1897-1997 Les cent ans de la section des Eaux et Forêts
in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (1997), 1(4), 236-238Detailed reference viewed: 22 (5 ULg)
1897-1997, 100 ans de Chimie et Industries agricoles
Wathelet, Bernard ;
Book (2000)Detailed reference viewed: 10 (3 ULg)
18F LABELING OF BIOMOLECULES USING CLICK CHEMISTRY FOR PET APPLICATIONS : SYNTHETIC DEVELOPMENTS
Thonon, David ; Flagothier, Jessica ; Paris, Jérôme et al
in Drugs of the Future (2008, August), 33(A), 235Detailed reference viewed: 90 (17 ULg)
(18F)FPRGD2 PET/CT imaging of integrin αvβ3 in renal carcinomas : correlation with histopathology.
WITHOFS, Nadia ; ; et al
in Journal of Nuclear Medicine (The) (2012), 53(SUPPL), 1647Detailed reference viewed: 29 (8 ULg)
18f-Fdg Pet Imaging in Assessing Exudative Pleural Effusions
DUYSINX, Bernard ; Larock, Marie-Paule ; et al
in Nuclear Medicine Communications (2006), 27(12), 971-6
BACKGROUND: This study evaluates the accuracy of [F]fluorodeoxyglucose positron emission tomography (F-FDG PET) imaging with semi-quantitative analysis for differentiating benign from malignant pleural ... [more ▼]
BACKGROUND: This study evaluates the accuracy of [F]fluorodeoxyglucose positron emission tomography (F-FDG PET) imaging with semi-quantitative analysis for differentiating benign from malignant pleural exudates and for guiding the search for the primary tumour of pleural metastases. METHODS: Whole-body 18F-FDG PET was performed in 79 patients with exudative pleurisy. Standard uptake values were normalized for body weight, body surface area, lean body mass (SUVbw, SUVbsa, SUVlbm) with and without correction for blood glucose levels. Thoracoscopy was systematically performed to reveal pathological diagnosis. RESULTS: All SUVs were significantly higher in all malignant pleural diseases (n = 51) than in benign (n = 28) (P < 0.001). Moreover SUVs were greater in the pleural metastases from pulmonary primaries (n = 25) and in mesotheliomas (n = 8) than in extrathoracic primaries (n = 18) (P < 0.01) with no significant difference between lung cancers and mesotheliomas. Receiver operating curve (ROC) analysis between benign and malignant lesions showed areas under the curves that ranged from 0.803 (SUVbsa g) to 0.863 (SUVbw). The cut-off value for SUVbw which gave the best accuracy (82.3%) was 2.2. When comparing thoracic with extrathoracic primaries the highest accuracy (80.4%) was found for a cut-off value of 2.6. CONCLUSION: Semi-quantitative analysis of 18F-FDG PET imaging helps to differentiate malignant from benign pleural exudates and to distinguish between thoracic or extrathoracic primaries. [less ▲]Detailed reference viewed: 111 (31 ULg)
18F-FDG PET Uptake Characterization Through Texture Analysis: Investigating the Complementary Nature of Heterogeneite and Functional Tumor Volume in a Multi-Cancer Site Patient Cohort
; ; et al
in Journal of Nuclear Medicine (The) (2015), 56(1), 38-44Detailed reference viewed: 20 (2 ULg)
18F-FDG PET/CT in the Management of Aortitis.
