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Bai Q, Perrin M, Sauvan C, Hugonin JP, Lalanne P. Efficient and intuitive method for the analysis of light scattering by a resonant nanostructure. OPTICS EXPRESS 2013; 21:27371-82. [PMID: 24216959 DOI: 10.1364/oe.21.027371] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We present a semi-analytical formalism capable of handling the coupling of electromagnetic sources, such as point dipoles or free-propagating fields, with various kinds of dissipative resonances with radiation leakage, Ohmic losses or both. Due to its analyticity, the approach is very intuitive and physically-sound. It is also very economic in computational resources, since once the resonances of a plasmonic or photonic resonator are known, their excitation coefficients are obtained analytically, independently of the polarization, frequency or location of the excitation source. To evidence that the present formalism is very general and versatile, we implement it with the commercial software COMSOL, rather than with our in-house numerical tools.
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Mattout J, Perrin M, Bertrand O, Maby E. Améliorer les ICM non invasives pour un possible usage en clinique : exemple du « P300-speller ». Ann Phys Rehabil Med 2013. [DOI: 10.1016/j.rehab.2013.07.958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Mattout J, Perrin M, Bertrand O, Maby E. Improving non-invasive BCI for possible clinical application: Example of the “P300-speller”. Ann Phys Rehabil Med 2013. [DOI: 10.1016/j.rehab.2013.07.963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Glaus J, Vandeleur C, Gholam-Rezaee M, Castelao E, Perrin M, Rothen S, Bovet P, Marques-Vidal P, von Känel R, Merikangas K, Mooser V, Waterworth DM, Waeber G, Vollenweider P, Preisig M. Atypical depression and alcohol misuse are related to the cardiovascular risk in the general population. Acta Psychiatr Scand 2013; 128:282-93. [PMID: 23216242 DOI: 10.1111/acps.12057] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/02/2012] [Indexed: 12/13/2022]
Abstract
OBJECTIVE The aims of the present study were to assess the associations between mood, anxiety and substance use disorders, including their subtypes, and the prevalence of cardiovascular risk factors (CVRFs). METHOD Thorough physical investigations, biological measures and standardized interview techniques were used to assess 3716 subjects of an urban area, aged 35-66 years. RESULTS Atypical depression was associated with increased prevalence of overweight, diabetes and the metabolic syndrome (OR = 1.5, 95% C.I. 1.1-2.0; OR = 2.0, 95% C.I. 1.1-3.5, OR = 1.6, 95% C.I. 1.0-2.4 respectively), whereas decreased prevalence of overweight was found in melancholic (OR = 0.7, 95% C.I. 0.6-0.9) and unspecified depression (OR = 0.8, 95% C.I. 0.7-1.0). Alcohol abuse was associated with diabetes (OR = 1.8, 95% C.I. 1.1-2.9) and dyslipidemia (OR = 1.3, 95% C.I. 1.0-1.8), alcohol dependence with dyslipidemia only (OR = 1.4, 95% C.I. 1.0-2.0). Almost all mental disorders were associated with a lifetime history of regular cigarette smoking, and atypical depression, alcohol misuse and drug dependence were associated with inactivity. CONCLUSION To conclude results emphasize the need to subtype depression and to pay particular attention to the atypical subtype. Comorbid alcohol misuse may further increase the cardiovascular risk. Efforts to diminish smoking in subjects with mental disorders could be crucial measures to reduce their high incidence of cardiovascular disease.
