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High Field MRI in Human African Trypanosomiasis (HAT)

Open Journal of Radiology 2017年第3期7卷 190-198页

作者： Cherif Mohamadou Aidara Caroline Magne Philomene Kouna Gaelle Ebinda Mipinda abdoulaye Dione diop abdoulaye ndoye diop Sokhna Ba Radiology Office of Fann University Hospital Dakar-Fann Sénégal Internal Medecine Office of Polyclinique El Rapha Trois Quartiers Libreville Gabon Radiology Office of Polyclinique El Rapha Trois Quartiers Libreville Gabon

Human African Trypanosomiasis (HAT) or sleeping thickness is a forest and rural disease;where agriculture is the main activity. It is a chronic and lethal disease without treatment. HAT is caused by two parasites;Trypanosoma Brucei Gambiense (gTB) and Trypanosoma Brucei Rhodesiense (rTB) transmitted to humans by the tsetse fly. It is endemic condition in Africa between the 15° north latitude and the 20° south latitude. It is reported outside this area in travelers who stayed in endemic zone. Infection by gTB is wider and more frequent (98%) than that by rTB (2%). The Democratic Republic of Congo is the most affected country with more than 75% of reported cases. The geographical distribution is not homogeneous. There are more affected regions in a zone called “foci” which represents areas favorable to the development of the vector. Its diagnosis and treatment are very important because of its social and economic impact at both the individual and community levels. Promising molecules including fexinidazole are currently undergoing testing. Nowadays populations move more and more easily but the discovery of this disease in daily neuroradiological practice is exceptional. We propose in this paper through two observations, reminders on epidemiological, clinical and MRI features of HAT. It typically performs the edematous, bilateral and diffuse encephalitis. It is important to distinguish these aspects from the arsenic-induced encephalitis that may occur during treatment. Only vector control allows eradicating this disease. WHO has set targets elimination of HAT as a public health problem for 2020 deadline.

关键词： Human African Trypanosomiasis High Field MRI Diffuse Encephalitis Optic Tract Arsenic-Induced Encephalitis

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Assessment of a Database Management System in a Mammogram Unit of a Radiologic Department in Fann Teaching Hospital (Senegal)

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International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2017年第4期6卷 401-409页

作者： Mamour Gueye Awa Sadikh Badiane Sokhna Ba diop Mamadou Ly Mame Diarra Ndiaye Gueye abdoulaye Dione diop abdoulaye ndoye diop Marame Fall Gynecologic and Obstetric Clinic Aristide Le Dantec Teaching Hospital Dakar Senegal Department or Radiology Fann Teaching Hospital Dakar Senegal

Objectives: To evaluate a medical data management system of a mammogram unit in a department of Radiology. Methods: This is a qualitative and quantitative assessment study in Fann Teaching Hospital between April 2014 and June 2015 one year after its implementation. The quantitative component consisted of the audit of the database to determine the socio-demographic characteristics of patients and the results of mammograms. The qualitative component assessed users’ experience. For analysis, quantitative data were extracted and transferred to Microsoft Excel. For scale variables, we calculated the averages and extremes. For qualitative variables, we established percentages. Results: During the study period, 433 patients underwent mammograms. The average age of patients was 48 years. The completion rate maintained above 85% was below 26% in the first two months of use. As to the completeness given examinations, it was still above 83%. The results of mammogram examinations were normal in the majority of cases: 96% for the right breast and 95.2% for the left breast. All users had a favourable opinion about the database. The reasons were better work organization, comprehensiveness, accessibility and standardization of information about the patient and especially the immediate availability of statistics. For 60% of these health professionals, complaints related to the use of the software were the time-consuming of filling data. Conclusion: This study mainly describes the perception of health professionals on the computerization of radiological examinations. It offers some advantages, proposes improvements and opens avenues for reflection on the globalization of the computerization of patient records in Radiology.

