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Radiation Risks of Kidney during Abdominal CT Procedures in Morocco: A Multicentre Study

Journal of Biosciences and Medicines 2021年第5期9卷 86-93页

作者： Bouchra Amaoui slimane semghouli Fatima Safini Abdelmajid Choukri Faculty of Medicine and Pharmacy Ibn Zohr University Agadir Morocco Higher Institute of Nursing Professions and Health Techniques Agadir Morocco Regional Center of Oncology Agadir Morocco Materials and Subatomic Physics Laboratory University of Ibn Tofail Kenitra Morocco

This study aimed to estimate renal effective dose during abdominal CT scans in order to assess the renal risks of cancer and heredity per procedure in Moroccan hospitals. It’s consisted of examining a total of 120 patients referred to three radiology departments for an abdominal CT scan at the rate of 40 per hospital. The data that collected for this diagnostic exam included scanner acquisition parameters, number of series, use of the contrast medium, and rotation time as well as slice thickness, the displayed CT dose index (CTDIvol) and the Dose Length Product (DLP). Renal dose, effective dose and biological risks were estimated using the International Commission on Radiological Protection (ICRP) conversion factor. The patients included in this study were an average age of the (46.49 ± 14.16) years and an average weight of (73.34 ± 7.58) kg. For the mean effective dose (E) and average kidney dose (DK) received per patient during an abdominal CT scan, it were respectively of (6.67 ± 2.73) and (18.26 ± 7.74) mSv. The distribution of these values according to the hospital variable shows a difference in mean effective dose of the order of 0.26, 0.38 and 1.45 mSv and a difference in the mean renal dose of the order of 8.76, 4.94 and 0.48 mSv respectively for H1, H2 and H3. The induction cancer risk of abdominal and kidney per 105 procedures was respectively of 3 and 10. The kidney cancer risk by procedure is two to three times more likely than abdominal. For hereditary risk of abdominal and renal exposure per 106 procedures, it is 14 and 21 respectively. The renal stochastic effect by procedure is also two to three times more likely than that of the abdomen. Our values are relatively higher than those of published in some previous studies. Cancer risk and heredity estimation highlights the need to limit radiation dose. This first ever survey confirmed the need to improved training of health professionals invo

关键词： Abdominal CT Scans Effective Renal Dose Cancer and Heredity Risks

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Evaluation of setup errors in conformal radiotherapy for pelvic tumours: Case of the Regional Center of Oncology, Agadir

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Radiation Medicine and Protection 2020年第2期1卷 99-102页

作者： Bouchra Amaoui Abdellah Hadaoui Dounia Mouhssine slimane semghouli Radiotherapy Department Regional Center of Oncology AgadirMorocco Al Kindy Treatment Center of Oncology and Diagnosis Casablanca Morocco Higher Institute of Nursing Professions and Health Techniques Agadir Morocco

Context:The errors made during repetitive patient placements affect significantly the accuracy of treatment and the results of ***:To determine the total,systematic and random error in order to estimate the margin between the Clinical Target Volume(CTV)and the Planning Target Volume(PTV)in the pelvic *** and methods:Set up errors was estimated by superimposing a digitally reconstructed radiograph(DRR)as a reference image with an electronic portal image device(EPID).The total errors in the Medio-Lateral(ML),Cranio-Caudal(CC)and Antero-Posterior(AP)directions were compared by *** systematic and random errors,the ratio of variance(F statistic)was *** were calculated using Van Herk ***:208 images(80 DRRs and 128 EPIDs)were *** systematic error ranged from 1.93 to 2.01 mm,1.26 to 1.39 mm,and 1.20 to 2.94 mm in the x,y and z-axis,*** random error ranged from 2.33 to 2.90 mm,1.25 to 1.66 mm,and 1.04 to 1.28 *** PTV margin according to the Van Herk equation in the x,y and z directions was estimated to be 7.11,4.64 and 3.90 mm for the cervix uteri and a 6.47,4.03,and 3.70 mm for the ***:The use of weekly EPID/DRR allows estimating the setup of the planning target volume(PTV)expansion according to our *** this study,the evaluated set up margin was approximately 8 mm in the X-axis,5 mm in Y and Z axis for pelvic conformal radiotherapy.

