism, a concept that is being investigated in relation to the
pathophysiology Pathophysiology ( physiopathology) – a convergence of pathology with physiology – is the study of the disordered physiological processes that cause, result from, or are otherwise associated with a disease or injury. Pathology is the ...
of presenile dementias such as
Alzheimer's disease Alzheimer's disease (AD) is a neurodegeneration, neurodegenerative disease that usually starts slowly and progressively worsens. It is the cause of 60–70% of cases of dementia. The most common early symptom is difficulty in short-term me ...
.


Professional publications and societies

In his lifetime, Oldendorf wrote three textbooks and over 250 scientific articles, including ''The Quest for an Image of the Brain: Computerized Tomography in the Perspective of Past and Future Imaging Methods'' (Raven Press, New York, 1980) and ''Basics of Magnetic Resonance Imaging'' (Kluwer Academic Press, Boston, 1988). The book ''Basics of Magnetic Resonance Imaging'' is notable for being co-authored with his son and
namesake A namesake is a person, geographic location, or other entity bearing the name of another. History The word is first attested around 1635, and probably comes from the phrase "for one's name's sake", which originates in English Bible translations ...
, William Oldendorf, Jr. Oldendorf was one of the 30 attendees of the Neurology Computed Tomography Symposium, organized by William Kinkel from September 24 to September 25, 1975, in
Buffalo, New York Buffalo is the second-largest city in the U.S. state of New York (behind only New York City) and the seat of Erie County. It is at the eastern end of Lake Erie, at the head of the Niagara River, and is across the Canadian border from South ...
. He participated in the ''ad hoc'' committee that unanimously voted to form the Society for Computerized Tomography so as to continue its educational activities. Realizing that other imaging modalities may eventually be prominent, the following year Oldendorf pushed to have the name of the society changed to Society for Computerized Tomography and Neuroimaging, and served as its president from 1978 to 1979. This society was to rename itself the American Society for Neuroimaging (ASN) in 1981, also with the prodding of Oldendorf. Oldendorf was on several editorial boards and was a Fellow of the
American Academy of Arts and Sciences The American Academy of Arts and Sciences (abbreviation: AAA&S) is one of the oldest learned societies in the United States. It was founded in 1780 during the American Revolution by John Adams, John Hancock, James Bowdoin, Andrew Oliver, and ...
. In 1992, he became the first neurologist ever to be elected to the
National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the Nati ...
.


Awards and prizes

In 1974, he shared the Ziedses des Plantes Gold Medal (given by the German Society of Neuroradiology and the Medical Physics Society of Wurzburgin) with
Godfrey Hounsfield Sir Godfrey Newbold Hounsfield (28 August 1919 – 12 August 2004) was an English electrical engineer who shared the 1979 Nobel Prize for Physiology or Medicine with Allan MacLeod Cormack for his part in developing the diagnostic technique of X ...
. Oldendorf was also awarded the Albert and Mary Lasker Award for Clinical Research in 1975 along with Prof. Hounsfield for "concepts and experiments which directly anticipated and demonstrated the feasibility of computerized tomography, which has revolutionized the field of neurological diagnosis". He received a Special Leadership Award from the
American Academy of Neurology The American Academy of Neurology (AAN) is a professional society representing over 38,000 neurologists and neuroscientists. As a medical specialty society it was established in 1948 by A.B. Baker of the University of Minnesota to advance the ar ...
in 1980 for "contributions to clinical neurology, including computerized tomographic scanning, studies on the blood–brain barrier, and research on cerebral metabolism." In 1981 he received the
President's Award for Distinguished Federal Civilian Service Established by President Dwight D. Eisenhower on 27 June 1957 by , the President's Award for Distinguished Federal Civilian Service was created to allow the President to recognize civilian officers or employees of the federal government who have ...
and the Medical Sciences Award from the UCLA
Alumni Association An alumni association or alumnae association is an association of graduates or, more broadly, of former students (alumni). In the United Kingdom and the United States, alumni of universities, colleges, schools (especially independent schools), ...
. Oldendorf was also * Fellow of the
Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers (IEEE) is a 501(c)(3) professional association for electronic engineering and electrical engineering (and associated disciplines) with its corporate office in New York City and its operation ...
(1986), * Distinguished Founder of the American Board of Nuclear Medicine Science, * Honorary Doctorate of Science (1982) from
Albany Medical College Albany Medical College (AMC) is a private medical school in Albany, New York. It was founded in 1839 by Alden March and James H. Armsby and is one of the oldest medical schools in the nation. The college is part of the Albany Medical Center, which ...
and
Union College Union College is a private liberal arts college in Schenectady, New York. Founded in 1795, it was the first institution of higher learning chartered by the New York State Board of Regents, and second in the state of New York, after Columbia Co ...
, * Honorary Doctorate of Science (1986) from St. Louis University, and * Keynote Speaker at the annual meeting of the Japanese Society of Neuroradiology in Tokyo in February, 1990


