Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
What is the relationship between 18F-FDG aortic aneurysm uptake on PET/CT and future growth rate?
Ist Teil von
European journal of nuclear medicine and molecular imaging, 2011-08, Vol.38 (8), p.1493-1499
Ort / Verlag
Berlin/Heidelberg: Springer-Verlag
Erscheinungsjahr
2011
Link zum Volltext
Quelle
SpringerLink (Online service)
Beschreibungen/Notizen
Purpose
In this study we investigate the relationship between
18
F-fluorodeoxyglucose (FDG) metabolism and future aneurysm expansion measured by serial duplex ultrasound. Current screening programmes are increasing the identification of patients with abdominal aortic aneurysm (AAA). The management of these patients remains challenging and methods of risk stratification are sought.
Methods
Thirty-four consecutive patients [31 men, 3 women, median age 75 years, interquartile range (IQR) 71–78] with aortic aneurysms under routine surveillance with serial ultrasound were prospectively recruited for
18
F-FDG positron emission tomography (PET)/CT. A whole vessel type analysis was performed measuring the highest aortic wall
18
F-FDG uptake (standardized uptake value or SUV
max
), and target to background ratio (TBR) for each axial image and median SUV
max
and TBR value were calculated. Institutional Review Board permission and informed patient consent were obtained.
Results
Nine patients failed to undergo 12-month follow-up study (deceased
n
= 2, withdrew
n
= 1, failed to attend ultrasound scan
n
= 5, emergency aneurysm repair
n
= 1) leaving 25 patients for analysis. The median whole vessel SUV
max
was 1.70 (IQR 1.45–2.08). The median whole vessel TBR was 1.15 (IQR 1.00–1.40). The median aneurysm expansion at 12 months was 2.0 mm (IQR 0.5–5.0). The correlation (
r
) between
18
F-FDG SUV
max
and ultrasound expansion at 1 year was −0.501 (
p
= 0.011).
Conclusion
The preliminary findings from this observational longitudinal pilot study suggest that there is an inverse trend between
18
F-FDG uptake on PET and future AAA expansion. Aortic aneurysms with lower metabolic activity may therefore be more likely to expand.