Article (Scientific journals)
FDG PET/CT in Crohn's disease : correlation of quantitative FDG PET/CT parameters with clinical and endoscopic surrogate markers of disease activity
SABOURY, BABAK; SALAVATI, ALI; BROTHERS, ALEX et al.
2014In European Journal of Nuclear Medicine and Molecular Imaging, 41, p. 605-614
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Abstract :
[en] PURPOSE: The aim of this study was to determine the feasibility and potential clinical utility of assessment of Crohn's disease (CD) activity by 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT employing a new quantitative approach. METHODS: A total of 22 subjects (mean age 37) with CD who had undergone FDG PET/CT followed by ileocolonoscopy within 1 week were included in this analysis. The CD endoscopy index of severity (CDEIS) for various bowel segments was calculated. The CD activity index (CDAI) was evaluated, and fecal calprotectin was measured. On PET, regions with increased FDG uptake in large bowel were segmented with an adaptive contrast-oriented thresholding algorithm, and metabolically active volume (MAV), uncorrected mean standardized uptake value (SUVmean), partial volume-corrected SUVmean (PVC-SUVmean), SUVmax, uncorrected total lesion glycolysis (TLG = MAV x SUVmean), and PVC total lesion glycolysis (PVC-TLG = MAV x PVC-SUVmean) were measured. Global CD activity score (GCDAS) was calculated as the sum of PVC-TLG over all clinically significant FDG-avid regions in each subject. Correlations between regional PET quantification measures (SUVs, TLGs) and CDEIS were calculated. Correlations between the global PET quantification measure (GCDAS, global SUVs) with CDAI, fecal calprotectin, CDEIS, and CRP level were also calculated. RESULTS: SUVmax, PVC-SUVmean, and PVC-TLG significantly correlated with segment CDEIS subscores (r = 0.50, r = 0.69, and r = 0.31, respectively; p < 0.05). GCDAS significantly correlated with CDAI and fecal calprotectin (r = 0.64 and r = 0.51, respectively; p < 0.05). CONCLUSION: By employing this new quantitative approach, we were able to calculate indices of regional and global CD activity, which correlated well with both clinical and pathological disease activity surrogate markers. This approach may be of clinical importance in measuring both global disease activity and treatment response in patients with CD.
Disciplines :
Gastroenterology & hepatology
Radiology, nuclear medicine & imaging
Author, co-author :
SABOURY, BABAK;  University of Pennsylvania School of Medicine > Department of Radiology
SALAVATI, ALI;  University of Pennsylvania School of Medicine > Department of Radiology
BROTHERS, ALEX;  University of Pennsylvania School of Medicine > Department of Radiology
BASU, SANDIP;  University of Pennsylvania School of Medicine > Department of Radiology
KWEE, THOMAS;  university medical center Utrecht - Netherlands > Department of Radiology and Nuclear Medicine
LAM, MARNIX;  university medical center Utrecht - Netherlands > department of Radiology and Nuclear Medicine
HUSTINX, Roland  ;  Centre Hospitalier Universitaire de Liège - CHU > Service médical de médecine nucléaire et imagerie onco
LOUIS, Edouard  ;  Centre Hospitalier Universitaire de Liège - CHU > Gastro-Entérologie-Hépatologie
TORIGIAN, DREW;  University of Pennsylvania School of Medicine > Department of Radiology
ALAVI, ABASS;  Hospital of the University of Pennsylvania > Department of Radiology
Language :
English
Title :
FDG PET/CT in Crohn's disease : correlation of quantitative FDG PET/CT parameters with clinical and endoscopic surrogate markers of disease activity
Publication date :
2014
Journal title :
European Journal of Nuclear Medicine and Molecular Imaging
ISSN :
1619-7070
eISSN :
1619-7089
Publisher :
Springer, New York, United States - New York
Volume :
41
Pages :
605-614
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 03 January 2014

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