Automated platform for the quality control of PET-CT scanners following AFCN/FANC recommendations
Bernard, Claire ; ; JODOGNE, Sébastien et al
in Proceedings of the Belgian Hospital Physicists Association Symposium (2013, February)Detailed reference viewed: 35 (15 ULg)
Nanomédecines et micromédecines pour la radiothérapie vectorisée appliquée au traitement du Carcinome Hepato-Cellulaire
Verger, Elise ; ; et al
Poster (2013)Detailed reference viewed: 23 (2 ULg)
Nanomedicines and micromedicines for vectorised radiotherapy of Hepatocellular Carcinoma
Verger, Elise ; ; et al
Poster (2013)Detailed reference viewed: 24 (3 ULg)
Image of the month: Neurogenic myositis ossificans
; ; et al
in Revue Médicale de Liège (2013), 68(2), 53-5Detailed reference viewed: 6 (1 ULg)
(111)Indium-oxine labelling for evaluating the homing process of autologous osteoblasts implanted percutaneously in atrophic nonunion fractures.
; Bernard, Claire ; et al
in International Orthopaedics (2013), 37(1), 131-6
PURPOSE: The aim of the study was to control the in vivo localisation of implanted cells in cell-based therapies. Labelling cells with (111)indium-oxine is one of the most interesting methods proposed. We ... [more ▼]
PURPOSE: The aim of the study was to control the in vivo localisation of implanted cells in cell-based therapies. Labelling cells with (111)indium-oxine is one of the most interesting methods proposed. We evaluated this method in the setting of autologous osteoblast implantation in nonunion fractures. METHODS: An in vitro study of osteoblasts was conducted after (111)indium-oxine labelling. Radioactivity retention and viability, proliferation and the ability to produce alkaline phosphatase were evaluated in a seven-day culture. In vivo labelling of implanted osteoblastic cells was conducted during a therapeutic trial of atrophic nonunion fractures, with the leakage outside the nonunion site and local uptake evolution at four, 24 and 48 hour being studied. RESULTS: The mean labelling efficiency for osteoprogenitors was 78.8 +/- 4.6 %. The intracellular retention was 89.4 +/- 2.1 % at three hours and 67.3 +/- 4.7 % at 18 hours. The viability assessed at three hours was 93.7 +/- 0.6 %. After seven days of culture, morphology and alkaline phosphatase staining were similar for both labelled and unlabelled control cells, although the proliferation rate was decreased in the labelled cells. Some local intraosseous leakage was observed in four of 17 cases. All patients showed uptake at the injection site, with four having no other uptake. Four patients showed additional uptake in the bladder, liver and spleen, while 11 patients had additional uptake in the lungs in addition to the bladder, liver and spleen. The activity ratios (injection site/body) were 48 +/- 28 % at four hours, 40 +/- 25 % at 24 hours and 35 +/- 25 % at 48 hours. After correcting for decay, the activity within the injection site was 82 +/- 15 % at 24 hours and 69 +/- 11 % at 48 hours compared with the activity measured at four hours. No relationship was found between uptake and radiological bone repair. CONCLUSIONS: The (111)indium-oxine labelling appears to be a good method for monitoring the behaviour of the osteoblastic cells after their implantation in atrophic nonunion fractures. [less ▲]Detailed reference viewed: 124 (34 ULg)
Prognostic value of FDG PET/CT in patients with hepatocellular carcinoma treated with liver transplantation.
; DETRY, Olivier ; BLETARD, Noëlla et al
in European Journal of Nuclear Medicine and Molecular Imaging (2013), 2013(SUPPL), 287Detailed reference viewed: 8 (2 ULg)
Imaging osteoarthritis using (18F)FPRGD2 PET/CT : observation and potential application.
WITHOFS, Nadia ; ALVAREZ MIEZENTSEVA, Victoria ; SIMONI, Paolo et al
in Journal of Nuclear Medicine (The) (2013), 54(SUPPL), 250Detailed reference viewed: 14 (3 ULg)
Prognostic value of FDG PET/CT in patients with lung tumors treated by Cyberknife.
