Diagnostic equipment can contribute significantly to production and quality.Maintenance budget however is limited so that having a systematic method for allocating part ofit to diagnostic equipment is of great potenti...Diagnostic equipment can contribute significantly to production and quality.Maintenance budget however is limited so that having a systematic method for allocating part ofit to diagnostic equipment is of great potential value. In this paper, a deterministic dynamicprogramming model for assisting in determining the optimum policy for investment in diagnosticequipment for multistage production systems is developed. The optimum pelticy is determined interms of the amount of equipment used at each stage of production and yields the maximumreturn for the entire system.展开更多
Background: Nosocomial infections have become a major challenge in healthcare facilities as they affect the quality of medical care. Radiological imaging plays a crucial role in medical diagnosis. However, the equipme...Background: Nosocomial infections have become a major challenge in healthcare facilities as they affect the quality of medical care. Radiological imaging plays a crucial role in medical diagnosis. However, the equipment and accessories used increase the risk of transmission of nosocomial bacteria. Objective: This study aims to reveal the extent and nature of microbiological contamination in four hospital diagnostic imaging departments to determine their potential role in the spread of nosocomial bacteria and to evaluate the effectiveness of routine daily disinfection practices in controlling microorganisms in diagnostic imaging departments. Methods & Results: In each department, swabs were taken from the surfaces of selected parts of the equipment and accessories three times a day (early morning, noon, and evening) for five consecutive days. Bacteria were isolated from 65 swabs (36.1% of all samples). The bacteria were isolated 3 times (4.6%) in the morning, 16 times (24.6%) at midday, and 46 times (70.7%) in the evening. The bacteria isolated were Escherichia coli (isolated 34 times;52.3%), Staphylococcus aureus (20 times;30.8%), Staphylococcus epidermidis (6 times;9.3%), and Klebsiella species (5 times;7.7%). Discussion & Conclusion: Findings demonstrated that radiology equipment and accessories are not free of bacteria and further improvements in the sterilization and disinfection of radiology equipment and accessories are needed to protect staff and patients from nosocomial infections.展开更多
Medical diagnostic tables are widely used inthemedical diagnostic equipment. For multifarious diagnostic needs, the medical diagnostic table works in various operating modes. In order to ensure patient safety, safety ...Medical diagnostic tables are widely used inthemedical diagnostic equipment. For multifarious diagnostic needs, the medical diagnostic table works in various operating modes. In order to ensure patient safety, safety factor of medical diagnostic table must meet safety requirement. The paper puts forward a method to find relations between key parameters and stress of table, identify maximum stress modes, reduce modes number of load test, and remove conservative high stress areas from finite element analysis result, by synthesizingthestress result of finite element analysis and measurement data for various operating modes of medical diagnostic table. It will help shorten test time, avoid over strength design, and reduce table’s cost. An application example of the method is presented by evaluating a specific CT medical diagnostictable. This method can be a reference for safety evaluation of all medical diagnostic tables.展开更多
The most important elements of “intellectual networks” (Smart Grid) are the systems of monitoring the parameters of electrical equipment. Information-measuring systems (IMS), which described in this paper, were prop...The most important elements of “intellectual networks” (Smart Grid) are the systems of monitoring the parameters of electrical equipment. Information-measuring systems (IMS), which described in this paper, were proposed to use together with rapid digital protection against short-circuit regimes in transformer windings. This paper presents an application’s experience of LVI-testing, some results of the use of Frequency Response Analysis (FRA) to check the condition of transformer windings and infra-red control results of electrical equipment. The LVI method and short-circuit inductive reactance measurements are sensitive for detecting such faults as radial, axial winding deformations, a twisting of low-voltage or regulating winding, a losing of winding’s pressing and others.展开更多
