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Fast and Accurate Thoracic SPECT Image Reconstruction

Computer Modeling in Engineering & Sciences 2022年第5期131卷 881-904页

作者： Afef Houimli issam ben mhamed Bechir Letaief Dorra ben-Sellem University of Tunis El Manar Higher Institute of Medical Technologies of TunisResearch Laboratory in Biophysics and Medical Technologies LR13ES07Tunis1006Tunisia University of Tunis Higher National School of Engineers of TunisSignal Image and Energy Management Laboratory:LR13 ES03 SIMEENSITMontfleury1008Tunisia Faculty of Medicine of Tunis University of Tunis El ManarTunis1007Tunisia Nuclear Medicine Department Salah AZAIEZ InstituteTunis1006Tunisia

In Single-Photon Emission Computed Tomography(SPECT),the reconstructed image has insufficient contrast,poor resolution and inaccurate volume of the tumor size due to physical degradation ***,nonstationary filtering of the projection or the slice is one of the strategies for correcting the resolution and therefore improving the quality of the reconstructed SPECT *** paper presents a new 3D algorithm that enhances the quality of reconstructed thoracic SPECT images and reduces the noise level with the best degree of *** suggested algorithm is composed of three *** first one consists of denoising the acquired projections using the benefits of the complementary properties of both the Curvelet transformand theWavelet transforms to provide the best noise *** second step is a simultaneous reconstruction of the axial slices using the 3D Ordered Subset Expectation Maximization(OSEM)*** last step is post-processing of the reconstructed axial slices using one of the newest anisotropic diffusion models named Partial Differential Equation(PDE).The method is tested on two digital phantoms and clinical bone SPECT images.A comparative study with four algorithms reviewed on state of the art proves the significance of the proposed *** simulated data,experimental results show that the plot profile of the proposed model keeps close to the original one compared to the other ***,it presents a notable gain in terms of contrast to noise ratio(CNR)and execution *** proposed model shows better results in the computation of contrast metric with a value of 0.68±7.2 and the highest signal to noise ratio(SNR)with a value of 78.56±6.4 in real *** experimental results prove that the proposed algorithm is more accurate and robust in reconstructing SPECT images than the other *** could be considered a valuable candidate to correct the resolution of bone in the SPECT images.

关键词： SPECT image resolution correction thoracic SPECT images wavelet transform curvelet transforms 3D-OSEM PDE

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Bubble hydrodynamic influence on oxygen transfer rate at presence of cationic and anionic surfactants in electroflotation process

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Journal of Hydrodynamics 2013年第5期25卷 747-754页

作者： KOTTI Mariam KSENTINI issam ben MANSOUR Lassaad Laboratory of Applied Fluid Mechanics Process Engineering and EnvironmentScience Faculty of Sfax

In this work, the effects of the presence of surfactants in the liquid phase and the hydrodynamic regime of the bubble flow on the oxygen transfer rate were investigated in an electroflotation process in batch mode. The volumetric mass transfer coefficient KLα and the oxygenation capacity were evaluated to improve the performances of the electroflotation process in terms of oxygenation. In order to evaluate the liquid-side mass transfer coefficient KLα the volumetric mass transfer coefficient KLα was dissociated into KL and the specific interracial area （a） since the last one was obtained from the gas hold-up and the bubble diameter. The effect of Reynolds number which define the hydrodynamic of the bubble flow has been also studied. Models of KLa and KL have been established to show the effects of the hydrodynamic parameters and liquid phase characteristics on the oxygen transfer rate.

关键词： electroflotation mass transfer coefficient hydrodynamic parameters surfactant

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An unusual Monteggia equivalent type 1 lesion： Diaphyseal ulna and radius fractures with a posterior elbow dislocation in a child

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Chinese Journal of Traumatology 2018年第2期21卷 122-124页

作者： Lassaad Hassini Aymen Saidi Boujemaa Touati Aymen ben Fradj issam Aloui Abderrazek Abid Department of Orthopaedic Surgery University Hospital 5000 Monastir Tunisia

In this report, we describe an extremely unusual Monteggia equivalent type 1 lesion in a 10-year-old boy following a fall from a height of I m. On the plain radiographs, our patient had a particular Monteggia equivalent type 1 injury associating a posterior elbow dislocation with diaphyseal radius and ulna fractures. The patient was treated by closed reduction technique. At six months of follow-up, the frac- tures were consolidated and the elbow was stable. To our knowledge, only 8 adult cases and one pae- diatric observation with similar lesions had been reported through medical literature. Therefore, the aim of our case report is to remind this rare entity and also to provide a comprehensive review of the literature related to this uncommon lesion.