关键词： radiotherapy pelvic conformal

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Combination of immunotherapy-radiotherapy in non-small cell lung cancer: Reality and perspective

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Radiation Medicine and Protection 2021年第4期2卷 160-164页

作者： Bouchra Amaoui Issam Lalya Fatima Safini slimane semghouli Faculty of Medicine and Pharmacy Ibn Zohr UniversityAgadirMorocco Regional Center of Oncology AgadirMorocco Mohammed-V Military Training Hospital Mohammed-V UniversityRabatMorocco Higher Institute of Nursing Professions and Health Techniques AgadirMorocco

The aim of this review was to examine the theoretical,preclinical and clinical bases of the combination radiotherapy immunotherapy in the management of non-small cell lung cancer(NSCLC).Preclinical studies have shown that in addition to its well-established tumoricidal effects,radiotherapy can activate the host immune system and modify the tumor *** is currently part of the therapeutic arsenal of the NSCLC given its capacity to restore the host's immune system's ability to recognize and destroy tumor *** combination of radiotherapy and immunotherapy seems to be synergistic,particularly with inhibitors of immune *** association has become standard in the metastatic stages and especially in consolidation after radiochemotherapy in the locally advanced,unresectable and stable *** questions remain unanswered including the optimal sequence of this combination,the type of radiotherapy(hypo-fractionated or normofractionated),the association of several immunotherapies and the cross-toxicity of the *** association of radiotherapy and immunotherapy is a promising treatment.

关键词： Radiotherapy Immunotherapy NSCLC Abscopal effect Immune checkpoint inhibitors

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Physicians’knowledge about radiation protection of patients during prescription of CT scan procedures in Morocco

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Radiation Medicine and Protection 2023年第1期4卷 54-59页

作者： Bouchra Amaoui Fatima Safini Laila Lahlou Mohamed El Fahssi Sanae Abbaoui slimane semghouli Faculty of Medicine&Pharmacy University Ibn ZohrAgadirMorocco Regional Center of Oncology AgadirMorocco Higher Institute of Nursing Professions and Health Techniques AgadirMorocco

Objective:To evaluate the knowledge and practices of Moroccan physicians in terms of radioprotection of patients when prescribing computed tomography(CT)***:This is a cross-sectional study in which a questionnaire with 23 multiple-choice questions was sent to prescribers of CT examinations such as radiotherapists(RMs),other medical specialists(OMSs),general practitioners(GPs)and residents/interns(R/Is).The first eight questions asked about the demographics of the participants,while the remaining questions asked about knowledge of ionizing radiation examinations,doses received,relative risks,and patient radiation safety ***:A total of 223 physicians participated in this *** therapists,considered as the reference group,had a better knowledge of irradiating and non-irradiating imaging compared to the other groups(P=0.003).Thus,67%of the reference group declared to take into account the number of scans performed by the patient during the last year,unlike the other groups(P=0.002).Furthermore,the knowledge of the different groups about the risks related to exposure to ionizing radiation was globally low(2%)(P=0.73).Regardless of their specialties and seniority,only 12%of the participants informed the patient at the time of prescription about the risks of ***,only 21%of the participants declared having had training in radiation protection,with no significant differences between the subgroups(P=0.832).Conclusions:The results obtained are similar to those reported in previous *** show that Moroccan prescribers have a low level of knowledge of the risks associated with CT *** on patient radiation protection should be included in the initial curriculum of interns and the continuing professional development of physicians should be reinforced.

关键词： CT Ionizing radiation Radiation protection X-rays Radiation risks

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Survey of current practices in the management of cervical cancer by Moroccan radiotherapists

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Radiation Medicine and Protection 2024年第2期5卷 124-130页

作者： Bouchra Amaoui slimane semghouli Hanane El Kacemi Issam Lalya Nadia Benchekroune Fatima Safini Sanae Abbaoui Biotechnology and Medicine(BioMed)Laboratory Faculty of Medicine and PharmacyIbn Zohr UniversityAgadirMorocco Souss Massa University Hospital Center AgadirMorocco Higher Institute of Nursing Professions and Health Techniques AgadirMorocco Mohammed-V University RabatMorocco National Institute of Oncology(INO) RabatMorocco Mohammed-V Military Instruction Hospital RabatMorocco Hassan II University CasablancaMorocco Mohammed VI Oncology Center-Casablanca University Hospital CasablancaMorocco Regional Oncology Center AgadirMorocco

