Charles Daniel Johnson is an American radiologist. Johnson graduated from the

College of Idaho The College of Idaho (C of I) is a private liberal arts college in Caldwell, Idaho. Founded in 1891 by Rev. William Judson Boone as a Presbyterian college, it is the state's oldest private liberal arts college and has an enrollment of over ...

with a degree in zoology. He subsequently studied medicine at

Mayo Medical School The Mayo Clinic Alix School of Medicine (MCASOM), formerly known as Mayo Medical School (MMS), is a research-oriented medical school based in Rochester, Minnesota, with additional campuses in Arizona and Florida. MCASOM is a school within the May ...

, where he later completed medical residencies in internal medicine and diagnostic radiology. Johnson pursued a master's degree in diagnostic radiology from the

University of Minnesota The University of Minnesota Twin Cities (historically known as University of Minnesota) is a public university, public Land-grant university, land-grant research university in the Minneapolis–Saint Paul, Twin Cities of Minneapolis and Saint ...

, followed by a fellowship and research training at

Duke University Duke University is a Private university, private research university in Durham, North Carolina, United States. Founded by Methodists and Quakers in the present-day city of Trinity, North Carolina, Trinity in 1838, the school moved to Durham in 1 ...

. Johnson holds a second master's degree in medical management from

Carnegie Mellon University Carnegie Mellon University (CMU) is a private research university in Pittsburgh, Pennsylvania, United States. The institution was established in 1900 by Andrew Carnegie as the Carnegie Technical Schools. In 1912, it became the Carnegie Institu ...

. He is a professor of radiology and consultant to the

Mayo Clinic Alix School of Medicine The Mayo Clinic Alix School of Medicine (MCASOM), formerly known as Mayo Medical School (MMS), is a research-oriented medical school based in Rochester, Minnesota, with additional campuses in Arizona and Florida. MCASOM is a school within the May ...

Department of Radiology. In February 2014, Johnson became editor-in-chief of the journal ''Abdominal Imaging'', succeeding Morton Meyers. During Johnson's tenure as chief editor, the journal was renamed '' Abdominal Radiology'' in January 2016. Johnson has studied the effectiveness of virtual colonoscopy (colon cancer screening using

CT scan A computed tomography scan (CT scan), formerly called computed axial tomography scan (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 or ...

s) as compared to

colonoscopy Colonoscopy () or coloscopy () is a medical procedure involving the Endoscopy, endoscopic examination of the large bowel (colon) and the distal portion of the small bowel. This examination is performed using either a Charge-coupled device, CCD ...

. He said virtual colonoscopy finds 90% of large, precancerous polyps but is less successful with smaller ones.

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* * * {{DEFAULTSORT:Johnson, C. Daniel American radiologists Living people College of Idaho alumni Medical journal editors Carnegie Mellon University alumni University of Minnesota alumni Mayo Clinic people Year of birth missing (living people)