Two items relevant to long COVID

One of the tricky issues in studying in long COVID is: how widely do researchers cast their net? Initial reports acknowledged that people who were hospitalized and in intensive care may take a while to get back on their feet. But the number of people who had SARS-CoV-2 infections and were NOT hospitalized, yet experienced lingering symptoms, may be greater. A recent report from the United Kingdom, published in PLOS Medicine, studied more than Read more

All your environmental chemicals belong in the exposome

Emory team wanted to develop a standard low-volume approach that would avoid multiple processing steps, which can lead to loss of material, variable recovery, and the potential for Read more

Signature of success for an HIV vaccine?

Efforts to produce a vaccine against HIV/AIDS have been sustained for more than a decade by a single, modest success: the RV144 clinical trial in Thailand, whose results were reported in 2009. Now Emory, Harvard and Case Western Reserve scientists have identified a gene activity signature that may explain why the vaccine regimen in the RV144 study was protective in some individuals, while other HIV vaccine studies were not successful. The researchers think that this signature, Read more

Carolyn Meltzer

Combined MR/PET imaging

On Thursday, April 8, Emory’s Center for Systems Imaging, directed by Department of Radiology Chair Carolyn Meltzer, MD, and the Atlanta Clinical & Translational Science Institute celebrated the launch of the CSI’s prototype MR/PET imaging scanner.

View of MR/PET

View of MR/PET scanner from front, with Ciprian Catana of MGH and Larry Byars of Siemens

The scanner is one of four world-wide and one of two in the United States, and permits simultaneous MR (magnetic resonance) and PET (positron emission tomography) imaging in human subjects. This provides the advantage of being able to combine the anatomical information from MR with the biochemical/metabolic information from PET. Potential applications include functional brain mapping and the study of neurodegenerative diseases, drug addiction and brain cancer.

Thursday’s event brought together leaders of the three other MR/PET programs in Boston, Jülich and Tübingen, the Siemens engineers who designed the device, and the Atlanta research community to explore the possibilities of the technology.

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Posted on by Quinn Eastman in Neuro Leave a comment

Medical imaging experts on quality and safety

Recently, a great deal of media coverage has focused on radiological services such as CT scans, and questions have been raised over the safety related to the increasing use of those services and the amount of radiation they deliver.

Medical imaging procedures, such as CT or CAT scans, are considered by experts to be highly useful for the diagnosis, treatment and monitoring of many medical conditions including cancer, heart disease, trauma, and liver and kidney disease. The recent increase in attention and exposure via the media is valuable, say Emory experts, in highlighting rapidly improving imaging technologies and the importance of ensuring such scans are performed in a setting where there is carefully monitoring to minimize associated radiation exposure.

CT scanner

CT scanner

Emory’s Department of Radiology is well-recognized for its expertise in all subspecialty areas of radiology and medical imaging, as well as its breadth and depth of medical physicists, researchers and educators.

Carolyn Meltzer, MD, William P. Timmie Professor and chair of the Department of Radiology in Emory’s School of Medicine, says, “Emory radiologists are the physician experts in imaging, most receiving more than 13 years of extensive training. In fact, radiologists receive substantive training in radiation biology and safety that is linked to their board certification.”

According to Kimberly Applegate, MD, vice chair of Quality and Safety for Emory’s Department of Radiology, commented on safety recently in the New England Journal of Medicine. She wrote in the article, “The medical community should continue to work together across disciplines to use existing knowledge about radiation protection to ensure that imaging is warranted and optimized.”

When patients do need imaging, they should ask if the imaging personnel are credentialed and the protocols used are weight-based and indication-based, to ensure quality, notes Applegate. Emory subspecialty radiologists work in multidisciplinary clinical teams to make sure that imaging is used appropriately, she adds.

In order to minimize radiation exposure, Emory Radiology adheres to the following guidelines: CT protocols are optimized by subspecialty-trained radiologists to ensure quality and safe imaging procedures. Further, explains Applegate, low radiation exam protocols are used when appropriate and CTs or X-rays are not performed on pregnant patients unless it is a medical emergency.

Further, in accordance with ACR (American College of Radiology) guidelines, Emory Radiology does not offer whole body screening CT exams. These tests result in unnecessary radiation and often lead to additional unneeded tests, says Applegate.

Click here for more information about radiation safety and what Emory is doing to educate all stakeholders in medical imaging and to ensure safe, high quality imaging. To learn more about medical imaging and expected radiation levels visit RadiologyInfo.

For a summary of the National Council on Radiation Protection and Measurements (NCRP) report on American radiation exposure from all sources, including medical imaging, visit The NCRP report 160: Ionizing Radiation Exposure of the Population of the United States (2009).

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