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El Yaagoubi Y, Lioret E, Thomas C, Loret JE, Simonneau A, Michaud-Robert AV, Philippe L, Ogielska M, Prunier-Aesch C. Value of 18 F-FDG PET/CT to Identify Occult Infection in Presumed Aseptic Pseudarthrosis after Spinal Fusion: Correlation with Intraoperative Cultures. World J Nucl Med 2024; 23:17-24. [PMID: 38595836 PMCID: PMC11001461 DOI: 10.1055/s-0044-1778711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024] Open
Abstract
Objective Fluorine-18 fluorodeoxyglucose ( 18 F-FDG) positron emission tomography/computed tomography (PET/CT) has gained attention as an emerging tool in case of suspicion of infection on spine, whether native or instrumented. However, the diagnostic performance of 18 F-FDG PET/CT in clinically occult low-grade surgical site infection (SSI) after spinal fusion, an important risk factor for pseudarthrosis, remains unknown. Methods We retrospectively identified all the presumed aseptic patients with pseudarthrosis confirmed by revision surgery who underwent preoperative 18 F-FDG PET/CT scans performed between April 2019 and November 2022. These patients were presumed aseptic because they did not have clinical signs or laboratory tests suggestive of SSI, preoperatively. The PET/CT images were analyzed in consensus by two nuclear medicine physicians blinded to the clinical, biological, and imaging information. Visual assessment of increased uptake around cage/intervertebral disk space (and/or hardware) higher than background recorded from the first normal adjacent vertebra was interpreted as positive. Image data were also quantitatively analyzed by the maximum standardized uptake value as an index of 18 F-FDG uptake, and the ratio between the uptake around cage/intervertebral disk space (and/or hardware) and background recorded from the first normal adjacent vertebra was calculated. The final diagnosis of infection was based on intraoperative cultures obtained during pseudarthrosis revision surgery. Results Thirty-six presumed aseptic patients with surgically confirmed pseudarthrosis after spinal fusion underwent preoperative 18 F-FDG PET/CT scans. Cultures of samples from revisions found that 20 patients (56%) were infected. The most frequent isolated bacterium was Cutibacterium acnes ( C. acnes ) in 15 patients (75%), followed by coagulase-negative staphylococci (CNS) in 7 patients (33%). Two patients had co-infections involving both C. acnes and CNS. Of the 36 PET/CT studied in this study, 12 scans were true-negative, 10 true-positive, 10 false-negative, and 4 false-positive. This resulted in sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy of 50%, 75%, 71%, 55%, and 61%, respectively. Conclusion In presumed aseptic pseudarthrosis after spinal fusion, 18 F-FDG PET/CT offers good specificity (75%) but low sensitivity (50%) to identify occult SSI. The high prevalence (56%) of SSI, mostly caused by C. acnes (75%), found in our presumed aseptic cohort of patients supports the utility of systematic intraoperative cultures in revision cases for pseudarthrosis.
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Affiliation(s)
| | - Eric Lioret
- Department of Neurosurgery, Vinci Clinic, Tours, France
| | | | | | | | | | | | - Maja Ogielska
- Department of Infectious Diseases, Vinci Clinic, Tours, France
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Bertin M, Basalgète R, Ocaña AJ, Féraud G, Romanzin C, Philippe L, Michaut X, Fillion JH. Vacuum UV photodesorption of organics in the interstellar medium: an experimental study of formic acid HCOOH and methyl formate HCOOCH 3-containing ices. Faraday Discuss 2023; 245:488-507. [PMID: 37309601 DOI: 10.1039/d3fd00004d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Being a potential process that could explain gas phase abundances of so-called complex organic molecules (COMs) in the cold interstellar medium (ISM), the UV photon-induced desorption from organics-containing molecular ices has been experimentally studied. In this work, we focused on the observation of the photodesorbed products and the measurement of the associated photodesorption yields from pure and mixed molecular ices, each containing organic molecules whose detection has been achieved in the gas phase of the cold ISM, namely formic acid HCOOH and methyl formate HCOOCH3. Each molecule, in pure ice or in ice mixed with CO or water, was irradiated at 15 K with monochromatic vacuum UV photons in the 7-14 eV range using synchrotron radiation from the SOLEIL synchrotron facility, DESIRS beamline. Photodesorption yields of the intact molecules and of the photoproducts were derived as a function of the incident photon energy. Experiments have revealed that the desorbing species match the photodissociation pattern of each isolated molecule, with little influence of the kind of ice (pure or mixed in CO or H2O-rich environment). For both species, the photodesorption of the intact organics is found to be negligible in our experimental conditions, resulting in yields typically below 10-5 ejected molecules per incident photon. The results obtained on HCOOH and HCOOCH3-containing ices are similar to what has already been found for methanol-containing ices, but contrast with the case of another complex molecule, CH3CN, photodesorption of which has been recently studied. Such experimental results may be linked to the observation of COMs in protoplanetary disks, in which CH3CN is commonly observed whereas HCOOH or methanol are detected only in some sources, HCOOCH3 not being detected at all.
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Affiliation(s)
- Mathieu Bertin
- Sorbonne Université, Observatoire de Paris, PSL University, CNRS, LERMA, F-75005, Paris, France.
| | - Romain Basalgète
- Sorbonne Université, Observatoire de Paris, PSL University, CNRS, LERMA, F-75005, Paris, France.
| | - Antonio J Ocaña
- Sorbonne Université, Observatoire de Paris, PSL University, CNRS, LERMA, F-75005, Paris, France.
| | - Géraldine Féraud
- Sorbonne Université, Observatoire de Paris, PSL University, CNRS, LERMA, F-75005, Paris, France.
| | - Claire Romanzin
- Univ. Paris-Saclay, CNRS UMR 8000, ICP, F-91405, Orsay, France
| | - Laurent Philippe
- Sorbonne Université, Observatoire de Paris, PSL University, CNRS, LERMA, F-75005, Paris, France.
| | - Xavier Michaut
- Sorbonne Université, Observatoire de Paris, PSL University, CNRS, LERMA, F-75005, Paris, France.
| | - Jean-Hugues Fillion
- Sorbonne Université, Observatoire de Paris, PSL University, CNRS, LERMA, F-75005, Paris, France.
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El Yaagoubi Y, Loret J, Liore E, Bernard L, Thomas C, Simonneau A, Prunier Aesch C, Chetanneau A, Philippe L, Ogielska M. TEP/TDM au fluorure de sodium (18F-FNa) dans l’imagerie du rachis après arthrodèse. Médecine Nucléaire 2023. [DOI: 10.1016/j.mednuc.2023.01.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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El Yaagoubi Y, Loret JE, Lioret E, Thomas C, Simonneau A, Vinikoff L, Prunier-Aesch C, Chetanneau A, Philippe L, Ogielska M, Bernard L. 18F-NaF PET/CT in Presumed Aseptic Pseudarthrosis after Spinal Fusion: Correlation with Findings at Revision Surgery and Intraoperative Cultures. World J Nucl Med 2022; 21:302-313. [DOI: 10.1055/s-0042-1750400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Abstract
Abstract
Background Conventional imaging is useful to assess interbody fusion by showing complete trabecular bony bridging, but has a low positive predictive value for pseudarthrosis. Because alterations of bone metabolism may precede structural anatomical changes on computed tomography (CT), we aimed to investigate the ability of fluorine 18 sodium fluoride positron emission tomography/computed tomography (18F-NaF PET/CT) to identify pseudarthrosis after spinal fusion using surgical revision as the reference standard.
Methods We retrospectively reviewed 18F-NaF PET/CT scans performed between February 2019 and September 2020 in patients experiencing pain after spinal fusion. We included the 18 patients who underwent revision surgery for suspicion of pseudarthrosis. Five consecutive patients who were clearly fused on CT served as the control group.
