Multifactorial Relationship Between 18F-Fluoro-Deoxy-Glucose Positron Emission Tomography Signaling and Biomechanical Properties in Unruptured Aortic Aneurysms
[en] BACKGROUND: -The relationship between biomechanical properties and biological activities in aortic aneurysms was investigated with finite element simulations (FES) and 18F-fluoro-deoxyglucose (18F-FDG) positron emission tomography (PET). METHODS AND RESULTS: -The study included 53 patients (45 males) with aortic aneurysms, 47 infrarenal (AAA) and 6 thoracic (TAA), who had at least one 18F-FDG PET/computed tomography. Over a 30-month period, more clinical events occurred in patients with increased 18F-FDG uptake on their last examination than in those without (5/18 (28%) vs. 2/35 (6%); P=0.03). Wall stress and stress/strength index computed by FES and 18F-FDG uptake were evaluating a total of 68 examinations. 25 (38%) examinations demonstrated at least one aneurysm wall area of increased 18F-FDG uptake. The mean number of these areas per examination was 1.6 (18/11) in TAAs vs. 0.25 (14/57) in AAAs, while the mean number of increased uptake areas co-localizing with highest wall stress and stress/strength index areas was 0.55 (6/11) and 0.02 (1/57), respectively. Quantitatively, 18F-FDG PET uptake correlated positively with both wall stress and stress/strength index (P<0.05). 18F-FDG uptake was particularly high in subjects with personal history of angina pectoris and familial aneurysm. CONCLUSIONS: -Increased 18F-FDG PET uptake in aortic aneurysms is strongly related to aneurysm location, wall stress as derived by FES and patient's risk factors such as acquired and inherited susceptibilities.
Disciplines :
Surgery Radiology, nuclear medicine & imaging
Author, co-author :
NCHIMI LONGANG, Alain ; Centre Hospitalier Universitaire de Liège - CHU > Radiodiagnostic
CHERAMY-BIEN, Jean-Paul ; Centre Hospitalier Universitaire de Liège - CHU > Chirurgie cardio-vasculaire
Gasser, Thomas Christian
NAMUR, Gauthier ; Centre Hospitalier Universitaire de Liège - CHU > Médecine nucléaire et imagerie oncologique
Gomez, Pierre
SEIDEL, Laurence ; Centre Hospitalier Universitaire de Liège - CHU > Service d'Informations médico économiques (SIME)
Albert, Adelin ; Université de Liège - ULiège > Département des sciences de la santé publique > Département des sciences de la santé publique
Defraigne, Jean-Olivier ; Université de Liège - ULiège > Département des sciences cliniques > Chirurgie cardio-vasculaire et thoracique
Labropoulos, Nicos
Sakalihasan, Natzi ; Centre Hospitalier Universitaire de Liège - CHU > Chirurgie cardio-vasculaire
Language :
English
Title :
Multifactorial Relationship Between 18F-Fluoro-Deoxy-Glucose Positron Emission Tomography Signaling and Biomechanical Properties in Unruptured Aortic Aneurysms
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