LOVINFOSSE, Pierre ; JANVARY, Zsolt Levente ; JANSEN, Nicolas et al
in Journal of Nuclear Medicine (The) (2013), 54(SUPPL), 567Detailed reference viewed: 31 (6 ULg)
L'image du mois: La myosite ossifiante neurogene.
; ; et al
in Revue medicale de Liege (2013), 68(2), 53-5Detailed reference viewed: 28 (10 ULg)
Multiclass classification of FDG PET scans for the distinction between Parkinson's disease and atypical parkinsonian syndromes
Garraux, Gaëtan ; Phillips, Christophe ; Schrouff, Jessica et al
in NeuroImage: Clinical (2013), 2
Most available pattern recognition methods in neuroimaging address binary classification problems. Here, we used relevance vector machine (RVM) in combination with booststrap resampling (‘bagging’) for ... [more ▼]
Most available pattern recognition methods in neuroimaging address binary classification problems. Here, we used relevance vector machine (RVM) in combination with booststrap resampling (‘bagging’) for non-hierarchical multiclass classification. The method was tested on 120 cerebral 18fluorodeoxyglucose (FDG) positron emission tomography (PET) scans performed in patients who exhibited parkinsonian clinical features for 3.5 years on average but that were outside the prevailing perception for Parkinson's disease (PD). A radiological diagnosis of PD was suggested for 30 patients at the time of PET imaging. However, at follow-up several years after PET imaging, 42 of them finally received a clinical diagnosis of PD. The remaining 78 APS patients were diagnosed with multiple system atrophy (MSA, N = 31), progressive supranuclear palsy (PSP, N = 26) and corticobasal syndrome (CBS, N = 21), respectively. With respect to this standard of truth, classification sensitivity, specificity, positive and negative predictive values for PD were 93% 83% 75% and 96%, respectively using binary RVM (PD vs. APS) and 90%, 87%, 79% and 94%, respectively, using multiclass RVM (PD vs. MSA vs. PSP vs. CBS). Multiclass RVM achieved 45%, 55% and 62% classification accuracy for, MSA, PSP and CBS, respectively. Finally, a majority confidence ratio was computed for each scan on the basis of class pairs that were the most frequently assigned by RVM. Altogether, the results suggest that automatic multiclass RVM classification of FDG PET scans achieves adequate performance for the early differentiation between PD and APS on the basis of cerebral FDG uptake patterns when the clinical diagnosis is felt uncertain. This approach cannot be recommended yet as an aid for distinction between the three APS classes under consideration. [less ▲]Detailed reference viewed: 74 (14 ULg)
Newer Methods for Improving Yield from FDG-PET Imaging for Accurate Staging, Determining Tumor Biology, and Assessing Prognosis
in PET Clinics (2012), 7(4), 425-430Detailed reference viewed: 8 (1 ULg)
Cluster headache Award 2012: Central modulation in cluster headache patients treated with occipital nerve stimulation
MAGIS, Delphine ; Bruno, Marie-Aurélie ; FUMAL, Arnaud et al
in Journal of Headache & Pain (2012, September 16)Detailed reference viewed: 33 (6 ULg)
Primary hyperparathyroidism confirmed by histology : sensitivity and predictors of 99mTc-Sestamibi/CT scan
VALDES SOCIN, Hernan Gonzalo ; BISOGNI, Carmen ; BETEA, Daniela et al
in Abstract Book - 13th International Workshop on Multiple Endocrine Neoplasia (2012, September)Detailed reference viewed: 38 (7 ULg)
Zolpidem effect on recovery of consciousness: a FDG-PET study
Chatelle, Camille ; Thibaut, Aurore ; Gosseries, Olivia et al
Poster (2012)Detailed reference viewed: 7 (0 ULg)
Preliminary results of (18F)FPRGD2 PET/CT imaging of integrin αvβ3 levels in patients with locally advanced rectal carcinoma.
WITHOFS, Nadia ; MARTINIVE, Philippe ; SCAGNOL, Irène et al
in Journal of Nuclear Medicine (The) (2012), 53(SUPPL), 1703Detailed reference viewed: 51 (29 ULg)
Nodal staging of head and neck squamous cell carcinomas : impact of a dedicated PET/CT protocol.