Results In the revision surgery group (n=18), visual assessment by 18F-NaF PET/CT revealed that all 22 cages with an increased 18F-NaF uptake around intercorporal fusion material had mobility at revision surgery, whereas none of the fused patients (n=5) showed uptake around cage/intervertebral disk space. Among the 18 patients with presumed aseptic pseudarthrosis, intraoperative cultures revealed surgical site infection (SSI) caused by Cutibacterium acnes (C. acnes) in seven patients (38.9%). There was a statistically significant difference in standardized uptake values and uptake ratios between the revision surgery and control groups (p=5.3× 10−6 and p=0.0002, respectively).
Conclusions 18F-NaF PET/CT imaging appeared as a useful tool to identify pseudarthrosis following spinal fusion. The unexpectedly high prevalence (38.9%) of SSI caused by C. acnes found in presumed aseptic patients supports the utility of intraoperative cultures in revision cases for pseudarthrosis, even without preoperative clinical suspicion of SSI.
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Affiliation(s)
- Yacine El Yaagoubi
- Department of Nuclear Medicine, Vinci Clinic, Alexandre Minkowski, Chambray-lès-Tours, France
| | | | - Eric Lioret
- Department of Neurosurgery, Vinci Clinic, Alexandre Minkowski, Chambray-lès-Tours, France
| | - Clément Thomas
- Department of Neurosurgery, Vinci Clinic, Alexandre Minkowski, Chambray-lès-Tours, France
| | - Adrien Simonneau
- Department of Neurosurgery, NCT+ Clinic, Saint-Cyr-sur-Loire, France
| | - Laurent Vinikoff
- Department of Neurosurgery, NCT+ Clinic, Saint-Cyr-sur-Loire, France
| | - Caroline Prunier-Aesch
- Department of Nuclear Medicine, Vinci Clinic, Alexandre Minkowski, Chambray-lès-Tours, France
| | - Alain Chetanneau
- Department of Nuclear Medicine, Vinci Clinic, Alexandre Minkowski, Chambray-lès-Tours, France
| | - Laurent Philippe
- Department of Nuclear Medicine, Vinci Clinic, Alexandre Minkowski, Chambray-lès-Tours, France
| | - Maja Ogielska
- Department of Infectious Diseases, Vinci Clinic, Alexandre Minkowski, Chambray-lès-Tours, France
| | - Louis Bernard
- Department of Infectious Diseases, Bretonneau University Hospital, Tonnellé, Tours, France
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BASALGETE R, Torres-Díaz D, Lafosse A, Amiaud L, Féraud G, Jeseck P, Philippe L, Michaut X, Fillion JH, Bertin M. Indirect X-ray photodesorption of 15N 2 and 13CO from mixed and layered ices. J Chem Phys 2022; 157:084308. [DOI: 10.1063/5.0100014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
X-ray photodesorption yields of 15N2 and 13CO are derived as a function of the incident photon energy near the N (~ 400 eV) and O K-edge (~ 500 eV) for pure 15N2 ice and mixed 13CO:15N2 ices. The photodesorption spectra from the mixed ices reveal an indirect desorption mechanism for which the desorption of 15N2 and 13CO is triggered by the photo-absorption of respectively 13CO and 15N2. This mechanism is confirmed by the X-ray photodesorption of 13CO from a layered 13CO/15N2 ice irradiated at 401 eV, on the N 1s -> π* transition of 15N2. This latter experiment enables to quantify the relevant depth involved in the indirect desorption process, which is found to be 30 - 40 ML in that case. This value is further related to the energy transport of Auger electrons emitted from the photo-absorbing 15N2molecules that scatter towards the ice surface, inducing the desorption of 13CO. The photodesorption yields corrected from the energy that can participate to the desorption process (expressed in molecules desorbed by eV deposited) do not depend on the photon energy hence neither on the photo-absorbing molecule nor on its state after Auger decay. This demonstrates that X-ray induced electron stimulated desorption (XESD), mediated by Auger scattering, is the dominant process explaining the desorption of 15N2 and 13CO from the ices studied in this work.
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Affiliation(s)
| | | | - Anne Lafosse
- Chemistry Department, University Paris-Sud, France
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Thiry P, Houry M, Philippe L, Nocent O, Buisseret F, Dierick F, Slama R, Bertucci W, Thévenon A, Simoneau-Buessinger E. Machine Learning Identifies Chronic Low Back Pain Patients from an Instrumented Trunk Bending and Return Test. Sensors 2022; 22:s22135027. [PMID: 35808522 PMCID: PMC9269703 DOI: 10.3390/s22135027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 06/28/2022] [Accepted: 06/30/2022] [Indexed: 12/10/2022]
Abstract
Nowadays, the better assessment of low back pain (LBP) is an important challenge, as it is the leading musculoskeletal condition worldwide in terms of years of disability. The objective of this study was to evaluate the relevance of various machine learning (ML) algorithms and Sample Entropy (SampEn), which assesses the complexity of motion variability in identifying the condition of low back pain. Twenty chronic low-back pain (CLBP) patients and 20 healthy non-LBP participants performed 1-min repetitive bending (flexion) and return (extension) trunk movements. Analysis was performed using the time series recorded by three inertial sensors attached to the participants. It was found that SampEn was significantly lower in CLBP patients, indicating a loss of movement complexity due to LBP. Gaussian Naive Bayes ML proved to be the best of the various tested algorithms, achieving 79% accuracy in identifying CLBP patients. Angular velocity of flexion movement was the most discriminative feature in the ML analysis. This study demonstrated that: supervised ML and a complexity assessment of trunk movement variability are useful in the identification of CLBP condition, and that simple kinematic indicators are sensitive to this condition. Therefore, ML could be progressively adopted by clinicians in the assessment of CLBP patients.
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Affiliation(s)
- Paul Thiry
- LAMIH, CNRS, UMR 8201, Université Polytechnique Hauts-de-France, 59313 Valenciennes, France;
- CHU Lille, Université de Lille, 59000 Lille, France;
- CeREF Technique, Chaussée de Binche 159, 7000 Mons, Belgium; (F.B.); (F.D.)
- Correspondence:
| | - Martin Houry
- Centre de Recherche FoRS, Haute-Ecole de Namur-Liège-Luxembourg (Henallux), Rue Victor Libert 36H, 6900 Marche-en-Famenne, Belgium; (M.H.); (L.P.)
| | - Laurent Philippe
- Centre de Recherche FoRS, Haute-Ecole de Namur-Liège-Luxembourg (Henallux), Rue Victor Libert 36H, 6900 Marche-en-Famenne, Belgium; (M.H.); (L.P.)
| | - Olivier Nocent
- PSMS, Université de Reims Champagne Ardenne, 51867 Reims, France; (O.N.); (W.B.)
| | - Fabien Buisseret
- CeREF Technique, Chaussée de Binche 159, 7000 Mons, Belgium; (F.B.); (F.D.)
- Service de Physique Nucléaire et Subnucléaire, UMONS Research Institute for Complex Systems, Université de Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Frédéric Dierick
- CeREF Technique, Chaussée de Binche 159, 7000 Mons, Belgium; (F.B.); (F.D.)
- Centre National de Rééducation Fonctionnelle et de Réadaptation–Rehazenter, Laboratoire d’Analyse du Mouvement et de la Posture (LAMP), Rue André Vésale 1, 2674 Luxembourg, Luxembourg
- Faculté des Sciences de la Motricité, UCLouvain, Place Pierre de Coubertin 1, 1348 Ottignies-Louvain-la-Neuve, Belgium
| | - Rim Slama
- LINEACT Laboratory, CESI Lyon, 69100 Villeurbanne, France;
| | - William Bertucci
- PSMS, Université de Reims Champagne Ardenne, 51867 Reims, France; (O.N.); (W.B.)