Objective:To analyze the current situation of diagnostic radiology equipment in Chinese mainland and to understand changes in the past 20 years,including gaps with other countries,in order to provide a scientific basi...Objective:To analyze the current situation of diagnostic radiology equipment in Chinese mainland and to understand changes in the past 20 years,including gaps with other countries,in order to provide a scientific basis for the government to formulate relevant policies and regulations,and supplement Chinese data for international organizations.Methods:This survey adopted a uniformly designed questionnaire,which was completed by the investigators or the respondents.The survey was distributed to all medical institutions that provided diagnostic radiology services in 31 provinces,autonomous regions,and municipalities,excluding Hong Kong,Macao,Taiwan,and military,China.Results:The survey showed that in the past 20 years,the number of medical institutions and diagnostic radiology equipment per million population in China has increased substantially.Dental radiology equipment increased nine-fold,and mammography equipment and computed tomography scanners showed a nearly five-fold increase.The four types of diagnostic radiology equipment,general diagnostic,fluoroscopic,mammography,and computed tomography,were associated with the population.Dental radiology equipment and bone mineral densitometers were related only to the gross domestic product(GDP).A large gap remains in the diagnostic radiology equipment per million population between China and the equipment of health-care level(HCL)I countries.Conclusions:An imbalance in the number of units of diagnostic radiology equipment per million population was observed in the different regions,China.Various types of diagnostic radiology equipment,especially mammography equipment and computed tomography scanners,need to be deployed to meet the medical needs of different populations.展开更多
目的运用基于熵权的逼近理想解排序法(Technique for Order Preference by Similarity to Ideal Solution,TOPSIS)对医用超声诊断仪的可靠性进行量化评价,判别其可靠性的优劣情况。方法通过文献分析法与专家咨询法构建医用超声诊断仪的...目的运用基于熵权的逼近理想解排序法(Technique for Order Preference by Similarity to Ideal Solution,TOPSIS)对医用超声诊断仪的可靠性进行量化评价,判别其可靠性的优劣情况。方法通过文献分析法与专家咨询法构建医用超声诊断仪的可靠性评价指标,以某三甲医院A、B、C 3种型号的医用超声诊断仪2020—2021年间的故障维修数据作为数据来源,计算指标初始数据,运用熵权法获取各评价指标权重,采用TOPSIS法计算各台设备和各种型号的相对接近度Ci,获取医用超声诊断仪的可靠性评价结果。结果建立的可靠性评价体系包括5个指标:平均故障间隔时间、平均首次故障前工作时间(Mean Time To First Failure,MTTFF)、平均修复时间、故障率及可用度,指标中权重占比较高的有MTTFF和可用度。A、B、C 3种型号设备的Ci分别为0.51342、0.44859、0.30324。3种型号医用超声诊断仪中A型号可靠性较优,B型号次之,C型号较差,评价结果基本能客观真实反映医用超声诊断仪的可靠性水平。结论基于熵权TOPSIS法的医用超声诊断仪可靠性评价体系具有一定可行性,可操作性强,评价结果可为医用超声诊断仪购置、维护保养等提供决策依据。展开更多
文摘Diagnostic equipment can contribute significantly to production and quality.Maintenance budget however is limited so that having a systematic method for allocating part ofit to diagnostic equipment is of great potential value. In this paper, a deterministic dynamicprogramming model for assisting in determining the optimum policy for investment in diagnosticequipment for multistage production systems is developed. The optimum pelticy is determined interms of the amount of equipment used at each stage of production and yields the maximumreturn for the entire system.
文摘Background: Nosocomial infections have become a major challenge in healthcare facilities as they affect the quality of medical care. Radiological imaging plays a crucial role in medical diagnosis. However, the equipment and accessories used increase the risk of transmission of nosocomial bacteria. Objective: This study aims to reveal the extent and nature of microbiological contamination in four hospital diagnostic imaging departments to determine their potential role in the spread of nosocomial bacteria and to evaluate the effectiveness of routine daily disinfection practices in controlling microorganisms in diagnostic imaging departments. Methods & Results: In each department, swabs were taken from the surfaces of selected parts of the equipment and accessories three times a day (early morning, noon, and evening) for five consecutive days. Bacteria were isolated from 65 swabs (36.1% of all samples). The bacteria were isolated 3 times (4.6%) in the morning, 16 times (24.6%) at midday, and 46 times (70.7%) in the evening. The bacteria isolated were Escherichia coli (isolated 34 times;52.3%), Staphylococcus aureus (20 times;30.8%), Staphylococcus epidermidis (6 times;9.3%), and Klebsiella species (5 times;7.7%). Discussion & Conclusion: Findings demonstrated that radiology equipment and accessories are not free of bacteria and further improvements in the sterilization and disinfection of radiology equipment and accessories are needed to protect staff and patients from nosocomial infections.