; CABAY, Jean-Evrard ; DEMEZ, Pierre et al
in Journal of Nuclear Medicine (The) (2012), 53(SUPPL), 1354Detailed reference viewed: 19 (1 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)
Acute intramural haematoma of the ascending aorta.
; WITHOFS, Nadia ; et al
in European Journal of Nuclear Medicine and Molecular Imaging (2012), 39(8), 1368-9Detailed reference viewed: 13 (1 ULg)
PET-CT and PET-MRI in Oncology, A practical Guide: Gastrointestinal (135-159)
in PELLER, PATRICK; SUBRAMANIAM, RATHAN; GUERMAZI, ALI (Eds.) MEDICAL RADIOLOGY - DIAGNOSIS IMAGING : PET-CT and PET-MRI in Oncology - A pratical Guide (2012)
PET-CT combines in a single imaging session both anatomical and metabolic information. Depending on the strategy, the CT part of the study may yield only crude anatomical information and attenuation ... [more ▼]
PET-CT combines in a single imaging session both anatomical and metabolic information. Depending on the strategy, the CT part of the study may yield only crude anatomical information and attenuation correction for the PET part, or it may offer full radiological diagnostic features. Regarding the radiotracers for gastrointectinal oncology, FDG remains the mainstay but alternative compounds aimed at more specific biological targets are actively tested. In particular Ga-68-labelled DOTA derivatives image somatostatine receptors with exquisite sensitivity and specificity. In clinical practice, several indications are well recognized for FDG PET-CT. These include the initial staging of esophageal, pancreatic and rectal cancers with a clinical impact in a significal proportion of patients. The metabolic activity, as recorded prior to any treatment, holds prognostic information in esophageal and rectal cancers, as well as GISTs. Methodological issues remain to be solved, but the potential is clearly present so that an increased clinical role is highly likely in the near future. FDG PET-CT is a major clinical tool in the detection and staging of recurrent colorectal cancer, and for determining the resectability of liver metastases. Ongoing developments include technological advances, in particular the combined PET-MR devices, and alternative tracers, such as those imaging angiogenesis. [less ▲]Detailed reference viewed: 80 (7 ULg)
Metabolic activity in external and internal awareness networks in severely brain-damaged patients.
Thibaut, Aurore ; Bruno, Marie-Aurélie ; Chatelle, Camille et al
in Journal of Rehabilitation Medicine (2012), 44(6), 487-94
OBJECTIVE: An extrinsic cerebral network (encompassing lateral frontoparietal cortices) related to external/sensory awareness and an intrinsic midline network related to internal/self-awareness have been ... [more ▼]
OBJECTIVE: An extrinsic cerebral network (encompassing lateral frontoparietal cortices) related to external/sensory awareness and an intrinsic midline network related to internal/self-awareness have been identified recently. This study measured brain metabolism in both networks in patients with severe brain damage. DESIGN: Prospective [18F]-fluorodeoxyglucose-positron emission tomography and Coma Recovery Scale-Revised assessments in a university hospital setting. SUBJECTS: Healthy volunteers and patients in vegetative state/unresponsive wakefulness syndrome (VS/UWS), minimally conscious state (MCS), emergence from MCS (EMCS), and locked-in syndrome (LIS). RESULTS: A total of 70 patients were included in the study: 24 VS/UWS, 28 MCS, 10 EMCS, 8 LIS and 39 age-matched controls. VS/UWS showed metabolic dysfunction in extrinsic and intrinsic networks and thalami. MCS showed dysfunction mostly in intrinsic network and thalami. EMCS showed impairment in posterior cingulate/retrosplenial cortices. LIS showed dysfunction only in infratentorial regions. Coma Recovery Scale-Revised total scores correlated with metabolic activity in both extrinsic and part of the intrinsic network and thalami. CONCLUSION: Progressive recovery of extrinsic and intrinsic awareness network activity was observed in severely brain-damaged patients, ranging from VS/UWS, MCS, EMCS to LIS. The predominance of intrinsic network impairment in MCS could reflect altered internal/self-awareness in these patients, which is difficult to quantify at the bedside. [less ▲]Detailed reference viewed: 318 (59 ULg)