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Mahadevappa Mahesh, M.S., Ph.D.
Chief Physicist, The Johns Hopkins Hospital
Professor of Radiology and Radiological Science
Research Interests: Development of improved methods for radiation dose assessments during pediatric CT scans; Investigation of radiation dose strategies in MDCT; Assessment of multiple-row detector computed tomography (MDCT) technology, with emphasis on image quality and radiation dose ...read more
Dr. Mahadevappa Mahesh is a Professor in the Johns Hopkins Medicine Department of Radiology and Radiological Science and the Division of Cardiology. He is also the Chief Physicist at The Johns Hopkins Hospital. Dr. Mahesh also has a joint appointment in the Johns Hopkins Bloomberg School of Medicine Department of Environmental Health.
His research interests are in medical physics and imaging, particularly in areas of multiple-row detector computed tomography (MDCT), interventional fluoroscopy and digital mammography.
As chief physicist, he oversees the quality assurance program for diagnostic radiology, which includes maintaining compliance with regard to state and federal regulations and ensuring safe use of radiation to patients. He often provides counsel to patients concerned over their radiation exposure from diagnostic x-ray examinations.
He received a B.S. in math and physics and an M.S. in solid-state physics from the University of Mysore in Mysore India. He then completed an M.S. in physics at Marquette University in Milwaukee, Wisconsin, and in 1993 obtained his Ph.D. in medical physics from the Medical College of Wisconsin.
Dr. Mahesh is a fellow of the American Association of Physicists in Medicine, the American College of Radiology, the American College of Medical Physics and the Society of Cardiovascular Computed Tomography. He has authored numerous articles and a textbook in the area of MDCT technology and radiation doses in medical imaging, has lectured extensively in the U.S. and internationally, and serves on the editorial boards of several journals, including the Journal of the American College of Radiology, the Journal of the American Association of Physicists in Medicine, Academic Radiology, and RadioGraphics. He chairs or serves on numerous committees for professional organizations, and is certified by the American Board of Radiology in diagnostic radiological physics.
- Chief Physicist, The Johns Hopkins Hospital
- Professor of Radiology and Radiological Science
- Professor of Medicine
Departments / Divisions
Centers & Institutes
- M.S., Marquette University (Wisconsin) (1988)
- Ph.D., Medical College of Wisconsin - Milwaukee (Wisconsin) (1993)
- Diagnostic Radiologic Physics, American Board of Radiology (1996)
Medical College of Wisconsin, Milwaukee, WI, 1993
Research & Publications
Selected PublicationsView all on Pubmed
Mettler FA, Huda W, Yoshizumi TT, Mahesh M. Effective Doses in Radiology and Nuclear Medicine: a Catalog. Radiology. 2008; 248 (1): 254-263. [Top 50 most cited articles in Radiology as of March 2013]
Berrington de Gonzalez A, Mahesh M, Kim KP, Bhargavan M, Lewis R, Mettler F, Land C. Projected cancer risks from computed tomographic scans performed in the United States in 2007. Arch Intern Med. 2009; 169 (22): 2071-2077.
Mayo-Smith WW, Hara AK, Mahesh M, Sahani DV and Pavlicek W. How I Do It: Managing Radiation Dose in CT. Radiology. 2014; 273 (3): 657-672.
Mahesh M. Fluoroscopy: Patient Radiation Exposure Issues. RadioGraphics. 2001; 21(4): 1003-1045. [Top 50 most-cited articles as of March 2013]
Mahesh M. Digital Mammography: An Overview. RadioGraphics. 2004; 24(6): 1747-1760.
Mahesh M. How to prepare for the Joint Commission's Sentinel Event Policy pertaining to Prolonged Fluoroscopy. J Am Coll Radiol. 2008; 5(4): 601-603.
Mahesh M. What Is the CT Dose Check Standard, and Why Do CT Scanners Need to Be in Compliance? J Am Coll Radiol. 2016; 13(1): 64-66.
Mahesh M. Radiation. JACR 10th year anniversary musings, J Am Coll Radiol. 2013; 10(8): 557-558.
Mahesh M. MDCT Physics: The Basics - Technology, Image Quality and Radiation Dose. Lippincott Williams & Wilkins, Philadelphia, PA. 2009.
Contact for Research Inquiries
The Russell H. Morgan Department of Radiology and Radiological Science
601 N. Caroline Street
Baltimore, MD 21287 map
Activities & Honors
- Fellow, American College of Medical Physics, 2011
- Fellow, American College of Radiology, 2009
- Distinguished Medical Physicist Award, Indo-American Society of Medical Physicists, 2012
- Travel Award Recipient, Medical College of Wisconsin, 1992 - 1993
- Life Membership, National Registry of Who''s Who, 1999
- Fellow, Society of Cardiovascular Computed Tomography, 2011
- National Merit Scholarship, University of Mysore, 1984 - 1986
- Travel grant from to attend International Conference on Medical Physics, US National Academy’s National Research Council, 2002
- Inducted, Sigma Pi Sigma–Physics Honor Society
- Appointed to the State of Maryland’s Radiation Control Advisory Board, Governor of the State of Maryland, 2002
- Fellow, American Association of Physicists in Medicine, 2007
- Academic Radiology
- Journal of American College of Radiology, 2007
Editor of Technology Talk and Medical Physics Consult columns
- Journal of the American College of Radiology
- Newsletter for the American Association of Physicists in Medicine, 2007
Editorial Board Member
- Radiological Society of North America
Second Vice President
- National Institute of Health (NIH) Clinical Center, Special Research Volunteer
Videos & Media
e-Radiology Learning | CT Dose Modulation
e-Radiology Learning | CT Dose Display
e-Radiology Learning | Radiation Protection
e-Radiology Learning | CT Dose and Risks
e-Radiology Learning | CT Scan Parameters
e-Radiology Learning | Radiation Risks