关键词： Electronic Medical Records Database Mammogram Radiology Dakar

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High-Field MRI Contribution in Tolosa-Hunt Syndrome (THS). Report of Two Cases and Review of Literature

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Open Journal of Radiology 2018年第3期8卷 141-149页

作者： Chérif Mohamadou Aidara Philomène Kouna Jennifer Nyangui Mapaga Nfally Badji Hamidou Deme abdoulaye Dione diop abdoulaye ndoye diop Sokhna Ba El Hadj Niang Radiology Department Fann University Hospital Dakar Sénégal Neurology Department El Rapha Polyclinic Trois Quartiers BP 256 Libreville Gabon

Background: Tolosa Hunt Syndrome is an inflammatory condition of unknown etiology of the cavernous sinus and superior orbital fissure. Because of the difficulty in establishing histological evidence, his diagnosis is based on a set of arguments established by the International Headache Society. MRI allows indirect visualization of the granuloma and plays a key role in diagnosis and follow-up. Aim: To illustrate High-field MRI contribution in Tolosa-Hunt Syndrome (THS). Cases Presentation: Two patients, a 25-year-old female and a 40-year-old male were recruited in this retrospective case report study at the Radiology service of Fann University Hospital (Dakar Senegal). The first patient has been suffering from a right retro-orbital pain and diplopia for 2 months and the second from a painful oculomotor nerve palsy for 3 months. Blood tests, lumbar puncture, thyroid hormone levels and an infectious screen were done. Screening for converting enzymes, and serum antibodies were also done. They underwent a high field MRI (Siemens 1.5T) with T1, T2, FLAIR, T2*, diffusion B1000, TOF polygon, CISS 3D and T1 gadolinium sequences in the 3 planes space. No significant abnormality was detected in blood tests or CSF analysis. Screening for converting enzymes and serum antibodies screen were also negative. For each patient, MRI examinations showed a non tumoral thickening of the right cavernous sinus, suggesting a granulomatous involvement. Tolosa Hunt Syndrome was evoked firstly. They were put on corticotherapy at high doses with a spectacular regression of symptoms. The Criteria of the International Headache Society of THS were met in both patients. Conclusion: High-field MRI is a significant diagnostic tool in the assessment of painful ophthalmoplegia. It allows a direct visualization of the granuloma of the cavernous sinus and assesses its course throughout the disease.

关键词： Painful Ophthalmoplegia Tolosa-Hunt Syndrome Criterias of International Headache Society High-Field MRI

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MRI Signal Abnormalities of the Optic Tracts, a Marker of Meningoencephalitis Caused by Trypanosoma Gambiense (TG)—A Delayed Patho-Radlological Correlation

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Open Journal of Radiology 2022年第1期12卷 1-7页

作者： Cherif Mohamadou Aidara Caroline Magne Nfally Badji Lera Geraud Akpo Gaelle Ebinda Mipinda Hamidou Deme Philomène Kouna abdoulaye Dione diop abdoulaye ndoye diop Sokhna Ba Elhadj Niang Radiology Office of “De la Paix University Hospital” Ziguinchor Senegal Internal Medicine Office of Polyclinique El Rapha Libreville Gabon Radiology Office of Aristide Le Dantec University Hospital Dakar Senegal Radiology Office of Polyclinique El Rapha Libreville Gabon Radiology Office of Fann University Hospital Dakar Senegal

Parasitic meningoencephalitis presents several etiologies which sometimes depend on their geographical location. They require thorough blood and cerebrospinal fluid check-up for directing an efficient treatment. Clinicians and radiologists are constantly looking for specific signs that could point to a particular etiology. The meningoencephalitis caused by Human African Trypanosomiasis (HAT) due to Trypanosoma brucei gambiense (TG) is a rare disease characterized by a slow progression, over years sometimes. Its non-specific presentation either clinically or in imaging can lead to misdiagnosis and thus, delay the treatment. However, involvement of the optic tracts seems to be characteristic of this condition, on old data from animal experimentation and recent high-field MRI data. MRI is the best current technique to explore the brain, cranial nerves, and visual pathways. In this article, we are going to present two observations of meningoencephalitis caused by HAT and then discuss some specific aspects of this neglected and re-emerging disease.