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Perrin M, Prevot M, Mankinen EA. Low intensity of the geomagnetic field in Early Jurassic time. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/91jb00871] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lawson PR, Poyneer L, Barrett H, Frazin R, Caucci L, Devaney N, Furenlid L, Gładysz S, Guyon O, Krist J, Maire J, Marois C, Mawet D, Mouillet D, Mugnier L, Pearson I, Perrin M, Pueyo L, Savransky D. On Advanced Estimation Techniques for Exoplanet Detection and Characterization Using Ground-based Coronagraphs. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2012; 8447. [PMID: 26347393 DOI: 10.1117/12.925099] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The direct imaging of planets around nearby stars is exceedingly difficult. Only about 14 exoplanets have been imaged to date that have masses less than 13 times that of Jupiter. The next generation of planet-finding coronagraphs, including VLT-SPHERE, the Gemini Planet Imager, Palomar P1640, and Subaru HiCIAO have predicted contrast performance of roughly a thousand times less than would be needed to detect Earth-like planets. In this paper we review the state of the art in exoplanet imaging, most notably the method of Locally Optimized Combination of Images (LOCI), and we investigate the potential of improving the detectability of faint exoplanets through the use of advanced statistical methods based on the concepts of the ideal observer and the Hotelling observer. We propose a formal comparison of techniques using a blind data challenge with an evaluation of performance using the Receiver Operating Characteristic (ROC) and Localization ROC (LROC) curves. We place particular emphasis on the understanding and modeling of realistic sources of measurement noise in ground-based AO-corrected coronagraphs. The work reported in this paper is the result of interactions between the co-authors during a week-long workshop on exoplanet imaging that was held in Squaw Valley, California, in March of 2012.
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Morcet J, Perrin M, Trégaro M, Carré F, Deugnier Y. Mortalité d’une cohorte de 514 cyclistes de haut niveau. Sci Sports 2012. [DOI: 10.1016/j.scispo.2011.05.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rosedale M, Perrin M, Buccola N, Strauss S, Malaspina D. An evidence-based response to 'Genes and schizophrenia: a pseudoscientific disenfranchisement of the individual'. J Psychiatr Ment Health Nurs 2012; 19:83-4. [PMID: 22212134 DOI: 10.1111/j.1365-2850.2011.01834.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kleinhaus K, Harlap S, Manor O, Margalit-Calderon R, Perrin M, Opler M, Lichtenberg P, Malaspina D. P-1390 - Prenatal stress and affective disorders in a population birth cohort. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)75557-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Gordon BK, Jaaniste T, Bartlett K, Perrin M, Jackson A, Sandstrom A, Charleston R, Sheehan S. Child and parental surveys about pre-hospitalization information provision. Child Care Health Dev 2011; 37:727-33. [PMID: 21198777 DOI: 10.1111/j.1365-2214.2010.01190.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND There is little available information about what children and parents would like to know about a forthcoming hospitalization and what they currently receive. METHODS The current study was a survey of 102 children between the ages of 6 and 10 years and their parents recruited either from the Recovery Unit following day surgery or from the wards following overnight admissions at Sydney Children's Hospital, Australia. Information was obtained about each child's experience in hospital, the nature and format of information that they had received prior to the admission, and what information the child/parent thought would be helpful to receive. RESULTS Parents recorded a total of 163 questions asked by children prior to their admission. Questions related to timing (e.g. duration of admission, length of procedure), pain, procedural information, anaesthesia, needles, whether parents can be present, activities to do in hospital, seeking explanations ('Why' questions), hospital environment, seeking reassurance and miscellaneous questions. Children who were satisfied with the amount of information they received before coming to hospital subsequently reported that they would be significantly less scared should they need to come back to hospital for a future procedure. A total of 46.7% of children received information about their hospitalization from their parent(s) and a further 12% from a doctor and parent. CONCLUSIONS Children were found to have many questions about a forthcoming hospitalization. Parents were found to have a major role as information providers. Further research is needed to assess parental confidence and competence to meet their child's information needs.