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Putaud T, Wespiser C, Bertin M, Fillion JH, Kalugina YN, Jeseck P, Milpanis A, Philippe L, Soulard P, Tremblay B, Tuloup C, Ayotte P, Michaut X. Ro-translational dynamics of confined water: II - Spectroscopic evidence of confinement effects on the far-infrared spectra of water isotopologues in argon and krypton matrices. J Chem Phys 2022; 156:074305. [DOI: 10.1063/5.0079566] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Thomas Putaud
- Universite de Sherbrooke Departement de chimie, Canada
| | | | | | | | | | | | | | | | | | | | | | - Patrick Ayotte
- Département de Chimie, Universite de Sherbrooke Departement de chimie, Canada
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8
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Dupuy R, Bertin M, Féraud G, Romanzin C, Putaud T, Philippe L, Michaut X, Jeseck P, Cimino R, Baglin V, Fillion JH. X-Ray induced desorption and photochemistry in CO ice. Phys Chem Chem Phys 2021; 23:15965-15979. [PMID: 34308933 DOI: 10.1039/d1cp02670d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report an investigation of X-ray induced desorption of neutrals, cations and anions from CO ice. The desorption of neutral CO, by far the most abundant, is quantified and discussed within the context of its application to astrochemistry. The desorption of many different cations, including large cations up to the mass limit of the spectrometer, is observed. In contrast, the only desorbing anions detected are O- and C-. The desorption mechanisms of all these species are discussed with the aid of their photodesorption spectrum. The evolution of the X-ray absorption spectrum shows significant chemical modifications of the ice upon irradiation, which along with the desorption of large cations gives a new insight into X-ray induced photochemistry in CO ice.
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Affiliation(s)
- R Dupuy
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005, Paris, France.
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El Yaagoubi Y, Prunier-Aesch C, Chetanneau A, Philippe L, Bleuet F, Menard E, Doll G. 18F-FDG PET/CT Detection of a Popliteal Mycotic Aneurysm Complicating Staphylococcus aureus Bacteremia. Clin Nucl Med 2021; 46:411-412. [PMID: 33630810 DOI: 10.1097/rlu.0000000000003562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
ABSTRACT A 75-year-old man presented with Staphylococcus aureus bacteremia, fever, and right posterior knee pain. Venous Doppler ultrasound of the lower extremity showed an isolated right calf muscle vein thrombosis, without any sign of deep vein thrombosis. 18F-FDG PET/CT revealed an intense focal uptake on the right popliteal artery, suggesting a mycotic aneurysm (MA). Lower limb CT angiography confirmed an MA of the right popliteal artery. The patient underwent surgical procedure with excision of the MA, whose cultures grew methicillin-sensitive S. aureus. Our case highlights the importance of including lower limbs in 18F-FDG PET/CT acquisition in case of suspicion of septic emboli.
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Affiliation(s)
| | | | | | | | | | | | - Gérard Doll
- Cardiology, NCT+ Clinic, Saint-Cyr-Sur-Loire, France
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Dupuy R, Bertin M, Féraud G, Michaut X, Marie-Jeanne P, Jeseck P, Philippe L, Baglin V, Cimino R, Romanzin C, Fillion JH. Mechanism of Indirect Photon-Induced Desorption at the Water Ice Surface. Phys Rev Lett 2021; 126:156001. [PMID: 33929258 DOI: 10.1103/physrevlett.126.156001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Electronic excitations near the surface of water ice lead to the desorption of adsorbed molecules, through a so far debated mechanism. A systematic study of photon-induced indirect desorption, revealed by the spectral dependence of the desorption (7-13 eV), is conducted for Ar, Kr, N_{2}, and CO adsorbed on H_{2}O or D_{2}O amorphous ices. The mass and isotopic dependence and the increase of intrinsic desorption efficiency with photon energy all point to a mechanism of desorption induced by collisions between adsorbates and energetic H/D atoms, produced by photodissociation of water. This constitutes a direct and unambiguous experimental demonstration of the mechanism of indirect desorption of weakly adsorbed species on water ice, and sheds new light on the possibility of this mechanism in other systems. It also has implications for the description of photon-induced desorption in astrochemical models.
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Affiliation(s)
- R Dupuy
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - M Bertin
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - G Féraud
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - X Michaut
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - P Marie-Jeanne
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - P Jeseck
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - L Philippe
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - V Baglin
- CERN, CH-1211 Geneva 23, Switzerland
| | - R Cimino
- Laboratori Nazionali di Frascati (LNF)-INFN, I-00044 Frascati, Italy
| | - C Romanzin
- Laboratoire de Chimie Physique, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
| | - J-H Fillion
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
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Perez B, Lang C, Henriet J, Philippe L, Auber F. Risk prediction in surgery using case-based reasoning and agent-based modelization. Comput Biol Med 2020; 128:104040. [PMID: 33197734 DOI: 10.1016/j.compbiomed.2020.104040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/14/2020] [Accepted: 10/03/2020] [Indexed: 11/29/2022]
Abstract
Managing the risks arising from the actions and conditions of the various elements that make up an operating room is a major concern during a surgical procedure. One of the main challenges is to define alert thresholds in a non-deterministic context where unpredictable adverse events occur. In response to this problematic, this paper presents an architecture that couples a Multi-Agent System (MAS) with Case-Based Reasoning (CBR). The possibility of emulating a large number of situations thanks to MAS, combined with analytical data management thanks to CBR, is an original and efficient way of determining thresholds that are not defined a priori. We also compared different similarity calculation methods (Retrieve phase of CBR). The results presented in this article show that our model can manage alert thresholds in an environment that manages data as disparate as infectious agents, patient's vitals and human fatigue. In addition, they reveal that the thresholds proposed by the system are more efficient than the predefined ones. These results tend to prove that our simulator is an effective alert generator. Nevertheless, the context remains a simulation mode that we would like to enrich with real data from, for example, monitoring sensors (bracelet for human fatigue, monitoring, etc).
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Affiliation(s)
- Bruno Perez
- FEMTO-ST Institute, Univ. Bourgogne-Franche-Comt é, CNRS, DISC, 16 Route de Gray, 25030, Besan çon, France.
| | - Christophe Lang
- FEMTO-ST Institute, Univ. Bourgogne-Franche-Comt é, CNRS, DISC, 16 Route de Gray, 25030, Besan çon, France.
| | - Julien Henriet
- FEMTO-ST Institute, Univ. Bourgogne-Franche-Comt é, CNRS, DISC, 16 Route de Gray, 25030, Besan çon, France.
| | - Laurent Philippe
- FEMTO-ST Institute, Univ. Bourgogne-Franche-Comt é, CNRS, DISC, 16 Route de Gray, 25030, Besan çon, France.
| | - Frédéric Auber
- Service de Chirurgie Pédiatrique, CHU Besançon, F-25000, Besançon, France; Laboratoire de Nanomédecine, Imagerie, Thérapeutique EA 4662, Université Bourgogne Franche-Comté, F-25000, Besançon, France.
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Zerka F, Vaidyanathan A, Barakat S, Benjamin M, Ralph T.H. L, Sean W, Philippe L. PO-1744: Privacy preserving distributed liver tumor segmentation. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)01762-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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El Yaagoubi Y, Prunier-Aesch C, Philippe L, Laplaige P. Hot-clot artifact in the lung parenchyma on 18F-fluorodeoxyglucose positron emission tomography/computed tomography mimicking malignancy with a homolateral non-small cell lung cancer. World J Nucl Med 2020; 20:202-204. [PMID: 34321977 PMCID: PMC8286006 DOI: 10.4103/wjnm.wjnm_75_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/29/2020] [Accepted: 06/30/2020] [Indexed: 11/04/2022] Open
Abstract
18F-fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (CT) is an important tool widely used in the oncology to stage and restage various malignancies. Intense focal FDG uptake in the lung parenchyma associated with the absence of anatomical lesion detected on CT can be explained by a lung microembolism, known as hot-clot artifact. We report, to the best of our knowledge, the first case describing a single hot-clot artifact located in the same lung as a histologically proven non-small cell lung cancer.