; Courtois, Audrey ; Nusgens-Richelle, Betty et al
in Clinical nuclear medicine (2015)
BACKGROUND: Aortitis is a generic term defined as an inflammatory condition involving the aortic wall, of infectious or noninfectious origin. This inflammatory process may deteriorate the aortic wall ... [more ▼]
BACKGROUND: Aortitis is a generic term defined as an inflammatory condition involving the aortic wall, of infectious or noninfectious origin. This inflammatory process may deteriorate the aortic wall, resulting in potentially life-threatening vascular complications. Therefore, it is important to establish a diagnosis as early as possible. PATIENTS AND METHODS: During a 4-year period, 428 consecutive patients referred to our department for aortic diseases underwent FDG PET/CT examinations. Among these, 18 patients (4.2%) were suspected to have aortitis. All of them had an initial positive FDG PET/CT uptake occurring in the aorta and major branches as evaluated by visual analysis of images and assessed with the final diagnosis of aortitis. During follow-up, after surgery and/or upon immunosuppressive treatment, each of these patients underwent a second PET/CT that was compared with the initial evaluation. In all cases, normalization of FDG uptake was correlated with clinical improvement. CONCLUSIONS: Our study aimed to illustrate the potential clinical value of functional monitoring with PET/CT in the management of aortitis. FDG PET/CT constitutes a valuable imaging modality to establish an early diagnosis, monitor disease progression and treatment, and evaluate vascular complication and relapse. We highlight the importance of an early detection of inflammatory large-vessel pathology, which may represent a major threat. [less ▲]Detailed reference viewed: 72 (14 ULg)
18F-FDG Uptake Assessed by PET/CT in Abdominal Aortic Aneurysms Is Associated with Cellular and Molecular Alterations Prefacing Wall Deterioration and Rupture.
Courtois, Audrey ; Richelle, Betty ; Hustinx, Roland et al
in Journal of Nuclear Medicine (The) (2013), 54
Rupture of abdominal aortic aneurysms (AAAs) leads to a significant morbidity and mortality in aging populations, and its prediction would be most beneficial to public health. Spots of positive uptake of ... [more ▼]
Rupture of abdominal aortic aneurysms (AAAs) leads to a significant morbidity and mortality in aging populations, and its prediction would be most beneficial to public health. Spots of positive uptake of 18F-FDG detected by PET are found in 12% of AAA patients (PET+), who are most often symptomatic and at high rupture risk. Comparing the 18F-FDG-positive site with a negative site from the same aneurysm and with samples collected from AAA patients with no 18F-FDG uptake should allow the discrimination of biologic alterations that would help in identifying markers predictive of rupture. METHODS: Biopsies of the AAA wall were obtained from patients with no 18F-FDG uptake (PET0, n = 10) and from PET+ patients (n = 8), both at the site of positive uptake and at a distant negative site of the aneurysmal wall. Samples were analyzed by immunohistochemistry, quantitative real-time polymerase chain reaction, and zymography. RESULTS: The sites of the aneurysmal wall with a positive 18F-FDG uptake were characterized by a strikingly increased number of adventitial inflammatory cells, highly proliferative, and by a drastic reduction of smooth muscle cells (SMCs) in the media as compared with their negative counterpart and with the PET0 wall. The expression of a series of genes involved in the maintenance and remodeling of the wall was significantly modified in the negative sites of PET+, compared with the PET0 wall, suggesting a systemic alteration of the aneurysmal wall. Furthermore, a striking increase of several matrix metalloproteinases (MMPs), notably the MMP1 and MMP13 collagenases, was observed in the positive sites, mainly in the adventitia. Moreover, PET+ patients were characterized by a higher circulating C-reactive protein. CONCLUSION: Positive 18F-FDG uptake in the aneurysmal wall is associated with an active inflammatory process characterized by a dense infiltrate of proliferating leukocytes in the adventitia and an increased circulating C-reactive protein. Moreover, a loss of SMC in the media and alterations of the expression of genes involved in the remodeling of adventitia and collagen degradation potentially participate in the weakening of the aneurysmal wall preceding rupture. [less ▲]Detailed reference viewed: 108 (40 ULg)
18F-fluoride PET/CT for assessing bone involvement in prostate and breast cancers
Withofs, Nadia ; Grayet, Benjamin ; Tancredi, Tino et al
in Nuclear Medicine Communications (2011), 32(3), 168-176Detailed reference viewed: 73 (29 ULg)
18F-fluoro-L-tyrosine : a potential tracer for whole-body tumor imaging with PET.
