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Dosimetric Evaluation of the Scanning Activity at the Regional Hospital of Kaolack (Senegal)

Open Journal of Biophysics 2021年第3期11卷 351-358页

作者： B. Ndong M. S. Djigo G. Akpo E. A. L. Bathily O. Diop A. R. Sanou A. K. Koutouan N. F. Badji F. Badji J. Wezzani K. Ka I. thiam G. Mbaye O. Ndoye M. Mbodj E. H. Niang Biophysics Laboratory and Nuclear Medicine Cheikh Anta Diop University FMPO Dakar Senegal Radiology and Medical Imaging Department of Aristide Le Dantec University Hospital Cheikh Anta Diop University Dakar Senegal Biophysics Laboratory and Nuclear Medicine UFR Medical Sciences University Félix-Houphouet Boigny Cocody Abidjan C&ocirc te d’Ivoire Radiothérapy Department of the National Hospital University Center Dalal Jamm Guédiaway Dakar Sénégal Physics Pharmaceutical Laboratory Cheikh Anta Diop University FMPO Dakar Senegal

The aim of this study was to evaluate the dose delivered to patients during scannographic examinations at the Kaolack Regional Hospital (one of the 14 regions of Senegal located in the center-west of the country, 192 km from Dakar) and to compare these irradiation doses at diagnostic reference levels found in the literature in order to optimize our scanning protocols. To achieve this goal, we carried out a prospective study involving 218 CT scans. These examinations focused on cerebral, thoracic, abdominopelvic and lumbar spine acquisitions made in adults and cerebral only in children. We compared the median values of dosimetric indicators (CTDIvol and DLP) per acquisition with NRDs in the literature. During the course of this study, we found a dosimetric ratio lower than that of the NRDs for thoracic, abdomino-pelvic and lumbar spine CT scans in adults and a significant dosimetric exceedance for brain scans in adults and in children. These results encourage us to extend these dosimetric evaluations to other hospital structures in order to establish rigorous monitoring of dosimetric indicators and to respect the principles of radiation protection and good practice.

关键词： Dosimetry CT DRL Senegal

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Three Dimensional Study of Spectral Response of Polycrystalline Silicon Solar Cells： Vertical Junction Frequency Modulation Scheme

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Journal of Energy and Power Engineering 2013年第5期7卷 903-906页

作者： Nouhou Bako Zeinabou Hawa Ly Diallo Aminata Gueye Camarat Moustapha thiam Dan Maza Abouzeidi Madougou Saidou Gregoire Sissoko Departement de Physique FST Universite de Maradi Maradi 65110 Niger Laboratoire des Semiconducteurs et d'Energie Solaire Departement de Physique FST Universitd Cheikh Anta Diop DakarSenegal Departement de Physique ENS Universite Abdou Moumouni de Niamey Niamey 10 963 Niger

In this paper, the modeling of a bifacial polycrystalline silicon solar cells vertical junction is presented. The study in dynamic frequency is limited to wavelengths from 400 nm to 1100 nm. The dependence of solar cell spectral response on wavelengths for several modulation frequencies was evaluated by using solar cell internal quantum efficiency. The objective is to characterize the polycrystalline silicon in 3D. The effect of frequency modulation pulsation on the phase of internal quantum efficiency was presented as well as values of shunt and series resistance for various grains size values. The results show that the value of maximum internal quantum efficiency is about 50% with a wavelength of 0.82 nm and a frequency of 10~3 rad/s under monochromatic illumination.

关键词：多晶硅太阳能电池光谱响应三维调频垂直量子效率动态频率调制频率

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Partial Ventricular Atrioventricular Canal Aged about a Case

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World Journal of Cardiovascular Diseases 2019年第1期9卷 51-55页

作者： C. A. thiam S. Sidibé Y. Camara S. Coulibaly A. K. Sacko H. O. Ba M. Diakite S. Diallo I. Sangaré S. J. B. Tougouma M. Konaté S. Sidibé A. Keita N. Sidibé S. Mariko M. Sako I. Menta B. Diallo Cardiology Department Hospital Kati Bamako Mali Cardiology Department Point “G” Hospital University Center Bamako Mali Cardiology Department Gabriel TOURE Hospital University Center Bamako Mali Cardiology Department Mother Hospital Child “le luxembourg” Bamako Mali Higher Institute of Health Sciences Nazi Boni de Bobo Dioulasso University Bobo Dioulasso Burkina Faso Cardiology Department Hospital Mali Bamako Mali Cardiology Department Hospital Tombouctou Tombouctou Mali

Introduction: The partial ventricular atrioventricular canal is a congenital heart malformation of the ostium primum type of variable surface that can reach the single atrium where the interatrial septum is no more than a cephalic muscular vestige attached to the roof of the atrium. His diagnosis at the age of 73 is not a common situation. The interest of this clinical case that we report lies in the peculiarity of its mode of discovery and its evolution under medical treatment. Observation. He was a 73-year-old patient with no known cardiovascular risk factor and has since been at about 18 years of age with heart failure syndrome with progressive dyspnea, cough and edema of the lower limbs, but never explored for lack of financial means, and the evolution was enamelled by episodes of cardiac decompensation, the last of which dated back to 03/07/2018 justifying a hospitalization in our service. Cardiac ultrasound shows a partial atrioventricular canal. The care was medical. Conclusion: The atrioventricular canal is a congenital heart disease complex of poor prognosis.