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Affiliation(s)
- Yacine El Yaagoubi
- Department of Nuclear Medicine, NCT+ Clinic, Saint-Cyr-Sur- Loire, France
| | | | - Laurent Philippe
- Department of Nuclear Medicine, NCT+ Clinic, Saint-Cyr-Sur- Loire, France
| | - Philippe Laplaige
- Department of Oncology, Blois Polyclinic, La Chaussée- Saint-Victor, France
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Dupuy R, Féraud G, Bertin M, Romanzin C, Philippe L, Putaud T, Michaut X, Cimino R, Baglin V, Fillion JH. Desorption of neutrals, cations, and anions from core-excited amorphous solid water. J Chem Phys 2020; 152:054711. [PMID: 32035460 DOI: 10.1063/1.5133156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Core-excitation of water ice releases many different molecules and ions in the gas phase. Studying these desorbed species and the underlying desorption mechanisms can provide useful information on the effects of x-ray irradiation in ice. We report a detailed study of the x-ray induced desorption of a number of neutral, cationic, and anionic species from amorphous solid water. We discuss the desorption mechanisms and the relative contributions of Auger and secondary electrons (x-ray induced electron stimulated desorption) and initial excitation (direct desorption) as well as the role of photochemistry. Anions are shown to desorb not just through processes linked with secondary electrons but also through direct dissociation of the core-excited molecule. The desorption spectra of oxygen ions (O+, OH+, H2O+, O-, and OH-) give a new perspective on their previously reported very low desorption yields for most types of irradiations of water, showing that they mostly originate from the dissociation of photoproducts such as H2O2.
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Affiliation(s)
- R Dupuy
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - G Féraud
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - M Bertin
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - C Romanzin
- Laboratoire de Chimie Physique, CNRS, univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
| | - L Philippe
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - T Putaud
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - X Michaut
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - R Cimino
- Laboratori Nazionali di Frascati (LNF)-INFN, I-00044 Frascati, Italy
| | - V Baglin
- CERN, CH-1211 Geneva 23, Switzerland
| | - J-H Fillion
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
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Turgeon PA, Vermette J, Alexandrowicz G, Peperstraete Y, Philippe L, Bertin M, Fillion JH, Michaut X, Ayotte P. Confinement Effects on the Nuclear Spin Isomer Conversion of H 2O. J Phys Chem A 2017; 121:1571-1576. [PMID: 28157310 DOI: 10.1021/acs.jpca.7b00893] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanism for interconversion between the nuclear spin isomers (NSI) of H2O remains shrouded in uncertainties. The temperature dependence displayed by NSI interconversion rates for H2O isolated in an argon matrix provides evidence that confinement effects are responsible for the dramatic increase in their kinetics with respect to the gas phase, providing new pathways for o-H2O↔p-H2O conversion in endohedral compounds. This reveals intramolecular aspects of the interconversion mechanism which may improve methodologies for the separation and storage of NSI en route to applications ranging from magnetic resonance spectroscopy and imaging to interpretations of spin temperatures in the interstellar medium.
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Affiliation(s)
| | - Jonathan Vermette
- Département de Chimie, Université de Sherbrooke , Sherbrooke J1K 2R1, Canada
| | - Gil Alexandrowicz
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology , Technion City, Haifa 32000, Israel
| | - Yoann Peperstraete
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Université Paris 06 , F-75252 Paris, France
| | - Laurent Philippe
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Université Paris 06 , F-75252 Paris, France
| | - Mathieu Bertin
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Université Paris 06 , F-75252 Paris, France
| | - Jean-Hugues Fillion
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Université Paris 06 , F-75252 Paris, France
| | - Xavier Michaut
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Université Paris 06 , F-75252 Paris, France
| | - Patrick Ayotte
- Département de Chimie, Université de Sherbrooke , Sherbrooke J1K 2R1, Canada
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Philippe L, Helias P, Puyraveau M, Boulahdour H, Deconinck E, Daguindau E. Long-term follow-up of (90)Y-ibritumomab-tiuxetan ((90)YIT) in the conditioning of autologous hematopoietic transplantation for indolent and mantle cell lymphomas in a single French center. Bone Marrow Transplant 2016; 51:1140-2. [PMID: 27042844 DOI: 10.1038/bmt.2016.67] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- L Philippe
- Department of Hematology, University Hospital, UMR 1098, Besançon, France
| | - P Helias
- Department of Oncology, University Hospital, Pointe-a-Pitre, Guadeloupe, France
| | - M Puyraveau
- Department of Clinical methodologies, University Hospital, Besançon, France
| | - H Boulahdour
- Department of Nuclear Medicine, University Hospital, Besançon, France
| | - E Deconinck
- Department of Hematology, University Hospital, UMR 1098, Besançon, France
| | - E Daguindau
- Department of Hematology, University Hospital, UMR 1098, Besançon, France
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Doronin M, Bertin M, Michaut X, Philippe L, Fillion JH. Adsorption energies and prefactor determination for CH3OH adsorption on graphite. J Chem Phys 2015; 143:084703. [DOI: 10.1063/1.4929376] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- M. Doronin
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, F-75252 Paris, France
| | - M. Bertin
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, F-75252 Paris, France
| | - X. Michaut
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, F-75252 Paris, France
| | - L. Philippe
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, F-75252 Paris, France
| | - J.-H. Fillion
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, F-75252 Paris, France
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Guyeux C, Nicod JM, Philippe L, Bahi JM. The study of unfoldable self-avoiding walks — Application to protein structure prediction software. J Bioinform Comput Biol 2015; 13:1550009. [DOI: 10.1142/s0219720015500092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Self-avoiding walks (SAWs) are the source of very difficult problems in probability and enumerative combinatorics. They are of great interest as, for example, they are the basis of protein structure prediction (PSP) in bioinformatics. The authors of this paper have previously shown that, depending on the prediction algorithm, the sets of obtained walk conformations differ: For example, all the SAWs can be generated using stretching-based algorithms whereas only the unfoldable SAWs can be obtained with methods that iteratively fold the straight line. A deeper study of (non-)unfoldable SAWs is presented in this paper. The contribution is first a survey of what is currently known about these sets. In particular, we provide clear definitions of various subsets of SAWs related to pivot moves (unfoldable and non-unfoldable SAWs, etc.) and the first results that we have obtained, theoretically or computationally, on these sets. Then a new theorem on the number of non-unfoldable SAWs is demonstrated. Finally, a list of open questions is provided and the consequences on the PSP problem is proposed.
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Affiliation(s)
- Christophe Guyeux
- FEMTO-ST Institute, Université de Franche-Comté/CNRS/ENSMM/UTBM, Besançon, France
| | - Jean-Marc Nicod
- FEMTO-ST Institute, Université de Franche-Comté/CNRS/ENSMM/UTBM, Besançon, France
| | - Laurent Philippe
- FEMTO-ST Institute, Université de Franche-Comté/CNRS/ENSMM/UTBM, Besançon, France
| | - Jacques M. Bahi
- FEMTO-ST Institute, Université de Franche-Comté/CNRS/ENSMM/UTBM, Besançon, France
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Philippe L, Casset-Senon D, Lorette G, Diot P, Cosnay P. Sarcoïdose cardiaque active : diagnostic et suivi par la TEP/TDM au FDG. Presse Med 2015; 44:690-2. [DOI: 10.1016/j.lpm.2014.09.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 05/20/2014] [Accepted: 09/22/2014] [Indexed: 10/24/2022] Open
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Philippe L, Voicu M, Katringer E, Moldovan M, Deconinck E, Duchene F. Pseudo-microangiopathie : diagnostic à ne pas manquer ! Rev Med Interne 2014. [DOI: 10.1016/j.revmed.2014.10.329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Vichery C, Le Nader V, Frantz C, Zhang Y, Michler J, Philippe L. Stabilization mechanism of electrodeposited silicon thin films. Phys Chem Chem Phys 2014; 16:22222-8. [PMID: 25212513 DOI: 10.1039/c4cp02797c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- C Vichery
- EMPA, Swiss Fed Labs Mat Sci & Technol, Laboratory for Mechanics of Materials & Nanostructures, CH-3602 Thun, Switzerland.