关键词： Monteggia equivalent Children Forearm fracture Elbow dislocation

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Modeling and Analysis of Low Frequency Noise in Ion-Field-Effect Transistors Sensors

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Modeling and Numerical Simulation of Material Science 2014年第3期4卷 119-127页

作者： Jihen Chermiti Sawsen Azzouzi Mounir ben Ali mhamed Trabelsi Abdelhamid Errachid Higher Institute of Applied Sciences and Technology of Sousse University of Sousse Sousse Tunisia Higher Institute of Applied Sciences and Technology of Sousse University of Sousse Sousse Tunisia Laborory Materials Molecules and Applications University of Carthage IPEST Tunis Tunisia Institute of Analytical Sciences of Lyon Université Claude Bernard Lyon 1 Lyon France

Ions Sensitive Field Effect Transistors (ISFETs) are becoming the platform sensors for important chemical and biomedical applications. However, the accuracy of ISFET output measurement is greatly affected by the presences of low-frequency noise, drift and slow response of the device. This requires more safety in measured results and the tools of analysis. In this paper, we present fundamental limits on the sensitivity of ISFETs micro-sensors, arising from intrinsic and extrinsic noise sources. We developed an algorithm in MATLAB in order to model the frequency analysis of the 1/f noise in ISFET sensor using Hooge theory. We have shown that the 1/f noise of the ISFETs sensors is due to both the electrochemical system (pH solution) and the MOS component (canal size, insulator thickness). The temperature effect on the ISFET noise and the signal conditioning are also performed.

关键词： Top-Spice Modeling Ion Sensitive Field Effect Transistor Low-Frequency Noise

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Origanum majorana Extracts as Mild Steel Corrosion Green Inhibitors in Aqueous Chloride Medium

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Journal of Environmental Protection 2016年第4期7卷 532-544页

作者： Hassen Challouf Nébil Souissi mhamed ben Messaouda Rym Abidi Adel Madani Tunis El Manar University Institut Préparatoire aux Etudes d’Ingénieurs El Manar Campus Universitaire El Manar Tunis Tunisia Carthage University Faculté des Sciences de Bizerte Laboratoire de Recherche “Application de la Chimie aux Ressources et Substances Naturelles et à l’Environnement” Jarzouna Tunisia Carthage University Institut Préparatoire aux Etudes Scientifiques & Techniques Laboratoire de Recherche “Matériaux Molécules et Applications” La Marsa Tunisia Carthage University Faculté des Sciences de Bizerte Laboratoire de Physique des Matériaux Jarzouna Tunisia

We optimized Origanum majorana (OM) extraction for mild steel corrosion inhibition in neutral 0.5 M chloride medium. The inhibition mechanism evolved in presence of the optimal extract was discussed when calculating the activation energy (Ea), the activation enthalpy (ΔaH) as well as the activation entropy (ΔaS). The OM extract molecules were investigated using the density functional theory (DFT) at B3LYP/6-31G(d,p) basis set level. 1-methyl-4-propan-2-ylcyclohexa-1,3-diene alpha-terpinene was predicted exhibiting the most inhibition capabilities.

关键词： Origanum majorana Corrosion Inhibition Mild Steel NaCl

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Extranodal Tuberculosis of Head and Neck: A Series of 29 Cases

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Journal of Tuberculosis Research 2019年第3期7卷 148-158页

作者： Sameh Mezri Ghassen Chebbi Manel Chebbi Sabrine Maamouri Rania ben mhamed Khemaies Akkari ENT Department Military Hospital of Tunis Tunis Tunisia

Background: Despite a re-increase in the incidence of tuberculosis, extranodal location on head and neck remains rare. Clinical symptomatology is non-specific and even data from paraclinical explorations often pose the problem of differential diagnosis with tumor pathology. Methods: We report a series of 29 cases of extranodal tuberculosis collected over a period of 32 years [1986-2018] in ENT department of the military hospital of Tunis. Results: Rhinosinusopharyngeal involvement was predominant (45%) followed by glandular involvement (14%). Diagnosis was histopathological in most cases. Concomitant pulmonary tuberculosis was detected in two cases and spinal lumbar in one case. Treatment was medical in all cases. Conclusion: Clinical presentation of extranodal tuberculosis is various and non-specific. Neoplastic pathology is the main differential diagnosis. However, diagnosis should be systematically raised in endemic countries. Treatment is essentially medical.

关键词： Tuberculosis ENT Extranodal

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Effectiveness of plant growth-promoting rhizobacterium Pantoea sp. BRM17 in enhancing canola growth on phosphogypsum-amended soil

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Pedosphere 2020年第4期30卷 570-576页