Nobel Prize controversy

Despite all his contributions to medical science, and despite the awards won in conjunction with the other eventual winners, Oldendorf was not awarded the
Nobel Prize in Physiology or Medicine The Nobel Prize in Physiology or Medicine is awarded yearly by the Nobel Assembly at the Karolinska Institute for outstanding discoveries in physiology or medicine. The Nobel Prize is not a single prize, but five separate prizes that, accord ...
with his colleagues
Godfrey Hounsfield Sir Godfrey Newbold Hounsfield (28 August 1919 – 12 August 2004) was an English electrical engineer who shared the 1979 Nobel Prize for Physiology or Medicine with Allan MacLeod Cormack for his part in developing the diagnostic technique of X ...
and Allan Cormack in 1979. This was in concordance with the Nobel committee's tradition of denying the prize to researchers in applied research (who have
M.D. Doctor of Medicine (abbreviated M.D., from the Latin ''Medicinae Doctor'') is a medical degree, the meaning of which varies between different jurisdictions. In the United States, and some other countries, the M.D. denotes a professional degree. T ...
degrees) in favor of researchers in the basic sciences (who have
Ph.D. A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: or ') is the most common degree at the highest academic level awarded following a course of study. PhDs are awarded for programs across the whole breadth of academic fields. Because it is a ...
degrees).
Rosalyn Yalow Rosalyn Sussman Yalow (July 19, 1921 – May 30, 2011) was an American medical physicist, and a co-winner of the 1977 Nobel Prize in Physiology or Medicine (together with Roger Guillemin and Andrew Schally) for development of the radioimmunoassay ...
, a Nobel laureate herself, nominated Oldendorf for the prize and was reportedly upset that he did not get it. In the January 1980 issue of the journal ''Science'' (vol. 207, page 31), William J. Broad wrote an article titled "The Riddle of the Nobel Debate" in which he posited that politics in Stockholm forced the removal of Dr. Oldendorf's name during the nomination process. It was theorized that giving the prize to another American could sway pending patent litigation in Europe over the rights to the CT Scanner.


Death and legacy

Despite the controversy over the Nobel Prize, Oldendorf was remarkably aplomb about the issue. He was supposed to have remarked He died unexpectedly on December 14, 1992 from the complications of
heart disease Cardiovascular disease (CVD) is a class of diseases that involve the heart or blood vessels. CVD includes coronary artery diseases (CAD) such as angina and myocardial infarction (commonly known as a heart attack). Other CVDs include stroke, hea ...
. In his eulogy, L. Jolyon West (Chairman of
Psychiatry Psychiatry is the medical specialty devoted to the diagnosis, prevention, and treatment of mental disorders. These include various maladaptations related to mood, behaviour, cognition, and perceptions. See glossary of psychiatry. Initial psych ...
a
UCLA
stated, He was survived by his wife, Stella Oldendorf, three sons, and the implications of his work which are still being investigated. In his honor, The Oldendorf Award is given annually by the American Society of
Neuroimaging Neuroimaging is the use of quantitative (computational) techniques to study the structure and function of the central nervous system, developed as an objective way of scientifically studying the healthy human brain in a non-invasive manner. Incre ...
based on the submission of a manuscript that involves clinical research in
computerized tomography A computed tomography scan (CT scan; formerly called computed axial tomography scan or CAT scan) is a medical imaging technique used to obtain detailed internal images of the body. The personnel that perform CT scans are called radiographers ...
,
magnetic resonance imaging Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body. MRI scanners use strong magnetic fields, magnetic field gradients, and radio wave ...
,
SPECT Single-photon emission computed tomography (SPECT, or less commonly, SPET) is a nuclear medicine tomographic imaging technique using gamma rays. It is very similar to conventional nuclear medicine planar imaging using a gamma camera (that is, ...
or
PET A pet, or companion animal, is an animal kept primarily for a person's company or entertainment rather than as a working animal, livestock, or a laboratory animal. Popular pets are often considered to have attractive appearances, intelligence, ...
scanning.


References


Biography of Dr. OldendorfRole of Dr. Oldendorf in formation of the ASNArticle from American Journal of Neuroradiology regarding the Controversy over the Nobel PrizeArticle on blood–brain barrier co-authored by Dr. OldendorfAnother article on Nuclear Medicine co-authored by Dr. Oldendorf
{{DEFAULTSORT:Oldendorf, William H. 1925 births 1992 deaths Albany Medical College alumni American neurologists David Geffen School of Medicine at UCLA faculty Members of the United States National Academy of Sciences United States Navy Medical Corps officers 20th-century American physicians Recipients of the Lasker-DeBakey Clinical Medical Research Award Recipients of the President's Award for Distinguished Federal Civilian Service