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Fillion JH, Fayolle EC, Michaut X, Doronin M, Philippe L, Rakovsky J, Romanzin C, Champion N, Öberg KI, Linnartz H, Bertin M. Wavelength resolved UV photodesorption and photochemistry of CO2ice. Faraday Discuss 2014; 168:533-52. [DOI: 10.1039/c3fd00129f] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bahi JM, Guyeux C, Mazouzi K, Philippe L. Computational investigations of folded self-avoiding walks related to protein folding. Comput Biol Chem 2013; 47:246-56. [DOI: 10.1016/j.compbiolchem.2013.10.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Accepted: 10/01/2013] [Indexed: 11/25/2022]
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Elias J, Utke I, Yoon S, Bechelany M, Weidenkaff A, Michler J, Philippe L. Electrochemical growth of ZnO nanowires on atomic layer deposition coated polystyrene sphere templates. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.04.168] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Crabol Y, Terrier B, Rozenberg F, Pestre V, Legendre C, Hermine O, Montagnier-Petrissans C, Guillevin L, Mouthon L, Loic G, Annette B, Alain F, Bertrand F, Bertrand G, Amelie L, Isabelle L, Catherine MP, Luc M, Eric O, Nathalie P, Helene S, Tarek S, Hopital Ambroise P, Jean-Marie LP, Bruno F, Bernard C, Thomas P, Francois D, Loic G, Zora M, Olivier H, Christophe L, Philippe L, Olivier L, Jean-Charles P, Norbert-Claude G, Jean-Paul F, Eric O, Guy L, Hopital B, Hopital N, Amina B. Intravenous Immunoglobulin Therapy for Pure Red Cell Aplasia Related to Human Parvovirus B19 Infection: A Retrospective Study of 10 Patients and Review of the Literature. Clin Infect Dis 2012; 56:968-77. [DOI: 10.1093/cid/cis1046] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Yi Chun DX, Alexandre H, Edith B, Nacera O, Julie P, Chantal J, Eric R, Zhang X, Jin Y, Miravete M, Dissard R, Klein J, Gonzalez J, Caubet C, Pecher C, Pipy B, Bascands JL, Mercier-Bonin M, Schanstra J, Buffin-Meyer B, Claire R, Rigothier C, Richard D, Sebastien L, Moin S, Chantal B, Christian C, Jean R, Migliori M, Migliori M, Cantaluppi V, Mannari C, Medica D, Giovannini L, Panichi V, Goldwich A, Alexander S, Andre G, Amann K, Migliorini A, Sagrinati C, Angelotti ML, Mulay SR, Ronconi E, Peired A, Romagnani P, Anders HJ, Chiang WC, Lai CF, Peng WH, Wu CF, Chang FC, Chen YT, Lin SL, Chen YM, Wu KD, Lu KS, Tsai TJ, Virgine O, Qing Feng F, Zhang SY, Dominique D, Vincent A, Marina C, Philippe L, Georges G, Pawlak A, Sahali D, Matsumoto S, Kiyomoto H, Ichimura A, Dan T, Nakamichi T, Tsujita T, Akahori K, Ito S, Miyata T, Xie S, Zhang B, Shi W, Yang Y, Nagasu H, Satoh M, Kidokoro K, Nishi Y, Ihoriya C, Kadoya H, Sasaki T, Kashihara N, Wu CF, Chang FC, Chen YT, Chou YH, Duffield J, Lin SL, Rocca C, Rocca C, Gregorini M, Corradetti V, Valsania T, Bedino G, Bosio F, Pattonieri EF, Esposito P, Sepe V, Libetta C, Rampino T, Dal Canton A, Bedino G, Gregorini M, Corradetti V, Rocca C, Pattonieri EF, Valsania T, Bosio F, Esposito P, Sepe V, Libetta C, Rampino T, Dal Canton A, Omori H, Kawada N, Inoue K, Ueda Y, Yamamoto R, Matsui I, Kaimori J, Takabatake Y, Moriyama T, Isaka Y, Rakugi H, Wasilewska A, Taranta-Janusz K, Deebek W, Kuroczycka-Saniutycz E, Lee AS, Lee AS, Lee JE, Jung YJ, Kang KP, Lee S, Kim W, Arfian N, Emoto N, Yagi K, Nakayama K, Hartopo AB, Nugrahaningsih DA, Yanagisawa M, Hirata KI, Munoz-Felix JM, Lopez-Novoa JM, Martinez-Salgado C, Oujo B, Munoz-Felix JM, Arevalo M, Bernabeu C, Perez-Barriocanal F, Lopez-Novoa JM, Jesper K, Nathalie V, Pierre G, Yi Chun DX, Alexandre H, Eric R, Iyoda M, Shibata T, Matsumoto K, Shindo-Hirai Y, Kuno Y, Wada Y, Akizawa T, Schwartz I, Schwartz D, Prot Bertoye C, Prot Bertoye C, Terryn S, Claver J, Beghdadi WB, Monteiro R, Blank U, Devuyst O, Daugas E, Van Beneden K, Geers C, Pauwels M, Mannaerts I, Van den Branden C, Van Grunsven LA, Seckin I, Pekpak M, Uzunalan M, Uruluer B, Kokturk S, Ozturk Z, Sonmez H, Yaprak E, Furuno Y, Tsutsui M, Morishita T, Shimokawa H, Otsuji Y, Yanagihara N, Kabashima N, Ryota S, Kanegae K, Miyamoto T, Nakamata J, Ishimatsu N, Tamura M, Nakagawa T, Nakagawa T, Ichikawa K, Miyamoto M, Takabayashi D, Yamazaki H, Kakeshita K, Koike T, Kagitani S, Tomoda F, Hamashima T, Ishii Y, Inoue H, Sasahara M, El Machhour F, Kerroch M, Mesnard L, Chatziantoniou C, Dussaule JC, Inui K, Sasai F, Maruta Y, Nishiwaki H, Kawashima E, Inoue Y, Yoshimura A, Matsumoto K, Matsumoto K, Iyoda M, Shibata T, Wada Y, Shindo-Hirai Y, Kuno Y, Akizawa T, Musacchio E, Priante G, Valvason C, Sartori L, Baggio B, Kim JH, Gross O, Diana R, Gry DH, Asimal B, Johanna T, Imke SE, Lydia W, Gerhard-Anton M, Hassan D, Cano JL, Griera M, Olmos G, Martin P, Cortes MA, Lopez-Ongil S, Rodriguez-Puyol D, DE Frutos S, Gonzalez M, DE Frutos S, Cano JL, Luengo A, Martin P, Rodriguez-Puyol M, Calleros L, Lupica R, Lacquaniti A, Donato V, Maggio R, Mastroeni C, Lucisano S, Cernaro V, Fazio MR, Quartarone A, Buemi M, Kacik M, Goedicke S, Eggert H, Hoyer JD, Wurm S, Wurm S, Steege A, Banas M, Kurtz A, Banas B, Lasagni L, Lazzeri E, Peired A, Angelotti ML, Ronconi E, Romoli S, Romagnani P, Schaefer I, Teng B, Worthmann K, Haller H, Schiffer M, Prattichizzo C, Netti GS, Rocchetti MT, Cormio L, Carrieri G, Stallone G, Grandaliano G, Ranieri E, Gesualdo L, Kucher A, Smirnov A, Parastayeva M, Beresneva O, Kayukov I, Zubina I, Ivanova G, Abed A, Schlekenbach L, Foglia B, Chatziantoniou C, Kwak B, Chadjichristos C, Queisser N, Schupp N, Brand S, Himer L, Himer L, Szebeni B, Sziksz E, Saijo S, Kis E, Prokai A, Banki NF, Fekete A, Tulassay T, Vannay A, Hegner B, Schaub T, Lange C, Dragun D, Klinkhammer BM, Rafael K, Monika M, Anna M, Van Roeyen C, Boor P, Eva Bettina B, Simon O, Esther S, Floege J, Kunter U, Hegner B, Janke D, Schaub T, Lange C, Jankowski J, Dragun D, Hayashi M, Takamatsu I, Horimai C, Yoshida T, Seno DI Marco G, Koenig M, Stock C, Reiermann S, Amler S, Koehler G, Fobker M, Buck F, Pavenstaedt H, Lang D, Brand M, Plotnikov E, Morosanova M, Pevzner I, Zorova L, Pulkova N, Zorov D, Wornle M, Ribeiro A, Belling F, Merkle M, Nakazawa D, Nishio S, Shibasaki S, Tomaru U, Akihiro I, Kobayashi I, Imanishi Y, Kurajoh M, Nagata Y, Yamagata M, Emoto M, Michigami T, Ishimura E, Inaba M, Nishi Y, Satoh M, Sasaki T, Kashihara N, Wu CC, Lu KC, Chen JS, Chu P, Lin YF, Eller K, Schroll A, Banas M, Kirsch