News | PET Imaging | June 16, 2021

SNMMI's Image of the Year is a detailed depiction of areas of cognitive impairment, neurological symptoms and comparison of impairment over a six-month time frame

SNMMI's Image of the Year is a detailed depiction of areas of cognitive impairment, neurological symptoms and comparison of impairment over a six-month time frame

Figure 1. A: COVID-19-related spatial covariance pattern of cerebral glucose metabolism overlaid onto an MRI template. Voxels with negative region weights are color-coded in cool colors, and regions with positive region weights in hot colors. B: Association between the expression of COVID-19-related covariance pattern and the Montreal Cognitive Assessment (MoCA) score adjusted for years of education. Each dot represents individual patient. C: Results of a statistical parametric mapping analysis. Upper row illustrates regions that show significant increases of normalized FDG uptake in COVID-19 patients at 6-months follow-up compared to the subacute stage (paired t test, p < 0.01, false discovery rate-corrected). Bottom row depicts regions that still show significant decreases of normalized FDG uptake in COVID-19 patients at 6-months follow-up compared to the age-matched control cohort at an exploratory statistical threshold (two-sample t test, p < 0.005). Image Credit: G Blazhenets et al., Department of Nuclear Medicine, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg


June 16, 2021 — The effects of COVID-19 on the brain can be accurately measured with positron emission tomography (PET), according to research presented at the Society of Nuclear Medicine and Molecular Imaging (SNMMI) 2021 Annual Meeting. In the study, newly diagnosed COVID-19 patients, who required inpatient treatment and underwent PET brain scans, were found to have deficits in neuronal function and accompanying cognitive impairment, and in some, this impairment continued six months after their diagnosis. The detailed depiction of areas of cognitive impairment, neurological symptoms and comparison of impairment over a six-month time frame has been selected as SNMMI’s 2021 Image of the Year.

Each year, SNMMI chooses an image that best exemplifies the most promising advances in the field of nuclear medicine and molecular imaging. The state-of-the-art technologies captured in these images demonstrate the capacity to improve patient care by detecting disease, aiding diagnosis, improving clinical confidence, and providing a means of selecting appropriate treatments. This year, the SNMMI Henry N. Wagner, Jr., Image of the Year was chosen from more than 1,280 abstracts submitted to the meeting and voted on by reviewers and the society leadership.

“As the SARS-CoV-2 pandemic proceeds, it has become increasingly clear that neurocognitive long-term consequences occur not only in severe COVID-19 cases, but in mild and moderate cases as well. Neurocognitive deficits like impaired memory, disturbed concentration and cognitive problems may persist well beyond the acute phase of the disease,” said Ganna Blazhenets, Ph.D., a post-doctoral researcher in Medical Imaging at the University Medical Center Freiburg, in Freiburg, Germany.

To study cognitive impairment associated with COVID-19, researchers carried out a prospective study on recently diagnosed COVID-19 patients who required inpatient treatment for non-neurological complaints. A cognitive assessment was performed, followed by imaging with 18F-FDG PET if at least two new neurological symptoms were present. By comparing COVID-19 patients to controls, the Freiburg group established a COVID-19-related covariance pattern of brain metabolism with most prominent decreases in cortical regions. Across patients, the expression of this pattern showed a very high correlation with the patients’ cognitive performance.

Follow-up PET imaging was performed six months after the initial COVID-19 diagnosis. Imaging results showed a significant improvement in the neurocognitive deficits in most patients, accompanied by an almost complete normalization of the brain metabolism.

“We can clearly state that a significant recovery of regional neuronal function and cognition occurs for most COVID-19 patients based on the results of this study. However, it is important to recognize the evidence of longer-lasting deficits in neuronal function and accompanying cognitive deficits is still measurable in some patients six months after manifestation of disease,” noted Blazhenets. “As a result, post-COVID-19 patients with persistent cognitive complaints should be presented to a neurologist and possibly allocated to cognitive rehabilitation programs.”

18F-FDG PET is an established biomarker of neuronal function and neuronal injury,” stated SNMMI’s Scientific Program Committee chair, Umar Mahmood, MD, PhD. “As shown the Image of the Year, it can be applied to unravel neuronal correlates of the cognitive decline in patients after COVID-19. Since 18F-FDG PET is widely available, it may therefore aid in the diagnostic work-up and follow-up in patients with persistent cognitive impairment after COVID-19.”

For more information: www.snmmi.org

Related information from SNMMI21

Related Content

News | Radiology Business

June 29, 2022 — Siemens Healthineers and The Ohio State University Wexner Medical Center announced a new alliance, aimed ...

Time June 29, 2022
arrow
News | Proton Therapy

June 27, 2022 — Varian, a Siemens Healthineers company, announced that the U.S. Food and Drug Administration (FDA) ...

Time June 28, 2022
arrow
News | Radiation Therapy

June 24, 2022 — Recently, a collaborated research team led by Prof. LI Hai and Hongzhi Wang from Hefei Institutes of ...

Time June 24, 2022
arrow
News | Contrast Media

June 23, 2022 — Supply chain disruptions have created critical shortages of Omnipaque (iohexol) and Visipaque (iodixanol ...

Time June 23, 2022
arrow
News | Radiation Therapy

June 23, 2022 — RaySearch Laboratories AB announced the release of the latest version of RayCare*, the next generation ...

Time June 23, 2022
arrow
News | SNMMI

June 22, 2022 — The Society of Nuclear Medicine and Molecular Imaging recognized 15 new SNMMI Fellows on Monday, June 13 ...

Time June 22, 2022
arrow
News | SNMMI

June 22, 2022 — Andrei Iagaru, MD, FACNM, professor of radiology (nuclear medicine) and chief of the Division of Nuclear ...

Time June 22, 2022
arrow
News | PET Imaging

June 21, 2022 — Markus Schwaiger, MD, a scientist known for his contributions to cardiac PET imaging, has been named as ...

Time June 21, 2022
arrow
News | Radiology Imaging

June 21, 2022 — After less than two years of data collection and processing, the Radiological Society of North America ...

Time June 21, 2022
arrow
News | SNMMI

June 21, 2022 — Krystle W. Glasgow, MIS, CNMT, NMTCB(CT), NMAA, FSNMMI-TS, instructor and clinical coordinator at the ...

Time June 20, 2022
arrow
Subscribe Now