Historical Timeline

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1890 - The world's first X-ray image was produced by Arthur W. Goodspeed and W.N. Jennings on February 22, 1890 at PENN. Not knowing the significance, they never published it. Roentgen published his seminal paper five years later.

1896 - The first medical X-ray image at HUP was obtained, only three months after Roentgen's discovery. - Later the same year, the "skiagraph" was used by the chief of surgery to locate a foreign body in the abdomen. - Goodspeed and Charles Lester Leonard wrote the first analytical paper on the various systematic applications of Roentgen rays to medicine.

1897 - The Division of Roentgenology Services officially opened at HUP, believed to be the first radiology department in the United States. There was one x-ray unit for clinical work and one for research.

1898 - Charles Lester Leonard used X-rays as a method to identify urinary stones. He also wrote the first paper on the hazards of X-rays.



A 250 page book written by Otha W. Linton, former associate executive director of the American College of Radiology, outlining the long history of radiology at PENN up until 1996.

1905 - Henry Pancoast described the utility of bismuth and then barium for contrast in radiology studies. Among many other contributions, he is known for his description of Pancoast's tumor. He also later described the relationship of prolonged irradiation and the development of leukemia.and the use of X-rays in the treatment of Hodgkin's disease and leukemias.

1911 - Henry Pancoast was appointed as the first Professor of Radiology (roentgenology) in the United States.

1928 - Although residents were appointed to the radiology service as early as 1898, a formal residency training program was established this year at HUP.

1932 - Eugene P. Pendergrass became the first chairman of education in the American College of Radiology.

1934 - Henry Pancoast became the founding president of the American Board of Radiology.

1940 - The University's Eldridge Reeves Johnson Foundation for Medical Physics started experiments with ultrasound and pioneered the first biomedical applications of this new discovery.

1949 - Britton Chance became director of the Johnson Foundation for Medical Physics. He is a pioneer in biophysics and its applications to medicine. He trained generations of eminent scholars and researchers in the radiological sciences throughout the country. He and his associates later developed the technique of Optical Imaging.


1954 - David E. Kuhl invented the first photorecording radionuclide scanner. This invention helped the acquisition of images in nuclear medicine.

1958 - A new building named William H. Donner Center for Radiology was added to HUP. - Mortimer Mendelsohn opened the Radiation Biology Laboratory.

1959 - The world's first transverse section emission tomographic image was obtained at HUP by David Kuhl and Roy Edwards on August 21.

1960s - Radiologist Stanley Baum and surgeon Moreye Nusbaum pioneered the field to be known as interventional radiology. Stanley Baum later became chairman of radiology at the University of Pennsylvania from 1975-1996.

1964 - David E. Kuhl and Roy Edwards developed the Mark II emission tomographic scanner, starting the field of cross-sectional tomographic imaging. Kuhl went to develop the technique of Single Photon Emission Computed Tomography (SPECT) and the principles of Positron Emission Tomography (PET). - HUP obtained its first linear accelerator.

1966 - The first transmission construction tomography image of man was produced at HUP by David Kuhl. This technique led to the development of CT scanning. - Stanley Baum and associates used selective intrarterial catheter vasopressin infusions for the treatment of gastrointestinal bleeding.

1972 - Stanley Baum became the founding president of the Society of Cardiovascular and Interventional Radiology (SCVIR).

1975 - Stanley Baum became chairman of radiology at the University of Pennsylvania.

1975 - The first in-vivo absolute measurement of local cerebral blood volume in animals and man was performed at HUP.

1976 - The world's first fluorodeoxyglucose PET image was obtained at HUP, starting an ongoing new era in functional imaging.

1977 - Abass Alavi and associates developed the gastrointestinal bleeding scan. Alavi is currently chief of nuclear medicine at HUP. - PACS technology was initiated at HUP by Arenson, London and Morton. Ronald Arenson is currently chairman of radiology at UCSF.

1978 - Hans Herlinger developed the technique of methylcellulose double contrast small bowel study (Enteroclysis).

1981 - Coincident system based scintillation camera detectors were developed at HUP. - The medical image processing group was formed. Among many other achievements, they helped develop and advance the mathematical basis for tomography and 3D imaging.


The pyramidal roof of the Devon MRI Building.

1982 - The country's first hospital based MRI became operational at HUP. - The Eugene P. Pendergrass Lab for Radiology Research was inaugurated.

1984 - The David Devon MRI Building opened at HUP.

1986-1987 - Penn Radiology Chairman Stanley Baum, MD, serves as President Society of Chairmen of Academic Radiology Departments.

1995 - Presbyterian Hospital joins Penn Health System.

1996 - Reuben Mezrich, MD was appointed Interim Chairman of Radiology by the University Administration at the University of Pennsylvania

1997-1999 - Penn Radiology Chairman Stanley Baum, MD, serves as President Academy of Radiology Research.

1998 - Wallace T. Miller Sr., MD awarded RSNA Gold Medal.

1998 - Penn Radiology Chairman Stanley Baum, MD, receives Gold Medal, Society of Cardiovascular and Interventional Radiology.

1999 - R. Nick Bryan, MD PhD became chairman of radiology at the University of Pennsylvania.


2001 - Penn Radiology Chairman Stanley Baum, MD, receives Gold Medal, American Roentgen Ray Society.

2002 - Establishment of the Stanley Baum Professorship in the Department of Radiology, University of Pennsylvania.

2002 - Penn Radiology Chairman R. Nick Bryan, MD PhD serves as RSNA president.

2002 - Penn Tower Outpatient Radiology Center opens.

2003 - Stanley Baum, MD, Penn Radiology chairman emeritus and editor of Academic Radiology was awarded the 2003 Gold Medal by the Association of University Radiologists.