A, Huber J, Weiss G, Theurl I, Rosenkranz AR, Zawada A, Rogacev K, Achenbach M, Fliser D, Held G, Heine GH, Miyamoto Y, Iwao Y, Watanabe H, Kadowaki D, Ishima Y, Chuang VTG, Sato K, Otagiri M, Maruyama T, Ueda Y, Iwatani H, Isaka Y, Watanabe H, Honda D, Miyamoto Y, Noguchi T, Kadowaki D, Ishima Y, Tanaka M, Tanaka H, Fukagawa M, Otagiri M, Maruyama T, Wornle M, Ribeiro A, Pircher J, Koppel S, Mannell H, Krotz F, Merkle M, Virzi GM, Bolin C, Cruz D, Scalzotto E, De Cal M, Vescovo G, Ronco C, Virzi GM, Bolin C, Cruz D, Scalzotto E, De Cal M, Vescovo G, Ronco C, Grobmayr R, Lech M, Ryu M, Anders HJ, Aoshima Y, Mizobuchi M, Ogata H, Kumata C, Nakazawa A, Kondo F, Ono N, Koiwa F, Kinugasa E, Akizawa T, Freisinger W, Lale N, Lampert A, Ditting T, Heinlein S, Schmieder RE, Veelken R, Nave H, Perthel R, Suntharalingam M, Bode-Boger S, Beutel G, Kielstein J, Rodrigues-Diez R, Rodrigues-Diez R, Rayego-Mateos S, Lavoz C, Stark Aroeira LG, Orejudo M, Alique M, Ortiz A, Egido J, Ruiz-Ortega M, Oskar W, Rusan C, Schaub T, Hegner B, Dragun D, Padberg JS, Wiesinger A, Brand M, Seno DI Marco G, Reuter S, Grabner A, Kentrup D, Lukasz A, Oberleithner H, Pavenstadt H, Kumpers P, Eberhardt HU, Skerka C, Chen Q, Hallstroem T, Hartmann A, Kemper MJ, Zipfel PF, N'gome-Sendeyo K, Fan QF, Zhang SY, Pawlak A, Sahali D, Wornle M, Ribeiro A, Merkle M, Toblli J, Toblli J, Cao G, Giani JF, Dominici FP, Kim JS, Yang JW, Kim MK, Han BG, Choi SO. Experimental pathology. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bertin M, Fayolle EC, Romanzin C, Öberg KI, Michaut X, Moudens A, Philippe L, Jeseck P, Linnartz H, Fillion JH. UV photodesorption of interstellar CO ice analogues: from subsurface excitation to surface desorption. Phys Chem Chem Phys 2012; 14:9929-35. [DOI: 10.1039/c2cp41177f] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Guérin VM, Elias J, Nguyen T, Philippe L, Pauporté T. Ordered networks of ZnO-nanowire hierarchical urchin-like structures for improved dye-sensitized solar cells. Phys Chem Chem Phys 2012; 14:12948-55. [DOI: 10.1039/c2cp42085f] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Philippe L, Mérino B, Blaire T, Bailliez A, Casset-Senon D, Levy M, Halley A, Divry G. Tetrofosmin early time gated post-stress single-photon emission computed tomography imaging: feasibility and potential benefits. J Nucl Cardiol 2011; 18:62-72. [PMID: 21063927 PMCID: PMC3032180 DOI: 10.1007/s12350-010-9302-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Accepted: 09/19/2010] [Indexed: 11/29/2022]
Abstract
BACKGROUND The purpose of this study is to evaluate the feasibility, the image quality, and the clinical relevance of an early gated post-stress (GPS) single-photon emission computed tomography (SPECT) tetrofosmin (Myoview™-GE Healthcare) acquisition protocol. Time delay between myocardial technetium-labeled tracer administration and SPECT acquisition is usually about 30 minutes after stress, and 45 to 60 minutes at rest: because of the absence of significant redistribution, perfusion images are related to stress even 30 minutes after stress injection, while function and thickening data obtained with gated acquisition 30 minutes after stress are mainly related to rest conditions. METHODS 194 patients were prospectively included and analyzed, in a multicenter registry. Three gated-SPECT 99(m)Tc-Tetrofosmin studies were performed per patient: GPS-SPECT, 30 minutes post-stress (GS30), and at rest (GR30). RESULTS GPS image quality was excellent/good (93.9%), and similar to GS30 images (96.6%). The presence of adjacent myocardial sub-diaphragmatic activity on GPS images was similar to GS30 images (24% vs 22%), and less frequent than on GR30 images (31%). For perfusion, thickening, and motion scores, there was no significant difference between early and 30 minute post-stress in the global patient population, but significant differences were observed between GPS and GS30 for LVEF (65% ± 15% vs 63% ± 14%). In the ischemic patients, with the stress-rest protocol, the perfusion score was 14.2 on GPS images and 12.4 on GS30 images (P = .002). CONCLUSIONS Tetrofosmin early GPS-SPECT is feasible without impairment of image quality (better count rate). Ischemic defect size on early post-stress images is slightly more pronounced than at 30 minutes: this could modify therapeutic decision. This technique produces reliable function information during early post-stress period, and might be useful for disclosing transient motion abnormalities.
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Mook WM, Niederberger C, Bechelany M, Philippe L, Michler J. Compression of freestanding gold nanostructures: from stochastic yield to predictable flow. Nanotechnology 2010; 21:055701. [PMID: 20023305 DOI: 10.1088/0957-4484/21/5/055701] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Characterizing the mechanical response of isolated nanostructures is vitally important to fields such as microelectromechanical systems (MEMS) where the behaviour of nanoscale contacts can in large part determine system reliability and lifetime. To address this challenge directly, single crystal gold nanodots are compressed inside a high resolution scanning electron microscope (SEM) using a nanoindenter equipped with a flat punch tip. These structures load elastically, and then yield in a stochastic manner, at loads ranging from 16 to 110 microN, which is up to five times higher than the load necessary for flow after yield. Yielding is immediately followed by displacement bursts equivalent to 1-50% of the initial height, depending on the yield point. During the largest displacement bursts, strain energy within the structure is released while new surface area is created in the form of localized slip bands, which are evident in both the SEM movies and still-images. A first order estimate of the apparent energy release rate, in terms of fracture mechanics concepts, for bursts representing 5-50% of the structure's initial height is on the order of 10-100 J m(-2), which is approximately two orders of magnitude lower than bulk values. Once this initial strain burst during yielding has occurred, the structures flow in a ductile way. The implications of this behaviour, which is analogous to a brittle to ductile transition, are discussed with respect to mechanical reliability at the micro- and nanoscales.