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Lecompte Y, Roussel O, Perrin M. Impact of lowering confirmation cut-off values in urine cannabis testing program. Toxicol Lett 2011. [DOI: 10.1016/j.toxlet.2011.05.1003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Perrin M. European Venous Forum: first hands-on workshop of venous diseases. INT ANGIOL 2011; 30:192-196. [PMID: 21427657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Harlap S, Antonius D, Kleinhaus K, Perrin M, Lichtenberg P, Manor O, Malaspina D. FC21-06 - Schizophrenia after the 1941 farhud (a pogrom in IRAQ); a study of 6,781 IRAQI-born men and women observed as parents in the jerusalem cohort. Eur Psychiatry 2011. [DOI: 10.1016/s0924-9338(11)73636-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
IntroductionMaternal stress during pregnancy has been associated with schizophrenia in some settings with evidence suggesting that male and female offspring might be affected differently.Objectives/aimsIn an outbreak of violence in 1941, at least 180 Jews died in Baghdad; rapes, beatings and property damage injured hundreds more in other towns. We questioned whether this stress might be reflected in any change in schizophrenia incidence in people born in 1941.MethodsWe studied admissions to psychiatric hospitals in 39,606 men and 41,208 women, parents of the population-based Jerusalem cohort. We used proportional hazards models to estimate relative incidence of schizophrenia in various groups, over time. Subjects were followed from age in 1950 or immigration, till age at first hospital admission, death or 2004. Schizophrenia was defined by discharge diagnosis, ICD-10 = F20–F29 at any hospital event. Models controlled for secular and cyclic time trends.ResultsFor all years combined, the 3,679 male immigrants from Iraq showed a schizophrenia incidence similar to other men (relative risk RR = 0.92, 95% confidence limits 0.67–1.26). But for 141 men born in Iraq in 1941, RR = 4.12 (1.67–10.2, p = .0021 based on 6 cases), compared with men from Iraq born in all other years. Among other men, RR for 1941 births was 1.21 (0.78–1.88,). Women from Iraq showed no significant findings.ConclusionsThese findings enlarge on long-term consequences of ethnic violence. They raise intriguing questions about the relative resilience of the sexes, but should be interpreted cautiously, given that all subjects in this cohort had been able to reproduce.
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Canale S, Rodrigo S, Tourdias T, Mellerio C, Perrin M, Souillard R, Oppenheim C, Meder JF. [Grading of adults primitive glial neoplasms using arterial spin-labeled perfusion MR imaging]. J Neuroradiol 2011; 38:207-13. [PMID: 21353707 DOI: 10.1016/j.neurad.2010.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2010] [Revised: 12/05/2010] [Accepted: 12/12/2010] [Indexed: 11/29/2022]
Abstract
PURPOSE We investigated the relationship between tumor blood-flow measurement based on perfusion-imaging by arterial spin-labeling (ASL) and histopathologic findings in adults' primitive glial tumours. PATIENTS AND METHODS Thus, 40 primitive brain tumors (8 low-grade and 32 high-grade gliomas according to the Sainte-Anne classification) were imaged using pulsed (n=19) or continuous (n=21) ASL. Relative cerebral blood flow (rCBF=tumoral blood flow/normal cerebral blood flow) between high- and low-grade gliomas were compared. RESULTS Using pulsed ASL, differences in mean rCBF were observed in high- and low-grade gliomas although no significant (respectively 1.95 and 1.5). Using continuous ASL, mean rCBF were significantly higher for high-grade than for low-grade gliomas (P<0.05). High-grade gliomas could be discriminated using a CBF threshold of 1.18, with a sensitivity of 88%, specificity of 60%, predictive positive value of 88%, and predictive negative value of 60%. CONCLUSION ASL-based perfusion provides a quantitative, non-invasive alternative to dynamic susceptibility contrast perfusion MR methods for evaluating CBF. ASL is a suitable method for gliomas initial staging and could be useful to identify intermediate tumoral evolution.
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Kleinhaus K, Harlap S, Perrin M, Manor O, Weiser M, Lichtenberg P, Malaspina D. Age, sex and first treatment of schizophrenia in a population cohort. J Psychiatr Res 2011; 45:136-41. [PMID: 20541769 PMCID: PMC2945697 DOI: 10.1016/j.jpsychires.2010.05.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 05/04/2010] [Accepted: 05/07/2010] [Indexed: 01/23/2023]
Abstract
OBJECTIVE Schizophrenia affects men more than women, but this may not be true at all ages. This study examines the incidence of first hospitalization for treatment of schizophrenia in each sex over different ages. METHODS We compared the incidence of first admission for treatment in a cohort of 46,388 males and 43,680 females followed from birth until ages 29-41, using life tables and proportional hazards methods. RESULTS Life table estimates of cumulative incidence by age 40 were 1.44% in males and 0.86% in females. For over all ages the relative risk (RR) in males was 1.6 (95% confidence limits=1.4-1.8) compared with females. Before age 17 there was no significant difference between the sexes (RR=0.86, 0.56-1.3). Excess risk in males was observed only from age 17 (RR=1.7, 1.4-1.9). There was no evidence of the incidence in females catching up with that in males, during the 30s. CONCLUSION In this population, there was a significant change, over age, in the relative incidence of first hospitalization for schizophrenia between the sexes; the excess incidence in males first developed at age 17.
