Gary Ghahremani | |
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| Born | January 30, 1941 |
| Education | |
| Occupation | Radiologist |
| Medical career | |
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| Sub-specialties | Diagnostic and gastrointestinal imaging |
Gary G. Ghahremani is an Iranian-American radiologist specializing in diagnostic and gastrointestinal imaging with over 40 years experience as Professor of Radiology. His work has been cited in over 5000 medical papers. [1]
After retiring as Evanston Hospital's Professor and chairman in the Department of Diagnostic Radiology, [2] Ghahremani became a Clinical Professor of Radiology at the University of California Medical Center in San Diego. He is author of the textbook Iatrogenic Gastrointestinal Complications. [3] As of 2022, Ghahremani has published over 150 scientific articles. [4]
Gastroenterology is the branch of medicine focused on the digestive system and its disorders. The digestive system consists of the gastrointestinal tract, sometimes referred to as the GI tract, which includes the esophagus, stomach, small intestine and large intestine as well as the accessory organs of digestion which include the pancreas, gallbladder, and liver. The digestive system functions to move material through the GI tract via peristalsis, break down that material via digestion, absorb nutrients for use throughout the body, and remove waste from the body via defecation. Physicians who specialize in the medical specialty of gastroenterology are called gastroenterologists or sometimes GI doctors. Some of the most common conditions managed by gastroenterologists include gastroesophageal reflux disease, gastrointestinal bleeding, irritable bowel syndrome, inflammatory bowel disease (IBD) which includes Crohn's disease and ulcerative colitis, peptic ulcer disease, gallbladder and biliary tract disease, hepatitis, pancreatitis, colitis, colon polyps and cancer, nutritional problems, and many more.
An upper gastrointestinal series, also called a barium swallow, barium study, or barium meal, is a series of radiographs used to examine the gastrointestinal tract for abnormalities. A contrast medium, usually a radiocontrast agent such as barium sulfate mixed with water, is ingested or instilled into the gastrointestinal tract, and X-rays are used to create radiographs of the regions of interest. The barium enhances the visibility of the relevant parts of the gastrointestinal tract by coating the inside wall of the tract and appearing white on the film. This in combination with other plain radiographs allows for the imaging of parts of the upper gastrointestinal tract such as the pharynx, larynx, esophagus, stomach, and small intestine such that the inside wall lining, size, shape, contour, and patency are visible to the examiner. With fluoroscopy, it is also possible to visualize the functional movement of examined organs such as swallowing, peristalsis, or sphincter closure. Depending on the organs to be examined, barium radiographs can be classified into "barium swallow", "barium meal", "barium follow-through", and "enteroclysis". To further enhance the quality of images, air or gas is sometimes introduced into the gastrointestinal tract in addition to barium, and this procedure is called double-contrast imaging. In this case the gas is referred to as the negative contrast medium. Traditionally the images produced with barium contrast are made with plain-film radiography, but computed tomography is also used in combination with barium contrast, in which case the procedure is called "CT enterography".
Endoscopic retrograde cholangiopancreatography (ERCP) is a technique that combines the use of endoscopy and fluoroscopy to diagnose and treat certain problems of the biliary or pancreatic ductal systems. It is primarily performed by highly skilled and specialty trained gastroenterologists. Through the endoscope, the physician can see the inside of the stomach and duodenum, and inject a contrast medium into the ducts in the biliary tree and pancreas so they can be seen on radiographs.
William Ralph Brody is an American radiologist and academic administrator. He was the President of The Johns Hopkins University, a position which he held from 1996 to 2009 before becoming the President of the Salk Institute from 2009 to 2015.
Abass Alavi is an Iranian-American physician-scientist specializing in the field of molecular imaging, most notably in the imaging modality of positron emission tomography (PET). In August 1976, he was part of the team that performed the first human PET studies of the brain and whole body using the radiotracer [18F]Fluorodeoxyglucose (FDG). Alavi holds the position of Professor of Radiology and Neurology, as well as Director of Research Education in the Department of Radiology at the University of Pennsylvania. Over a career spanning five decades, he has amassed over 2,300 publications and 60,000 citations, earning an h-index of 125 and placing his publication record in the top percentile of scientists.
Daniel B. Kopans, MD, FACR is a radiologist specializing in mammography and other forms of breast imaging.
Ralph Weissleder is an American clinician scientist.
Alexander R. Margulis was a Serbian American physician who was a professor of radiology at Weill Cornell Medical College, Cornell University. He was formerly the Associate Chancellor and Chairman of Radiology at University of California, San Francisco. Over 8 of his papers have each been cited over 100 times.
Val Murray Runge is an American and Swiss professor of radiology and the editor-in-chief of Investigative Radiology. Runge was one of the early researchers to investigate the use of gadolinium-based contrast agents for magnetic resonance imaging (MRI), giving the first presentation in this field, followed two years later by the first presentation of efficacy. His research also pioneered many early innovations in MRI, including the use of tilted planes and respiratory gating. His publication on multiple sclerosis in 1984 represented the third and largest clinical series investigating the role of MRI in this disease, and the first to show characteristic abnormalities on MRI in patients whose CT was negative.
Sudarshan Kumar Aggarwal is an Indian medical doctor and radiologist. He was honoured by the Government of India, in 2013, by bestowing on him the Padma Shri, the fourth highest civilian award, for his contributions to the field of medicine.
Hans Gregersen is a Danish bioengineer and scientist. He is regarded as a key figure in the field of gastrointestinal biomechanics and function.
Alice Ettinger was a prominent radiologist and professor of medicine. A native of Germany, Ettinger trained there before coming to the Tufts University School of Medicine. She had come for a visit to Boston to demonstrate the spot film imaging technique, and she decided to stay at Tufts permanently.
Robert I. Grossman is an American physician-researcher. He is chief executive officer of NYU Langone Health and dean of NYU Grossman School of Medicine.
Charles Daniel Johnson is an American radiologist.
Cheri L. Canon is an American abdominal radiologist at the University of Alabama at Birmingham (UAB) Department of Radiology. She currently serves as a professor and as the Witten-Stanley Endowed Chair of Radiology in the department of radiology at UAB.
Ann S. Fulcher is an American abdominal radiologist in the radiology department at Virginia Commonwealth University/Medical College of Medicine (VCU). She serves as a professor and the chair of the department of radiology at VCU.
Anna-Maria Belli, MD, FCIRSE is a British interventional radiologist known for her work in vascular interventional radiology and for holding leadership positions in interventional radiology societies in Britain and Europe.
Ali A Haydar is Lebanese physician who is an emeritus professor at the American University of Beirut and is the Chief Medical Officer at Aman Hospital, Doha, Qatar and previously the Chairman of radiology at the Clemenceau Medical Center affiliated with Johns Hopkins International since 2018. He is also a member of the Radiological Society of North America, British society of Interventional and Cardiovascular Radiology and the Cardiovascular and Interventional Radiological Society of Europe and fellow of the Pan Arab Interventional radiology society.
John R. Bentson was an American neuroradiologist who invented the Better Brain-Imaging Tool.
Timothy Michael Pawlik is an American surgical oncologist. He is Chair of the Department of Surgery and the Urban Meyer III and Shelley Meyer Chair for Cancer Research at The Ohio State University and Surgeon-in-Chief at The Ohio State University Wexner Medical Center.
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