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Impact of the COVID-19 Pandemic on Patient Attendance and Trends in the Use of Medical Imaging Modalities in a Referral Hospital in the City of Douala, Cameroon

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Open Journal of Medical Imaging 2022年第1期12卷 16-24页

作者： Yannick Onana joshua tambe Mohamadou Aminou Samuel Mbozo’o Mvondo Francis Ateba Ndongo Jean Claude Mballa Amougou Jeremie Mbo Amvene Mathurin Neossi Guena Harvey Onana Boniface Moifo Emile Telesphore Mboudou Douala Gyneco-Obstetric and Pediatric Hospital Douala Cameroon Faculty of Medicine and Biomedical Sciences of Garoua University of Ngaoundere Garoua Cameroon Faculty of Health Sciences University of Buea Buea Cameroon Faculty of Medicine and Pharmaceutical Sciences University of Douala Douala Cameroon Faculty of Sciences University of Ngaoundere Ngaoundere Cameroon Faculty of Medicine and Biomedical Sciences The University of Yaoundé 1 Yaoundé Cameroon

Introduction: The COVID-19 pandemic has led to a massive influx of patients with suspected or confirmed flu to hospitals, paradoxically leading to a decrease in the attendance for some services. This study aspired to assess the impact of the COVID-19 pandemic on the attendance of patients at the Radiology and Medical Imaging Department of a tertiary hospital in Douala, Cameroon. Materials and Methods: This was an observational, retrospective and descriptive hospital-based study. Data on patient attendance was extracted from the medical records at the Radiology Unit of Douala Gyneco-Obstetric and Pediatric Hospital (DGOPH) between the 1st of March 2019 and the 30th of August 2021. Results: There was a drop in the number of sonographies and conventional radiographies by 25.73% and 18.26% respectively during the peaks pandemic period of 2020 compared to the preceding pre-pandemic era (2019). There was a recovery in 2021 as the numbers increased. Computed tomography studies increased by 40.65% during the peak pandemic period of 2020. Conclusion: This study enables us to understand the health-seeking behavior during the COVID-19 pandemic. The increase in CT utilization during the peak period of the pandemic nevertheless required caution in order to ensure safety and to promote rational cost-effective utilization.

关键词： COVID-19 Impact Imaging Trends Radiology Department Douala

Reliability of Thyroid Imaging Reporting and Data System(TIRADS)Classification in Differentiating Benign from Malignant Thyroid Nodules

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Open Journal of Radiology 2013年第3期3卷 103-107页

作者： Boniface Moifo Emmanuel Oben Takoeta joshua tambe Francois Blanc Joseph Gonsu Fotsin Department of Radiology and Radiation Oncology Faculty of Medicine and Biomedical SciencesThe University of Yaounde IYaoundeCameroon Centre Hospitalier de Lagny Marne La ValleeFrance

Background: Ultrasonography (US) is the best diagnostic tool in the initial assessment of thyroid nodule. Giving its appropriateness and accessibility, ultrasound-based thyroid imaging reporting and data systems (TIRADS) classifications have been developed with main goal to standardize reporting and facilitate communication between practitioners, and to indicate when fine-needle aspiration biopsy (FNAB) should be performed. Objective: To determine the reliability of Russ’ modified TIRADS classification in predicting thyroid malignancy. Materials and Methods: It was a cross sectional study carried out at Centre Hospitalier de Lagny, Marne La Vallée (France). Consecutive records of patients with focal thyroid nodules on ultrasound (US) for which US-guided FNAB was performed and pathology results were available, from January 2007 to August 2012, were selected for review. The risk of malignancy of each TIRADS category was determined and correlation with pathology assessed. Statistical performances of some US features were also assessed. The threshold for statistical significance was set at 0.05. Results: A total of 430 records of patients were eligible. Twenty-three out of 430 (5.3%) nodules were malignant. The risk of malignancy of the TIRADS categories were as follows: TIRADS2 0%, TIRADS3 2.2%, TIRADS4A 5.9%, TIRADS4B 57.9%, TIRADS5 100% (Gamma statistic = 0.85;Spearman correlation = 0.30, Pearson’s R = 0.37, p Conclusion: Russ’ modified TIRADS classification is reliable in predicting thyroid malignancy. More evidence is nevertheless necessary for widespread adoption and use.