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Perrin M, Ramelet AA. Pharmacological treatment of primary chronic venous disease: rationale, results and unanswered questions. Eur J Vasc Endovasc Surg 2010; 41:117-25. [PMID: 21126890 DOI: 10.1016/j.ejvs.2010.09.025] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2010] [Accepted: 09/30/2010] [Indexed: 10/18/2022]
Abstract
AIM The aim of this article was first to review the complex pathophysiological mechanisms responsible for symptoms and signs of primary chronic venous disease (CVD) that allow the identification of targets for pharmacological treatment. The results of CVD treatment with venoactive drugs (VADs) were emphasised and presented in the form of recommendations. The last section raises key questions to be answered to improve protocols for good clinical trials and to draw up future guidelines on these agents. METHODS The literature has been reviewed here using PubMed and Embase. RESULTS Venous hypertension appears to underlie all clinical manifestations of primary CVD. Inflammation is key in wall remodelling, valve failure and subsequent venous hypertension. Changes in the haemodynamics of veins are transmitted to the microcirculation, resulting in capillary alteration leading to oedema, skin changes and eventually venous ulceration. Venous symptoms may be the result of interplays between pro-inflammatory mediators and nerve fibres located in the venous wall. Therefore, venous inflammation constitutes a promising therapeutic target for pharmacological intervention, and some available VADs could attenuate various elements of venous inflammation. Based on recent studies, reviews and guidelines, tentative recommendations for the use of VADs were proposed and strong recommendations were given to two of them (micronised purified flavonoid fraction and oxerutins). CONCLUSION VADs should be accorded a better role in the management of CVD. However, larger and more definitive clinical trials are needed to improve the existing recommendations.
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Auroy Y, Andreu G, Aullen JP, Benhamou D, Caldani C, Canivet N, de Lardemelle C, du Roure FD, François A, Gruber M, Sandid I, Linget C, Loulière B, Perrin M, Rebibo D, Richomme X, Tinard X. [Patient safety and root cause analysis]. Transfus Clin Biol 2010; 17:386-9. [PMID: 21050788 DOI: 10.1016/j.tracli.2010.09.167] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Accepted: 09/15/2010] [Indexed: 11/30/2022]
Abstract
Safety in the field of transfusion medicine has greatly improved in France. The risk of viral transmission has decreased by a factor greater than 1500 within the last 20 years. In comparison, the risk related to ABO error has decreased only by half. The reporting of critical incidents, which occur at any step of the transfusion procedure is now mandatory in France and is subject to an in-depth analysis, using methods close to that used in aviation safety. The goal of these analyses is to better understand human factors in order to implement more adequate prevention measures.
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Perrin M. Endovenous radiofrequency ablation of saphenous vein reflux. The VNUS Closure procedure with Closurefast. An updated review. INT ANGIOL 2010; 29:303-307. [PMID: 20671647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Endovenous treatment is progressively supplanting open surgery in treatment of saphenous reflux. Among the emerging techniques the VNUS Closure, procedure with ClosureFast is one of the most promising. The aim of the presente review is to remind the principle of radiofrequency action in varicose vein treatment, to describe the procedure achievement including the devices used generator and catheter and finally to report the published studies on ClosureFast. A research in the published literature identified only two articles reporting the outcome of procedure. The first one, a prospective, non-randomized international multicenter prospective clinical trial includes 296 great saphenous veins treated by radiofrequency with the ClosureFAST catheter under tumescent anesthesia. Occlusion rate at 6 months (62 extremities) was achieved in 99.6% with no recanalisation since the first ultrasound assessment at 3 days. The Venous Clinical Severity Score was significantly improved at 6 months compared with the baseline one. No serious adverse events were reported. The second one RECOVERY trial was a multicenter prospective randomized comparative clinical trial of the ClosureFAST catheter and endovenous 980-nm laser ablation including 69 patients. Final results showed patients treated with the ClosureFAST catheter experienced significantly less post-procedure pain, bruising and tenderness when compared to laser ablation, There were statistically fewer complications in limbs treated with the ClosureFAST catheter compared to laser ablation (P=0.021). In conclusion radiofrequency segmental thermal ablation with ClosureFAST catheter is feasible, safe, and well tolerated. Procedure is shortened and short-term results are better than those provided by the previous Closure catheter. A randomized control trial ClosureFAST versus endovenous laser is in favour of the first one.