关键词： Human African Trypanosomiasis Trypanosoma Brucei Gambiense Diffuse Meningo-Encephalitis Optic Tract Evolvement

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Impact of Multifidus Muscle Morphometry on the Clinical Evolution of Chronic Low Back Pain

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Forensic Medicine and Anatomy Research 2023年第1期11卷 1-13页

作者： Ndèye Bigué Mar Aïnina Ndiaye abdoulaye ndoye diop Gor Side Diagne Babacar Diao Souleymane Diao Racky Wade Issa Dior Seck Karim Yacouba Garba Sokhna Astou Gawane Thiam Mamadou Ndiaye Magaye Gaye Magatte Gaye Sakho Jean Marc Ndiaga ndoye Mamadou diop Assane Ndiaye abdoulaye Ndiaye Anatomy Laboratory/Joint Research and Diagnosis Unit Iba Der THIAM University of Thiès Thiès Senegal Laboratory and Organogen of Anatomy Cheikh Anta Diop University of Dakar Dakar Senegal Department of Radiology and Medical Imaging Gaston Berger University of Saint Louis Dakar Senegal Neurology Department Fann Hospital in Dakar Dakar Senegal Urology Service Ouakam Military Hospital Dakar Senegal Orthopedic Traumatology Service Idrissa Pouye Hospital of Grand Yoff-Dakar Dakar Senegal Neurosurgery Department Idrissa Pouye Hospital of Grand Yoff Dakar Senegal Anatomy Laboratory Assane Seck University of Ziguinchor Ziguinchor Senegal

Purpose: The multifidus muscle is an important extensor muscle of the lumbar spine. It plays a major role in the stability and realization of axial rotation movements of the thoraco-lumbar spine. Its atrophy by fatty degeneration would be at the origin of the occurrence of chronic low back pain which constitutes a public health problem in Senegal. Taking into account its anatomy is essential for the etiopathogenic analysis and the treatment of low back pain. The purpose of our work was to investigate the impact of multifidus muscle morphometry on the anatomy-clinical evolution of low back pain. Material and method: this was a prospective study over a period of 30 months from November 2019 to May 2022. It involved 100 patients seen in the neurology department of Fann Hospital for chronic low back pain and who had already had a scanner falling within the criteria for low back pain. We used 3D Slicer, SPSS 20, Excel 2016 software to model and analyze the morphometric data of the multifidus muscle after physiotherapy and control lumbar scans. Results: The sex ratio was 2.23. The average age of the patients was 45 ± 7 years. On the initial CT scan, according to the Hadar classification, we noted a predominance of grade 2 with 56% in L5/S1, followed by grade 1 with 32% and grade 3 with 14%. In L4/L5, the majority of patients, 67%, had grade 1. A conflicting circumferential disc bulge with the roots predominating in L5/S1 was present in 94% of men (p-value = 0.02). Before physiotherapy, the average volume of the multifidus was 193 mm3 ± 39, after physiotherapy it was 203 mm3 ± 42 with a progression rate of 5.2%. Clinically, severe type pain had regressed from 86% before physiotherapy to 0% after physiotherapy (p-value = 0.03). Conclusion: Taking into account the morphometry of the multifidus is an essential element in the management of chronic low back pain.

关键词： Morphometry Multifidus Low Back Pain Physiotherapy

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CT Scans and Delays in Diagnosis of Stroke in Senegal’s Regional Hospitals: A Multicenter Study of 655 Cases

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Open Journal of Medical Imaging 2020年第2期10卷 96-104页

作者： Hamidou Deme Nfally Badji Léra Géraud Akpo Oumou Dieng abdoulaye Dione diop Fallou Galass Niang Mouhamadou Hamine Toure Ibrahima Faye Malick Diouf Aicha Ndichout Marie Mbengue Cherif Mohamadou Aidara Mamadou Ly Ousmane Sano Ndiaga Matar Gaye Ousmane Cissé abdoulaye ndoye diop Aissata Ly Ba Sokhna Ba diop El Hadj Niang Radiology Department of the Aristide Le Dantec Hospital in Dakar Dakar Senegal Radiology Department of the CHNU de Fann in Dakar Dakar Senegal Neurology Department of the Fann University Hospital in Dakar Dakar Senegal Radiology Department of the Albert Royer Children’s Hospital of Fann in Dakar Dakar Senegal