Objective:To assess the applicability degree of the international guidelines by Moroccan radiotherapists,in order to improve the management of cervical cancer(CC),since CC is the second most common cancer for women in ***:This cross-sectional study was carried out using a questionnaire sent online to Moroccan *** questionnaire covered participants'characteristics,initial assessment and treatment preparation,techniques and indications for radiotherapy and brachytherapy,dose and indications,as well as on the protocol adopted in the intermediate stages and the location of adjuvant treatments and assessments'***:74 radiotherapists out of 300 have responded to the *** 27.0%of practitioners reported discussing patient records systematically in a multidisciplinary consultation meeting(MCM).For the initial assessment,77.0%requested pelvic magnetic resonance imaging(MRI).It is significantly less requested in regional oncology centers(ROCs)than in university hospital centers(UHCs)or the private sector(P<0.001).Furthermore,Clinicians in ROCs do not have access to new techniques of *** 83.8%of cases,the most prescribed radiotherapy protocols were 45–46 Gy in 1.8–2 Gy per ***-dimensional gynaecological brachytherapy high-throughput dose guided by dosimetric scanner was available in 75.5%of structures while interstitial gynaecological brachytherapy was only available in 23%of *** two most prescribed dose protocols were 47 Gy and 37 Gy in 74.4%and 21.6%of cases,***,monitoring during the first two years was based mainly on pelvic MRI(82.2%)while PET/CT was recommended by only less than 10%.Conclusions:The findings obtained show that our radiotherapists generally comply with international guidelines for the cervical cancer ***,they should still enhance their practices for the first staging evaluation,the use of systematic MCMs,the doses and treatment techniques used,and

关键词： Radiotherapy Brachytherapy Cervical cancer Morocco

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Geodesic equation in non-commutative gauge theory of gravity

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Chinese Physics C 2022年第10期46卷 193-206页

作者： Abdellah Touati slimane Zaim Laboratoire de Physique des Rayonnements et de leurs Interactions avec la Matiere Departement de Physique Faculte des Sciences de la Matiere Universite de Batna-1Batna 05000Algeria Departement de Physique Faculte des Sciences de la Matière Universitéde Batna-1Batna 05000Algeria

In this study,we construct a non-commtative gauge theory of the modified structure of the gravitational field using the Seiberg-Witten map and the general tetrad fields of Schwarzschild space-time to show that the noncommutative geometry removes the singularity at the origin of the black hole,thus obtaining a non-singular Schwarzschild black *** geodetic structure of this black hole presents new types of motion next to the event horizon within stable orbits that are not allowed by the ordinary Schwarzschild *** noncommutative periastron advance of the Mercury orbit is obtained,and with the available experimental data,we find a parameter of non-commutativity on the order of 10^(-25)s·kg^(-1).This result shows that the new fundamental length,√h■,is on the order of 10^(-31)m.

关键词： non-commutative geometry gauge gravity Schwarzschild space-time geodesic equation

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New design of ferroelectric solar cell combined with luminescent solar concentrator

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Chinese Physics B 2019年第8期28卷 417-424页

作者： slimane Latreche Mohamed Fathi Abderrahmane Kadri Unité de Développement des Equipements Solaires UDES/Centre de Développement des Energies RenouvelablesCDERTipaza 42415Algeria Laboratoire d'Etude des Matériaux Optoélectronique & Polymères Department of PhysicsUniversity of Oran 1 Ahmed Ben BellaBP 1524 El M'NaouerOran 31000Algeria

A new transparent photovoltaic panel composed of a luminescent solar concentrator and Al/BaTiO3/ZnO/Pt ferroelectric solar cells is presented,in which a portion of the incoming solar illumination is converted by the fluorophores to ultraviolet(UV)light which is then absorbed by ***,the solar cells are simulated using ***,the panel is modelled based on the obtained solar cell *** panel would be of great importance for building integrated photovoltaics domain because of its high transparency.

