共查询到20条相似文献,搜索用时 62 毫秒
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本文介绍了XY110型X射线机控制电路工作原理,阐述了XY110型X射线机控制电路的三个常见故障检修实例,并提供了相关部分的电原理图。 相似文献
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为了阐明电源质量对X射线机照射质量的影响,本文首先从电路的原理分析了电源电阻对X射线机照射质量的影响,并举例说明,最后给出如何减少电源电阻对照射质量影响的具体方法。 相似文献
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胡中坚 《中国医疗器械杂志》1985,(4)
故障情况: 透视时机器mA表指数在0.5~5mA范围内变化无常;摄片mA时指数时高时低。检修经检查,电源供电,高压变压器初级电路的接线和接点,管电流测量电路、高压整流管及其电路、X线管灯丝加热初级电路均正常。初步确认故障发生在X路管灯丝加热次级电路,它包括加热变压器、高压电缆、X线管以及高压插头、插座等部件。 相似文献
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周炳耀 《中国医疗器械杂志》1992,16(6):346-350
一、工频X射线机的局限性在医用诊断X射线机的发展过程中,除了减轻医务人员劳动强度、加强对射线的防护予以应有的重视之外,主要是不断改善图象质量。但是对所有X射线机的供电始终是工频电源→自耦变压器→高压发生器→X射 相似文献
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DR数字X射线机是当今使用最为广泛的诊断检查设备,其故障率较高,高频逆变器通常由预置控制信号来控制高压的产生,它由一个电源电压,通过脉冲调制为40~100 kHz的高压信号,该信号发送到高压发生器,通过高压发生器和整流电路将初级电压变成40~150 kV高压,以控制X射线的产生.高频逆变器一般由直流电源、直流逆变和逆变控制三部分组成.电源可由交流电源整流后变为直流电源,将直流电压变换为高频电压的过程称之为直流逆变 相似文献
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STENOSCOP2型X线机是配有X线电视系统的移动式X线机,采用C臂设计,高频逆变产生X线,主要用来作术中透视。其电源电路原理分析如下:此电路主要由变压器9TR1和5TRl组成,由其次级提供各单元电路所需的不同电压。9TR1的初级绕阻通过联锁开关9Sml和继电器9K1动作得电。当9Sml闭合时,外部电源经防突波电阻9R1保险9F2 相似文献
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W H Masters 《Hospital practice (Office ed.)》1986,21(8):175-7, 182-92, 197-8
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Pors AG 《World hospitals》1991,27(2):18-28
Hospitals all over Europe must get ready to face the important challenge of 1993 at all levels: micro-economic, macro-economic, local, regional and European. Despite the liberalization trends which will inevitably appear with the increased freedom of exchange and movement, hospitals must strive to remain havens of peace to patients. 相似文献
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Renders CM Seidell JC van Mechelen W Hirasing RA 《Nederlands tijdschrift voor geneeskunde》2004,148(42):2066-2070
The prevalence of overweight and obesity in children is increasing rapidly. This is alarming because obesity is associated with severe chronic diseases, such as type 2 diabetes mellitus. Obesity at young age is related to obesity at adult age. Consequently, the prevention of overweight from childhood onwards is an important issue. Apart from diabetes mellitus type 2 there is an increased risk of orthopaedic complications, respiratory problems, fertility problems, cardiovascular diseases and psychosocial consequences in the form of a negative self-image, emotional and behavioural problems and depression. Environmental and behavioural factors are regarded as the most important causes of the rapid increase in the prevalence of overweight and as the most important starting points for prevention. Most prevention programmes are still in the initial stages. Prevention programmes aimed at stimulating breast feeding and daily physical activity (playing outside) and the restriction of sweetened drinks and watching TV are very promising. With such preventive measures the involvement of both the school and the parents is important. 相似文献