关键词： Partial Ventricular Atrioventricular Canal Heart Disease Mali

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An Earth-mass planet in a time of COVID-19:KMT-2020-BLG-0414Lb

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Research in Astronomy and Astrophysics 2021年第9期21卷 243-261页

作者： Weicheng Zang Cheongho Han Iona Kondo Jennifer C.Yee Chung-Uk Lee Andrew Gould Shude Mao Leandro de Almeida Yossi Shvartzvald Xiangyu Zhang Michael D.Albrow Sun-Ju Chung Kyu-Ha Hwang Youn Kil Jung Yoon-Hyun Ryu In-Gu Shin Sang-Mok Cha Dong-Jin Kim Hyoun-Woo Kim Seung-Lee Kim Dong-Joo Lee Yongseok Lee Byeong-Gon Park Richard W.Pogge John Drummond thiam-Guan Tan JoséDias do Nascimento Júnior Dan Maoz Matthew T.Penny Wei Zhu Ian A.Bond Fumio Abe Richard Barry David P.Bennett Aparna Bhattacharya Martin Donachie Hirosane Fujii Akihiko Fukui Yuki Hirao Yoshitaka Itow Rintaro Kirikawa Naoki Koshimoto Man Cheung Alex Li Yutaka Matsubara Yasushi Muraki Shota Miyazaki Greg Olmschenk Clément Ranc Nicholas J.Rattenbury Yuki Satoh Hikaru Shoji Stela Ishitani Silva Takahiro Sumi Daisuke Suzuki Yuzuru Tanaka Paul J.Tristram Tsubasa Yamawaki Atsunori Yonehara Andreea Petric Todd Burdullis Pascal Fouqué Department of Astronomy Tsinghua UniversityBeijing 100084China Department of Physics Chungbuk National UniversityCheongju 28644Republic of Korea Department of Earth and Space Science Graduate School of ScienceOsaka UniversityToyonakaOsaka 560-0043Japan Center for Astrophysics j Harvard&Smithsonian 60 Garden St.CambridgeMA 02138USA Korea Astronomy and Space Science Institute Daejon 34055Republic of Korea University of Science and Technology Korea(UST)217 Gajeong-ro Yuseong-guDaejeon 34113Republic of Korea Max-Planck-Institute for Astronomy Königstuhl 1769117 HeidelbergGermany Department of Astronomy Ohio State University140 W.18th Ave.ColumbusOH 43210USA National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Universidade Federal do Rio Grande do Norte(UFRN) Departamento de F´1sica59078-970NatalRNBrazil Department of Particle Physics and Astrophysics Weizmann Institute of ScienceRehovot 76100Israel University of Canterbury Department of Physics and AstronomyPrivate Bag 4800Christchurch 8020New Zealand School of Space Research Kyung Hee UniversityYonginKyeonggi 17104Republic of Korea Possum Observatory PatutahiGisbourneNew Zealand Perth Exoplanet Survey Telescope PerthAustralia School of Physics and Astronomy Tel-Aviv UniversityTel-Aviv 6997801Israel Department of Physics and Astronomy Louisiana State UniversityBaton RougeLA 70803 USA Canadian Institute for Theoretical Astrophysics University of Toronto60 St George StreetTorontoON M5S 3H8Canada Institute of Natural and Mathematical Sciences Massey UniversityAuckland 0745New Zealand Institute for Space-Earth Environmental Research Nagoya UniversityNagoya 464-8601Japan Code 667 NASA Goddard Space Flight CenterGreenbeltMD 20771USA Department of Astronomy University of MarylandCollege ParkMD 20742USA Department of Physics University of AucklandPrivate Bag 92019AucklandNew Zealand Department of Earth and Planetary Science Graduate School of ScienceThe University of Tokyo7-3-1 Hongo

We report the discovery of KMT-2020-BLG-0414 Lb,with a planet-to-host mass ratio q2=0.9-1.2×10-5=3-4 q⊕at 1σ,which is the lowest mass-ratio microlensing planet to *** with two other recent discoveries(4?q/q⊕?6),it fills out the previous empty sector at the bottom of the triangular(log s,log q)diagram,where s is the planet-host separation in units of the angular Einstein radiusθ***,these discoveries call into question the existence,or at least the strength,of the break in the mass-ratio function that was previously suggested to account for the paucity of very low-q *** to the extreme magnification of the event,Amax~1450 for the underlying single-lens event,its light curve revealed a second companion with q3~0.05 and|log s3|~1,i.e.,a factor~10 closer to or farther from the host in *** measurements of the microlens parallaxπE and the angular Einstein radiusθE allow estimates of the host,planet and second companion masses,(M1,M2,M3)~(0.3 M⊙,1.0 M⊕,17 MJ),the planet and second companion projected separations,(a⊥,2,a⊥,3)~(1.5,0.15 or 15)au,and system distance DL~1 *** lens could account for most or all of the blended light(I~19.3)and so can be studied immediately with high-resolution photometric and spectroscopic observations that can further clarify the nature of the *** planet was found as part of a new program of high-cadence follow-up observations of high-magnification *** detection of this planet,despite the considerable difficulties imposed by COVID-19(two KMT sites and OGLE were shut down),illustrates the potential utility of this program.