关键词： TIRADS Thyroid Nodule Thyroid Cancer Ultrasonography Fine-Needle Biopsy

Referring Physicians’ Knowledge on Justification of Medical Exposure in Diagnostic Imaging in a Sub-Saharan African Country, Cameroon

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Open Journal of Radiology 2014年第1期4卷 60-68页

作者： Boniface Moifo Annick Laure Edzimbi Haoua Tebere joshua tambe Richard Ndi Samba Joseph Gonsu Fotsin Department of Radiology and Radiation Oncology Faculty of Medicine and Biomedical Sciences The University of Yaoundé I Yaoundé Cameroon Department of Radiology and Radiation Oncology Faculty of Medicine and Biomedical Sciences The University of Yaoundé I Yaoundé Cameroon Radiology Department Yaounde Gynaeco-Obstetric and Pediatric Hospital Yaounde Cameroon National Radiation Protection Agency Yaounde Cameroon

Background: Justification is the process of weighing the potential benefit of the exposure against potential detriment for that individual. Its role has been largely delegated to imaging professionals. Nevertheless, justification process involves referring physicians, radiographers and radiologists. Objective: To assess the knowledge of referring physicians regarding justification of irradiating examinations in medical imaging at the university-affiliated hospitals in Yaoundé Cameroon. Materials and Methods: A questionnaire (18 questions) based on the French guide for the proper use of medical imaging tests in relation to the justification of irradiating examinations, was self-administered to 151 referring physicians in Yaounde (Cameroon) between October 2012 and January 2013. The pre-tested questionnaire was completed in the presence of the investigator. A scoring system was then adopted with a total of 15 points from the level of knowledge on justification which could be classified as satisfactory or not. Results: Referring physicians were 75 (49.7%) GPs, 53 (35.1%) residents and 23 (15.2%) specialists. Knowledge on justification was unsatisfactory for 79.5% of referring physicians with no significant difference in terms of professional experience (p = 0.95) or specialty (p = 0.119). The concepts of “useful exam” and “justified exam” were not known by 113 (74.8%) and 95 (62.9%) practitioners. MRI was selected as irradiating by 62 (41.1%), SPECT and PET-scan as non-radiating examinations by 98 (64.9%) and 115 (76.1%) participants. The main reasons for repeating a giving radiology exam were: unsatisfactory interpretation, unknown of where it was performing and poor quality exam respectively for 23 (15.2%), 37 (24.5%) and 43 (28.5%) referring physicians. Justification was the responsibility of the referring physician alone for 57% of respondent. Only 11 clinicians knew the reference of “Justification-Optimization-Limitation” to radiation protection. Conclusion: The k

关键词： Assessment Justification Referring Physician Radiation Protection Best Practices Cameroon

Routine prenatal ultrasonography: The pregnant woman’s expectations and perspectives on safety in a Central African obstetric population

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Open Journal of Obstetrics and Gynecology 2013年第7期3卷 573-576页

作者： joshua tambe Boniface Moifo Odile Fernande Zeh Pascal Foumane Joseph Gonsu Fotsin Robinson Enow Mbu Obstetrics and Gynecology Department Faculty of Medicine and Biomedical Sciences The University of Yaounde 1 Yaounde Cameroon Obstetrics and Gynecology Department Gyneco-Obstetric and Pediatric Hospital Yaounde Cameroon Radiology Department Gyneco-Obstetric and Pediatric Hospital Yaounde Cameroon

Background: Pregnant women are important stakeholders regarding prenatal ultrasound (US) scanning. Their specific needs and preferences have to be ascertained by healthcare providers to ameliorate service delivery. Objective: To assess the pregnant woman’s expectations during routine prenatal US scan and her perspective ofUSsafety during pregnancy in a Central African obstetric population. Methods: A cross-sectional descriptive survey of consenting pregnant women who reported for routine prenatal US scan using an anonymous questionnaire. A convenient sample of 200 participants was adopted. Results: Thirty-three (16.8%) respondents (on a total of 196) declared they had never done anUSscan. One hundred and eleven (58.4%) on a total of 190 stated that they had not received any information on what ultrasonography is all about. Before theUSscan the respondents would like to receive information on the aim or purpose of ultrasonography, possible inconveniences or risks, and on how to prepare before the scan. The most reported expectations were assurance of the wellbeing of the fetus (58%), gender determination (44.5%) and information on fetal position (20.5%). Thirty-four respondents considered ultrasonography as not perfectly safe for the mother or the “baby”, with the relevant reasons being the use or production of some potentially harmful “rays”. Conclusion: Pregnant women would want to be assured of the wellbeing of the fetus, the gender and position during routine prenatal US. They however need to be informed of its purpose and safety.