文摘Medical diagnostic tables are widely used inthemedical diagnostic equipment. For multifarious diagnostic needs, the medical diagnostic table works in various operating modes. In order to ensure patient safety, safety factor of medical diagnostic table must meet safety requirement. The paper puts forward a method to find relations between key parameters and stress of table, identify maximum stress modes, reduce modes number of load test, and remove conservative high stress areas from finite element analysis result, by synthesizingthestress result of finite element analysis and measurement data for various operating modes of medical diagnostic table. It will help shorten test time, avoid over strength design, and reduce table’s cost. An application example of the method is presented by evaluating a specific CT medical diagnostictable. This method can be a reference for safety evaluation of all medical diagnostic tables.
文摘The most important elements of “intellectual networks” (Smart Grid) are the systems of monitoring the parameters of electrical equipment. Information-measuring systems (IMS), which described in this paper, were proposed to use together with rapid digital protection against short-circuit regimes in transformer windings. This paper presents an application’s experience of LVI-testing, some results of the use of Frequency Response Analysis (FRA) to check the condition of transformer windings and infra-red control results of electrical equipment. The LVI method and short-circuit inductive reactance measurements are sensitive for detecting such faults as radial, axial winding deformations, a twisting of low-voltage or regulating winding, a losing of winding’s pressing and others.
文摘Objective:To analyze the current situation of diagnostic radiology equipment in Chinese mainland and to understand changes in the past 20 years,including gaps with other countries,in order to provide a scientific basis for the government to formulate relevant policies and regulations,and supplement Chinese data for international organizations.Methods:This survey adopted a uniformly designed questionnaire,which was completed by the investigators or the respondents.The survey was distributed to all medical institutions that provided diagnostic radiology services in 31 provinces,autonomous regions,and municipalities,excluding Hong Kong,Macao,Taiwan,and military,China.Results:The survey showed that in the past 20 years,the number of medical institutions and diagnostic radiology equipment per million population in China has increased substantially.Dental radiology equipment increased nine-fold,and mammography equipment and computed tomography scanners showed a nearly five-fold increase.The four types of diagnostic radiology equipment,general diagnostic,fluoroscopic,mammography,and computed tomography,were associated with the population.Dental radiology equipment and bone mineral densitometers were related only to the gross domestic product(GDP).A large gap remains in the diagnostic radiology equipment per million population between China and the equipment of health-care level(HCL)I countries.Conclusions:An imbalance in the number of units of diagnostic radiology equipment per million population was observed in the different regions,China.Various types of diagnostic radiology equipment,especially mammography equipment and computed tomography scanners,need to be deployed to meet the medical needs of different populations.
文摘目的运用基于熵权的逼近理想解排序法(Technique for Order Preference by Similarity to Ideal Solution,TOPSIS)对医用超声诊断仪的可靠性进行量化评价,判别其可靠性的优劣情况。方法通过文献分析法与专家咨询法构建医用超声诊断仪的可靠性评价指标,以某三甲医院A、B、C 3种型号的医用超声诊断仪2020—2021年间的故障维修数据作为数据来源,计算指标初始数据,运用熵权法获取各评价指标权重,采用TOPSIS法计算各台设备和各种型号的相对接近度Ci,获取医用超声诊断仪的可靠性评价结果。结果建立的可靠性评价体系包括5个指标:平均故障间隔时间、平均首次故障前工作时间(Mean Time To First Failure,MTTFF)、平均修复时间、故障率及可用度,指标中权重占比较高的有MTTFF和可用度。A、B、C 3种型号设备的Ci分别为0.51342、0.44859、0.30324。3种型号医用超声诊断仪中A型号可靠性较优,B型号次之,C型号较差,评价结果基本能客观真实反映医用超声诊断仪的可靠性水平。结论基于熵权TOPSIS法的医用超声诊断仪可靠性评价体系具有一定可行性,可操作性强,评价结果可为医用超声诊断仪购置、维护保养等提供决策依据。