关键词： gravitational lensing:micro

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转移性肾癌:动态对比增强CT对抗血管生成治疗的评价

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国际医学放射学杂志 2010年第5期 486-486页

作者： L.S.Fournier S.Oudard R.thiam L.Trinquart E.Banu J.Medioni 梁斌 Department of Radiology Assistance Publique-Hpitaux de ParisHpital Européen Georges Pompidou

关键词：抗血管生成病人动态对比增强灌注参数 CT

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妊娠期肺栓塞采用肺γ照像还是CT血管成像诊断?

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国际医学放射学杂志 2011年第2期 185-185页

作者： M.P.Revel S.Cohen O.Sanchez M.A.Collignon R.thiam A.Redheuil 唐光健 Departments of Radiology Pompidou HospitalUniversité Paris Descartes

目的评价妊娠期怀疑肺栓塞(PE)病人的肺γ照像与CT血管成像的阳性率、阴性率与不确定率结果以及初级医生与专家诊断的一致性。材料与方法研究获取学院评

关键词：血管成像病人肺栓塞妊娠期 CT

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应用MR血氧水平依赖(BOLD)成像在体评估宫内生长受限大鼠模型的胎盘和胎儿的氧合改变

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国际医学放射学杂志 2013年第4期 393-393页

作者： S. Aimot -Macron L.J. Salomon B. Deloison R. thiam C.A. Cuenod O. Clement 董龙春 INSERM U970 Paris Cardiovascular Research Center-PARCC56rueLeblanc75015ParisFrance

目的评价氧合过度所致的BOLD信号强度的改变是否与大鼠宫内生长受限(IUGR)有关。方法在妊娠第16天,结扎左侧子宫血管根部,建立妊娠大鼠的IUGR模型。在第19天,应用1.5TMR设备以平衡稳态自由进动(balanced-SSFP)序列对大鼠模型进行BOLDMR... 详细信息

目的评价氧合过度所致的BOLD信号强度的改变是否与大鼠宫内生长受限(IUGR)有关。方法在妊娠第16天,结扎左侧子宫血管根部,建立妊娠大鼠的IUGR模型。在第19天,应用1.5TMR设备以平衡稳态自由进动(balanced-SSFP)序列对大鼠模型进行BOLDMR成像。比较母体肝脏、对照组及生长受限胎儿胎盘单元(FPU)在氧合过度发生前后的信号强度(SI)。结果 18只大鼠中,母体氧合过度导致所有感兴趣区SI明显增加(P<0.05)。对照组中,胎盘(n=74)和胎儿(n=53)信号强度(平均值±SD)分别增加(21±15)%和(13±8.5)%。IUGR组中,信号强度增加的幅度明显较低:胎盘(n=36)为(6.5±4)%,胎儿(n=34)为(7±5.5)%;P<0.05。结论 BOLDMRI可以无创评估大鼠母体氧合过度所致的胎儿胎盘反应,并显示其在IUGR模型中的信号强度改变。这种成像技术可提供一种有用的辅助方法,用以早期诊断、评估和治疗人类IUGR。要点①宫内生长受限是围产期发病和死亡的重要原因。②BOLDMRI可以无创评估胎儿胎盘对母体氧合过度的反应。③IUGR大鼠的胎儿胎盘对母体氧合过度的反应发生改变。④功能MRI有助于评估人IUGR。

关键词：胎儿胎盘 BOLDMRI 宫内生长受限(IUGR) 胎儿胎盘氧合作用

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应用4.7T血氧水平依赖MRI评估胎儿宫内生长受限大鼠模型的胎儿胎盘的氧合作用

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国际医学放射学杂志 2013年第6期 583-583页

作者： G.E.Chalouhi M.Alison B.Deloison R.thiam G.Autret D.Balvay 徐国萍 Department of Obstetrics and Fetal Medicine Paris Descartes University Assistance Publique-Hpitaux de Paris Hpital Necker-Enfants-Malades 149 rue de SèvresParis 75015 France

摘要目的以血氧水平依赖(BOLD)MR成像作为一种无创性工具研究胎儿宫内生长受限(IUGR)大鼠模型,以评估胎儿胎盘单位(FPU)的氧合反应。材料与方法研究经动

关键词：胎儿宫内生长受限氧合胎儿胎盘大鼠模型血氧

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