Stroke represents the 2nd cause of mortality and 1st cause of physical disability in the adult population. In Senegal, it represents 30% of hospitalization and 2/3 of the mortality in the department of neurology in the capital city, Dakar. Objective: To specify the types of stroke and to evaluate diagnostic delays in Senegal’s regional hospitals. Materials and Methods: This was a retrospective, cross-sectional, descriptive, multicentric study for 4 years (from 2014 to 2017) including any patient presenting a clinical suspicion with a CT scan confirmation of stroke in one of the 9 regional hospitals in Senegal with a recruitment period of 6 months per hospital. CT scans were performed with a 16 slices machine in 6 hospitals, 4 slices in 2 hospitals and 2 slices in 1 hospital. We studied the types and location of strokes, the associated signs and the time from stroke onset to admission and the time from admission to CT scan. Results: 655 patients were retained including 322 men and 333 women for an M/F ratio of 0.96. The average age was 63 years (range: 7 years, 112 years). High blood pressure was noted in 59.2% of patients and diabetes in 10.7% of patients. Strokes were ischemic in 76% of cases involving the middle cerebral artery in 73% of cases and hemorrhagic in 24%, of which 80.7% were deep localized. A mass effect was noted in 7.5% of cases, an engagement in 6.9% of cases and ventricular hemorrhage in 2.7% of cases. The delay between the onset of the deficit and admission was less than 6 hours in 10.6% of patients. The time between the onset of stroke and admission to hospital was specified in 416 patients (63.5%) of the study population, it was less than 6 hours in 10.6% of patients, between 6 hours and 24 hours for 29.3% and more than 24 hours for 60.1%. Between admission and the CT scan, the time was precise in 459 patients (70%), it was less than 6 hours in 37.9%, between 6 hours and 24 hours in 43.6 % and more than

关键词： Stroke CT Scans Diagnostic Delays

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Management and Control of a DC Bus Powered by Renewable Energies

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Journal of Applied Mathematics and Physics 2021年第7期9卷 1652-1672页

作者： Mouhamadou Moustapha diop Ibrahima Gueye abdoulaye Kebé Moustapha diop ENSETP Dakar Senegal Cheik Anta diop University of Dakar (UCAD) Dakar Senegal

This article proposes a method of management and control of a continuous bus powered by renewable energies for autonomous applications. The DC bus is obtained from two systems of renewable sources (the solar system and the wind system) and storage battery (Lithium Ion). The continuous bus control and management procedure require efficiency in the control of the charge and discharge of the battery according to the load energy demand (DC Motor). The battery charging process is non-linear, varying over time with considerable delay, so it is difficult to achieve the best performance on control with energy management using traditional control approaches. A fuzzy control strategy is used in this article for battery control. To improve battery life, fuzzy control manages the desired state of charge (SOC). The entire system designed is modeled and simulated on MATLAB/Simulink Environment.

关键词： DC Bus Battery Lithium Ion Control and Management Lifetime SOC Fuzzy Logic DC Motor

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Giant Cerebriform Nevus Cell Nevus of the Scalp: A Case Report

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Open Journal of Modern Neurosurgery 2024年第1期14卷 8-13页

作者： Mohamed El Hassimi Cissé N’daraw ndoye Anne Aurore Sankale Pauline Diousse abdoulaye diop Alvine Nah Doe Sagar diop Momar Codé Ba Seydou Boubakar Badiane Neurosurgery Department of CHU Mère-Enfant “Le Luxembourg” Bamako Mali Neurosurgery Department of CHNU de Fann Dakar Sénégal Plastic and Cosmetic Surgery Department of CHU Le Dantec Dakar Sénégal Dermatology Department of Thiès Regional Hospital Thiès Sénégal

Giant cerebriform nevus cell nevus of the scalp is an extremely rare form of congenital melanocytic nevus. Giant cerebriform nevus of the scalp has a major psychosocial impact because of its unsightly appearance with fetid maceration. We report the case of a 35-year-old woman who had a painless, malodorous swelling of the cerebriform scalp measuring 20 × 17 cm in diameter with a wide base of insertion at the occipital level adhering to the deep planes. The excision associated with a skin plasty was carried out. Histology concluded that there was a giant cerebriform naevo-cellular nevus of the scalp.