HUSTINX, Roland ; ; JERUSALEM, Guy et al
in Journal of Nuclear Medicine (The) (2002), 43Detailed reference viewed: 12 (3 ULg)
18F-flutemetamol amyloid imaging in Alzheimer disease and mild cognitive impairment: a phase 2 trial.
; ; et al
in Annals of Neurology (2010), 68(3), 319-329
Objective: The most widely studied positron emission tomography ligand for in vivo -amyloid imaging is 11CPittsburgh compound B (11C-PIB). Its availability, however, is limited by the need for an on-site ... [more ▼]
Objective: The most widely studied positron emission tomography ligand for in vivo -amyloid imaging is 11CPittsburgh compound B (11C-PIB). Its availability, however, is limited by the need for an on-site cyclotron. Validation of the 18F-labeled PIB derivative 18F-flutemetamol could significantly enhance access to this novel technology. Methods: Twenty-seven patients with early-stage clinically probable Alzheimer disease (AD), 20 with amnestic mild cognitive impairment (MCI), and 15 cognitively intact healthy volunteers (HVs) above and 10 HVs below 55 years of age participated. The primary endpoint was the efficacy of blinded visual assessments of 18F-flutemetamol scans in assigning subjects to a raised versus normal uptake category, with clinical diagnosis as the standard of truth (SOT). As secondary objectives, we determined the correlation between the regional standardized uptake value ratios (SUVRs) for 18F-flutemetamol and its parent molecule 11C-PIB in 20 of the AD subjects and 20 of the MCI patients. We also determined test-retest variability of 18F-flutemetamol SUVRs in 5 of the AD subjects. Results: Blinded visual assessments of 18F-flutemetamol scans assigned 25 of 27 scans from AD subjects and 1 of 15 scans from the elderly HVs to the raised category, corresponding to a sensitivity of 93.1% and a specificity of 93.3% against the SOT. Correlation coefficients between cortical 18F-flutemetamol SUVRs and 11C-PIB SUVRs ranged from 0.89 to 0.92. Test-retest variabilities of regional SUVRs were 1 to 4%. Interpretation: 18F-Flutemetamol performs similarly to the 11C-PIB parent molecule within the same subjects and provides high test-retest replicability and potentially much wider accessibility for clinical and research use. [less ▲]Detailed reference viewed: 57 (10 ULg)
18F-FMT: a reliable PET tracer for in vivo evaluation of dopaminergic dysfunction in Parkinson’s Disease rat model.
Becker, Guillaume ; Bahri, Mohamed Ali ; et al
Poster (2015, March 18)
Objectives: Rat models of Parkinson’s disease (PD), such as lesioned rats with 6-hydroxydopamine (6-OHDA), are useful for studying dopamine (DA)-related functions. 6-18F-fluoro-m-tyrosine (6-18F-FMT) is ... [more ▼]
Objectives: Rat models of Parkinson’s disease (PD), such as lesioned rats with 6-hydroxydopamine (6-OHDA), are useful for studying dopamine (DA)-related functions. 6-18F-fluoro-m-tyrosine (6-18F-FMT) is an effective PET tracer to evaluate of DA terminals integrity and L-aromatic amino acid decarboxylase (AAAD) metabolic pathway. However, there are currently no available quantitative PET studies using 18F-FMT in 6-OHDA lesioned rats. In this context, we investigated the feasibility of in vivo PET study using 18F-FMT on 6-OHDA PD’s model. Methods: 10 µg of 6-OHDA were injected into the right medial forebrain bundle (MFB) of male Sprague-Dawley rats (n=8). As control, sham-treated rats (n=8) were injected with vehicle only but otherwise treated identically. Striatal DA presynaptic activity was assessed by dynamic 18F-FMT-PET. Structural T2-weighted brain images were acquired on a 9.4T MRI and were used for co-registration. After normalization on a MRI template, kinetic analysis was performed by “Patlak Reference” model, using PMOD software. Results: Striatal accumulation of 