关键词： Atlas-Silvaco ferroelectric solar cell luminescent solar concentrator building integrated photovoltaic

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Synthesis of glass ceramics from kaolin and dolomite mixture

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International Journal of Minerals,Metallurgy and Materials 2017年第2期24卷 194-201页

作者： Mohamed Reda Boudchicha Fausto Rubio slimane Achour Engineering Mechanics and Materials Laboratory Mechanical Engineering Department Faculty of Technology Universite 20 Aout 1955 de Skikda Skikda 21000 Algeria Ceramics and Glass Institute Consejo Superior de Investigaciones Cientificas Madrid 28049 Spain National Polytechnic School Constantine 25000 Algeria

Cordierite- and anorthite-based binary glass ceramics of the CaO-MgO-Al2O3-SiO2 （CMAS） system were synthesized by mixing local and abundant raw minerals （kaolin and doloma by mass ratio of 82/18）. A kinetics study reveals that the activation energy of crystalli- zation （Ea） calculated by the methods of Kissinger and Marotta are 438 kJ·mol^-1 and 459 kJ·mol^-1, respectively. The Avrami parameter （n） is estimated to be approximately equal to 1, corresponding to the surface crystallization mechanism. X-ray diffraction （XRD） analysis shows that the anorthite and cordierite crystals are precipitated from the parent glass as major phases. Anorthite crystals first form at 850℃, whereas the μ-cordierite phase appears after heat treatment at 950℃. Thereafter, the cordierite allotropically transforms to α-cordierite at 1000℃. Complete densification is achieved at 950℃; however, the density slightly decreases at higher temperatures, reaching a stable value of 2.63 kg·m^-3 between 1000℃ and 1100℃, The highest Vickers hardness of 6 GPa is also obtained at 950℃. However, a substantial decrease in hardness is recorded at 1000℃; at higher sintering temperatures, it slightly increases with increasing temperature as the ct-cordierite crystallizes.

关键词： glass ceramics kaolinite dolomite crystallization activation energy

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Railway ground vibration and mitigation measures: benchmarking of best practices

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Railway Engineering Science 2022年第1期30卷 1-22页

作者： slimane Ouakka Olivier Verlinden Georges Kouroussis Department of Theoretical Mechanics Dynamics and VibrationsFaculty of EngineeringUniversity of MonsMonsBelgium

Vibration and noise aspects play a relevant role in the lifetime and comfort of urban areas and their *** the different sources,the one coming from the rail transit system will play a central concern in the following years due to its ***-borne vibration and noise assessment as well as techniques to mitigate them become key elements of the environmental impact and the global enlargement planned for the railway *** paper aims to describe and compare the different mitigation systems existing and reported in liter-ature through a comprehensive state of the art analysis providing the performance of each ***,an introduction to the ground-borne vibration and noise gen-erated from the wheel-rail contact and its propagation through the transmission path is ***,the impact and the different ways of evaluating and assessing these effects are presented,and the insertion loss indicator is ***,the different mitigation measures at different levels(vehicle,track,transmission path and receiver)are discussed by describing their possible appli-cation and their efficiency in terms of insertion ***,a summary with inputs of how it is possible to address the future of mitigation systems is reported.

关键词： Ground-borne noise and vibration Railway dynamics Urban railway Vibration mitigation Insertion loss Vibration isolation

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5-Nitro-1,2,4-triazole-3-one:A Review of Recent Advances

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含能材料 2019年第4期27卷 326-347,I0007页

作者： Sabrina Hanafi Djalal Trache slimane Abdous Zineddine Bensalem Abderrahmane Mezroua UER Procedes Energetiques Ecole Militaire Polytechnique

The 3?Nitro?1,2,4?triazole?5?one(NTO)is a high energy density materials of keen interest for both commercial and scientific worlds owing to its reduced sensitivity,better thermal stability and high performances. It plays a significant role to replace the current energetic ingredients. In this review,we summarize various strategies involved in the synthesis of NTO as well as the existing approaches to tailor its particle morphology and sizes. The most prominent properties of NTO,such as insensitivity and performance,which are usually required to produce efficient formulations,have been concisely discussed. In addition,this overview reports on some newer forms of NTO including derivatives and co?crystals available in the literature,which can enhance the NTO features and extend its applications. The advantages and shortcomings of various NTO forms for specific and potential use are also highlighted together with the attempts made to overcome these issues. Therefore,efforts will certainly continue to improve characteristics and performances of NTO either by chemical modification or by co?crystallization in order to produce promising formulations for widespread applications in the near future.

关键词： Triazolone 3-nitro-1,2,4-triazole-5-one(NTO) synthesis properties particle morphology derivatives co-crystals applications

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