PeopleofSuperintelligence

Researcher

Kunio Doi

Also known as 土井邦雄

Kunio Doi is a medical physicist who is widely recognized as the "father of computer-aided diagnosis," an approach in which a computer gives radiologists a second opinion on medical images. Born in Japan in 1939, he worked at Kyokko Research Laboratories before joining the University of Chicago's Department of Radiology in 1969, where the Kurt Rossmann Laboratories for Radiologic Image Research expanded under his direction. Large-scale CAD research began there in the early 1980s and produced detection schemes for breast and lung cancer, along with a first CAD patent dated 1987 that R2 Technology later commercialized. He retired in 2009 after publishing more than 610 articles, and the International Commission on Radiation Units and Measurements presented him its 23rd Gray Medal in April 2023. He is a professor emeritus in the Department of Radiology at the University of Chicago.

Badges

Timeline

  1. 1969–1976

    Joining the Rossmann Laboratories

    Born in Japan in 1939, he works at a small company called Kyokko Research Laboratories before joining the University of Chicago's Department of Radiology in 1969. He helps establish modulation transfer function and Wiener spectrum analysis for judging image quality in radiography. In 1976, the center takes the name Kurt Rossmann Laboratories for Radiologic Image Research after Kurt Rossmann's death, and it expands under Doi's direction.

  2. 1980s

    Starting computer-aided diagnosis

    Large-scale research and development of CAD schemes begins in the early 1980s at the Rossmann Laboratories under Doi, who becomes widely recognized as the "father of computer-aided diagnosis." By the mid-1980s, his team has approaches for detecting masses and microcalcifications in breast cancer mammograms and lung nodules in chest images and CT scans. The idea is that a computer's second opinion, combined with a physician's judgment, improves cancer detection.

  3. 1987–1993

    The first CAD patent

    His team's first CAD patent dates from 1987, and R2 Technology later commercializes it with FDA approval. The CAD technology for detecting clustered microcalcifications in mammograms is licensed to a company in 1993.

  4. 2007–2014

    A historical review of CAD

    In 2007, he publishes "Computer-Aided Diagnosis in Medical Imaging: Historical Review, Current Status and Future Potential" in Computerized Medical Imaging and Graphics, noting that many CAD systems already assist physicians in detecting breast cancer on mammograms. In 2014, he presents "CAD for Lung Cancer Detection: Where Do We Stand?" in an RSNA refresher course on computer-aided diagnosis.

  5. 2009–2022

    Retirement and a scholarship fund

    He retires from the University of Chicago in 2009 after publishing more than 610 articles, holding the Ralph W. Gerard Professorship in the Biological Sciences, and directing Graduate Programs in Medical Physics for more than 10 years. He estimates that he trained about 90 professors, including Maryellen Giger and Heang-Ping Chan. In 2022, he commits a $2 million bequest to endow the Dr. and Mrs. Kunio Doi Scholarship and Research Fund, which supports students in the Medical Physics Program and research by trainees in the Department of Radiology.

  6. 2021

    Founding editor of a journal

    In 2021, the Japan Society of Medical Physics appoints Nobuyuki Kanematsu as the new Editor-in-Chief of Radiological Physics and Technology, succeeding its founding Editor-in-Chief, Doi.

  7. April 2023

    The ICRU Gray Medal

    The International Commission on Radiation Units and Measurements awards him its 23rd Gray Medal in April 2023 at the Japan Radiology Congress in Yokohama, where he gives a talk titled "Image Analysis and Computer-Aided Diagnosis (CAD) in Medical Imaging." Radiological Physics and Technology publishes an editorial on the award in May 2023.

  8. As of October 2026

    Professor emeritus at Chicago

    He is professor emeritus in the Department of Radiology at the University of Chicago, where he served from 1969 until his retirement in 2009.

Career

  1. Since 1969University of ChicagoProfessor, Ralph W. Gerard Professor in the Biological Sciences
  2. Until 1969Kyokko Research Laboratories

From the biography.

  1. The median h-index is 48 at universities and 14 at frontier AI labsIncludes University of Chicago. The median h-index is 48 at universities and 14 at frontier AI labs. We compare publishing careers, recent citations, dual appointments and job moves across 2,420 university researchers and 308 frontier-lab researchers.
  2. The Massachusetts Institute of Technology trained or employed 44 of the 187 AI major-prize winners, more than any other universityIncludes University of Chicago. The Massachusetts Institute of Technology trained or employed 44 of the 187 AI major-prize winners, more than any other university. We compare doctorate and 5+ year employment links, career timing and current workplaces for 187 major-prize and 1,111 best-paper winners.
  3. More people shaping AI studied at Massachusetts Institute of Technology than at any other institutionIncludes University of Chicago. We estimate where the people shaping AI studied and where their careers led. Massachusetts Institute of Technology leads with 467 former students, including 291 recorded doctorates.
  4. The company share of AI researchers’ top papers was 31% in 2020–2024 and 8% in 1970–1974Includes University of Chicago. We estimate where the people shaping AI worked when their most-cited papers appeared: the company share was 31% in 2020–2024 and 8% in 1970–1974, and Google led all organizations in 2020–2024.

Colleagues

People with dated positions at the same organization in the same years.

Sources and credits

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  1. Gift supports next generation of leaders in medical imaging, cancer diagnosis givetomedicine.uchicago.edu. Checked 21 October 2026.
  2. The Kurt Rossman Laboratories | Department of Radiology | The University of Chicago radiology.uchicago.edu. Checked 21 October 2026.
  3. Computer-Aided Diagnosis in Medical Imaging: Historical Review, Current Status and Future Potential pmc.ncbi.nlm.nih.gov. Checked 21 October 2026.
  4. CAD for Lung Cancer Detection: Where Do We Stand? archive.rsna.org. Checked 21 October 2026.
  5. Appointment of a new Editor-in-Chief for an IOMP-supported journal, Radiological Physics and Technology iomp.org. Checked 21 October 2026.
  6. 23rd Gray Medal Awarded – ICRU icru.org. Checked 21 October 2026.
  7. 2023 Vol.16 issue 2 | Japanese Society of Radiological Technology jsrt.or.jp. Checked 21 October 2026.
  8. Kunio Doi, Professor Emeritus | HealthManagement.org healthmanagement.org. Checked 21 October 2026.