18F-FMT was observed in rats pretreated with benserazide, a peripheral AAAD inhibitor. As consequence of the 6-OHDA-lesion, significant decrease of 18F-FMT accumulation was recorded in the striatum ipsilateral to the lesion. Lesioned rats had dramatically reduced uptake constant Ki in the ipsilateral striatum compared to the contralateral striatum (p<0.001) and to the ipsilateral striatum of sham-treated rats (p<0.005). The Ki ratio (Ipsi./Contra.) was equivalent to 94% in the sham group and dropped to 41% in the lesioned group. Conclusions: 18F-FMT PET enables us to quantify loss of DA presynaptic function in unilaterally 6-OHDA lesioned rats. These results encourage us to pursue further investigations in a longitudinal way and to monitor the progression of the dopaminergic dysfunction in more moderate and gradual preclinical PD models. [less ▲]Detailed reference viewed: 37 (3 ULg)
18F-FPRGD2 PET/CT imaging of integrin αvβ3 in renal carcinomas: Correlation with histopathology
WITHOFS, Nadia ; ; SOMJA, Joan et al
in Journal of Nuclear Medicine (The) (2015)Detailed reference viewed: 50 (13 ULg)
18F-MPPF Pharmacokinetics in rat hippocampus imaged with MicroPet.
; ; et al
in Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine (2002), 43(S1), 209Detailed reference viewed: 27 (0 ULg)
18F-substituted aromatic aldehydes, key intermediates for nca radiosyntheses.
Lemaire, Christian ; ; Plenevaux, Alain et al
in Journal of Labelled Compounds & Radiopharmaceuticals (1991), 30Detailed reference viewed: 20 (0 ULg)
18F-tyrosine PET in Neurooncology : an alternative to 11C-methionine.
; ; et al
in Journal of Nuclear Medicine (The) (2004), 45(SUPPL), 264Detailed reference viewed: 9 (0 ULg)
18F9 (4-(3,6-bis (ethoxycarbonyl)-4,5,6,7-tetrahydrothieno (2,3-c) pyridin-2-ylamino)-4-oxobutanoic acid) enhances insulin-mediated glucose uptake in vitro and exhibits antidiabetic activity in vivo in db/db mice
Sayyed, Sufyan Ali
in Metabolism : Clinical and Experimental (2009), 58(10), 1503Detailed reference viewed: 18 (0 ULg)
[18F]Altansérine: nouveau radioligand des récepteurs sérotoninergiques pour la tomographie par émission de positons (TEP)
Lemaire, Christian ; Sadzot, Bernard ; et al
Poster (1990, August 22)Detailed reference viewed: 21 (2 ULg)
[18F]fallypride binding in the mouse brain: test-retest and effects of registration
Bahri, Mohamed Ali ; Geuzaine, Annabelle ; Warnock, Geoffrey et al
Conference (2011, January 17)
The quantification of in vivo receptor kinetics with PET tracer experiments is an intricate and challenging problem especially for small animals such as rats and mice. A test-retest scan is usually set up ... [more ▼]
The quantification of in vivo receptor kinetics with PET tracer experiments is an intricate and challenging problem especially for small animals such as rats and mice. A test-retest scan is usually set up in order to confirm an observed experimental effect or to examine the reliability of the experiment design. Inadequate processing of the image data may also mask small effects. The purpose of this study was to investigate the effect of image registration on [18F]fallypride binding potentials calculated from PET mouse test-retest data. Sub-optimal registration affected the quantification of in vivo receptor kinetics with [18F]fallypride. The absence of anatomical information in the [18F]fallypride image and the lack of a homogeneous tracer distribution, even during the earlier minutes of the scan, lead to erroneous automatic registration. A FDG scan after each [18F]fallypride test could improve registration as FDG provides a more homogeneous brain image. Variability in the data could also result from stress induced by anaesthesia or the experimental environment. [less ▲]Detailed reference viewed: 149 (25 ULg)