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Lurie F, Kistner R, Perrin M, Raju S, Neglen P, Maleti O. Invasive treatment of deep venous disease. A UIP consensus. INT ANGIOL 2010; 29:199-204. [PMID: 20502406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Deep venous disease includes primary and/or secondary pathological changes in the deep venous system. These may consist of valve insufficiency, complete or incomplete vein obliteration and/or functional impairment.
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Menuel C, Guillevin R, Costalat R, Perrin M, Sahli-Amor M, Martin-Duverneuil N, Chiras J. Spectroscopie du phosphore 31 par résonance magnétique : applications en pathologies cérébrales. J Neuroradiol 2010; 37:73-82. [DOI: 10.1016/j.neurad.2009.07.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2009] [Revised: 07/09/2009] [Accepted: 07/31/2009] [Indexed: 11/30/2022]
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Perrin M, Salomon V. Gestion des risques en établissement de santé : des progrès à amplifier. Rev Epidemiol Sante Publique 2010. [DOI: 10.1016/j.respe.2010.02.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Cazaubon M, Allaert FA, Lugli M, Buresta P, Gobin JP, Perrin M. A French-Italian survey on the prevalence of isolated varices (C2) and complicated varices (C2+). Results of a multi-centre study conducted by the SFA and the SFP under the auspices of the European Venous Forum. INT ANGIOL 2010; 29:64-69. [PMID: 20224535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
AIM The advanced CEAP classification allows one to differentiate between isolated varicose veins (C2) and complicated varicose veins (C2, 3 - C2, 3, 4 - C2, 4 or C2, 3, 4, 5 etc) named (C2+). METHODS The main objective of this study was to identify when using the advanced classification the prevalence of isolated varicose veins (C2) and complicated varicose veins (C2+) among patients consulting vascular specialists and to compare their symptomatic status and the data issued from the advanced CEAP including also the headings, Anatomy (A), Etiology (E) and Pathophysiology (P). RESULTS 171 patients were evaluated, 100 in France and 71 in Italy. The prevalence of C2 and C2+ was the same in both countries: 64.4% in France and 63.3% in Italy. Also no difference was found in the prevalence of other descriptors: etiology, anatomy or pathophysiology. The time to complete the advanced form was less than 5 minutes for 65% of the investigators. CONCLUSION The advanced CEAP is easy to use in daily pratice. We have the same prevalence of patients in France and in Italy, who consulted for isolated varicose veins or associated with other signs of chronic venous disorders.
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Lehmann P, Monet P, de Marco G, Saliou G, Perrin M, Stoquart-Elsankari S, Bruniau A, Vallée J. A Comparative Study of Perfusion Measurement in Brain Tumours at 3 Tesla MR: Arterial Spin Labeling versus Dynamic Susceptibility Contrast-Enhanced MRI. Eur Neurol 2010; 64:21-6. [DOI: 10.1159/000311520] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2010] [Accepted: 03/31/2010] [Indexed: 11/19/2022]
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Perrin M, Henaff MA, Padovan C, Faillenot I, Merville A, Krolak-Salmon P. P4-17 Modification de la mémoire émotionnelle au stade léger de la maladie d’Alzheimer. Rev Neurol (Paris) 2009. [DOI: 10.1016/s0035-3787(09)72698-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Née G, Jehan-Besson S, Brun L, Revenu M, Hamon M, Hamon-Kérautret M, Perrin M. A MRI myocardial perfusion analysis tool. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2009; 2009:4387-4390. [PMID: 19964110 DOI: 10.1109/iembs.2009.5333479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
MRI myocardial perfusion analysis is an important element for the ischemic heart disorder assessment. The spatio-temporal analysis of the myocardial raising during the first crossing of a contrast bolus allows to identify the ischemic or hypoperfused areas. Such an analysis requires an accurate tracking of the myocardium on the whole sequence and a robust segmentation to identify pathological and healthy regions inside the myocardium. In this paper, we present a semiautomatic tracking tool and a segmentation algorithm based on statistical tests and a recent concentration theorem. We show experimental results for both the tracking step and the segmentation of hypoperfused areas to confirm the availability of this setting.
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