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Simultaneous hybrid CMR/FDG-PET imaging useful for cardiac sarcoidosis detection: Study

MedhaBy MedhaPublished On 2021-10-29T09:15:24+05:30  |  Updated On 2021-10-29T10:45:32+05:30
Simultaneous hybrid CMR/FDG-PET imaging useful for cardiac sarcoidosis detection: Study

Germany: Simultaneous hybrid CMR/FDG-PET imaging is an optimal noninvasive tool for the detection of cardiac sarcoidosis (CS) and additionally identifies active disease, a recent study has found. The results, published in the journal JACC: Cardiovascular Imaging, may have implications for enhanced diagnosis and improved identification of active (aCS) patients in whom anti-inflammatory therapy...

Germany: Simultaneous hybrid CMR/FDG-PET imaging is an optimal noninvasive tool for the detection of cardiac sarcoidosis (CS) and additionally identifies active disease, a recent study has found. The results, published in the journal JACC: Cardiovascular Imaging, may have implications for enhanced diagnosis and improved identification of active (aCS) patients in whom anti-inflammatory therapy may be most beneficial. 

FDG-PET and late gadolinium enhancement (LGE) CMR are both established imaging techniques for CS detection. However, there is not much data on the value of a comprehensive simultaneous hybrid CMR/FDG-PET imaging approach that includes CMR mapping techniques. 

Simon Greulich, Department of Cardiology and Angiology, University of Tübingen, Tübingen, Germany, and colleagues performed the study with an objective to investigate the diagnostic value of simultaneous hybrid cardiac magnetic resonance (CMR) and 18F-fluorodeoxyglucose positron emission tomography (FDG-PET) for detection and differentiation of active (aCS) from chronic (cCS) cardiac sarcoidosis.

For achieving their objective, the researchers prospectively enrolled 43 patients with biopsy-proven extracardiac sarcoidosis (median age: 48 years, 65% male) for evaluation of suspected CS. Patients were evaluated on a 3-T hybrid PET/MR scanner after dietary preparation for suppression of myocardial glucose metabolism. The CMR protocol included T1 and T2 mapping, myocardial function, and LGE imaging.

The researchers assumed aCS if PET and CMR (ie, LGE or T1/T2 mapping) were both positive (PET+/CMR+), cCS if PET was negative but CMR was positive (PET−/CMR+), and no CS if patients were CMR negative regardless of PET findings. 

Based on the study, the researchers found the following:

  • Among the 43 patients, myocardial glucose uptake was suppressed successfully in 36 (84%).
  • Hybrid CMR/FDG-PET revealed aCS in 36% patients, cCS in 14% patients, and no CS in 50% patients.
  • LGE was present in 39% of patients; T1 mapping was abnormal in 27% of patients and T2 mapping was abnormal in 6% of patients.
  • CS was diagnosed based on abnormal T1 mapping in 4 out of 18 CS patients (22%) who were LGE negative.
  • PET FDG uptake was present in 47% of patients.

Reference:

The study titled, "Hybrid Cardiac Magnetic Resonance/Fluorodeoxyglucose Positron Emission Tomography to Differentiate Active From Chronic Cardiac Sarcoidosis," is published in the journal JACC: Cardiovascular Imaging.

DOI: https://www.jacc.org/doi/10.1016/j.jcmg.2021.08.018

JACC cardiac sarcoidosis Cardiac magnetic resonance FDG-PET 
Source : JACC: Cardiovascular Imaging
Medha
Medha

    Medha Baranwal joined Medical Dialogues as an Editor in 2018 for Speciality Medical Dialogues. She covers several medical specialties including Cardiac Sciences, Dentistry, Diabetes and Endo, Diagnostics, ENT, Gastroenterology, Neurosciences, and Radiology. She has completed her Bachelors in Biomedical Sciences from DU and then pursued Masters in Biotechnology from Amity University. She has a working experience of 5 years in the field of medical research writing, scientific writing, content writing, and content management. She can be contacted at  editorial@medicaldialogues.in. Contact no. 011-43720751

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