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Affiliation(s)
- W M Mook
- Laboratory for Mechanics of Materials and Nanostructures, Empa, Swiss Federal Laboratories for Materials Testing and Research, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland.
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Bechelany M, Brodard P, Philippe L, Michler J. Extended domains of organized nanorings of silver grains as surface-enhanced Raman scattering sensors for molecular detection. Nanotechnology 2009; 20:455302. [PMID: 19834249 DOI: 10.1088/0957-4484/20/45/455302] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The possibility to synthesize large areas of silver grains organized in nanorings using a simple technique based on nanosphere lithography and electroless plating as a metal deposition method is described for the first time. In addition, we present a systematic SERS study of the obtained long-range ordered silver nanodots and nanorings. The possibility to precisely control the size, the interdistance and the morphology of these nanostructures allows us to systematically investigate the influence of these parameters on SERS. We show that the best possible SERS substrates should not only present optimal sizes, interdistances and shapes, but also a grain-like structure composed of sub-100 nm grains in order to maximize the number of hot-spots. In addition, we show that grains arranged in nanorings present higher enhancement factors (E(F) = 5.5 x 10(5)) as compared to similar arrays made of nanodots. A wide range of applications, including real-time monitoring of catalytic surface reactions, environmental and security monitoring as well as clinical and pharmaceutical screening, can be envisaged for these SERS substrates.
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Affiliation(s)
- M Bechelany
- Laboratory for Mechanics of Materials and Nanostructures, EMPA, Swiss Federal Laboratories for Materials Testing and Research, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland.
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Sakamoto S, Philippe L, Bechelany M, Michler J, Asoh H, Ono S. Ordered hexagonal array of Au nanodots on Si substrate based on colloidal crystal templating. Nanotechnology 2008; 19:405304. [PMID: 21832614 DOI: 10.1088/0957-4484/19/40/405304] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We report two types of site-selective metal deposition methods based on colloidal crystal templating. We discuss in particular the controllability of the morphology and crystallinity of Au nanodots depending of the choice of method.
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Affiliation(s)
- S Sakamoto
- Department of Applied Chemistry, Faculty of Engineering, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo 192-0015, Japan
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Affiliation(s)
- L Philippe
- EMPA (Swiss Federal Laboratories for Materials Testing and Research) Feuerwerkerstrasse 39, 3602 Thun, Switzerland.
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Casset-Senon D, Philippe L, Renard JP, Cosnay P. Recurrent ventricular tachycardia in cardiac sarcoidosis: usefulness of fluorodeoxyglucose positron emission tomography for adequate management of corticoid therapy after placement of an implantable cardioverter defibrillator. J Nucl Cardiol 2008; 15:282-5. [PMID: 18371601 DOI: 10.1016/j.nuclcard.2008.01.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Danielle Casset-Senon
- Nuclear Medicine Department, Centre hospital-universitaire Trousseau, Tours, France.
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Bisson R, Philippe L, Châtelet M, Kratzer P. Comment on “Angular distributions of H-induced HD and D2 desorptions from the Si(100) surfaces” [J. Chem. Phys. 124, 054715 (2006)]. J Chem Phys 2008; 128:017101; author reply 017102. [DOI: 10.1063/1.2779032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yang S, Philippe L, Châtelet M. Formation and Characterization of Large (Ar) n , (N2) n , and Mixed (Ar) n (N2) m van der Waals Clusters Produced by Supersonic Expansion. J CLUST SCI 2007. [DOI: 10.1007/s10876-007-0136-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bisson R, Yang S, Philippe L, Châtelet M. Non-activated pathway in angle-resolved study of H2 molecules produced in the abstraction reaction of incident H atoms on hydrogenated Si(100). Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.06.072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Gouze-Decaris E, Philippe L, Minn A, Haouzi P, Gillet P, Netter P, Terlain B. Neurophysiological basis for neurogenic-mediated articular cartilage anabolism alteration. Am J Physiol Regul Integr Comp Physiol 2001; 280:R115-22. [PMID: 11124141 DOI: 10.1152/ajpregu.2001.280.1.r115] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study was designed to investigate the pathways involved in neurogenic-mediated articular cartilage damage triggered by a nonsystemic distant subcutaneous or intra-articular inflammation. The cartilage damage was assessed 24 h after subcutaneous or intra-articular complete Freund's adjuvant (CFA) injection measuring patellar proteoglycan (PG) synthesis (ex vivo [Na(2)(35)SO(4)] incorporation) in 96 Wistar rats. Unilateral subcutaneous or intra-articular injection of CFA induced significant decrease (25-29%) in PG synthesis in both patellae. Chronic administration of capsaicin (50 mg. kg(-1). day(-1) during 4 days), which blunted the normal response of C fiber stimulation, prevented the bilateral significant decrease in cartilage synthesis. Similarly, intrathecal injection of MK-801 (10 nmol/day during 5 days), which blocked the glutamatergic synaptic transmission at the dorsal horn of signal originating in primary afferent C fibers, eliminated the CFA-induced PG synthesis decrease in both patellae. Chemical sympathectomy, induced by guanethidine (12.5 mg. kg(-1). day(-1) during 6 wk), also prevented PG synthesis alteration. Finally, compression of the spinal cord at the T3-T5 level had a similar protective effect on the reduction of [Na(2)(35)SO(4)] incorporation. It is concluded that the signal that triggers articular cartilage synthesis damage induced by a distant local inflammation 1) is transmitted through the afferent C fibers, 2) makes glutamatergic synaptic connections with the preganglionic neurons of the sympathetic system, and 3) involves spinal and supraspinal pathways.
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Affiliation(s)
- E Gouze-Decaris
- Laboratoire de Physiopathologie et Pharmacologie Articulaires, Unite Mixte Recherche 7561 Centre National de la Recherche Scientifique-Université Henri Poincaré-Nancy I, France
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Philippe L, Lemonnier E, Jouquan J, Lazartigues A. P02.349 What are the skills required for general practice and paediatrics as FAS as the psychopathology of children and adolescents is concerned? Eur Psychiatry 2000. [DOI: 10.1016/s0924-9338(00)94756-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Casset-Senon D, Babuty D, Philippe L, Fauchier L, Eder V, Fauchier JP, Pottier JM, Delhomme C, Cosnay P. Fourier phase analysis of SPECT equilibrium radionuclide angiography in symptomatic patients with mitral valve prolapse without significant mitral regurgitation: assessment of biventricular functional abnormalities suggesting a cardiomyopathy. J Nucl Cardiol 2000; 7:471-7. [PMID: 11083196 DOI: 10.1067/mnc.2000.107242] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Ventricular premature beats are common in patients with mitral valve prolapse (MVP). The purpose of this study was to determine whether symptomatic patients with MVP had certain functional characteristics and if ventricular arrhythmia (VA) could be explained by functional extravalvular abnormalities. Single photon emission computed tomography equilibrium radionuclide angiography with Fourier phase analysis was preferred to the planar radionuclide method. Only patients without significant mitral regurgitation were studied. METHODS AND RESULTS A total of 23 symptomatic patients with MVP (13 men, 10 women, mean age, 47+/-14 years) without mitral regurgitation underwent single photon emission computed tomography equilibrium radionuclide angiography. Symptoms were present in 20 patients, and VA was present in 14 patients. Ejection fraction, regional wall motion, and Fourier phase analysis were examined in both ventricles and compared with results for normal subjects. Ventricular abnormalities were observed in 20 (87%) patients: decreased left ventricular and right ventricular ejection fractions, increased standard deviations of the mean phase and focal wall motion, and/or delayed phase abnormalities. Abnormalities were less frequent but more marked in the right ventricular free wall, the infundibulum, or the septum compared with left ventricular delayed abnormalities, which were more frequent but limited. In 12 of 14 patients with VA, phase-delayed areas were observed in the ventricle where the origin of ventricular premature beats was suspected on the basis of their electrocardiographic morphologic features. A relation was found between late potentials and delayed-phase areas (right ventricle or septum) and left bundle branch block morphologic features of VA. CONCLUSIONS Symptomatic patients with MVP frequently have ventricular dysfunction in 1 or both ventricles, sometimes limited but more marked in the presence of severe VA even without significant mitral regurgitation, suggesting structural modification. The use of a sensitive, accurate, and 3-dimensional method such as single photon emission computed tomography equilibrium radionuclide angiography may be of interest for a noninvasive investigation, especially in young symptomatic patients with MVP and VA.