关键词： Routine Prenatal US Expectations US Safety

Extraspinal Incidental Findings at Lumbar Spine Magnetic Resonance Imaging in Two Hospitals:Prevalence and Clinical Importance

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Open Journal of Radiology 2017年第4期7卷 241-248页

作者： Odile Fernande Zeh Emilienne Guegang Goujou Armel Philippe Awana Julienne Onguene Medza joshua tambe Claude Sandra Raissa Abomo Ngodo Maxwell Goudjou Sandjong Joseph Gonsu Fotsin Faculty of Medicine and Biomedical Sciences University of Yaounde IYaoundeCameroon Yaounde Gynaecology Obstetrics and Pediatrics Hospital YaoundeCameroon Jordan Medical Center YaoundeCameroon Yaounde General Hospital YaoundeCameroon Yaounde Jamot Hospital YaoundeCameroon Jacques Monod Hospital Le Havre MontivilliersFrance

Objective: To assess the importance of incidental extraspinal findings on Magnetic Resonance Imaging of the lumbar spine in two hospital facilities. Materials and Methods: It was a descriptive and retrospective study from November 2015 to March 2016. The records of patients who had done a Magnetic Resonance Imaging (MRI) scan of the lumbar spine were re-read in search of incidental findings. The incidental findings found were classified using Colonography Reporting and Data System(C-RADS) classification of extracolonic lesions to assess clinical significance. The prevalence of incidental findings was calculated for each facility, as well as the distribution according to age, the organs involved and the clinical importance. A non-detection rate was calculated by confronting the findings of the study with the original reports. Results: The prevalence of incidental findings was respectively 33% (19 out of 36) in Jordan Medical Center (JMC) in Yaounde and 27.74% (106 out of 292) in Jacques Monod Hospital. The extraspinal incidental findings were classified mainly as extracolonic 2 (E2): 58% in each facility. The percentage detection of incidental findings was 5% at JMS and 1.7% at Jacques Monod Hospital. Conclusion: Extraspinal incidental findings are frequent in both hospitals. However, the rate of detection remains very low.

关键词： Incidental Findings Magnetic Resonance Imaging Lumbar Spine Extraspinal Lesions

Comparison of Chest Computed Tomography Findings between Pregnant and Non-Pregnant Women with COVID-19 Infection in Douala Gyneco-Obstetric and Pediatric Hospital, Cameroon

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Open Journal of Medical Imaging 2021年第4期11卷 132-144页

作者： Yannick Onana joshua tambe Adamou Dodo Balkissou Mohamadou Aminou Samuel Mbozo’o Mvondo Dominique Tamchom Djomo Alphonse Nyong Ngalame Rakya Inna Bilkissou Moustapha Francis Ateba Ndongo Robert Tchounzou Jean Claude Mballa Amougou Jérémie Mbo Amvene Mathurin Neossi Guena Emile Telesphore Mboudou Douala Gyneco-Obstetric and Pediatric Hospital Douala Cameroon Faculty of Medicine and Biomedical Sciences of Garoua University of Ngaoundere Garoua Cameroon Faculty of Health Sciences University of Buea Buea Cameroon Faculty of Medicine and Pharmaceutical Sciences University of Douala Douala Cameroon Faculty of Sciences University of Ngaoundere Ngaoundere Cameroon Faculty of Medicine and Biomedical Sciences University of Yaoundé 1 Yaoundé Cameroon

Introduction: Pregnancy is a physiologic state associated with decreased immunity, and the use of medical imaging modalities with ionizing radiation must be justified as potential benefits must outweigh the risk of any harm. However, in the wake of SARS-CoV-2 virus pandemic, chest computed tomography (CT) is necessary to assess the severity of the disease. The objective of this study was to compare the chest CT findings of pregnant and non-pregnant women with SARS-CoV-2 viral pneumonia at a tertiary hospital setting. Materials and Methods: This was a cross-sectional, retrospective, descriptive study of admission records of pregnant and non-pregnant patients aged 15 - 49 years during a three (3) months period (April-July 2020) in DGOPH. Logistic regression was used to search for predictors of lung involvement during COVID-19. Results: A total of 31 patient files were studied of which 9 (29%) were those of pregnant women. The pregnant women mostly had a combination of lung ground-glass opacities and consolidation on CT compared to the non-pregnant women (7 out of 9 cases, 77.8%, vs. 6 out of 22 cases, 22.7%;p = 0.01). The group of pregnant women had more than 3 affected lobes (50.0% vs. 22.7%, p = 0.04) with a middle lobe predilection (77.8% vs. 31.8%, p = 0.02). CT predictors of COVID-19 pneumonia in the group of pregnant women after the multivariable logistic regression analysis were the presence of nodules (aOR = 13.9;95% CI: 1.25 - 134.2;p = 0.032) and linear bands of interlobular septal thickening (aOR = 17.8;95% CI: 1.46 - 217.6;p = 0.024). Conclusion: In this study, the chest CT of pregnant women with COVID-19 pneumonia revealed mostly a combination of findings compared to non-pregnant women, with more affected lobes. These findings suggest the likelihood of a greater CT severity of COVID-19 pneumonia among pregnant women and therefore the need for timely and appropriate management.

关键词： COVID-19 Pneumonia Pregnancy Computed Tomography