作者： Houda TRIFI issam benSALEM Naima KOLSI benZINA Amine FOURATI Maria Clara COSTA Wafa ACHOUAK Haitham SGHAIER Mouldi SAIDI Laboratory of Biotechnology and Nuclear Technology(LR16CNSTN01) National Center for Nuclear Sciences and Technology(CNSTN)Sidi Thabet Technopark 2020(Tunisia) Faculty of Sciences of Bizerte Carthage UniversityJarzouna 7021(Tunisia) Soil Sciences and Environment Laboratory National Institute of Agronomy of TunisiaTunis Mahrajene 1082(Tunisia) Tunisian Chemical Group Route de Gabes Km 3.5Sfax 3018(Tunisia) Centro de Ciencias do Mar Universidade do AlgarveCampus de GambelasFaro 8005-139(Portugal) Laboratory of Microbial Ecology of the Rhizosphere and Extreme Environment CEA CadaracheSaint Paul Lez Durance 13108(France) Laboratory of Energy and Matter for Development of Nuclear Sciences(LRJ6CNSTN02) National Center for Nuclear Sciences and Technology(CNSTN)Sidi Thabet Technopark 2020(Tunisia) Laboratory of Biotechnology and Bio-Georesources Valorization(LR1IES31) National Center for Nuclear Sciences and Technology(CNSTN)Sidi Thabet Technopark 2020(Tunisia)

Dear Editor,Phosphogypsum(PG)is the main by-product generated during phosphoric acid production from mineral *** contains mainly calcium sulfate dehydrate(CaSO4:2H2O),phosphate,fuoride,heavy metals,and radionuclides(Elloumi et al.,2015).Around 170×10^6 t PG is produced annually worldwide,although PG management is an environ-mental concern in several countries.

关键词： annually soil metals

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Predictive Factors of Multiple Hospitalizations for Acute Exacerbations of COPD

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Open Journal of Respiratory Diseases 2019年第3期9卷 61-74页

作者： Ahmed ben Saad Nesrine Fahem Asma Migaou Saousen Cheikh mhamed Samah Joobeur Naceur Rouatbi Pulmonology Department Fattouma Bourguiba Teaching Hospital Monastir Tunisia

Background: Multiple hospitalizations for acute exacerbations of chronic obstructive pulmonary disease (AECOPD) are associated with considerable morbidity and mortality. Objectives: To identify predictive factors of multiples hospitalizations for AECOPD. Methods: This is a retrospective single center study of consecutive patients with COPD hospitalized at the Department of Respiratory Medicine between January 1990 and December 2015. We calculated for each patient the mean number of hospitalizations for AECOPD/year (H/y). We distinguished 2 groups (G) of patients. G1: <2 H/y and G2: ≥2 H/y. Predictors of multiple admissions identified by univariate analysis were included in the multivariate analysis. Results: The study included 1167 COPD patients (mean age 67 ± 10 years, 97% males). Three hundred six (26%) COPD patients had a mean number of hospitalizations per year ≥ 2. Multivariate logistic regression analysis demonstrated that an mMRC ≥ 2 (Odd ratio [OR] 1.8, 95% confidence interval [CI] 1.08 - 2.99, p = 0.022), a low PaO2 (PaO2 OR 0.97, 95% CI 0.95 - 0.99, p = 0.007) and frequent exacerbations (OR 2.95, 95% CI 2.56 - 3.39, p < 0.001) are independent factors associated with multiple admissions for AECOPD. Conclusions: An mMRC ≥ 2, a low PaO2 and frequent exacerbations are independently associated with multiple hospitalizations for AECOPD. The identification of these high risk COPD patients will be helpful in the decision of intervention strategies.

关键词： COPD Hospitalization COPD Exacerbation Risk Factors Hospital Readmission

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Lemierre Syndrome Revealed by Orbital Cellulitis

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Open Journal of Pediatrics 2023年第6期13卷 900-906页

作者： issam Taha Ilham Tadmori Moustapha Hida Pediatric Emergency Department Faculty of Medicine and Pharmacy of Fez Sidi Mohamed-Ben-Abdellah University Fez Morocco Mother-Child Hospital Hassan II University Hospital Fez Morocco

Lemierre’s syndrome is a rare and severe sepsis, capable of rapidly compromising the vital prognosis in the absence of early intervention, characterized by an oropharyngeal infection complicated by septic thrombosis of the internal jugular vein and the formation of septic emboli primarily localized at the pulmonary level. We report the case of a 14-year-old boy, with no notable pathological history, who had presented for 15 days with unilateral orbital swelling which then became bilateral, all evolving in a context of fever.

关键词： Lemierre’s Syndrome Oropharyngeal Infection Jugular Septic Thrombosis Septic Embolism

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Niemann-Pick A/B Disease in a 13-Year-Old Child and Review of the Literature

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Open Journal of Pediatrics 2023年第6期13卷 907-913页

Niemann-Pick disease (NPD) refers to a group of patients who have varying degrees of lipid storage and foam cell infiltration in tissues, as well as overlapping clinical features, including hepatosplenomegaly, insufficiency pulmonary and/or central nervous system (CNS). Thanks to the pioneering work of Roscoe Brady and colleagues, we now know that there are two distinct metabolic abnormalities that explain NPD. The first is due to the deficient activity of the acid sphingomyelinase enzyme (ASM;NPD “types A and B”), and the second is due to defective functioning in the transport of cholesterol (NPD “type C”). We report the case of a 13-year-old adolescent diagnosed with Niemann-Pick A/B disease.

关键词： Nieman Pick Splenomegaly Hepatomegaly Enzymatic Test

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