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Affiliation(s)
- D Casset-Senon
- Nuclear Medicine Department, Trousseau Hospital, Tours, France.
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Casset-Senon D, Babuty D, Alison D, Philippe L, Eder V, Fauchier L, Cosnay P. Delayed contraction area responsible for sustained ventricular tachycardia in an arrhythmogenic right ventricular cardiomyopathy: demonstration by Fourier analysis of SPECT equilibrium radionuclide angiography. J Nucl Cardiol 2000; 7:539-42. [PMID: 11083203 DOI: 10.1067/mnc.2000.108730] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- D Casset-Senon
- Nuclear Medicine Department, Centre Hospitalier Universitaire, Trousseau, Tours, France.
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Philippe L, Rene C, Guillot J, Berthalemy M, Polack B, Laine V, Lacube P, Chermette R, Roux P. Impaction versus filtration for the detection of Pneumocystis carinii DNA in air. J Eukaryot Microbiol 1999; 46:94S. [PMID: 10519264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Affiliation(s)
- L Philippe
- UMR INRA-AFSSA-ENVA Immunologie et Biologie Moléculaire Parasitaires et Fongiques, Ecole Nationale Vétérinaire d' Alfort, Maisons Alfort, France.
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Decaris E, Guingamp C, Chat M, Philippe L, Grillasca JP, Abid A, Minn A, Gillet P, Netter P, Terlain B. Evidence for neurogenic transmission inducing degenerative cartilage damage distant from local inflammation. Arthritis Rheum 1999; 42:1951-60. [PMID: 10513812 DOI: 10.1002/1529-0131(199909)42:9<1951::aid-anr22>3.0.co;2-d] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE To investigate involvement of the nervous system in ipsilateral and contralateral joint inflammation. METHODS Freund's complete adjuvant (CFA; 1 mg or 1 microg) was injected unilaterally and the messages (a) from the hind paw to the ipsilateral and contralateral knees and (b) from one knee to the contralateral knee were analyzed. The degenerative impact of the local injury on distant cartilage was assessed using patellar proteoglycan synthesis as an indicator. Neurogenic mechanisms were blocked either by spinal cord compression or by injection of neurokinin 1 (NK-1) antagonist, or they were mimicked by intraarticular injection of substance P. The data were compared with those gathered in a model of systemic inflammation, characterized by fever and serum interleukin-6 production. RESULTS After unilateral subcutaneous injection of CFA, proteoglycan anabolism decreased bilaterally. Spinal cord compression and administration of the NK-1 antagonist inhibited the response in the contralateral limb. Following 1 mg CFA subcutaneous injection, the ipsilateral response implicated both neurogenic and systemic mechanisms, whereas the nervous system alone was implicated after 1 microg subcutaneous CFA injection. The 1 microg CFA intraarticular injection induced a degenerative contralateral signal, which was abolished by spinal cord compression and by pretreatment with the NK-1 antagonist. Intraarticular injection of 1 microg CFA also induced an ipsilateral increase of anabolism, which was enhanced by spinal cord compression. Similar results were obtained after intraarticular injections of substance P. These effects were not reproduced with turpentine treatment, a systemic model, in which spinal cord compression had no effect. CONCLUSION A unilateral inflammation can induce, by neurogenic mechanisms, distal bilateral degeneration of articular cartilage, implicating involvement of neuropeptides.
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Affiliation(s)
- E Decaris
- Université Henri Poincaré-Nancy I, Vandoeuvre-lès-Nancy, France
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Gegout-Pottie P, Philippe L, Simonin MA, Guingamp C, Gillet P, Netter P, Terlain B. Biotelemetry: an original approach to experimental models of inflammation. Inflamm Res 1999; 48:417-24. [PMID: 10493158 DOI: 10.1007/s000110050481] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Abstract
Biotelemetry is a new biological technology which evaluates continuous spontaneous locomotor activity and body temperature in rodents. The telemetry system comprises a transmitter implanted in the peritoneal cavity of the rodent, and a receiver placed beneath the animal's cage. The receiver detects the radio waves and the activity of the rodents as counts which are registered in the computer system, and the adapter detects the calibrated body temperature. First, we showed that biotelemetric studies of different species (rats, guinea pigs, mice and gerbils) provide substantial information about their circadian rhythms. Second, using the most common examples employed in pharmacology of inflammation (hyperthermia, arthritis, ischemia-reperfusion and so on) biotelemetry has helped us to clarify the pathophysiological significance of the parameters of temperature and mobility in several experimental models in rodents.
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Affiliation(s)
- P Gegout-Pottie
- UMR 7561, CNRS-Université Nancy I, Faculté de Medecine, Vandoeuvre Les Nancy, France
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Casset-Senon D, Philippe L, Babuty D, Eder V, Fauchier L, Fauchier JP, Pottier JM, Cosnay P. Diagnosis of arrhythmogenic right ventricular cardiomyopathy by fourier analysis of gated blood pool single-photon emission tomography. Am J Cardiol 1998; 82:1399-404. [PMID: 9856927 DOI: 10.1016/s0002-9149(98)00649-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
To evaluate the diagnostic performance of Fourier phase analysis of gated blood pool single-photon emission computed tomography (GBP SPECT) in arrhythmogenic right ventricular (RV) cardiomyopathy, 18 patients with confirmed arrhythmogenic RV cardiomyopathy underwent GBP SPECT and x-ray cineangiography. Results were compared with data obtained with GBP SPECT in 10 control subjects. This 3-dimensional method demonstrated good correlation with cineangiography for measurements of RV enlargement and extent of the disease; RV and left ventricular segments were analyzed with the same accuracy. Tomographic abnormalities were significant decreased RV ejection fraction, RV dilatation, nonsynchronized contraction of the ventricles, increased RV contraction dispersion, presence of segmental RV wall motion disorders and/or phase delays, and occasionally regional left ventricular abnormalities. RV-delayed phase areas were always present in our population. A scoring system with RV criteria was proposed to diagnose RV disease. Because Fourier analysis of GBP SPECT provides ventricular morphologic information for the right ventricle with the same accuracy as for the left ventricle, it may replace planar radionuclide studies. Therefore, this method is helpful in patients with a strong clinical suspicion of arrhythmogenic RV cardiomyopathy, and should be used as a screening method before right ventriculography.
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Affiliation(s)
- D Casset-Senon
- Nuclear Medicine Department, UMR CNR 6542, Trousseau Hospital, Tours, France
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Affiliation(s)
- Hans G. Jenniskens
- FOM-Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, Netherlands
| | - Laurent Philippe
- FOM-Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, Netherlands
| | - Malcolm Kadodwala
- FOM-Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, Netherlands
| | - Aart W. Kleyn
- FOM-Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, Netherlands
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Jenniskens HG, Philippe L, van Essenberg W, Kadodwala M, Kleyn AW. Tert-butyl nitrite surface photochemistry: The transition from submonolayer to multilayer behavior. J Chem Phys 1998. [DOI: 10.1063/1.475540] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
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