关键词： Giant Nevus Tumor of the Scalp Resection

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Experimental Characterization of Shape of an Aggregate by a Numerical Value—Application to Senegalese Basaltic Aggregates for Rail Transport

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Open Journal of Civil Engineering 2020年第2期10卷 131-142页

作者： abdoulaye Diedhiou Libasse Sow Ndeye Mareme diop Civil Engineering Department Higher Polytechnic School Cheikh Anta Diop University of Dakar Dakar Senegal

This article first talks about railways in general and ballast in particular. An inventory is then made on the modernization of the Senegalese ballast railways. In the second phase, an experimental work of characterization of basaltic aggregates of Diack (Locality of Ngoundiane, Thiès region, Senegal) is presented. The grain size studied is 25/50 mm as for any material studied for use as railway ballast. Experimental work presented consists of the characterization of the shape of an aggregate using the NF P 18-301 standard. The test consists of comparing the volume of the aggregate to that of an equivalent sphere with the largest diameter of the aggregate, by calculating the average volume coefficient. With a Representative Elementary Volume (REV) of 6 aggregates, the volume coefficient “Cv” fluctuates between 0.27 and 0.49 with an average volume coefficient of 0.39 which is well above 0.15. The grains studied are polyhedral and therefore have a high mechanical resistance.

关键词： Ballast Rail Transport Basalt Shape Volume Coefficient

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Spatial and Temporal Distribution of Rainfall Breaks in Senegal

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American Journal of Climate Change 2021年第4期10卷 533-560页

作者： Bara Ndiaye Mahamat Adoum Moussa Malick Wade abdoulaye Sy abdoulaye Bouya diop Aichetou Dia diop Bouya diop Aboubakary Diakhaby Laboratoire des Sciences de l’Atmosphère et de Océans Matériaux énergie Dispositifs (LSAOMED) Saint-Louis Senegal

This study analyzes the spatio-temporal distribution of daily rainfall data from 13 stations in the country of Senegal located in the North-West of Africa. These data, covering the period 1950-2010, are extracted from the database of the Regional Study Center for the Improvement of Drought Adaptation (CERAAS). They allow to calculate, in each station, dry episodes and their sequences and the results reveal a latitudinal variability of class 1 breaks (1 - 3 days) with the highest values recorded in the south. Unlike the class 2 episodes (greater or equal than 15 days), the latitudinal gradient is less pronounced but they are more frequent in the north. For most of the regions studied, a break in the trend towards an increase in dry sequences can be noted, most often at the beginning of the 1970s, which coincides with the start of the great drought of the 1970s decade. For all sites, the frequency of dry episodes of class 1 (1 - 3 days) exceeds 70%. The frequency of class 2 of dry episodes (greater or equal than 15 days) decreased from 30% in 1951-1970 to 18% in 1991-2010 in the region of Thiès;from 25% in 1951-1970 to 20% in 1991-2010 in Louga;from 22% in 1951-1970 to 18% in 1991-2010 in Tamba;23% in 1951-1970 to 15% in 1991-2010 in Ziguinchor;25% in 1951-1970 to 16% in 1991-2010 in Kolda;22% in 1951-1970 to 18% in 1991-2010 in Diourbel and finally 20% in 1951-1970 to 17% in 1991-2010 in Fatick. Over the whole period of study, the spatial distribution of the number of dry periods in class 1 is higher in the South than in the Center and in the North of Senegal. For class 2 breaks, the latitudinal gradient is less pronounced and the minimum number of dry periods in this class is recorded in the south, especially in Ziguinchor. However, the maximum is observed in the Center. In the Northern region (Saint-Louis), classes 3 and 4 are much more frequent. This spatial variability of rainfall breaks is clearly associated with the rainfall gradient between the North and the S

关键词： Rainfall Rainfall Breaks Great Drought Senegal Consecutive Dry Days

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