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Ann Nucl Med. 2018 Jun;32(5):319-327. doi: 10.1007/s12149-018-1250-3. Epub 2018 Mar 20.

Diagnostic value of quantitative assessment of cardiac 18F-fluoro-2-deoxyglucose uptake in suspected cardiac sarcoidosis.

Author information

1
Department of Nuclear Medicine, CHU de Caen, 14000, Caen, France.
2
Normandie Université, UNICAEN, EA4650 Signalisation, Électrophysiologie et Imagerie des Lésions d'Ischémie-Reperfusion Myocardique, 14000, Caen, France.
3
Department of Cardiology, CHU de Caen, 14000, Caen, France.
4
Department of Internal Medicine, CHU de Caen, 14000, Caen, France.
5
Department of Pulmonary Medicine, CHU de Caen, 14000, Caen, France.
6
Department of Nuclear Medicine, CHU de Caen, 14000, Caen, France. manrique@cyceron.fr.
7
Normandie Université, UNICAEN, EA4650 Signalisation, Électrophysiologie et Imagerie des Lésions d'Ischémie-Reperfusion Myocardique, 14000, Caen, France. manrique@cyceron.fr.
8
Cyceron PET Centre, 14000, Caen, France. manrique@cyceron.fr.

Abstract

OBJECTIVE:

The identification of cardiac sarcoidosis is challenging as there is no gold standard consensually admitted for its diagnosis. The aim of this study was to evaluate the diagnostic value of the assessment of cardiac dynamic 18F-fluoro-2-deoxyglucose positron emission tomography (18F-FDG PET/CT) and net influx constant (Ki) in patients suspected of cardiac sarcoidosis.

METHODS:

Data obtained from 30 biopsy-proven sarcoidosis patients suspected of cardiac sarcoidosis who underwent a 50-min list-mode cardiac dynamic 18F-FDG PET/CT after a 24 h high-fat and low-carbohydrate diet were analyzed. A normalized coefficient of variation of quantitative glucose influx constant, calculated as the ratio: standard deviation of the segmental Ki (min-1)/global Ki (min-1) was determined using a validated software (Carimas® 2.4, Turku PET Centre). Cardiac sarcoidosis was diagnosed according to the Japanese Ministry of Health and Welfare criteria. Receiving operating curve analysis was performed to determine sensitivity and specificity of cardiac dynamic 18F-FDG PET/CT analysis to diagnose cardiac sarcoidosis.

RESULTS:

Six out of 30 patients (20%) were diagnosed as having cardiac sarcoidosis. Myocardial glucose metabolism was significantly heterogeneous in patients with cardiac sarcoidosis who showed significantly higher normalized coefficient of variation values compared to patients without cardiac sarcoidosis (0.513 ± 0.175 vs. 0.205 ± 0.081; p = 0.0007). Using ROC curve analysis, we found a cut-off value of 0.38 for the diagnosis of cardiac sarcoidosis with a sensitivity of 100% and a specificity of 91%.

CONCLUSIONS:

Our results suggest that quantitative analysis of cardiac dynamic 18F-FDG PET/CT could be a useful tool for the diagnosis of cardiac sarcoidosis.

KEYWORDS:

Cardiac sarcoidosis; Dynamic acquisition; FDG; Positron emission tomography; Quantitative analysis

PMID:
29560563
DOI:
10.1007/s12149-018-1250-3
[Indexed for MEDLINE]

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